general Chemistry test questions and answers For UPSC | SSC | Rail | RRB | State PSC P12

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Page 12

90107111. The common name for the compound having formal NaOH is

A

Caustic soda

B

Caustic potash

C

Soda ash

D

Sodium hydroxide

A

Correct Answer: A. Caustic soda

90063112. Metal are good conductors, be-cause

A

they contain free electrons

B

the molecules in them are very close to each other

C

the molecules in them collide very freely

D

they contain reflecting surface

A

Correct Answer: A. they contain free electrons

90140113. The purity of gold is expressed in carats. The purest form of gold is

A

24 carats

B

99.6 carats

C

91.6 carats

D

22 carats

A

Correct Answer: A. 24 carats

90162114. What material is used to make an electric heater coil?

A

Copper.

B

Iron

C

Silver

D

Nichrome

D

Correct Answer: D. Nichrome

90148115. Uranium eventually decays into a stable isotope of -

A

Radium

B

Thorium

C

Lead

D

Polonium

C

Correct Answer: C. Lead

90089116. Soap is prepared by boiling caustic soda with

A

Alcohol

B

Kerosene oil

C

Glycerine

D

Fats

D

Correct Answer: D. Fats

90058117. In nuclear reactors, graphite is used as a/an

A

fuel

B

lubricant

C

moderator

D

insulator

C

Correct Answer: C. moderator

90061118. Iodized salt is beneficial for

A

lowering of blood pressure

B

prevention of dehydration

C

thyroid function

D

salivary glands

C

Correct Answer: C. thyroid function

90100119. The anode in a dry cell consists of

A

Copper

B

Zinc

C

Cadmium

D

Graphite

B

Correct Answer: B. Zinc

90141120. The radioactive element used in heart pacemakers is

A

Uranium

B

Deuterium

C

Plutonium

D

Radium

A

Correct Answer: A. Uranium

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