chemistry form 4 (gas test)

An experiment released a colourless gas which rekindles glowing wooden splinter. The gas released is........

• Carbon dioxide

• Hydrogen

• Nitrogen

• Oxygen

The gas released will .................

• Turns the lime water into cloudy

• Produce a 'pop' sound when tested with lighted wooden splinter

• Change blue litmus paper to red

• Change red litmus paper to blue

Which of the following is correct observation for the gas released?

• Turns moist blue litmus paper into red

• Turns moist red litmus paper into blue

• Greenish-yellow gas

• Pungent smell

In this experiment, name other solution that can be used to replaced acidified potassium manganate(VII) solution.

Reaction between solution X and substance Y produce a greenish-yellow gas. The gas is most possible .............

• Sulphur dioxide gas

• Chlorine gas

• Nitrogen dioxide gas

• Hydrogen chloride gas

A reaction between solution A and substance B produce a colourless gas. The gas release turns the lime water into cloudy. The gas is ........

• nitrogen dioxide

• carbon monoxide

• sulphur dioxide

• carbon dioxide

A reaction occur produce a colourless gas which turns blue litmus paper into red. The gas is most possible .................

• chlorine gas

• ammonia gas

• nitrogen dioxide gas

• hydrogen chloride gas

• sulphur dioxide