Formation of Precipitate

Q.

Barium chloride on reacting with sodium sulphate forms barium sulphate and sodium chloride. Which of the following is the precipitate?

1. Barium chloride

2. Barium sulphate

3. Sodium sulphate

4. Sodium chloride

Q. When ferrous sulphate $\left({\text{FeSO}}_4\right)$ solution combines with sodium hydroxide $\text{(NaOH)}$, the chemical change is identified by the .

1. formation of gas
2. formation of ppt
3. absoprtion of heat

Q.

When Sodium sulphate and Barium Chloride are mixed in an aqueous solution, a white precipitate of _________ is formed.

Q.

When sodium sulphate solution reacts with barium chloride solution, the solution after the reaction contains

1. Barium sulphide

2. Sodium chloride

3. Both A and B

4. None of A and B

Q. How many images involve a chemical change?

1. 2

Q.

In washing powders, certain chemicals are added to impart the under-mentioned properties. Name the chemical used for each purpose.

Keep the washing powder dry

Q.

Barium chloride solution can be used to distinguish between a sodium sulphate solution and sodium nitrate solution. How is this done?

Q.

In washing powders, certain chemicals are added to impart the under-mentioned properties. Name the chemical used for each purpose.

Remove dust particles

Q.

$AgN{O}_{3\left(aq\right)}+NaC{l}_{\left(aq\right)}\to AgC{l}_{\left(s\right)}+NaN{O}_{3\left(aq\right)}$.
Above reaction involves formation of precipitate.

1. False

2. True

Q.

State your observations

Barium chloride solution is slowly added to Sodium Sulphate solution?

Q.

When lead nitrate reacts with potassium iodide, yellow precipitate of

1. $Pb{I}_2$ is formed

2. $KN{O}_3$ is formed

3. $Pb(N{O}_3{)}_2$ is formed

4. $PbI{O}_3$ is formed

Q.

6. Write one of the reaction for each of the following characteristics :

(d) Formation of percipitate

Q. Sam blows air into limewater using a straw. He notices that the limewater turns milky. Identify the gas responsible for the change and the type of change involved.

1. Gas - oxygen
   Change - chemical
2. Gas - carbon dioxide
   Change - chemical
3. Gas - oxygen
   Change - physical
4. Gas - carbon dioxide
   Change - physical

Q. When iron filings are added to copper sulphate solution, a confirms the occurrence of a chemical change.

1. change in colour
2. evolution of gas
3. evolution of heat

Q. Precipitate formation during chemical reaction is indicated by this arrow :

1. $\to$
2. $\uparrow$
3. $\downarrow$
4. $\leftarrow$

Q. When carbon dioxide gas is passed through lime water,

1. calcium hydroxide is formed.
2. white precipitate of CaO is formed.
3. white precipitate of $CaC{O}_3$ is formed.
4. colour of lime water disappears.

Q.

Precipitates are _____ substances.

1. soluble

2. insoluble

3. little soluble

4. readily soluble

Q. When ferrous sulphate $\left({\text{FeSO}}_4\right)$ solution combines with sodium hydroxide $\text{(NaOH)}$, the chemical change is identified by the .

1. formation of gas
2. formation of ppt
3. absoprtion of heat