Question 1

Q1. Which of the following metals can displace copper from copper sulphate solution?

Accepted Answer

Option C: Zinc. Zinc is more reactive than copper and can displace it from copper sulphate solution according to the reactivity series.

Question 2

Q2. Why does a person with hypermetropia use convex lenses?

Accepted Answer

Option C: To converge light rays before they enter the eye. In hypermetropia, images form behind the retina. Convex lenses converge rays so the image forms correctly on the retina.

Question 3

Q3. Which part of the brain controls voluntary actions and intelligence?

Accepted Answer

Option C: Cerebrum. The cerebrum controls thinking, memory, intelligence, reasoning, and voluntary activities.

Question 4

Q4. Which statement about exothermic reactions is correct?

Accepted Answer

Option C: Energy is released during reaction. Exothermic reactions release heat energy to the surroundings, increasing surrounding temperature.

Question 5

Q5. In the human alimentary canal, maximum absorption of digested food occurs in:

Accepted Answer

Option B: Small intestine. The small intestine has villi that increase surface area for efficient absorption of nutrients.

Question 6

Q6. A student places a potted plant near a window and observes that the plant bends toward sunlight after a few days. This response is called:

Accepted Answer

Option C: Phototropism. Plants grow toward light due to phototropism caused by unequal distribution of auxin hormone.

Question 7

Q7. An electric iron of power 1000 W operates at 220 V. The current drawn by the iron is:

Accepted Answer

Option C: 4.5 A. Using P = VI, I = P/V = 1000/220 ≈ 4.5 A

Question 8

Q8. A student adds sodium hydroxide solution to copper sulphate solution. A blue precipitate forms. The precipitate is:

Accepted Answer

Option B: Copper hydroxide. Copper sulphate reacts with sodium hydroxide to form blue copper hydroxide precipitate.

Question 9

Q9. A person touches a hot utensil accidentally and immediately pulls back the hand. This action is controlled by:

Accepted Answer

Option B: Reflex arc. Reflex actions are rapid automatic responses controlled mainly through the spinal cord.

Question 10

Q10. A bulb rated 60 W and another rated 100 W are connected separately to the same voltage source. Which bulb has greater resistance?

Accepted Answer

Option B: 60 W bulb. Using R = V²/P, resistance is inversely proportional to power. Lower power bulb has higher resistance. (Tricky question)

Question 11

Q11. Drinking water stored in copper vessels is considered safer because copper:

Accepted Answer

Option C: Has antimicrobial properties. Copper inhibits growth of microorganisms, helping purify stored water naturally.

Question 12

Q12. Assertion (A): All acids contain hydrogen. Reason (R): Acids release H ⁺ ions in aqueous solution.

Accepted Answer

Option A: Both A and R are true and R is correct explanation of A. Acids show acidic properties due to release of hydrogen ions in water.

Question 13

Q13. Assertion (A): Convex mirrors are used as rear-view mirrors. Reason (R): Convex mirrors provide a wider field of view.

Accepted Answer

Option A: Both A and R are true and R is correct explanation of A. Convex mirrors form erect diminished images and allow drivers to see a larger area behind them.

Question 14

Q14. Case Study: A student tested the pH of four substances using universal indicator. The results are: • Substance P → pH 2 • Substance Q → pH 7 • Substance R → pH 10 • Substance S → pH 5 Which substance is most basic?

Accepted Answer

Option C: R. Higher pH values indicate stronger basic nature. pH 10 is the most basic among the given substances.

Question 15

Q15. Case Study: In an experiment, a ray of light passes from air into glass. The ray bends toward the normal. This happens because:

Accepted Answer

Option C: Speed of light decreases in glass. Light slows down in a denser medium like glass, causing refraction toward the normal.

Question 16

Q16. A student claims that all compounds containing oxygen are acidic. Which option disproves the statement?

Accepted Answer

Option C: MgO. Magnesium oxide is a basic oxide despite containing oxygen. (Conceptual trap question)

Question 17

Q17. Which of the following organisms occupies the highest trophic level?

Accepted Answer

Option C: Tiger. Tiger is the top carnivore and occupies the highest trophic level in the food chain.

Question 18

Q18. A current of 2 A flows through a resistor for 5 minutes. The charge passed is:

Accepted Answer

Option C: 600 C. Q = I × t = 2 × (5 × 60) = 600 C

Question 19

Q19. A carbon compound has single covalent bonds only and shows substitution reactions mainly. The compound is MOST likely:

Accepted Answer

Option C: Methane. Saturated hydrocarbons like methane contain only single bonds and commonly undergo substitution reactions.

Question 20

Q20. A ray passing through the optical centre of a convex lens emerges:

Accepted Answer

Option B: Along same straight line. A ray through the optical centre passes undeviated because refraction at both lens surfaces balances out. (High-frequency exam concept)

Mock Test 02 Performance Solutions

Detailed Question Analysis

Q1. Which of the following metals can displace copper from copper sulphate solution?

Q2. Why does a person with hypermetropia use convex lenses?

Q3. Which part of the brain controls voluntary actions and intelligence?

Q4. Which statement about exothermic reactions is correct?

Q5. In the human alimentary canal, maximum absorption of digested food occurs in:

Q6. A student places a potted plant near a window and observes that the plant bends toward sunlight after a few days. This response is called:

Q7. An electric iron of power \(1000\,\mathrm{W}\) operates at \(220\,\mathrm{V}\). The current drawn by the iron is:

Q8. A student adds sodium hydroxide solution to copper sulphate solution\(.\,\mathrm{A}\) blue precipitate forms. The precipitate is:

Q9. A person touches a hot utensil accidentally and immediately pulls back the hand. This action is controlled by:

Q10. A bulb rated \(60\,\mathrm{W}\) and another rated \(100\,\mathrm{W}\) are connected separately to the same voltage source. Which bulb has greater resistance?

Q11. Drinking water stored in copper vessels is considered safer because copper:

Q12. Assertion (A): All acids contain hydrogen. Reason (R): Acids release H ⁺ ions in aqueous solution.

Q13. Assertion (A): Convex mirrors are used as rear-view mirrors. Reason (R): Convex mirrors provide a wider field of view.

Q14. Case Study: A student tested the pH of four substances using universal indicator. The results are: • Substance P \(\rightarrow\) p\(\mathrm{H_2}\) • Substance Q \(\rightarrow\) pH 7 • Substance R \(\rightarrow\) pH 10 • Substance S \(\rightarrow\) pH 5 Which substance is most basic?

Q15. Case Study: In an experiment, a ray of light passes from air into glass. The ray bends toward the normal. This happens because:

Q16. A student claims that all compounds containing oxygen are acidic. Which option disproves the statement?

Q17. Which of the following organisms occupies the highest trophic level?

Q18. A current of \(2\,\mathrm{A}\) flows through a resistor for 5 minutes. The charge passed is:

Q19. A carbon compound has single covalent bonds only and shows substitution reactions mainly. The compound is MOST likely:

Q20. A ray passing through the optical centre of a convex lens emerges:

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Mock Test 02 Performance Solutions

Detailed Question Analysis

Q1. Which of the following metals can displace copper from copper sulphate solution?

Q2. Why does a person with hypermetropia use convex lenses?

Q3. Which part of the brain controls voluntary actions and intelligence?

Q4. Which statement about exothermic reactions is correct?

Q5. In the human alimentary canal, maximum absorption of digested food occurs in:

Q6. A student places a potted plant near a window and observes that the plant bends toward sunlight after a few days. This response is called:

Q7. An electric iron of power \(1000\,\mathrm{W}\) operates at \(220\,\mathrm{V}\). The current drawn by the iron is:

Q8. A student adds sodium hydroxide solution to copper sulphate solution\(.\,\mathrm{A}\) blue precipitate forms. The precipitate is:

Q9. A person touches a hot utensil accidentally and immediately pulls back the hand. This action is controlled by:

Q10. A bulb rated \(60\,\mathrm{W}\) and another rated \(100\,\mathrm{W}\) are connected separately to the same voltage source. Which bulb has greater resistance?

Q11. Drinking water stored in copper vessels is considered safer because copper:

Q12. Assertion (A): All acids contain hydrogen. Reason (R): Acids release H ⁺ ions in aqueous solution.

Q13. Assertion (A): Convex mirrors are used as rear-view mirrors. Reason (R): Convex mirrors provide a wider field of view.

Q14. Case Study: A student tested the pH of four substances using universal indicator. The results are: • Substance P \(\rightarrow\) p\(\mathrm{H_2}\) • Substance Q \(\rightarrow\) pH 7 • Substance R \(\rightarrow\) pH 10 • Substance S \(\rightarrow\) pH 5 Which substance is most basic?

Q15. Case Study: In an experiment, a ray of light passes from air into glass. The ray bends toward the normal. This happens because:

Q16. A student claims that all compounds containing oxygen are acidic. Which option disproves the statement?

Q17. Which of the following organisms occupies the highest trophic level?

Q18. A current of \(2\,\mathrm{A}\) flows through a resistor for 5 minutes. The charge passed is:

Q19. A carbon compound has single covalent bonds only and shows substitution reactions mainly. The compound is MOST likely:

Q20. A ray passing through the optical centre of a convex lens emerges:

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