Chemistry - Mock Test 46

Question 451

Which of the Carbon Compounds is used as fire extinguisher ?

A) CS₂ B) CHCl₃ C) CH₃Cl D) CCl₄

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Question 452

The macro-nutrient provided by inorganic fertilization are ?

A) C, Fe, B B) C, N, P C) N, P, K D) Mg, Zn, Fe

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Question 453

Which one of the following is not used to dope a semiconductor ?

A) Al B) B C) In D) Au

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Question 454

Which of the following gases is used for refrigeration?

A) Freon B) Chlorine C) Carbon dioxide D) Hydrogen

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Question 455

The acid use in lead storage cells is?

A) phosphoric acid B) hydrochloric acid C) nitric acid D) sulphuric acid

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Question 456

The element common to all acids is?

A) hydrogen B) carbon C) sulphur D) oxygen

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Question 457

Aluminium is obtained by the electrolysis of pure Al2O3 dissolved in?

A) Bauxite B) Cryolite C) Feldspar D) Alumina

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Question 458

Photoelectric effect is?

A) an instantaneous process B) delayed process C) emission of protons D) emission of neutrons

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Question 459

When a particle and an antiparticle come in contact with each other, they?

A) repell each other B) annihilate each other C) go undisturbed D) spin about a common axis

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Question 460

In nuclear reactions, there is conservation of ?

A) mass only B) momentum only C) energy only D) mass, energy and momentum

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