Question

Write 'T' for true and 'F' for false for the following statements.
1. The combustion of carbon is an endothermic reaction.
2. When ignited, hydrogen burns in oxygen with a 'pop'.
3. Ammonia gives white fumes with hydrogen chloride gas.
4. Hydrogen sulphide is a sweet-smelling gas.

please help..​

Answer 1

Answer:

1. F
2. T
3. T
4. F

Explanation:

1.

The combustion of carbon gives out heat energy and light energy. Thus, it is an exothermic reaction and not an endothermic reaction.

Thus, the answer is False .

2.

Hydrogen always burns with a "pop" sound. This characteristic of hydrogen is often used in laboratories to detect release of hydrogen in any chemical reaction (with safety precautions).

Thus, the answer is True .

3.

Ammonia ($\sf{NH_3}$) when reacts with Hydrogen Chloride ($\sf{HCl}$) then it produces Ammonium Chloride ($\sf{NH_4Cl}$). The white fumes are the dense Ammonium Chloride vapours.

$\boxed{\sf{NH_3(\mathcal{s}) + HCl(\mathcal{l}) \longrightarrow NH_4Cl(\mathcal{g})}}$

Thus, the answer is True .

4.

Hydrogen Sulphide ($\sf{H_2S}$) has a foul smell of rotten eggs.

Thus, the answer is False .