Chemistry Gk Quiz For SSC CGL,Railway Ntpc,CHSl Exams

1. If a non-metal is added to the interstitial sites of a metal, then the metal becomes?

A) Less tensile

B) Less malleable

C) Softer

D) None of these

Answer: B

2. Which of the following elements does not show variable oxidation states?

A) Iron

B) Titanium

C) Copper

D) Zinc

Answer: D

3. The atomic number (Z) of an element is 25. In its ground state how many electrons are present in the N shell?

A) 2

B) 3

C) 13

D) 15

Answer: A

4. Transition metals mostly are?

A) Paramagnetic

B) Diamagnetic

C) Both paramagnetic and diamagnetic

D) Neither paramagnetic nor diamagnetic

Answer: A

5. The metal used for making air crafts and rockets is?

A) Lead

B) Aluminum

C) Nickel

D) Copper

Answer: B

6. Which of the following metals has least melting point?

A) Gold

B) Silver

C) Mercury

D) Copper

Answer: C

7. The chemical name of hypo commonly used in photography is?

A) Sodium thiosulphate

B) Silver nitrate

C) Sodium nitrate

D) Silver iodide

Answer: A

8. Best quality steel is manufactured by using?

A) Crucible process

B) Electrical process

C) Bass ember’s process

D) Siemens martin’s method

Answer: B

9. Tempered steel is?

A) Hard and brittle

B) Soft and malleable

C) Very soft

D) Neither so hard nor so brittle

Answer: D

10. Oxidation state of iron in hemoglobin is?

A) +2

B) +3

C) 0

D) -2

Answer: A