Preparations and Uses of Caustic Soda

Q. In the manufacture of caustic soda by Castner-Kellner process, the by-products formed are:

1. $H_2,C{l}_2$
2. $C{l}_2,O_2$
3. $H_2,O_2$
4. $N_2,C{l}_2$

Q. Which of the following will not under go disproportionation reaction in the presence of dilute (or) Conc NaOH

1. $P_4$
2. $S_8$
3. $C{l}_2$
4. $F_2$

Q. The principal products obtained on reaction of iodine with cold and dilute caustic soda solution are:

1. $NaIO+NaI$
2. $NaIO+NaI{O}_3$
3. $NaI{O}_3+NaI$
4. $NaI{O}_4+NaI$

Q. In the Castner-Kellner cell used for the manufacture of NaOH, the cathode is:

1. Mercury
2. Nickel
3. Iron
4. Carbon

Q. Which of the following will not under go disproportionation reaction in the presence of dilute (or) Conc NaOH

1. $P_4$
2. $S_8$
3. $C{l}_2$
4. $F_2$

Q. During the electrolysis of an aqueous solution of $NaCl,10.3g$ of chlorine was liberated at STP. Calculate the volume of hydrogen that would be liberated at ${20}^{o}C$ and $740mmofHg$ pressure from acidulated water, when the same quantity of current as that used in the electrolysis of $NaCl$ was passed.

Q.

$C{l}_2+2NaOH\to NaCl+\underset{–}{A}+H_{2}O$ to form. A is

(Cold & dilute)

1. $NaClO$

2. $NaCl{O}_3$

3. $NaCl$

4. None of these

Q. Which of the following is soluble in alcohol?

1. $NaCl$
2. $N{a}_{2}S{O}_4$
3. $N{a}_{2}C{O}_3$
4. $NaOH$