CLASS 10 SCIENCE 2026: 🚀 FINAL REVISION MASTER KIT

Table of Contents

🚀 FINAL REVISION MASTER KIT

(Just Before Exam | English Medium)

I am giving you structured, high-speed revision content 👇

🔥 PART 1: 100 MAIN REVISION POINTS

(Physics + Chemistry + Biology – Ultra Quick Notes)

🔵 PHYSICS (1–35)

Laws of reflection – i = r
Concave mirror – can form real & inverted image
Convex mirror – always virtual & erect
Mirror formula: 1/f = 1/v + 1/u
Magnification (mirror) = –v/u
Refraction – bending of light
Snell’s Law: sin i / sin r = constant
Power of lens = 1/f (in metre)
Unit of power = Dioptre
Convex lens – converging
Concave lens – diverging
Ohm’s Law: V = IR
Resistance = V/I
Resistivity depends on material
Series circuit – current same
Parallel circuit – voltage same
Electric power = VI
P = I²R
P = V²/R
1 kWh = 3.6 × 10⁶ J
Magnetic field lines never intersect
Fleming’s Left Hand Rule – Motor
Fleming’s Right Hand Rule – Generator
Electric motor converts electrical to mechanical
Electric generator converts mechanical to electrical
Domestic circuit – parallel connection
Fuse works on heating effect
Blue colour of sky – scattering
Red colour at sunrise – scattering
Twinkling of stars – atmospheric refraction
Far point of normal eye – infinity
Near point – 25 cm
Myopia – concave lens
Hypermetropia – convex lens
Human eye contains retina & optic nerve

🟠 CHEMISTRY (36–70)

Chemical equation must be balanced
Combination reaction – single product
Decomposition – breakdown reaction
Displacement – more reactive replaces less reactive
Corrosion – rusting
Rancidity – oxidation of oils
pH scale – 0 to 14
pH < 7 acidic
pH > 7 basic
Neutralisation – salt + water
Baking soda – NaHCO₃
Washing soda – Na₂CO₃·10H₂O
Bleaching powder – CaOCl₂
Metals form positive ions
Non-metals form negative ions
Ionic bond – transfer of electrons
Covalent bond – sharing of electrons
Carbon valency = 4
Homologous series differ by CH₂
Ethanol – alcohol
Ethanoic acid – vinegar
Soap forms micelles
Hard water doesn’t form lather easily
Periodic table based on atomic number
Valency same in group
Atomic size increases down group
Reactivity of metals increases down group
Zinc reacts with acid → H₂
Iron rusts in presence of air + moisture
Amphoteric oxides – react with acid & base
Na reacts violently with water
Hydrogen gas burns with pop sound
Carbon shows catenation
Allotropes of carbon – diamond, graphite
Covalent compounds have low melting point

🟢 BIOLOGY (71–100)

Photosynthesis occurs in chloroplast
Equation: 6CO₂ + 6H₂O → Glucose + O₂
Stomata regulate gas exchange
Aerobic respiration uses oxygen
Anaerobic respiration produces lactic acid
Heart has four chambers
Arteries carry blood away
Veins carry blood towards heart
Nephron – functional unit of kidney
Reflex action controlled by spinal cord
Brain controls voluntary actions
Endocrine glands secrete hormones
Thyroid needs iodine
Pancreas secretes insulin
Reproduction ensures continuity
Male gamete – sperm
Female gamete – ovum
Pollination – transfer of pollen
Fertilisation – fusion of gametes
Mendel worked on pea plants
Monohybrid ratio – 3:1
Dihybrid ratio – 9:3:3:1
Chromosomes carry genes
Sex determination – XY system
Food chain starts with producers
Ozone layer protects from UV
CFC damages ozone
Biodegradable substances decompose naturally
3Rs – Reduce, Reuse, Recycle
Ecosystem includes biotic + abiotic factors

100 Most Important ONE WORD Questions with Answers
(Physics + Chemistry + Biology | Final Revision)

🔵 PHYSICS (1–35)

Unit of electric current — Ampere
Unit of resistance — Ohm
Unit of electric power — Watt
SI unit of charge — Coulomb
Instrument to measure current — Ammeter
Instrument to measure voltage — Voltmeter
Device that converts electrical to mechanical energy — Motor
Device that converts mechanical to electrical energy — Generator
Defect corrected by concave lens — Myopia
Defect corrected by convex lens — Hypermetropia
Bending of light — Refraction
Return of light — Reflection
Splitting of white light — Dispersion
Twinkling of stars due to — Refraction
Blue colour of sky due to — Scattering
Mirror used in rear view — Convex
Converging mirror — Concave
Diverging lens — Concave
Converging lens — Convex
Formula V = IR is — Ohm’s Law
Near point of normal eye — 25cm
Far point of normal eye — Infinity
Heating effect discovered by — Joule
Magnetic field unit — Tesla
Rule for motor — Fleming
Commercial unit of energy — kWh
Colour with longest wavelength — Red
Colour with shortest wavelength — Violet
Image formed by plane mirror — Virtual
Power of lens unit — Dioptre
SI unit of energy — Joule
Magnetic lines never — Intersect
Domestic circuits are connected in — Parallel
Resistance of conductor increases with — Temperature
Eye screen — Retina

🟠 CHEMISTRY (36–70)

Rust is — Iron Oxide
Formula of baking soda — NaHCO₃
Formula of washing soda — Na₂CO₃·10H₂O
Formula of bleaching powder — CaOCl₂
Scale measuring acidity — pH
pH of pure water — 7
Acid present in vinegar — Acetic
Gas evolved with acids and metals — Hydrogen
Reaction with single product — Combination
Breakdown reaction — Decomposition
Replacement reaction — Displacement
Oxidation is addition of — Oxygen
Reduction is removal of — Oxygen
Valency of carbon — 4
Carbon shows — Catenation
Bond by sharing electrons — Covalent
Bond by transfer of electrons — Ionic
Non-metal liquid at room temperature — Bromine
Most reactive metal — Potassium
Hardest natural substance — Diamond
Soft allotrope of carbon — Graphite
Soap forms — Micelles
Metal stored in kerosene — Sodium
Acid turns blue litmus — Red
Base turns red litmus — Blue
Neutral solution pH — 7
Universal indicator shows — Colour
Atomic number equals number of — Protons
Same valency elements in — Group
Horizontal row in periodic table — Period
Substance that speeds reaction — Catalyst
Metal oxide nature — Basic
Non-metal oxide nature — Acidic
Amphoteric oxide example — Aluminium
Rancidity is due to — Oxidation

🟢 BIOLOGY (71–100)

Site of photosynthesis — Chloroplast
Green pigment — Chlorophyll
Gas released in photosynthesis — Oxygen
Breakdown of food — Respiration
Functional unit of kidney — Nephron
Blood pumping organ — Heart
Blood pigment — Haemoglobin
Male gamete — Sperm
Female gamete — Ovum
Fusion of gametes — Fertilisation
Transfer of pollen — Pollination
Hormone controlling sugar — Insulin
Hormone of thyroid — Thyroxine
Reflex controlled by — Spinal cord
Study of heredity — Genetics
Mendel’s experiment plant — Pea
Monohybrid ratio — 3:1
Dihybrid ratio — 9:3:3:1
Carrier of heredity — Gene
Sex chromosome in male — XY
Food chain begins with — Producers
Ozone layer protects from — UV
Ozone depletion gas — CFC
Biodegradable example — Paper
Non-biodegradable example — Plastic
3R first — Reduce
Largest part of brain — Cerebrum
Balance of body — Cerebellum
Plant growth hormone — Auxin
Ecosystem includes — Biotic

📘 CLASS 10 SCIENCE

🔥 100 RAPID FIRE MCQs

(Physics + Chemistry + Biology)
✅ Proper MCQ Format
✅ Answers Given Together in Table at the End
✅ No Question Skipped

🔵 PHYSICS (1–35)

1. The SI unit of electric current is:
A) Volt B) Ampere C) Ohm D) Watt

2. Ohm’s Law is:
A) V = IR B) P = VI C) R = VI D) V = I²R

3. The commercial unit of energy is:
A) Joule B) Watt C) kWh D) Volt

4. Power of lens is measured in:
A) Metre B) Dioptre C) Watt D) Tesla

5. A concave mirror forms image at focus when object is at:
A) F B) C C) Infinity D) Between F & C

6. Rear view mirror is:
A) Concave B) Convex C) Plane D) Cylindrical

7. Blue colour of sky is due to:
A) Reflection B) Refraction C) Scattering D) Dispersion

8. Twinkling of stars is due to:
A) Dispersion B) Refraction C) Reflection D) Scattering

9. Unit of resistance:
A) Volt B) Watt C) Ohm D) Ampere

10. P = I²R represents:
A) Current B) Resistance C) Power D) Voltage

11. Near point of normal eye:
A) 20 cm B) 25 cm C) 30 cm D) Infinity

12. Magnetic field lines never:
A) Meet B) Bend C) Intersect D) Form loops

13. Fleming’s Left Hand Rule is for:
A) Generator B) Motor C) Transformer D) Fuse

14. Concave lens is:
A) Converging B) Diverging C) Reflecting D) Plane

15. Electric generator converts:
A) Electrical to mechanical
B) Mechanical to electrical
C) Heat to electrical
D) Chemical to mechanical

16. Unit of charge:
A) Coulomb B) Ampere C) Watt D) Joule

17. Human eye image forms on:
A) Cornea B) Retina C) Iris D) Pupil

18. Myopia corrected by:
A) Convex B) Concave C) Plane D) Bifocal

19. Hypermetropia corrected by:
A) Convex B) Concave C) Plane D) Prism

20. Snell’s Law relates to:
A) Reflection B) Refraction C) Power D) Energy

21–35 (Continuing Physics Rapid Fire)

1 kWh equals:
A) 3.6×10⁶ J B) 3600 J C) 1000 J D) 1 J
Voltage is measured by:
A) Ammeter B) Voltmeter C) Galvanometer D) Meter
Resistance increases with:
A) Area B) Length C) Temperature D) Voltage
Convex mirror always forms:
A) Real B) Virtual C) Inverted D) Enlarged
Heating effect discovered by:
A) Newton B) Joule C) Faraday D) Ohm
Longest wavelength colour:
A) Red B) Blue C) Violet D) Green
Shortest wavelength colour:
A) Red B) Yellow C) Violet D) Orange
Mirror formula:
A) 1/f = 1/v + 1/u
B) V = IR
C) P = VI
D) R = V/I
Domestic circuits are connected in:
A) Series B) Parallel C) Mixed D) None
SI unit of energy:
A) Joule B) Watt C) kWh D) Volt
Magnetic field unit:
A) Tesla B) Ohm C) Joule D) Ampere
Diverging mirror:
A) Concave B) Convex C) Plane D) None
Far point of normal eye:
A) 25 cm B) 1 m C) Infinity D) 50 cm
Retina contains:
A) Rods & Cones B) Veins C) Nerves D) Bones
Refraction occurs due to change in:
A) Speed B) Colour C) Shape D) Heat

🟠 CHEMISTRY (36–70)

36. Rust is:
A) Iron sulphide B) Iron oxide C) Iron nitrate D) Iron chloride

37. pH of acid is:
A) >7 B) =7 C) <7 D) 14

38. Baking soda formula:
A) Na₂CO₃ B) NaHCO₃ C) CaCO₃ D) NaCl

39. Bleaching powder formula:
A) CaOCl₂ B) NaCl C) CaCl₂ D) HCl

40. Combination reaction forms:
A) Two products B) One product C) Gas only D) Water

41–70 (Complete Chemistry Set)

Valency of carbon: A) 2 B) 4 C) 3 D) 1
Covalent bond formed by: A) Transfer B) Sharing C) Donation D) Breaking
Ionic bond formed by: A) Sharing B) Transfer C) Mixing D) Breaking
Acid turns blue litmus: A) Red B) Blue C) Green D) Yellow
Base turns red litmus: A) Blue B) Red C) Green D) Black
Washing soda contains water of: A) 5 B) 7 C) 10 D) 2
Hardest carbon allotrope: A) Graphite B) Diamond C) Coal D) Fullerene
Soap forms: A) Ions B) Micelles C) Salts D) Gas
Hydrogen gas gives: A) Pop sound B) Smell C) Colour D) Smoke
Periodic table based on: A) Mass B) Atomic number C) Density D) Volume
Group elements have same: A) Mass B) Valency C) Size D) Colour
Amphoteric oxide: A) Na₂O B) CO₂ C) Al₂O₃ D) SO₂
Oxidation is addition of: A) Hydrogen B) Oxygen C) Nitrogen D) Carbon
Rancidity due to: A) Reduction B) Oxidation C) Heating D) Cooling
Most reactive metal: A) Cu B) K C) Fe D) Ag
Non-metal liquid: A) Chlorine B) Bromine C) Iodine D) Oxygen
Homologous series differ by: A) CH₄ B) CH₂ C) CO₂ D) H₂
Ethanol functional group: A) –COOH B) –OH C) –CHO D) –NH₂
Vinegar contains: A) Ethanol B) Acetic acid C) Methane D) NaCl
Neutral pH value: A) 7 B) 0 C) 14 D) 5
Metal stored in kerosene: A) Fe B) Zn C) Na D) Cu
Catalyst does: A) Slow reaction B) Speed reaction C) Stop reaction D) Melt
Metal oxide nature: A) Acidic B) Basic C) Neutral D) None
Carbon shows: A) Catenation B) Reduction C) Oxidation D) Fusion
Non-metal oxides are: A) Basic B) Acidic C) Neutral D) Metallic
pH scale range: A) 0–7 B) 1–10 C) 0–14 D) 5–14
Valency equals number of: A) Neutrons B) Protons C) Electrons lost/gained D) Mass
Rusting requires: A) Air only B) Water only C) Air + Moisture D) Heat
Decomposition reaction needs: A) Energy B) Salt C) Base D) Acid
Hydrogen is: A) Metal B) Non-metal C) Metalloid D) Gas only

🟢 BIOLOGY (71–100)

Photosynthesis occurs in: A) Mitochondria B) Chloroplast C) Nucleus D) Ribosome
Functional unit of kidney: A) Nephron B) Neuron C) Alveoli D) Villus
Heart chambers: A) 2 B) 3 C) 4 D) 5
Blood pigment: A) Melanin B) Haemoglobin C) Insulin D) Plasma
Male gamete: A) Ovum B) Sperm C) Zygote D) Embryo
Mendel worked on: A) Wheat B) Pea C) Rice D) Maize
Monohybrid ratio: A) 3:1 B) 9:3:3:1 C) 1:2:1 D) 2:1
Ozone protects from: A) Infrared B) UV C) X-ray D) Gamma
Reflex controlled by: A) Brain B) Spinal cord C) Heart D) Liver
Insulin secreted by: A) Liver B) Pancreas C) Kidney D) Brain
Pollination is transfer of: A) Ovule B) Pollen C) Seed D) Fruit
Fertilisation is fusion of: A) Cells B) Gametes C) Tissues D) Organs
XY represents: A) Female B) Male C) Both D) None
Food chain starts with: A) Consumer B) Producer C) Decomposer D) Omnivore
Biodegradable example: A) Plastic B) Glass C) Paper D) Metal
3R first step: A) Reuse B) Recycle C) Reduce D) Recover
Largest brain part: A) Cerebellum B) Cerebrum C) Medulla D) Spinal
Growth hormone in plants: A) Auxin B) Insulin C) Thyroxine D) Adrenaline
Thyroid hormone: A) Insulin B) Thyroxine C) Estrogen D) Progesterone
Dihybrid ratio: A) 3:1 B) 9:3:3:1 C) 1:1 D) 2:1
Gene located on: A) Cell wall B) Chromosome C) Cytoplasm D) Ribosome
Arteries carry blood: A) To heart B) Away from heart C) Both D) None
Veins carry blood: A) Away B) To heart C) Same D) None
Respiration releases: A) Oxygen B) Energy C) Nitrogen D) Carbon
Stomata present on: A) Root B) Leaf C) Stem D) Flower
Ecosystem includes: A) Plants B) Animals C) Biotic + Abiotic D) Water only
CFC causes: A) Pollution B) Ozone depletion C) Rain D) Snow
Balance of body: A) Cerebrum B) Cerebellum C) Medulla D) Spine
Anaerobic respiration produces: A) CO₂ B) Lactic acid C) Oxygen D) Water
Fusion of male & female gamete forms: A) Embryo B) Zygote C) Foetus D) Seed

Q No	Ans	Q No	Ans
1 B	2 A	3 C	4 B
5 C	6 B	7 C	8 B
9 C	10 C	11 B	12 C
13 B	14 B	15 B	16 A
17 B	18 B	19 A	20 B
21 A	22 B	23 C	24 B
25 B	26 A	27 C	28 A
29 B	30 A	31 A	32 B
33 C	34 A	35 A	36 B
37 C	38 B	39 A	40 B
41 B	42 B	43 B	44 A
45 A	46 C	47 B	48 B
49 A	50 B	51 B	52 C
53 B	54 B	55 B	56 B
57 B	58 B	59 B	60 A
61 C	62 B	63 B	64 A
65 B	66 C	67 C	68 C
69 A	70 B	71 B	72 A
73 C	74 B	75 B	76 B
77 A	78 B	79 B	80 B
81 B	82 B	83 B	84 B
85 C	86 C	87 B	88 A
89 B	90 B	91 B	92 B
93 B	94 B	95 B	96 C
97 B	98 B	99 B	100 B

📘 CLASS 10 SCIENCE

🎯 50 LONG ANSWER – 4 POINTS FORMAT

(Board Pattern | Exam Ready | English Medium)

Each answer written in 4 clear scoring points 👇

🔵 PHYSICS (1–15)

1. Laws of Reflection

Angle of incidence equals angle of reflection.
Incident ray, reflected ray and normal lie in same plane.
Reflection occurs on smooth surfaces.
Image formed is virtual in plane mirror.

2. Image Formation by Concave Mirror (Object beyond C)

Image formed between F and C.
Image is real.
Image is inverted.
Image is diminished.

3. Refraction of Light

Bending of light when it passes from one medium to another.
Caused due to change in speed.
Follows Snell’s Law.
Depends on refractive index.

4. Power of Lens

Power = 1/f (f in metre).
Unit is Dioptre.
Convex lens has positive power.
Concave lens has negative power.

5. Ohm’s Law

V ∝ I (at constant temperature).
V = IR.
R is resistance.
Graph between V and I is straight line.

6. Electric Power

P = VI.
P = I²R.
P = V²/R.
Unit is Watt.

7. Electric Motor

Converts electrical energy into mechanical energy.
Based on Fleming’s Left Hand Rule.
Works on magnetic force on current.
Used in fans, mixers.

8. Magnetic Field Lines

Originate from North pole.
End at South pole.
Never intersect.
Closer lines mean stronger field.

9. Human Eye

Image forms on retina.
Retina contains rods and cones.
Iris controls light entry.
Optic nerve carries signals.

10. Myopia

Cannot see distant objects clearly.
Image forms before retina.
Corrected by concave lens.
Also called short-sightedness.

11. Hypermetropia

Cannot see nearby objects clearly.
Image forms behind retina.
Corrected by convex lens.
Also called long-sightedness.

12. Heating Effect of Current

Electric current produces heat.
Heat ∝ I²Rt.
Used in heaters.
Based on Joule’s Law.

13. Domestic Electric Circuit

Appliances connected in parallel.
Voltage remains same.
Fuse protects circuit.
Earth wire prevents shock.

14. Scattering of Light

Caused by small particles.
Blue light scatters more.
Sky appears blue.
Sun appears red at sunrise.

15. Electric Generator

Converts mechanical to electrical energy.
Based on electromagnetic induction.
Uses rotating coil.
Follows Fleming’s Right Hand Rule.

🟠 CHEMISTRY (16–32)

16. Combination Reaction

Two or more substances combine.
Single product formed.
Usually exothermic.
Example: CaO + H₂O.

17. Decomposition Reaction

Single compound breaks down.
Requires energy.
Can be thermal, electrolytic or photolytic.
Example: CaCO₃.

18. Displacement Reaction

More reactive metal replaces less reactive.
Occurs in salt solutions.
Produces new salt.
Example: Zn + CuSO₄.

19. Corrosion

Slow destruction of metal.
Requires air and moisture.
Forms rust (iron oxide).
Prevented by painting or galvanising.

20. pH Scale

Measures acidity/basicity.
Range 0–14.
<7 acidic.
7 basic.

21. Ionic Bond

Formed by transfer of electrons.
Between metal and non-metal.
Forms ions.
High melting point.

22. Covalent Bond

Formed by sharing electrons.
Between non-metals.
Low melting point.
Poor conductor.

23. Properties of Metals

Malleable.
Ductile.
Good conductors.
Form basic oxides.

24. Properties of Non-metals

Brittle.
Poor conductor.
Form acidic oxides.
Gain electrons.

25. Carbon Compounds

Show catenation.
Tetravalent.
Form covalent bonds.
Large number of compounds.

26. Homologous Series

Same functional group.
Same general formula.
Differ by CH₂.
Similar chemical properties.

27. Ethanol

Alcohol functional group –OH.
Used as fuel.
Colourless liquid.
Neutral in nature.

28. Ethanoic Acid

Contains –COOH group.
Acidic in nature.
Found in vinegar.
Reacts with bases.

29. Soap Cleansing Action

Forms micelles.
Trap dirt particles.
Works in soft water.
Poor in hard water.

30. Periodic Table

Arranged by atomic number.
Same valency in group.
7 periods.
18 groups.

31. Oxidation

Addition of oxygen.
Removal of hydrogen.
Loss of electrons.
Example: Rusting.

32. Reduction

Removal of oxygen.
Gain of hydrogen.
Gain of electrons.
Opposite of oxidation.

🟢 BIOLOGY (33–50)

33. Photosynthesis

Occurs in chloroplast.
Needs sunlight.
Uses CO₂ and water.
Produces glucose and oxygen.

34. Human Heart

Four chambers.
Pumps blood.
Double circulation.
Prevents mixing of blood.

35. Respiration

Breakdown of glucose.
Releases energy.
Aerobic uses oxygen.
Anaerobic produces lactic acid.

36. Excretion

Removal of wastes.
Done by kidneys.
Nephron is unit.
Maintains water balance.

37. Nervous System

Brain controls body.
Spinal cord reflexes.
Nerves transmit signals.
Fast response system.

38. Endocrine System

Secretes hormones.
Slow control system.
Insulin regulates sugar.
Thyroxine controls metabolism.

39. Reproduction

Ensures continuity.
Asexual – single parent.
Sexual – two parents.
Produces variation.

40. Mendel’s Monohybrid Cross

One trait studied.
F1 all same.
F2 ratio 3:1.
Law of dominance.

41. Dihybrid Cross

Two traits studied.
Independent assortment.
F2 ratio 9:3:3:1.
Traits inherited independently.

42. Food Chain

Flow of energy.
Starts with producers.
Ends with decomposers.
Maintains ecosystem balance.

43. Ozone Layer

Present in stratosphere.
Protects from UV rays.
Damaged by CFC.
Causes global concern.

44. Biodegradable Substances

Decompose naturally.
By microorganisms.
Do not pollute long-term.
Example: Paper.

45. Non-biodegradable Substances

Do not decompose easily.
Cause pollution.
Accumulate in environment.
Example: Plastic.

46. Plant Hormones

Auxin – growth.
Gibberellin – elongation.
Cytokinin – division.
ABA – growth inhibitor.

47. Pollination

Transfer of pollen.
Wind/insects.
Leads to fertilisation.
Essential for seed formation.

48. Fertilisation

Fusion of gametes.
Forms zygote.
Occurs in ovary.
Leads to embryo.

49. Reflex Action

Immediate response.
Controlled by spinal cord.
Protective mechanism.
Involuntary action.

50. Ecosystem

Biotic + Abiotic.
Energy flow.
Food chains.
Maintains balance.

🔵 PHYSICS DIAGRAMS (1–10)

1. Ray Diagram – Concave Mirror (Object Beyond C)

Labels:

C (Centre of curvature)
F (Focus)
Principal Axis
Real & Inverted Image

2. Ray Diagram – Convex Mirror

Labels:

F and C behind mirror
Virtual & Diminished Image

3. Ray Diagram – Convex Lens (Object Between F and 2F)

Labels:

F1, F2
2F1, 2F2
Real & Enlarged Image

4. Ray Diagram – Concave Lens

Labels:

Virtual & Diminished Image
Focus (F)
Optical Centre

5. Human Eye Structure

Labels:

Cornea
Iris
Pupil
Lens
Retina
Optic Nerve

6. Correction of Myopia

Diagram shows:

Concave lens
Image formed on retina

7. Correction of Hypermetropia

Diagram shows:

Convex lens
Image formed on retina

8. Electric Circuit (Ohm’s Law Setup)

Labels:

Battery
Key
Ammeter (Series)
Voltmeter (Parallel)
Resistor

9. Magnetic Field Lines Around Bar Magnet

Labels:

North Pole
South Pole
Direction of lines

10. Electric Motor Diagram

Labels:

Armature coil
Split ring
Brushes
Magnet
Battery

🟠 CHEMISTRY DIAGRAMS (11–18)

11. Electrolysis of Water Setup

Labels:

Cathode
Anode
H₂ Gas
O₂ Gas
Battery

12. Experimental Setup for Rusting of Iron

Labels:

Test tube
Iron nail
Water
Air

13. pH Scale Diagram (0–14)

Mark:

Strong Acid
Neutral
Strong Base

14. Electron Dot Structure – NaCl

Show:

Transfer of electron
Na⁺
Cl⁻

15. Electron Dot Structure – CH₄

Show:

Carbon (4 valence electrons)
Four shared pairs

16. Homologous Series Structure (Alkanes)

Example:

CH₄
C₂H₆
C₃H₈

17. Soap Micelle Structure

Labels:

Hydrophilic head
Hydrophobic tail
Dirt particle

18. Periodic Table (First 20 Elements – Block Layout)

Mark:

Groups
Periods

🟢 BIOLOGY DIAGRAMS (19–30)

19. Human Heart

Labels:

Right Atrium
Right Ventricle
Left Atrium
Left Ventricle

20. Human Excretory System

Labels:

Kidney
Ureter
Urinary Bladder
Urethra

21. Nephron Structure

Labels:

Bowman’s Capsule
Glomerulus
Tubule
Collecting Duct

22. Human Digestive System

Labels:

Mouth
Oesophagus
Stomach
Small Intestine
Large Intestine

23. Structure of Stomata

Labels:

Guard Cells
Stomatal Pore

24. Photosynthesis Diagram

Show:

Sunlight
CO₂
H₂O
Glucose
O₂

25. L.S. of Flower

Labels:

Sepal
Petal
Stamen
Pistil

26. Male Reproductive System

Labels:

Testis
Vas deferens
Prostate
Penis

27. Female Reproductive System

Labels:

Ovary
Fallopian Tube
Uterus
Vagina

28. Binary Fission in Amoeba

Show:

Nucleus division
Cytoplasm division

29. Mendel’s Dihybrid Cross (Punnett Square)

Show:

RrYy × RrYy
9:3:3:1 Ratio

30. Food Chain Diagram

Example:

Grass → Goat → Human
Show energy flow arrow

🔥 MOST LIKELY TO COME (VERY HIGH PROBABILITY)

✔ Ray Diagram (Mirror or Lens)
✔ Human Eye
✔ Electric Motor
✔ Human Heart
✔ Excretory System
✔ L.S. of Flower
✔ Nephron
✔ Mendel Cross

📘 CLASS 10 SCIENCE

🔥 20 NUMERICALS – QUESTIONS WITH ANSWERS

🔵 LIGHT

1. Question:

The radius of curvature of a concave mirror is 40 cm. Find its focal length.

Solution:
Formula:
f = R/2

f = 40/2
f = 20 cm

For concave mirror → f is negative

✅ Answer: –20 cm

2. Question:

An object is placed 30 cm in front of a concave mirror of focal length 15 cm. Find the image distance.

Solution:
u = –30 cm
f = –15 cm

Mirror formula:
1/f = 1/v + 1/u

1/–15 = 1/v + 1/–30

–2 = 30/v –1

–1 = 30/v

v = –30 cm

✅ Answer: –30 cm

3. Question:

Find magnification if object distance = –20 cm and image distance = –40 cm.

Solution:
m = –v/u

m = –(–40)/–20
= 40/–20
= –2

✅ Answer: –2

4. Question:

Find the power of a convex lens of focal length 50 cm.

Solution:
f = 50 cm = 0.5 m

P = 1/f

P = 1/0.5
P = +2 D

✅ Answer: +2 D

5. Question:

Find focal length of a lens of power –2 D.

Solution:
P = 1/f

f = 1/–2
f = –0.5 m
= –50 cm

✅ Answer: –50 cm

⚡ ELECTRICITY

6. Question:

Find resistance if V = 10V and I = 2A.

Solution:
R = V/I

R = 10/2
R = 5Ω

✅ Answer: 5Ω

7. Question:

Find current if V = 12V and R = 4Ω.

Solution:
I = V/R

I = 12/4
I = 3A

✅ Answer: 3A

8. Question:

Find power if V = 220V and I = 0.5A.

Solution:
P = VI

P = 220 × 0.5
P = 110 W

✅ Answer: 110 W

9. Question:

Find power if I = 3A and R = 5Ω.

Solution:
P = I²R

P = 9 × 5
P = 45 W

✅ Answer: 45 W

10. Question:

Find heat produced if I = 2A, R = 10Ω, t = 5 min.

Solution:
t = 5 min = 300 s

H = I²Rt

H = 4 × 10 × 300
H = 12000 J

✅ Answer: 12,000 J

11. Question:

Find energy consumed by a 100W bulb in 5 hours (in kWh).

Solution:
Energy = Power × Time

= 100 × 5
= 500 Wh
= 0.5 kWh

✅ Answer: 0.5 kWh

12. Question:

Three resistors 2Ω, 3Ω and 6Ω are connected in series. Find total resistance.

Solution:
R = 2 + 3 + 6
R = 11Ω

✅ Answer: 11Ω

13. Question:

Three resistors 2Ω, 3Ω and 6Ω are connected in parallel. Find total resistance.

Solution:
1/R = 1/2 + 1/3 + 1/6

= 3 + 2 + 1
= 6/6
= 1

R = 1Ω

✅ Answer: 1Ω

14. Question:

Find charge if 5A current flows for 10 seconds.

Solution:
Q = It

Q = 5 × 10
Q = 50 C

✅ Answer: 50 C

15. Question:

A current of 4A flows for 5 seconds. Find charge.

Solution:
Q = It

Q = 4 × 5
Q = 20 C

✅ Answer: 20 C

🧲 ENERGY

16. Question:

Find energy consumed by a 1kW heater in 2 hours.

Solution:
Energy = Power × Time

= 1 × 2
= 2 kWh

✅ Answer: 2 kWh

17. Question:

Convert 1 kWh into Joules.

Solution:
1 kWh = 1000W × 3600s

= 3.6 × 10⁶ J

✅ Answer: 3.6 × 10⁶ J

👁 HUMAN EYE

18. Question:

Near point of a person is 50 cm. Which lens is required?

Solution:
Normal near point = 25 cm

Defect = Hypermetropia

Correction → Convex lens

✅ Answer: Convex Lens

19. Question:

Far point of a myopic person is 2 m. Find power of corrective lens.

Solution:
f = –2 m

P = 1/f

P = –0.5 D

✅ Answer: –0.5 D

20. Question:

Find current if 220V supply is connected to 44Ω resistor.

Solution:
I = V/R

I = 220/44
I = 5A

✅ Answer: 5A

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🚀 FINAL REVISION MASTER KIT

🔥 PART 1: 100 MAIN REVISION POINTS

🔵 PHYSICS (1–35)

🟠 CHEMISTRY (36–70)

🟢 BIOLOGY (71–100)

100 Most Important ONE WORD Questions with Answers(Physics + Chemistry + Biology | Final Revision)

🔵 PHYSICS (1–35)

🟠 CHEMISTRY (36–70)

🟢 BIOLOGY (71–100)

📘 CLASS 10 SCIENCE

🔥 100 RAPID FIRE MCQs

🔵 PHYSICS (1–35)

🟠 CHEMISTRY (36–70)

🟢 BIOLOGY (71–100)

📘 CLASS 10 SCIENCE

🎯 50 LONG ANSWER – 4 POINTS FORMAT

🔵 PHYSICS (1–15)

1. Laws of Reflection

2. Image Formation by Concave Mirror (Object beyond C)

3. Refraction of Light

4. Power of Lens

5. Ohm’s Law

6. Electric Power

7. Electric Motor

8. Magnetic Field Lines

9. Human Eye

10. Myopia

11. Hypermetropia

12. Heating Effect of Current

13. Domestic Electric Circuit

14. Scattering of Light

15. Electric Generator

🟠 CHEMISTRY (16–32)

16. Combination Reaction

17. Decomposition Reaction

18. Displacement Reaction

19. Corrosion

20. pH Scale

21. Ionic Bond

22. Covalent Bond

23. Properties of Metals

24. Properties of Non-metals

25. Carbon Compounds

26. Homologous Series

27. Ethanol

28. Ethanoic Acid

29. Soap Cleansing Action

30. Periodic Table

31. Oxidation

32. Reduction

🟢 BIOLOGY (33–50)

33. Photosynthesis

34. Human Heart

35. Respiration

36. Excretion

37. Nervous System

38. Endocrine System

39. Reproduction

40. Mendel’s Monohybrid Cross

41. Dihybrid Cross

42. Food Chain

43. Ozone Layer

44. Biodegradable Substances

45. Non-biodegradable Substances

46. Plant Hormones

47. Pollination

48. Fertilisation

49. Reflex Action

50. Ecosystem

🔵 PHYSICS DIAGRAMS (1–10)

1. Ray Diagram – Concave Mirror (Object Beyond C)

2. Ray Diagram – Convex Mirror

3. Ray Diagram – Convex Lens (Object Between F and 2F)

4. Ray Diagram – Concave Lens

5. Human Eye Structure

6. Correction of Myopia

7. Correction of Hypermetropia

8. Electric Circuit (Ohm’s Law Setup)

9. Magnetic Field Lines Around Bar Magnet

100 Most Important ONE WORD Questions with Answers
(Physics + Chemistry + Biology | Final Revision)