Hydrogen questions | form two Chemistry

(a) Draw a labelled diagram for the preparation of hydrogen gas using dilute hydrochloric acid and zinc.

(b) Give four properties of hydrogen.

Hydrogen gas can be collected by downward delivery because:
A. it burns in air with a pop-sound
B. it is more soluble than air
C. it is lighter than air
D. it can fill balloons

Why is Hydrogen gas used in filling balloons?

The common property for all carbonates and hydrogen is that they

1. are soluble in cold water
2. decompose on heating
3. are colourless chemicals
4. react with dilute nitric acid
5. are not soluble in cold water

Which method is used in the laboratory gas preparation of hydrogen?
Give reasons for your answer

What will happen when a burning splint is introduced into a gas jar containing hydrogen gas?

Which of the following statements is not true about hydrogen gas?

1. Is a neutral gas, almost insoluble in water
2. Is a reducing agent
3. Burns in air to form steam
4. Diffusses more rapidly than carbondioxide
5. Is prepared by the action of dilute nitric acid on zinc metal

Which of the following statement is true about water gas?
A It is poisonous.
B Contains hydrogen.
C Is the same as biogas.
D Contains hydrogen and nitrogen.
E Contains carbon monoxide and hydrogen.

Gas “L” has the following properties: It is highly flammable, readily combines with other elements, readily reacts with other chemical substances and is a strong reducing agent.
(a) Name the gas “L”
(b) What is the method used to collect gas “L” in the laboratory? Give a reason.
(c) Give four uses of gas “L”.

Hydrogen gas can be collected by downward delivery because:
A. it burns in air with a pop-sound
B. it is more soluble than air
C. it is lighter than air
D. it can fill balloons