Chemistry Gk - 2

Question: 6

The percentage of nickel in nickel alloy for making radio valves is

(A) 2%

(B) 20%

(C) 36%

(D) 46%

Question: 7

The setting of plaster of paris takes place due to

(A) Hydration

(B) Dehydration

(C) Reduction

(D) Oxidation

Question: 8

Oxides of non metals are

(A) Amphoteric

(B) Acidic

(C) Basic

(D) Neutral

Question: 9

The ore of mercury is

(A) Calamine

(B) Cinnabar

(C) Haematite

(D) Galena

Question: 10

Glacial acetic acid contains

(A) 10% acetic acid

(B) 50% acetic acid

(C) 90% acetic acid

(D) 100% acetic acid