Working with Gases in the Lab

Oxygen supports combustion hence the best way to detect its presence is the glowing splint test.

Describe the test for oxygen gas?

Chlorine gas bleaches moist litmus paper.

Describe the test of chlorine gas with damp litmus paper?

Hydrogen cannot be collected by upward displacement of air.

_____ gas can be prepared in the lab by the reaction of manganese(IV) oxide with hydrogen peroxide.

_____ gas can be prepared in the lab by the reaction of granulated zinc with dilute hydrochloric acid.

Nessler's reagent is used to test for _____.

Name the colourless gas that evolves when potassium reacts with water. (Hydrogen / Oxygen)

The catalyst used in the preparation of oxygen from hydrogen peroxide is _____. (Manganese dioxide / Calcium oxide)

Fractional distillation is a procedure employed to separate mixtures of liquids that have similar boiling points.

Ammonium chloride $\left[{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{s}\right)\right]$ is heated in a test tube. Vapours are brought in contact with a red litmus paper, which changes to blue and then to red. It is because of

Ammonia reacts with Nessler's reagents to give a precipitate due to the formation of