Ionic Salts and Their Characteristic

Q.

Which of the following compounds will be suitable for Kjeldahls method for nitrogen estimation?

1. 

2. 

3. 

4. 

Q.

What is hydronium ion and how is it formed

Q.

In an estimation of bromine by the Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of bromine in the compound is…….. (Atomic mass, Ag=108, Br=80 g mol^–1)

Q.

Why is aqueous solution of copper sulphate acidic in nature?

Q.

Which oxide of Nitrogen is neutral?

Q.

What is common ion effect? Give an example.

Q. Match the colours of the salts with their chemical formulae.

1. Blue
2. Green
3. Pink
4. Dark green

Q.

What happens when nitric acid reacts with ammonia?

Q.

Which of the following anion is orange in colour?

1. Permanganate ion

2. Dichromate ion

3. Sulphate ion

4. Chloride ion

Q. Write the colour of the following salts:
(a) Cuprous salts
(b) Cupric salts
(c) Aluminium salts
(d) Ferrous salts
(e) Ferric salts
(f) Calcium salts

Q. Match the following:

Column A	Column B
1. Acid salt 2. Mixed salt 3. Complex salt 4. Double salt 5. Normal salt	(a) Sodium potassium carbonate (b) Alum (c) Sodium carbonate (d) Sodium zincate (e) Sodium hydrogen carbonate

Q.

Give an example of a colourless ion.

Q.

Name the other Ion formed when Ammonia dissolves in water.

Q.

Write the probable colour of the following salts:
(a) Ferrous salt

(b) Ammonium salt

(c) Cupric salt

(d) Calcium salts

(e) Aluminium salt

Q.

How do you predict enthalpy change?

Q.

Identify the following substance that is underlined: An alkaline gas which produces dense white fumes when reacted with hydrogen chloride gas.

Q.

When barium chloride is added to soluble magnesium sulphate, a white precipitate X is formed. What is X?

1. Magnesium chloride

2. Magnesium sulphite

3. Barium sulphite

4. Barium sulphate

Q. (a) Write the balanced equations for the preparation of the following compounds (as the major product), starting from iron and using only one other substance:
(i) iron (II) chloride
(ii) iron (III) chloride
(iii) iron (II) sulphate
(iv) iron (II) sulphide
(b) Write the equations for the laboratory preparation of
(i) sodium sulphate using dilute sulphuric acid.
(ii) lead sulphate using dilute sulphuric acid.

Q. Write balanced equations for the following reactions:
(i) Iron (II) chloride solution with sodium hydroxide solution.
(ii) Chlorine and cold dilute sodium hydroxide solution.
(iii) Zinc and sodium hydroxide solution.
(iv) Sulphur dioxide and sodium hydroxide solution.
(Give the equation for the formation of the normal salt).

Q.

Identify the cation for the reaction NH₄OH solution when added to the solution (B) gives white precipitate which does not dissolve in excess?

Q.

An ionic salt exhibits colour only when _______.

1. its anions are coloured.

2. its cations are coloured.

3. either cation or anion is coloured.

4. both cation and anion are colourless.

Q. Sodium hydroxide and ammonium hydroxide are used in analytical chemistry for identifying __ radicals.

1. acidic
2. basic
3. neutral
4. ionic

Q.

A compound used in making nylon is 43.8% oxygen. There are four oxygen atoms per molecule. What is the molecular weight of the compound?

Q.

Both sodium and ammonium hydroxide are used in analytical chemistry for identifying __[cations/anions] of salts.

Q.

Identify the group of elements that are generally colourless.

1. 1

2. 14

3. 16

4. 3

Q.

Which of the following anion is gives a colourless solution?

1. Nitrate ion

2. Permanganate ion

3. Dichromate ion

4. Chromate ion

Q.

Sodium hydroxide and ammonium hydroxide are used in analytical chemistry for identifying __ [acidic/basic] radicals.

Q.

In what physical state will $\mathrm{NaOH}$ be at room temperature? Explain.

Q. Match the following salts with their formulae.

1. $N{a}_{2}C{O}_3.10H_{2}O$
2. $CaOC{l}_2$
3. $CaS{O}_4.½H_{2}O$
4. $CaS{O}_4.2H_{2}O$

Q.

Identify the Anion present in the compound L on reacting with Barium chloride solution gives a white precipitate insoluble in dilute hydrochloric acid or dilute nitric acid?