Preparations and Uses of Caustic Soda

Q. Sodium hydroxide is produced on a large scale:

1. by reacting to water

2. by the electrolysis of Na₂CO₃

3. by adding water to Na₂O

4. by the electrolysis of aqueous solution of using as cathode

Q. Which one on reaction with NaOH solution gives inflammable gas?

1. S

2. Zn

3. NH₄Cl

4. I₂

Q. Reaction of $Zn(OH{)}_2$ with $NaOH$ produces:

1. None of these

2. Na₂(ZnO₂)

3. ZnO

4. Na₂O

Q.

\(2NaOH ~+~ 2NO_2~\rightarrow~A ~+~B~+~ H_2O\); A & B are

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

1. P₄

2. S₈

3. Cl₂

4. F₂

Q.

Sn reacts with sodium hydroxide solution to form

$Sn+2NaOH+H_{2}O\to$ _____$+2H_2$

1. Na₂SnO

2. Na₂SnO₃

3. Na₂SnO₂

4. Na₂SnO₄

Q. The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives :

1. $\left[Zn\right(OH{)}_4{]}^{2-}$
2. $Zn(OH{)}_2$
3. Both (b) and (c)
4. $[Zn{O}_2{]}^{2-}$

Q. Which of the following salts does not form any precipitate with excess of $NaOH$?

1. ZnCl₂

2. FeCl₃

3. CuSO₄

4. 

Q.

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

(Cold & dilute)

1. None of these

2. 

3. 

4. 

Q. Which of the following is soluble in alcohol?

1. NaCl

2. Na₂SO₄

3. Na₂CO₃

4. NaOH