Precipitation Reaction

Q.

The following equation represents double displacement reaction, what is the precipitate in this reaction?

$AgN{O}_3\left(aq\right)+NaI\left(aq\right)\to AgI\left(s\right)+NaN{O}_3\left(aq\right)$

1. Silver iodide

2. Sodium nitride

3. Sodium iodide

4. Silver nitrate

Q. A few drops of silver nitrate solution are added to a solution of a salt. If a pale yellow precipitate forms, which ion from the salt is most likely to be in the solution?

1. Iodide ion
2. Chloride ion
3. Sulphate ion
4. Bromide ion

Q.

A aqueous reaction in which an insoluble product (precipitate) is formed is called __ reaction.

Q.

What can be inferred from the following equation?

$N{a}_{2}S{O}_4\left(aq\right)+BaC{l}_2\left(aq\right)\to BaS{O}_4\left(s\right)+2NaCl\left(aq\right)$

(i) It is a double displacement reaction.

(ii) It is a precipitation reaction.

(iii) It is a decomposition reaction.

(iv) $BaS{O}_4$ is soluble in water

(v) $BaS{O}_4$ is precipitate.

(vi) $NaCl$ dissolves in water.

1. (i), (iii), (v), (vi).

2. (i), (ii), (v), (vi).

3. (i), (ii), (iv), (vi).

4. (ii), (iii), (iv), (vi).

Q. A blue solid ‘X’ was dissolved in water and the solution was divided into two portions. When a few drops of sodium hydroxide were added to the 1st portion, a blue gelatinous precipitate was formed.
When a few drops of dilute nitric acid, followed by a few drops of barium nitrate solution were added to the $2^{nd}$ portion, a white precipitate was formed. From these observations deduce the identity of substance.

1. 
2. 
3. 
4. 

Q.

On combining two aqueous solutions of soluble ionic compounds, a precipitate is formed when

1. the solvent is insoluble.

2. the reactant is insoluble.

3. the product is insoluble.

4. a gas is evolved.

Q.

A aqueous reaction in which an insoluble product (precipitate) is formed is called __ reaction.

Q.

$AgN{O}_3+HCl\to Product$

What precipitates as a product?

1. $AgCl$

2. $NaN{O}_3$

3. $Ag$

4. $Na$

Q.

$CuS{O}_4\left(aq\right)+H_{2}S\left(g\right)\to CuS\left(ppt\right)+H_{2}S{O}_4\left(aq\right)$

What is the colour of precipitate formed?

1. White

2. Yellow

3. Black

4. Blue

Q.

$BaC{l}_2\left(aq\right)+N{a}_{2}S{O}_4\left(aq\right)\to BaS{O}_4\left(ppt\right)+2NaCl\left(aq\right)$

What is the colour of precipitate formed?

1. White

2. Black

3. Yellow

4. Blue