Study of Compounds - Ammonia — Chemistry STD 10 — Question

An acid is a compound which, when dissolved in water gives ______ ( hydronium / hydroxide) ions as the only ______ (positive/negative) ions.

Fill in the blank :
Pure water consists entirely of …………..(ions,molecules)

Vinegar contains __________ acid.

All metallic chlorides on heating with conc. ________ liberate hydrogen chloride gas. [nitric acid/sulphuric acid]

Ammonium hydroxide is a __________ base.

Conc. sulphuric acid is used in the laboratory preparation of nitric acid, as sulphuric acid is ________. [most volatile/least volatile]

The temperature at which all molecular motion ceases is____________

Sodium zincate and water is obtained on reaction of __________ with concentrated caustic soda.

If the volume of nitrogen gas is doubled while keeping the temperature constant, the number of moles of nitro- gen gas will be ________ (two/three/four) times the initial number of moles.

Pure aluminium oxide is dissolved in ________ [cryolite/thermite] to make it a conducting solution.