Salts

Q.

Write balanced chemical equations for the following reactions:

$\mathrm{Zinc}+\mathrm{Silver}\mathrm{nitrate}\to \mathrm{Zinc}\mathrm{nitrate}+\mathrm{Silver}$

Q.

How will you separate a mixture of common salt and sand?

Q.

Neutralization and precipitation reaction are the double displacement reactions?

Q. When green crystals of ferrous sulphate are heated, the colour of the crystals changes because:

1. It decomposes to ferric oxide
2. It loses water of crystallisation
3. It evolves $S{O}_2$ gas
4. It evolves $S{O}_3$ gas

Q.

Give the chemical formula for ammoniacal brine solution.

Q.

Write the balanced chemical equation for the following and identify the type of reaction in each case –
$\left(A\right)Potassiumbromide\left(aq\right)+Bariumiodide\left(aq\right)\to Potassiumiodide\left(aq\right)+Bariumbromide\left(s\right)$

$\left(B\right)Zinccarbonate\left(s\right)\to Zincoxide\left(s\right)+Carbondioxide\left(g\right)$

Q.

Write the Balanced Chemical Equation for the Action of Granulated Zinc With Sodium hydroxide. Name the Products Formed.

Q.

Is Na₂CO₃.10H₂O actually wet?

Q.

Write the chemical name and common name of NaOH.

Q.

Name the chemical which is used as a preservative in pickles and curing fish.

Q.

Two metals X and Y form the salts $XS{O}_4$ and $Y_{2}S{O}_4$, respectively. The solution of salt $XS{O}_4$ is blue in colour whereas that of $Y_{2}S{O}_4$ is colourless. When barium chloride solution is added to $XS{O}_4$ solution, then a white precipitate Z is formed along with a salt which turns the solution green. And when barium chloride solution is added to $Y_{2}S{O}_4$ solution, then the same white precipitate Z is formed along with colourless common salt solution.

(a) What could the metal X and Y be ?

(b) Write the name and formula of salt $XS{O}_4$.

(c) Write the name and formula of salt $Y_{2}S{O}_4$.

(d) What is the name and formla of white precipitate Z ?

(e) Write the name and formula of the salt which turns the solution green in the first case.

Q.

What are deliquescent salts?

Q.

Name :

(a) a chloride which is insoluble in cold water but dissolves in hot water,

(b) a chloride which is insoluble,

(c) two sulphates which are insoluble,

(d) a basic salt,

(e) an acidic salt,

(f) a mixed salt,

(g) a complex salt,

(h) a double salt,

(i) a salt whose solubility increases with temperature,

(j) a salt whose solubility decreases with temperature.

Q.

(a) What is a salt ? Give the names and formulae of any two salts. Also, name the acids and bases from which these salts may be obtained.

(b) What is meant by 'a family of salts of salts'? Explain with examples.

(c) What is meant by 'hydrated' and 'anhydrous' salts? Explain with examples.

(d) Write the names, formulae and colours of any two hydrated salts.

(e) What will be the colour of litmus in an aqueous solution of ammonium chloride salt?

Q.

What is the chemical name of washing soda? Name three raw materials used in making washing soda by Solvay process.

Q.

Which of the following substances will cause permanent hardness of water?

1. Mg(HCO₃)₂

2. Ca(HCO₃)₂

3. MgSO₄

4. NaCl

Q.

How will you separate the following mixtures? Name the methods that can be used.

CaCO₃ and NaCl

Q.

Potash alum is a double salt having the chemical formula${\mathrm{K}}_2{\mathrm{SO}}_4.{\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3.24{\mathrm{H}}_2\mathrm{O}.$ It dissolves in water to form a clear solution.

Between what pH range will the clear solution lie? Explain.

Q.

Answer the following questions related to salts and their preparations :

(a) What is a 'salt'?

(b) What kind of salt is prepared by precipitation?

(c) Name a salt prepared by a direct combination. Write an equation for the reaction that takes place in preparing the salt you have named.

(d) Name the procedure used to prepare a sodium salt such as sodium sulphate.

Q.

Name the salt which is used as a preservative in pickles, and in curing meat and fish.

Q.

Give the preparation of the salt shown in the left column by matching with the methods given in the right column.

Write a balanced equation for each preparation.

Salt Method of preparation

Zinc sulphate Precipitation

Ferrous sulphide Oxidation

Barium sulphate Displacement

Ferric sulphate Neutralisation

Sodium sulphate Synthesis.

Q.

The Dead Sea contains many dissolved salts and so people can easily float on it. Therefore Dead Sea is a ________ solution.

1. Suspended

2. Supersaturated

3. Unsaturated

4. Saturated

Q. What is the ph of sodium hydrogencarbonate?

Q.

Represent the balanced chemical equation for the reaction between iron(III)chloride with sodium hydroxide.

Q. NaCl and $N{a}_{2}S{O}_4$ belong to salt family whereas NaCl and HCl belong to salt family.

1. chloride $\left(C{l}^{-}\right)$
2. sodium $\left(N{a}^{+}\right)$
3. sulphate $S{O}_4^2-$
4. hydrogen $H^{+}$

Q.

The catalyst used in the contact process is-

1. A. Copper

2. B. Iron

3. C. Vanadium pentoxide

4. D. Manganese dioxide

Q. Blue color compound 'X' changes to white color compound 'Y' on heating and when we moisten compound 'Y', blue color of compoumd 'X' reappers. This is because compound 'X' has some water of crystallisation.

1. True
2. False

Q.

Write the chemical name of the following compound.

${\mathrm{Na}}_3{\mathrm{PO}}_4$

Q.

Is ${\mathrm{MnO}}_2$ soluble in water?

Q.

How do you neutralize phenol?