Oxides of Nitrogen

Q.

The crystals of ferrous sulphate on heating give ________.

Q.

What happens when a piece of Zinc metal is added to Copper sulphate solution?

Also, write the balanced chemical equation if the reaction occurs.

Q. Which of the following compounds will react with $NaHC{O}_3$ solution to give sodium salt and carbon dioxide?

1. Acetic acid
2. n -hexanol
3. Phenol
4. Both (a) and (c)

Q. Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

1. $N_{2}O$
2. $N{O}_2$
3. $N_2{O}_5$
4. $NO$

Q.

Match List-1 with List-2.

Column 1	Column 2
${\mathrm{Ne}}_2$	1
${\mathrm{N}}_2$	2
${\mathrm{F}}_2$	0
${\mathrm{O}}_2$	3

Q.

When crystals of lead nitrate are heated strongly in a dry test tube

1. Crystals immediately melt

2. Brown residue is left

3. White fumes appear in the tube.

4. Yellow residue is left

Q. Acid A is prepared from white phosphorus on reaction with alkali, while acid B is prepared from red phosphorus on reaction with alkali. If the total number of P – OH linkage in both molecules (one molecule each) is X and number of P – H bonds is Y, then the value of (X + Y) is

Q.

How do you write the formula for potassium metal?

Q.

Give the chemical name and formula of the substance formed as a brown ring in the test for nitrate radical.

Q.

Which of the following will form superoxide?

1. K

2. Na

3. Mg

4. Ca

Q.

If you burn anything for example - cardboard, paper, or plastic it becomes black but the sun is burning all the time so, why is it yellowish-golden?

Q.

Sodium does not normally react with

1. Ammonia Gas

2. But-2-yne

3. Ethyne

4. Propyne

Q.

Write balanced equation and name the product formed when cupric oxide reacts with nitric acid.

Q.

Name of the gas/gases evolved when crystals of ferrous sulfate are heated strongly?

Q.

What happens when the Iron is kept exposed to a humid atmosphere? Explain the process by writing the chemical equations

Q.

An alloy of zinc and copper is dissolved in dilute hydrochloric acid. Hydrogen gas is evolved. In this evolution of gas

1. only zinc reacts with dilute hydrochloric acid.

2. only copper reacts with dilute hydrochloric acid.

3. both zinc and copper react with dilute hydrochloric acid.

4. only copper reacts with water.

Q.

Give reasons why:

Aluminium cannot be extracted by the reduction of its ores.

Q. Which of the following condition in drinking water cause methemoglobinemia ?

1. > 50 ppm of nitrate
2. > 50 ppm of chloride
3. > 100 ppm of sulphate
4. > 50ppm of lead

Q.

Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

1. Concentrated hydrochloric acid emits strongly smelling HClgas all the time

2. Oxygen in air reacts with the emitted HClgas to form a cloud of chlorine gas

3. Strong affinity of HClgas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke

4. Due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence the cloud

Q. Excess of which of the following in drinking water is the cause of 'blue baby' syndrome?

1. Nitrates
2. Sulphates
3. Fluorides
4. Iron

Q.

What do ${\mathrm{HNO}}_2$decomposes into?

Q.

Name a nitrate that does not yield nitrogen dioxide on heating.

Q.

Is nitrogen hot or cold?

Q. The nitrogen oxides that contain N – N bond(s) is:

1. $N_{2}O,N_2{O}_3,N_2{O}_4$
2. $N_2{O}_5,N_{2}O,N_2{O}_3$
3. $N_2{O}_5,N_{2}O,N_2{O}_3,N_2{O}_4$
4. $N_{2}O,N_2{O}_5$

Q.

A solution of copper sulphate cannot be stored in an aluminum vessel. Give a reason.

Q. $N_2{O}_4$ is a mixed anhydride because it:

1. Decomposes into two oxides of nitrogen
2. Is a mixture of $N_2{O}_3$ and $N_2{O}_5$
3. Reacts with water to form two acids
4. Reacts with water to give nitric acid

Q.

20 mL of nitric oxide combines with 10 mL of oxygen at STP to give $N{O}_2$. The final volume will be?

Q. On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives A and B while its reaction with $HCl$ produces B and C. A, B and C are, respectively

Q. In which one of the following oxides of nitrogen, both nitrogen atoms are not directly linked to each other?

1. $N_2{O}_4$
2. $N_2{O}_3$
3. $N_2{O}_5$
4. None of the above

Q. The nitrogen oxide(s) that contain(s) $N-N$ bond(s) is/are

1. $N_{2}O$
2. $N_2{O}_3$
3. $N_2{O}_4$
4. $N_2{O}_5$