Displacement Reactions

Q. What is displacement reaction?

Q. Question 9 (b)
What happens when:
Iron nails are placed in copper sulphate solution?
Write word equations of the reactions involved.

Q. Question 6 (c)
Give reasons for the following.
Copper cannot displace zinc from its salt solution.

Q.

What happens when dilute sulphuric acid is poured on a copper plate. Explain.

Q.

Paheli prepared a blue-coloured solution of Copper sulfate in beaker A and placed an Iron nail in it. Boojho prepared a yellowish-green solution of Ferrous sulphate in beaker B and placed a Copper wire in it. What changes will they observe in the two beakers after an hour?

Q. Which of the following is an example displacement reaction?

1. ${\text{CaCO}}_{\text{3}}\text{(s)}$ $\stackrel{\text{Heat}}{\to }$ $\text{CaO(s)}$ + ${\text{CO}}_{\text{2(g)}}$
2. $\text{2Mg(s)}$ + ${\text{O}}_2\text{(g)}$ $\to$ $\text{2MgO(s)}$
3. $\text{Fe(s)}$ + ${\text{CuSO}}_{\text{4}}\text{(aq)}$$\to$ ${\text{FeSO}}_4\text{(aq)}$ + $\text{Cu(s)}$
4. ${\text{N}}_2\text{(g)}+{\text{H}}_2\text{(g)}\to {\text{2NH}}_3\text{(g)}$

Q.

A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a/an ________ reaction.

1. addition

2. double displacement

3. displacement

4. combination

Q.

What would you observe on adding dilute hydrochloric acid to zinc metal in a test tube?

Q.

The chemical change involving iron and hydrochloric acid illustrates a __ reaction.

Q. Question 9 (a)
What happens when
Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.

Q.

What do you observe when

(a) Iron nail is kept in copper sulphate solution for sometime.

(b) Phenolphthalein is added to sodium hydroxidee solution.

(c) Blue litmus paper is dipped in dilute hydrochloric acid.

(d) Lead nitrate is heated.

(e) magnesium ribbon is burnt in oxygen.

(f)ammonia is brought in contact of hydrogen chloride gas.

Q.

When an element displaces another element from its compound, a _____________ reaction occurs.

Q.

why does the colour of copper sulphate solution change when an iron nail is dipped in it ?

Q.

Reactivity of metal increases with increase in temperature because:

1. It increases intermolecular attraction between molecules.

2. It increases collision between molecules.

3. It decreases pressure.

4. It increases pressure and hence decreases intermolecular spaces.

Q.

Which of the following pairs cannot undergo displacement reaction?

(a) iron sulphate solution and magnesium

(b) zinc sulphate solution and iron

(c) zinc sulphate solution and calcium

(d) silver nitrate solution and copper

Q.

A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called ___ reaction.

Q. What happens when zinc granules are treated with dilute solution of H2SO4, HCL, HNO3, Nacl and NaOH? Also write the chemical equation if reaction occurs.

Q.

_______ cannot replace zinc from zinc sulphate.

Q.

Metal can displace other metal from its salt solution.

1. True

2. False

Q.

You are given a solution of iron sulphate. Which of the following do you think cannot displace iron from iron sulphate ?

(a) magnesium

(b) calcium

(c) copper

(d) zinc

Q.

Metal Reactivity series is based on:

1. How easily metals can lose their electrons.

2. How easily metals can gain their electrons.

3. How easily non-metals can lose their electrons.

4. How easily non-metals can gain their electrons.

Q. Boojho has learnt that when non-metals are beaten with a hammer, they generally break into pieces. Which of the following is a non-metal?

1. Copper plate
2. Piece of coal
3. Iron nail
4. Aluminium wire

Q. In a displacement reaction, a element displaces a element from its salt solution.

1. more reactive
2. less reactive
3. heavy weight
4. light weight

Q. Iron nails are placed in copper sulphate solution. Write word equations of the reactions involved.

Q. Assertion :Metals and non-metals both can take part in the displacement reaction. Reason: Metals and non-metals both can displace less reactive metal/non-metal and forms product depending upon activity series.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Give reasons for the following.
Copper cannot displace zinc from its salt solution.

Q.

Metal Reactivity series is the arranged list of metals based on their reactivity.

1. True

2. False

Q. Which of the following non-metals reacts and catches fire on exposure to air?​

1. sulphur
2. nitrogen
3. phosphorus
4. hydrogen

Q.

Name the type of the following reaction:

Q. A student placed a clean iron nail in blue coloured copper sulphate solution for a considerable time. He observes that :
(1) iron nail gets green coating
(2) iron nail gets brown coating
(3) iron nail gets no coating
(4) iron nail gets blue coating