Displacement Reaction

Q.

What happens when diluting hydrochloric acid is added to iron filling?

Q.

Statement 1: The reaction of iron(III) oxide ${Fe}_2{O}_3$ with aluminium is used to join railway tracks or cracked machine parts.
Statement 2: Some of the displacement reactions are highly exothermic reactions.

1. Statement 1 is true, but statement 2 is false.

2. Statement 1 is false but statement 2 is true.

3. Statement 1 and 2 both are true but 2 is not the correct explanation of 1.

4. Statement 1 and 2 both are true and 2 is the correct explanation of 1.

Q.

Name the method used to separate soluble solids from liquids.

Q.

When dilute hydrochloric acid is added to zinc pieces taken in a test tube:

1. The colour of the solution turns yellow.

2. No change takes place.

3. A pungent smelling gas gets liberated.

4. Small bubbles of hydrogen gas appear on the surface of zinc pieces.

Q.

Name the gas which burns with a pop sound.

__

Q.

When iron nails are added to an aqueous solution of copper sulphate, a chemical change occurs. Which of the following is not true about this reaction?

1. Blue colour of the solution fades.

2. It is a displacement reaction.

3. Iron nails become brownish in colour.

4. Iron nails dissolve completely.

Q. Give 5 examples of displacement reaction.

Q.

Why does iron displace copper from its salt solution?

Q. Rust is a hydrated oxide of iron that is ​

1. White
2. Reddish - brown
3. Black
4. Green

Q.

Indicate the type of the following reaction :

${\mathrm{Cl}}_2+2\mathrm{KBr}\to 2\mathrm{KCl}+{\mathrm{Br}}_2$

Q.

Non-metals can't undergo displacement reactions. State if the statement is True/False.

1. True

2. False

Q.

A silver ware is kept in a solution of ${\text{CuSO}}_4\text{(aq)}$. What change will you expect? [2 MARKS]

Q. Which displacement reaction will not occur among the following reactions?

1. $Z{n}_{\left(s\right)}+CuS{O}_{4\left(aq\right)}$
2. $F{e}_{\left(s\right)}+CuS{O}_{4\left(aq\right)}$
3. $C{u}_{\left(s\right)}+FeS{O}_{4\left(aq\right)}$
4. $M{g}_{\left(s\right)}+CuS{O}_{4\left(aq\right)}$

Q.

By writing chemical reaction

Give two examples of Chemical displacement.

Q.

Complete and balance the following reaction:

$\mathrm{Zn}+{\mathrm{H}}_2{\mathrm{SO}}_4\stackrel{}{\to }---$

Q.

Classify the following reaction as a combination, displacement, decomposition, or neutralisation reaction.

$\mathrm{Cu}+2{\mathrm{AgNO}}_3\to \mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2+2\mathrm{Ag}$

Q.

Metal A should be less reactive than metal B to displace metal B from its solution.

1. True

2. False

Q. Ferrous sulphate on heating produces :

1. ferric oxide
2. sulphur dioxide
3. oxygen
4. water

Q. Which of the following is not a type of chemical reaction?

1. Decomposition Reaction
2. Double decomposition Reaction
3. Carbonisation reaction
4. Combination reaction

Q. ↵chemical equation of Cu2+ is treated with KI.

Q. Form and balance the equation ferrous chloride + ammonium hydroxide gives ferrous hydroxide + ammonium chloride

Q. Which type of chemical decomposition reaction is the following reaction?
$Cu(OH{)}_2\stackrel{heat}{\to }CuO+H_{2}O$

1. Decomposition of one element into one compound and one element
2. Decomposition of a compound into two new compounds
3. Decomposition of one compound into two elements
4. Decomposition of one compound into two compound and one element

Q.

What is meant by metal displacement reaction? Give one example

Q. What is the difference between displacement and double displacement reactions? Write equations for these reactions?

Q.

Select the correct answer from the choices A, B, C, and D which are given. Write only the letter corresponding to the correct answer.

Zinc + Hydrochloric acid ⇢ Zinc chloride + Hydrogen

($\mathrm{Zn}+2\mathrm{HCl}\to {\mathrm{ZnCl}}_2+{\mathrm{H}}_2$) is an example of:

1. Double decomposition

2. Simple displacement reaction

3. Synthesis or direct combination reaction

4. Decomposition reaction

Q. Identify the colour change, when curd is tested with litmus paper?

1. Red litmus to green
2. Blue litmus to red
3. Red litmus to blue
4. Blue litmus to green

Q. When dilute hydrochloric acid is added to zinc pieces taken in a test tube:

1. No change takes place.
2. Small bubbles of a gas appear on the surface of zinc pieces.
3. The colour of the solution turns yellow.
4. The gas released will give a pop sound with a glowing splinter.