Double Displacement Reaction

Q.

What type of chemical reaction is ${\mathrm{NH}}_3+\mathrm{HCl}\to {\mathrm{NH}}_4\mathrm{Cl}$?

1. Combination reaction

2. Substitution reaction

3. Decomposition reaction

4. Double displacement reaction

Q.

The reaction of calcium oxide with water to form calcium hydroxide is an example of:

1. Combination reaction

2. Exothermic reaction

3. Decomposition reaction

4. Both combination and exothermic reaction

Q.

Question 26

A solution of potassium chloride when mixed with silver nitrate solution, forms an insoluble white substance. Write the chemical reaction involved and also mention the type of the chemical reaction.

Q. What is the colour of precipitate formed when lead nitrate reacts with potassium iodide?

1. Green
2. Black
3. Blue
4. Yellow

Q.

Which of the following isomers will give a white precipitate with${\mathrm{BaCl}}_2$ solution?

1. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{SO}}_4\right]\mathrm{Br}$

2. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Br}\right]{\mathrm{SO}}_4$

3. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_4{\left({\mathrm{SO}}_4\right)}_2\right]\mathrm{Br}$

4. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_4\mathrm{Br}\right({\mathrm{SO}}_4\left)\right]$

Q.

Identify the following reaction .

${\mathrm{AgNO}}_3+\mathrm{HCl}\to \mathrm{AgCl}+{\mathrm{HNO}}_3$

Q.

Which of the following reactions represents a double displacement reaction?

1. 

2. 

3. 

4. 

Q.

What happens if you mix Acetone and water ?

Q.

Which of these salts will give a white precipitate with a Barium chloride solution?

1. Blue vitriol

2. Green vitriol

3. White vitriol

4. All of the above.

Q.

$Pb\left(N{O}_3{)}_2\right(aq)+2KCl(aq)\to 2KN{O}_3(aq)+PbC{l}_2(s)$

When lead nitrate solution is mixed with potassium chloride solution, a precipitate of lead chloride and potassium nitrate solution are formed. This type of reaction is called _________________.

1. Combination

2. Decomposition

3. Displacement

4. Double displacement

Q.

CaO + H₂O → Ca(OH)₂ is an example of a _______ reaction.

1. Combination

2. Double displacement

3. Displacement

4. Neutralization

Q.

When lead nitrate is heated, it breaks down into lead monoxide, nitrogen dioxide, and oxygen

$2\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\to 2\mathrm{PbO}+4{\mathrm{NO}}_2+{\mathrm{O}}_2$

The reaction is an example of:

1. Combination reaction

2. Displacement reaction

3. Decomposition reaction

4. Double displacement reaction

Q.

Which method is used to separate a mixture of blue and red ink?

Q.

Burning of Magnesium ribbon in air is an example of _______ .

1. Combination reaction

2. Endothermic reaction

3. Decomposition reaction

4. Reduction reaction

Q.

Does colour change occur in a double displacement reaction?

Q.

1) zinc carbonate= zinc oxide+ carbon dioxide

2) potassium bromide+ barium iodide = potassium iodide + barium bromide

Balance the equations

Q.

Which of the following chemical reactions is an example of a combination reaction?
A.$Ca\left(s\right)+2HCl\left(aq\right)⟶CaC{l}_2\left(aq\right)+H_2\left(g\right)$
B. $2KCl{O}_3\left(s\right)⟶2KCl\left(s\right)+3O_2\left(g\right)$
C.$2H_2{O}_2\left(l\right)⟶2H_2\left(g\right)+O_2\left(g\right)$
D. $2S\left(s\right)+3O_2\left(g\right)⟶2S{O}_3\left(g\right)$

Q.

Q5. Gelatinous white precipitate soluble in excess of Ammonium hydroxide are of

1. Calcium hydroxide

2. Zinc hydroxide

3. Magnesium hydroxide

4. Lead hydroxide

Q.

To verify the law of conservation of mass in a chemical reaction a student takes a known amount of solution of barium chloride in a small test tube which is hanged in a sealed conical flask, containing the solution of $N{a}_{2}S{O}_4$. The flask is slightly tilted so that the two solutions get mixed with each other and a chemical reaction occurs. What is the relation between the masses of the chemicals involved?

Q.

Give one example of a double decomposition reaction.

Q.

The colour of ink added to water remains visible even after multiple dilutions. Why?

Q. Write balanced chemical equation when potassium dichromate is heated?

Q. How is sodium carbonate prepared?

Q. The reaction given below is an example of:
${\text{CuSO}}_4\text{(aq)}+{\text{H}}_2\text{S(g)}\to \text{CuS(s)}$ $\downarrow$ + ${\text{H}}_2{\text{SO}}_4\text{(aq)}$

1. displacement reaction
2. combination reaction
3. double displacement reaction
4. decomposition reaction

Q.

Balancing:

◆Give a balanced equations for reactions involving evolution of a gas on addition of dilute acid to--

a】Sodium Sulphate b】Calcium Carbonate

Q. Calcium reacts vigorously with water to produce slaked lime. This reaction can be classified as:
I. Combination Reaction
II. Endothermic Reaction
III. Exothermic Reaction

1. III only
2. I and III
3. I only
4. I and II

Q.

In double displacement reactions _______ are exchanged by the reactants.

1. ions

2. compounds

3. molecules

4. atoms

Q.

Which of the following statement is correct for a double displacement reaction?

1. A single reactant is present

2. All of these

3. There is an exchange of ions between the reactants

4. A single product is formed

Q.

What is the precipitate formed when a pale green compound reacts with caustic soda to form dirty green gelatinous precipitate along with sodium sulphate?

1. Ferric hydroxide

2. Ferrous hydroxide

3. Copper hydroxide

4. Zinc hydroxide

Q. State the methods by which hydrated salts can be made anhydrous?