Sulphur Trioxide

Q. Chlorine is prepared in the laboratory by treating manganese dioxide $\left(Mn{O}_2\right)$ with aqueous hydrochloric acid according to the reaction

$4HCl\left(aq\right)+Mn{O}_2\left(s\right)\to 2H_{2}O\left(l\right)MnC{l}_2\left(aq\right)+C{l}_2\left(g\right)$

How many grams of $HCI$ reacts with $5.0g$ of manganese dioxide?

Q. In Haber's process iron oxide with small amount of $K_{2}O$ and $A{l}_2{O}_3$ is used as:

1. Catalyst
2. Promoter
3. Reagent
4. Dehydrating agent

Q. Why do the following reactions proceed differently? $P{b}_3{O}_4+8HCl⟶3PbC{l}_2+C{l}_2+4H_{2}O$ and $P{b}_3{O}_4+4HN{O}_3⟶2Pb(N{O}_3{)}_2+Pb{O}_2+2H_{2}O$

Q.

An acidic solution of hydrogen peroxide behaves as an oxidising as well as reducing agent. Illustrate it with the help of a chemical equation.

Q. Give the equation for :

Heat on sulphur with conc. sulphuric acid

Q. $N{a}_2{B}_4{O}_7+H_{2}O+HCl\to NaCl+xx\stackrel{\Delta }{\to }y\underset{\Delta }{\overset{Mg}{\to }}z$
the product 'z' in the reaction is

1. 
2. 
3. 
4. 

Q. Which of the following compounds on thermal decomposition gives $N_2$ gas?

1. $N{H}_{4}N{O}_2$
2. $Ba(N_3{)}_2$
3. $Na{N}_3$
4. All of the above.

Q.

Give the reason for bleaching action of $C{l}_2$.

Q.

In the contact process, $S{O}_3$ is dissolved in concentrated Sulphuric acid to produce:

1. Fuming Sulphuric acid

2. Pyrosulphuric acid

3. Oleum

4. $H_2{S}_2{O}_7$

Q.

An acidic solution of hydrogen peroxide behaves as an oxidising as well as reducing agent. Illustrate it with the help of a chemical equation.

Q. The exhausted cation exchange resin can be regenerated by the moderately concentrated sodium hydroxide solution. State True or False.

1. True
2. False
3. Cannot be detrmined
4. None of the above

Q. A redox reaction among the following is
(i) $CdC{l}_2+2KOH\to Cd(OH{)}_2+2KCl$
(ii) $BaC{l}_2+K_{2}S{O}_4\to BaS{O}_4+2KCl$
(iii) $CaC{O}_2\to CaO+C{O}_2$
(iv) $2Ca+O_2\to 2CaO$.

1. (i)
2. (ii)
3. (iii)
4. (iv)

Q. In Carius method halogens are estimated as:

1. $X_2$
2. $Ba{X}_2$
3. $Pb{X}_2$
4. $AgX$

Q.

In the contact process, $S{O}_3$ is dissolved in concentrated Sulphuric acid to produce:

1. 

2. 

3. 

4. 

Q.

What is the name of the industrial process which starts with the reaction in catalytic oxidation of ammonia?

Q.

Sulphur trioxide gas is an important precursor to manufacture sulphuric acid. It is produced by the catalytic oxidation of $S{O}_2$ gas. Which of the following are suitable catalysts for the process?

1. 

2. 

3. 

4. 

Q. The correct stability order of the following resonating structures is:

1. (II) > (I) > (III) > (IV)
2. (I) > (II) > (IV) > (III)
3. (I) > (III) > (II) > (IV)
4. (III) > (I) > (IV) > (II)

Q. How many P-P bonds are there in $P_4{S}_3$?

1. 1
2. 2
3. 3
4. 4

Q. When Sulphur is burnt in air, the major product is Sulphur trioxide – True or False?

1. True
2. False

Q. The central atom in $I{F}_7$ has seven pairs of valency electrons. The shape of the molecule as per VSEPR theory is:

1. trigonal bipyramid
2. hexagonal pyramidal
3. square bipyramidal
4. pentagonal bipyramidal

Q. The standard emf of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at ${25}^{o}C$. The equilibrium constant of the reaction would be
(Given, $F=96500Cmo{l}^{-1},R=8.314J{K}^{-1}mo{l}^{-1}$ )

1. $2.0\times {10}^{11}$
2. $4\times {10}^{12}$
3. $1\times {10}^2$
4. $1\times {10}^{10}$

Q. Which one of the following is an example for disproportionation reaction ?

1. $P_4\left(s\right)+3O{H}^{-}\left(aq\right)+3H_{2}O\to P{H}_3\left(g\right)+3{H_{2}P{O}_2}^{-}\left(aq\right)$
2. $Zn\left(s\right)+CuS{O}_4\left(aq\right)\to ZnS{O}_4\left(aq\right)+Cu\left(s\right)$
3. $S\left(s\right)+O_2\left(g\right)\to S{O}_2\left(g\right)$
4. $A{g}^{2+}\left(aq\right)+Ag\left(s\right)\to 2A{g}^{+}\left(aq\right)$

Q. Match the column I with column II to identify the products of oxidation of alkanes and mark the appropriate choice.

	Column I		Column II
(A)	$C{H}_4+2O_2\underset{\left[O\right]}{\overset{KMn{O}_4}{\to }}$	(i)	$HCOOH+H_{2}O$
(B)	$2C{H}_4+O_2\underset{100atm}{\overset{Cu/523K}{\to }}$	(ii)	$C{O}_2+2H_{2}O$
(C)	$C{H}_4+O_2\underset{\Delta }{\overset{M{o}_2{O}_3}{\to }}$	(iii)	$2C{H}_{3}OH$
(D)	$C{H}_4+\frac{3}{2}{O}_2\underset{}{\overset{(C{H}_{3}COO{)}_{2}Mn}{\to }}$	(iv)	$HCHO+H_{2}O$

1. $\left(A\right)\to \left(i\right),\left(B\right)\to \left(ii\right),\left(C\right)\to \left(iii\right),\left(D\right)\to \left(iv\right)$
2. $\left(A\right)\to \left(ii\right),\left(B\right)\to \left(iii\right),\left(C\right)\to \left(iv\right),\left(D\right)\to \left(i\right)$
3. $\left(A\right)\to \left(iv\right),\left(B\right)\to \left(ii\right),\left(C\right)\to \left(iii\right),\left(D\right)\to \left(i\right)$
4. $\left(A\right)\to \left(iii\right),\left(B\right)\to \left(i\right),\left(C\right)\to \left(ii\right),\left(D\right)\to \left(iv\right)$

Q. Moist $S{O}_2$ behaves as a __ agent.

Q. Moist $S{O}_2$ behaves as a __ agent.

Q.

Sulphur trioxide gas is an important precursor to manufacture sulphuric acid. It is produced by the catalytic oxidation of $S{O}_2$ gas. Which of the following are suitable catalysts for the process?

1. Probiotic yoghurt

2. Sodium vapour

3. X-rays

4. $V_2{O}_5$

Q. Moist $S{O}_2$ behaves as a __ agent.

Q. Oxidation of Sulphur to Sulphur trioxide is thermodynamically more favourable than oxidation of Sulphur to Sulphur dioxide – true or false?

1. True
2. False

Q. In the gaseous phase, the sigma O – S – O bond angle in the $S{O}_3$ molecule is degrees.

Q. 56 g of nitrogen and 96 g of oxygen are mixed isothermally and at a total pressure of 10 atm. The partial pressures of oxygen and nitrogen (in atm) are _____ respectively

1. 5, 5
2. 4, 6
3. 6, 4
4. 2, 8