quiz for class 10 science For UPSC | SSC | Rail | RRB | State PSC P17

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Page 17

90180161. Which of the following is not a nucleon?

A

Proton

B

Neutron

C

Electron

D

Positron

D

Correct Answer: D. Positron

90108162. The constituents of automobile exhaust that can cause cancer is/are

A

Oxides of nitrogen

B

Carbon monoxide

C

Polycyclic hydrocarbons

D

Lead

D

Correct Answer: D. Lead

90071163. Nuclear energy is a mineral-based energy source. It is derived from

A

uranium

B

thorium

C

plutonium

D

All of the above

A

Correct Answer: A. uranium

90023164. By which organic compound all the oils are known ?

A

- Carbohydrate

B

Protein

C

Hydrocarbon

D

Ester

C

Correct Answer: C. Hydrocarbon

90052165. Heat resistant variety of glass is

A

Pyrex glass

B

Hard glass

C

Flint glass

D

None of these

C

Correct Answer: C. Flint glass

90207166. Who discovered the atom bomb?

A

Madam Curie

B

Pierre Curie

C

Otto Hahn

D

Albert Einstein

C

Correct Answer: C. Otto Hahn

90121167. The lustre of the metals is because of

A

high density, due to closed packing of atoms

B

high polish

C

reflection of light due to the presence of free electrons

D

absorption of light due to the presence of cavities

C

Correct Answer: C. reflection of light due to the presence of free electrons

90014168. Aqua regia is a 1:3 mixture, by volume of

A

conc.(concentrated) nitric acid and conc. hydrochloric acid

B

conc. hydrochloric acid and conc. nitric acid

C

cone. nitric acid and conc. sulphuric acid

D

conc. sulphuric acid and conc. nitric acid

A

Correct Answer: A. conc.(concentrated) nitric acid and conc. hydrochloric acid

90099169. The addition of gypsum to port-land cement helps in :

A

increasing the strength of cement

B

rapid setting of cement

C

preventing rapid setting of cement

D

reduction in the cost of cement

C

Correct Answer: C. preventing rapid setting of cement

90094170. Table salt gets moist during the rainy season because

A

sodium chloride is by

B

sodium chloride is deliquescent

C

sodium chloride contains some quantity of sodium iodide

D

sodium chloride contains hygroscopic impurities like magnesium chloride

D

Correct Answer: D. sodium chloride contains hygroscopic impurities like magnesium chloride

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