identification of gases

A gas which changes cobalt chloride paper from blue to pink

• Water -vapour

• Hydrogen gas

• Oxygen

• Carbon -dioxide

A gas which burns which turns lime water milky but has no effect on acidified KMnO4

• Water -vapour

• Hydrogen gas

• Oxygen

• Carbon -dioxide

A colourless odurless gas neutral to litmus and relits glowing splint

• Water -vapour

• Hydrogen gas

• Oxygen

• Carbon -dioxide

A gas which rekindles glowing splinter and turns pyrogallol solution brown

• Water -vapour

• Hydrogen gas

• Oxygen

• Carbon -dioxide

A greenish-yellow gas which turns Iodide -starch paper blue black

• Chlorine

• Hydrogen sulphide

• Hydrogen chloride

• Nitrogen dioxide

A pungent gas which gives white dense fumes when a glass rod is dipped into ammonia and brought close to the gas.

• Chlorine

• Hydrogen sulphide

• Hydrogen chloride

• Nitrogen dioxide

A gas which turns moist red litmus blue and gives white dense fumes when bought next to HCl .

• Chlorine

• Hydrogen sulphide

• Hydrogen chloride

• Ammonia

A reddish brown gas which liberates violet vapours of Iodine when reacted with KI.

• Chlorine

• Hydrogen sulphide

• Hydrogen chloride

• Nitrogen dioxide

Rotten gas odour which turns lead acetate silvery black

• Chlorine

• Hydrogen sulphide

• Hydrogen chloride

• Nitrogen dioxide

The gas that forms curdy white ppt on passage through AgNO3 solution

• Carbon-dioxide

• Chlorine

• Hydrogen chloride

• Nitrogen dioxide