Preparations and Uses of Caustic Soda

Q.

What is the reaction of copper in $\mathrm{HCl}$?

Q.

Explain faradays second law of electrolysis in details.

Q.

Discuss the various reactions that occur in the Solvay process.

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.

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. Match List - I with List - II.
$\begin{array}{cccc}& \text{List-I}& & \text{List-II}\\ \text{(a)}& Li& \text{(i)}& \text{absorbent for}\\ & & & \text{carbon dioxide}\\ \text{(b)}& Na& \text{(ii)}& \text{electrochemical cells}\\ \text{(c)}& KOH& \text{(iii)}& \text{coolant in fast}\\ & & & \text{breeder reactors}\\ \text{(d)}& Cs& \text{(iv)}& \text{photoelectric cell}\end{array}$
Choose the correct answer from the options given below:

Q.

Write a balanced equation Magnesium metal is treated with dilute Hydrochloric acid.

Q.

Write the balanced chemical equation when Hydrochloric acid reacts with Zinc Oxide?

Q.

The alkaline hydrolysis of oils and fats is called _________.

Q.

The hydroxide of which metal ion is soluble in excess of sodium hydroxide solution.

1. 

2. 

3. 

4. 

Q. Electrolysis of aqueous sodium chloride solution will form _____at the cathode.

1. Hydrogen gas
2. sodium metal
3. water
4. chlorine gas

Q. How to find formula of compounds ending with ic, ous, ortho, ate, ite etc(For example Ferrous, ferric, sulphite, sulphateetc, .)?

Q.

Why is ferric chloride solution used to stop bleeding from a wound?

Q. Assertion: Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal.

Reason: Copper is extracted by hydrometallurgy.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Assertion is true but reason is false.
3. Assertion is false but reason is true.
4. Assertion and reason both are wrong.
5. Both assertion and reason are true but reason is not the correct explanation of assertion.

Q. In the caster kellner cell used for the manufacture of NaOH, the cathode is

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

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.

The drying agent for chlorine gas is ___________.

Q. Match List-I with List-II : (Both having metallurgical terms)

List-I	List-II
(a) Concentration of Ag ore	(i) Reverberatory furnace
(b) Blast furnace	(ii) Pig iron
(c) Blister copper	(iii) Leaching with dilute $NaCN$ solution
(d) Froth floatation method	(iv) Sulfide ores

Choose the correct answer from the options given below :

1. $\left(a\right)-\left(iii\right),\left(b\right)-\left(ii\right),\left(c\right)-\left(i\right),\left(d\right)-\left(iv\right)$
2. $\left(a\right)-\left(iii\right),\left(b\right)-\left(iv\right),\left(c\right)-\left(i\right),\left(d\right)-\left(ii\right)$
3. $\left(a\right)-\left(iv\right),\left(b\right)-\left(i\right),\left(c\right)-\left(iii\right),\left(d\right)-\left(ii\right)$
4. $\left(a\right)-\left(iv\right),\left(b\right)-\left(iii\right),\left(c\right)-\left(ii\right),\left(d\right)-\left(i\right)$

Q.

When a metal $\mathrm{X}$ is treated with cold water, it gives a basic salt $\mathrm{Y}$ with molecular formula $\mathrm{XOH}$ (Molecular mass = 40) and liberates a gas $\mathrm{Z}$ which easily catches fire. Identify $\mathrm{X}$, $\mathrm{Y}$ and $\mathrm{Z}$ and also write the reaction involved.

Q. Which is found when $F_2$ reacts with hot conc. sodium hydroxide?

1. $O_2$
2. $O_3$
3. NaO
4. HF

Q. What is the product when Neopentyl alcohol is treated with HBr?

Q. Choose the incorrect statement related to Castner- Kellner cell.

1. $H_2$ and $C{l}_2$ were the by-products
2. Brine solution flow in opposite direction of mercury
3. Sodium amalgum react with water to give NaOH
4. Mercury is re-circulated to the cell

Q. Assertion: Sulphide ores are concentrated by Froth Flotation method.

Reason: Cresols stabilise the froth in Froth Flotation method.

1. Assertion is true but reason is false.
2. Both assertion and reason are true and reason is the correct explanation of assertion.
3. Both assertion and reason are true but reason is not the correct explanation of assertion.
4. Assertion and reason both are wrong.
5. Assertion is false but reason is true.

Q.

A Galvanic cell is composed of two hydrogen electrodes, one of which is a standard one. In which of the following solutions should the other electrode be immersed to get maximum emf.

1. 0.1 M CH3COOH

2. 0.1 M HCl

3. 0.1 M H3PO4

4. 0.1 M H2SO4

Q. NaOH is prepared by the method

1. Castner-Kellner cell
2. Le-Blanc process
3. Solvay process
4. Calcination

Q.

Write the chemical equation for preparing sodium soap from glyceryl oleate and glyceryl palmitate. Structural formulae of these compounds are given below.

(i)

(ii)

Q.

A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black color product. Identify M and black colored product and also explain the reaction of M with oxygen.

Q.

Complete and balance the equation

${\mathrm{ZnCO}}_3+\mathrm{HCl}\to$

Q.

In an electrochemical process, a salt bridge is used to _______

Q.

Ethyl alcohol cannot be dried by anhydrous CaCl₂ because

1. It is insoluble in CaCl₂

2. Explosion takes place

3. It reacts with CaCl₂

4. It is soluble in water