Preparation of Hydrogen

Q. The mixture of $CO$ and $H_2$ is called:

1. Water gas
2. Producer gas
3. Coal gas
4. All of these

Q. What are the reactants in Lane's process?

1. iron and oxygen
2. hydrogen and oxygen
3. oxygen and water
4. iron and steam

Q. The highly pure hydrogen is obtained when?

1. Water gas shift reaction
2. Lane's process
3. Electrolysed with barium hydroxide solution
4. Hydrogen sulfate is reacted with zinc

Q. Hydrogen can be prepared by mixing steam and water gas at ${500}^{\circ }C$ in the presence of $F{e}_2{O}_3$ and $C{r}_2{O}_3$. This process is called:

1. Nelson process
2. Serpeck’s process
3. Bosch process
4. Parke’s process

Q. Which of the following easily reacts with water producing hydrogen ?

1. $P{H}_3$
2. $B_2{H}_6$
3. $C{H}_4$
4. $H_{2}S$

Q. Which of the following pair will not produce dihydrogen gas?

1. $Cu+HCl\text{(dil.)}$
2. $Fe+H_{2}S{O}_4$
3. $Mg+\text{steam}$
4. $Na+\text{alcohol}$

Q. The carbon dioxide produced in water gas shift reaction is removed by scrubbing with:

1. Sodium hydroxide solution
2. Sodium arsenite solution
3. Sodium chloride solution
4. water

Q. Which of the following statements is/are correct?

1. Atomic hydrogen is obtained by passing hydrogen through an electric arc
2. Nascent hydrogen is more reactive than the dihydrogen
3. Pure para hydrogen is produced but not pure ortho hydrogen.
4. Ordinary dihydrogen is not a equilibrium mixture of ortho and para hydrogen

Q. Hydrogen cannot be obtained by:

1. $Zn+dil.H_{2}S{O}_4$
2. $Zn+dil.HN{O}_3$
3. $Mg+dil.H_{2}S{O}_4$
4. $Mg+H_{2}O\left(g\right)$

Q. Which one of the following is not an industrial method of preparation of hydrogen?

1. Electrolysis of brine
2. Electrolysis of acidified water
3. Wurtz reaction
4. Bosch's process or Lane's process

Q. Match each entry in Column - I with only one entry from Column - II
for the given properties/applications mentioned therein:

$\begin{array}{cccc}& & & \\ & Column-I& & Column-II\\ \left(a\right)& H& \left(p\right)& Usedinthenameofperhydrol\\ \left(b\right)& H_2& \left(q\right)& CanbereducedtodihydrogenbyNaH\\ \left(c\right)& H_{2}O& \left(r\right)& Canbeusedinhydroformylationofolefin\\ \left(d\right)& H_2{O}_2& \left(s\right)& Canbeusedincuttingandwelding\end{array}$

1. (a) $\to$ (s); (b) $\to$ (r); (c) $\to$ (q); (d) $\to$ (p)
2. (a) $\to$ (p); (b) $\to$ (r); (c) $\to$ (q); (d) $\to$ (s)
3. (a) $\to$ (s); (b) $\to$ (q); (c) $\to$ (r); (d) $\to$ (p)
4. (a) $\to$ (r); (b) $\to$ (s); (c) $\to$ (q); (d) $\to$ (p)

Q. Syngas contains

1. only CO
2. only $H_2$
3. both CO and $H_2$
4. All the above

Q. Which is the correct combination of products collected over anode and cathode respectively in order to prepare hydrogen by electrolysis of water?

1. $O_2,H_2$
2. $H_2,O_2$
3. $Na,O_2$
4. $O_2,Na$

Q. Predict the product A and B in the following reaction :
$Fe+dilHCl\to A+B$

1. $A=FeC{l}_2,B=H_2$
2. No reaction will take place
3. $FeC{l}_3,B=H_2$
4. $A=FeC{l}_2,B=C{l}_2$

Q. Metal which does not react with cold water but reacts with steam to liberate $H_2$ gas is :

1. Na
2. Mg
3. Au
4. Fe

Q. Very pure hydrogen is obtained by

1. Reaction of coal or CO with steam

2. Electrolysis of warm, aqueous solution of $Ba(OH{)}_2$ between nickel electrodes

3. Cracking of naphtha and fuel cell
4. Adding zinc granules to all acids

Q. The mixture of $CO$ and $H_2$ is called:

1. Water gas
2. Producer gas
3. Coal gas
4. All of these

Q. Which of the following easily reacts with water producing hydrogen ?

1. $P{H}_3$
2. $B_2{H}_6$
3. $C{H}_4$
4. $H_{2}S$

Q.

Among the following which is the condition favourable for the formation of $C{H}_{3}OH$ from $CO$ and $H_2$ ?

1. Finely divided 'Fe' catalyst, 'Mo' promoter temperature = ${300}^{\circ }C$, Pressure = 200 atm

2. 'Ni' catalyst, T = 725 - 775 K, P = 200 atm

3. 'ZnO' catalyst, $C{r}_2{O}_3$ - promoter, T = ${300}^{\circ }$C, P = 200 atm

4. 'Co' catalyst, T = ${200}^{\circ }C$

Q.

Water gas is produced by

1. Passing steam over red-hot coke

2. Passing steam and air over red-hot coke

3. Burning coke in excess of air

4. Burning coke in limited supply of air

Q. Which of the following metal(s) on treatment with NaOH will liberate $H_2$ gas?

1. Zn
2. Sn
3. Al
4. Mg

Q. Match each entry in Column - I with only one entry from Column - II
for the given properties/applications mentioned therein:

$\begin{array}{cccc}& & & \\ & Column-I& & Column-II\\ \left(a\right)& H& \left(p\right)& Usedinthenameofperhydrol\\ \left(b\right)& H_2& \left(q\right)& CanbereducedtodihydrogenbyNaH\\ \left(c\right)& H_{2}O& \left(r\right)& Canbeusedinhydroformylationofolefin\\ \left(d\right)& H_2{O}_2& \left(s\right)& Canbeusedincuttingandwelding\end{array}$

1. (a) $\to$ (s); (b) $\to$ (r); (c) $\to$ (q); (d) $\to$ (p)
2. (a) $\to$ (p); (b) $\to$ (r); (c) $\to$ (q); (d) $\to$ (s)
3. (a) $\to$ (s); (b) $\to$ (q); (c) $\to$ (r); (d) $\to$ (p)
4. (a) $\to$ (r); (b) $\to$ (s); (c) $\to$ (q); (d) $\to$ (p)

Q.

Name the acid used in the laboratory preparation of hydrogen.

Q.

Hydrogen is evolved by the action of cold dil. $HN{O}_3$ on

1. Fe

2. Mn

3. Cu

4. Al

Q.

Which of the following will not produce hydrogen gas?

1. Electrolysis of mildly acidified water

2. Reaction of Zn with concentrated $H_{2}S{O}_4$

3. Reaction of Zn with NaOH

4. Electrolysis of NaCl in Nelson's cell

Q.

244. PREPARATION OF SALTS

Direct combination of elements

(b) $\mathrm{Hg}+\mathrm{S}\to$