RRB GROUP D Chemistry Quiz - 27

Attempt now to get your rank among 3 students!

Question 1:

Soft soaps are the limitation of hot process because of their ____________

High alkalinity

Low alkalinity

Low solubility in water

High solubility in water

Silver articles become black after some time when exposed to air because- ?

silver gets oxidized to silver oxide

silver reacts with moist carbon dioxide in the air to form silver carbonate

silver reacts with sulfur in the air to form a coating of silver sulfide

silver reacts with nitrogen oxides in the air to form silver nitrate

Potassium nitrate is a salt and is used

In gun powder

In paints

To make soap

To make fertilizers

What is the chemical name of quartz crystals normally used in quartz clocks?

Silicon Dioxide

Germanium Oxide

A mixture of Germanium Oxide and Silicon dioxide

Sodium Silicate

“Oil of mirbane” is the most common name of which among the following?

Phenol

Toluene

Phenol phthalein

Nitro benzene