[VSQ]Chemistry Q&A For All Competitive Exam||Set 06

Chemistry Q&A For All Competitive Exam

📗Q.1

Nessler's reagent is used for the detection of -

Ammonium ions or Ammonia

📗Q.2

A Dewar's flask is used to store

Liquid Air.

📗Q.3

Laughing gas, is chemically called

Nitrous Oxide

📗Q.4

Temporary hardness is caused due to the presence of

bicarbonate salt.

📗Q.5

The purest form of water is

Distilled water.

📗Q.6

When steam is passed over heated coke

Water gas is produced.

📗 Q.7

Which type of glass has the smallest co-efficient of thermal expansion?

Pyrex glass/Borosilicate glass.

📗Q.8

Red lead is

lead tetraoxide

📗Q.9

The chemical name of phosgene is

Carbonyl Chloride

📗Q.10

For bleaching silk and fabrics, the compound used is

Sulphur-dioxide

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