Ozone

Q.

Is ${\mathrm{O}}_3$ diamagnetic in nature?

Q. When a mixture of solid $NaCl$, solid $K_{2}C{r}_2{O}_7$ is heated with conc. $H_{2}S{O}_4$, orange red vapours are obtained of the compound:

1. Chromous chloride
2. Chromyl chloride
3. Chromic chloride
4. Chromic sulphate

Q.

How many oxygen atoms are represented by 0.5 moles of ozone (${\mathrm{O}}_3$)

Q.

State true or false: acetylene on ozonolysis gives glyoxal.

1. True
2. False

Q. CYCLOHEXENE ON REACTION WITH OZONE IN PRESENCE OF WATER GIVES (A) .ON FURTHER REACTING (A)WITH Ca(OH)2 AND ON HEATING IT (B) IS FORMED .(A) AND (B) ARE

Q. At 298.2 K the relationship between enthalpy of bond dissociation (in kJ ${\text{mol}}^{-1}$) for hydrogen $\left(E_H\right)$ and its isotope, deuterium $\left(E_D\right)$, is best described by

1. $E_H\simeq E_D-7.5$
2. $E_H=2E_D$
3. $E_H=\frac{1}{2}{E}_D$
4. $E_H=E_D$

Q. Why does fluorine not show a disproportionation reaction?

Q.

Write the balanced chemical equation for the reaction of action of heat on Aluminium hydroxide ?

Q.

Draw the structure of ${\mathrm{O}}_3$ and ${\mathrm{NO}}_2$.

Q.

Ozone oxidizes lead sulphide to:

1. Lead sulphate

2. Lead oxide

3. Lead nitrate

4. Lead sulphite

Q. From where does ozone come in the photochemical smog?

Q. Bond angle and bond length in ozone is ?

Q. The resonance hybrid of Ozone arises from ________ canonical forms.
___

Q. Which of the following is/are not oxidising agents?

1. $Mo{O}_3$
2. $W{O}_3$
3. $C{r}_2{O}_7^{2-}$
4. Both (a) and (b)

Q. Ozone depletion is caused by only nitric oxide - True or False?

1. True
2. False

Q. Give reasons for the following :
(i) Though nitrogen exhibits +5 oxidation state, it does not form pentahalide.
(ii) Electron gain enthalpy with negative sign of fluorine is less than that of chlorine.
(iii) The two oxygen-oxygen bond lengths in ozone molecule are identical.

Q.

13. Which of the following elements is used for the purification of surface water to make it free from germs so that it can be used for drinking purpose?

1. oxygen

2. fluorine

3. chlorine

4. carbon

Q.

Write true or false for the following statement:
“Distillation is a good method for purifying water for town supply.”

1. True
2. False

Q.

State whether the following statements are true or false.
Ozone is a triatomic molecule.

1. False
2. True

Q. Why does fluorine not show a disproportionation reaction?

Q. Which of the following liberates $O_2$ upon hydrolysis?

1. $P{b}_3{O}_4$
2. $K{O}_2$
3. $N{a}_2{O}_2$
4. $L{i}_2{O}_2$

Q. Which of the following is/are not oxidising agents in acidic medium?

1. $Mo{O}_3$
2. $W{O}_3$
3. Both (a) and (b)
4. $C{r}_2{O}_7^{2-}$

Q. $O_3$ acts as both oxidizing as well as reducing agent.

Q. Which of the following lanthanoids
show +2 oxidation state besides
the characteristic oxidation state
+3 of lanthanoids?

1. $Eu$
2. $Ce$
3. $Yb$
4. $Ho$

Q. Which of the following liberates $O_2$ upon hydrolysis?

1. $K{O}_2$
2. $N{a}_2{O}_2$
3. $L{i}_2{O}_2$
4. $P{b}_3{O}_4$

Q. Give reasons for the following:
(i) Oxygen is a gas but sulphur is a solid.
(ii) $O_3$ acts as a powerful oxidising agent.
(iii) $Bi{H}_3$ is the strongest reducing agent amongst all the hydrides of group $15$ elements.

Q. Ozone is an oxidizing and reducing agent. Explain with one example of each.

Q. Assertion :$O_3$ acts as a powerful oxidising agent. Reason: $O_3$ oxidises lead sulphide to lead sulphate and iodide ions to iodine.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. $O_3$ is used as a:

1. Germicide
2. Disinfectant
3. Sterilizing agent
4. All of the above

Q. The synthesis of ozone from dioxygen is an process.

1. endothermic
2. exothermic
3. decomposition