Oxides of Sulphur

Q.

How will you convert benzene into aniline?

Q. In which pair of ions, both the species contain a S-S bond?

1. $S_2{O}_7^{2-},S_2{O}_3^{2-}$
2. $S_4{O}_6^{2-},S_2{O}_3^{2-}$
3. $S_2{O}_7^{2-},S_2{O}_8^{2-}$
4. $S_4{O}_6^{2-},S_2{O}_7^{2-}$

Q. The valency factor of $N{a}_{2}C{O}_3$ in the given reaction is $\underset{Base}{N{a}_{2}C{O}_3}+\underset{Acid}{HCl}\to NaHC{O}_3+NaCl$

1. 2
2. 1
3. 2
4. None of the above

Q.

How many types of peroxide are there?

Q.

A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Q. The oxidation states of transition metal atoms in $K_{2}C{r}_2{O}_7,$ $KMn{O}_4$ and $K_{2}Fe{O}_4,$ respectively, are $x,yandz.$ The sum of $x,y$ and $z$ is:

Q.

Benzaldehyde reacts with Ammonia to form

1. Urotropine

2. Hydrobenzamide

3. Ammonium chloride

4. Benzaldehyde ammonium

Q.

How does pH Affect Redox Potential?

Q. Which of the following is incorrect regarding smog?

1. Classical smog occurs in cold and humid climate and is reducing in nature
2. Photochemical smog occurs in warm, dry and sunny climate and it is oxidizing in nature
3. Major constituent of photochemical smog is $S{O}_2$
4. Classical smog is a mixture of smoke, fog and $S{O}_2$

Q. Mark the incorrect statement about bleaching action of $C{l}_2$ and $S{O}_2$:

1. Bleaching of flowers by chlorine is permanent.
2. After bleaching with $S{O}_2$ the colour of flowers returns.
3. $C{l}_2$ bleaches coloured material by oxidation.
4. $S{O}_2$ is reduced when it bleaches coloured material.

Q. What is dry hydrogen chloride?

Q.

${\mathrm{H}}_2{\mathrm{O}}_2$ cannot oxidise:

1. ${\mathrm{O}}_3$

2. $\mathrm{Kl}/\mathrm{HCl}$

3. $\mathrm{PbS}$

4. ${\mathrm{Na}}_2{\mathrm{SO}}_3$

Q.

H₂O₂ acts as what when reacting with ozone?

Q.

Which furnace is used for roasting?

Q.

Most acidic oxide among the following is?

1. ${\mathrm{NO}}_2$

2. ${\mathrm{P}}_2{\mathrm{O}}_5$

3. ${\mathrm{Cl}}_2{\mathrm{O}}_7$

4. ${\mathrm{Cl}}_2\mathrm{O}$

Q.

Name the drying agent used for purifying hydrogen chloride gas.

Q. Which of the following reaction does not represent a roasting method?

1. $2ZnS\left(s\right)+3O_2\stackrel{\Delta }{\to }2ZnO\left(s\right)+2S{O}_2\left(g\right)$
2. $2PbS\left(s\right)+3O_2\stackrel{\Delta }{\to }2PbO\left(s\right)+2S{O}_2\left(g\right)$
3. $2C{u}_{2}S\left(s\right)+3O_2\stackrel{\Delta }{\to }2C{u}_{2}O\left(s\right)+2S{O}_2\left(g\right)$
4. None of the above

Q. Dithionic acid, thiosulphuric acid and dithionous acid contain $x,y$ and $z$ number of $\pi$ bonds respectively. Then $x+y^2+z^2$ is

Q.

What is the colour of lead monoxide?

Q. Which of the following statement(s) is/are incorrect:

1. A sink of $S{O}_2$ pollutant is $O_3$ in the atmosphere
2. FGD is a process of removing $N{O}_2$ from atmosphere
3. $N{O}_x$ in fuel gases can be removed by alkaline scrubbing
4. The catalyst used to convert $CC{l}_4$ to $C{F}_4$ by HF is $Sb{F}_5\cdot$

Q. A solution of colourless salt 'S' on boiling with excess $NaOH$ produces a non-flammable gas. The evolution of the gas ceases after sometime. Upon addition of $Zn$ dust to the same solution, the gas is evolved again. The colourless salt(s) 'S' can be:

1. $N{H}_{4}N{O}_3$
2. $N{H}_{4}N{O}_2$
3. $N{H}_{4}Cl$
4. $(N{H}_4{)}_{2}S{O}_4$

Q. Which of the following is incorrect about hypophosphorous acid?

1. It is also called phosphonic acid
2. The oxidation state of phosphorus is $+1$
3. It is monobasic
4. It is represented by the formula $H_{3}P{O}_2$

Q. What do you observe when an ammonium salt is heated with caustic soda solution? Write the word equation.

Q.

Give reason why sulfur dioxide is used as an antichlor.

Q.

Which acid is formed when \(SiF_4\) reacts with water?

1. H₂SO₄

2. H₂SiF₆

3. H₂SiF₄

4. None of these

Q.

Write the name of the compound H₂SO₃

Q.

Give the reactions involved in the formation of acid rain.

Q.

Name the following:
The process causing an undesirable change in the environment.

Q. Following type of non-ionic detergents are present in liquid detergents, emulsifying agents and wetting agents. Label the hydrophilic and hydrophobic parts in the molecule. Identify the functional group(s) present in the molecule.

Q.

When zinc metal reacts with sodium hydroxide solution on heating, the gas evolved:

1. Turns lime water milky

2. Supports combustion

3. Burns with a pop sound

4. Has a pungent odor.