(Antonyms) Part – B General Knowledge (Solved Paper 2024 – II) (51 to 100)

Total Questions: 50

11. The chemical reaction:

2AgCl (s) → 2Ag(s) + Cl₂(g)
takes place

Correct Answer: (b) in sunlight
Solution:The chemical reaction 2AgCl(s) → 2Ag(s) + Cl₂(g) is called photochemical decomposition reaction. In this reaction silver chloride is exposed in the presence of sunlight, it decomposes into silver and chlorine gas (Cl₂).

12. Which one among the following is commonly used as an 'anti-skinning agent' in paints?

Correct Answer: (d) Polyhydroxy phenol
Solution:Polyhydroxy phenols are used in paint as anti-skinning agents. They prevent the formation of a skin or crust on the surface of the paint when exposed to air.

13. Two resistance of 5-0 Ω and 7-0 Ω are connected in series and the combination is connected in parallel with a resistance of 36-0 Ω. The equivalent resistance of the combination of three resistors is

Correct Answer: (c) 9-0 Ω
Solution:

14. Shown in the figure are two hollow cubes C₁ and C₂ of negligible mass partially filled (depicted by darkened area) with liquids of densities p₁ and p₂, respectively, floating in water (density ρ). The relationship between ρ₁, ρ₂ and ρ is

Correct Answer: (c) ρ₁<ρ₂ <ρw
Solution:(c)

15. An astronaut whose weight on the Earth is 600 N experiences weightlessness on International Space Station orbiting around the Earth. It means that

Correct Answer: (b) normal reaction of the space-station floor on the astronaut is zero
Solution:

N = 0 ⇒ This condition is called weight lessness

16. Which of the following statements give characteristics of contact forces?

  1. It appears between an object when it is in contact with some other object
  2. It satisfies the third law of motion
  3. It may appear between a pair of solid and fluid

Select the answer using the code given below:

Correct Answer: (d) 1, 2 and 3
Solution:There are following characteristics of contact forces:

(i) It comes into picture when one body is in contact with another body.
(ii) It is action reaction pair. So, it satisfies Newton's third law of motion.
(iii) It can appear between two bodies in contact like solid with solid, solid with liquid, liquid with liquid.

17. Which one among the following figures correctly represents the ray diagram? (Consisder the lens to be thin)

Correct Answer: (d)
Solution:(i) When a ray of light passing through fof a converse lens, then it becomes parallel to principal axis after refraction.

(ii) When a ray of light passes through 2f of one side of a converse lens, then it also passes through 2f on the other side of the lens after refraction.

18. Lightning is due to

Correct Answer: (d) The induction of positive charge on the ground below the negative charge at the base of the cloud
Solution:Lightening is caused by electrostatic induction. In this process, there is an induction of positive charge on the ground just below the negative charge at the base of the cloud.

19. In which one among the following situations, the blub ⊗ would glow the most? (Consider all batteries are the same)

Correct Answer: (d)
Solution:

20. Which one among the following diagrams may correctly represent the motion of a skydiver during a jump?

Correct Answer: (d)
Solution:When a skydriver jumps, then he first accelerated and after sometime it acquires terminal speed. At terminal speed, the sky driver opens parachute and a again acquires second terminal speed after sometime followed by deceleration and finally reaches the ground. The speed-time graph of the skydriver during his jump is given below