Metals Reaction with Acid

Q.

When $\mathrm{Zn}$ granules are added to concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$, which of the following reactions does not takes place?

1. $\mathrm{Zn}$ gets oxidized

2. $\mathrm{S}$ gets reduced

3. ${\mathrm{H}}_2$ is evolved

4. ${\mathrm{H}}_2\mathrm{O}$ is formed

Q. Metal reacts with nitric acid to form __________ and __________.

1. Salt and water
2. Salt and carbon dioxide gas
3. Salt and nitrogen oxide
4. Salt and nitrogen gas

Q.

Explain the following : Two jars of H₂ Are collected -"one burns quietly and the other does not".

Q.

An ore gives carbon dioxide on treatment with dilute acid. Identify the ore and name the process that should be used to concentrate this.

Q.

Name the gas which burns with a pop sound.

__

Q.

Which of the following is incorrect?

1. Metal + Dilute acid → Salt + Hydrogen.

2. Ionic compounds have high melting and boiling points.

3. Hydrogen gas is evolved when copper reacts with nitric acid.

4. Ionic compounds are generally brittle and break into pieces when pressure is applied.

Q. a. What happens when copper carbonate is heated strongly?
b. What happens when $C{l}_2$ gas is passed through the $KI$ solution?