Question

1. Fill in the blanks.
1. The series in which metals are placed in the decreasing order
of their reactivity is known as
2. An insoluble solid substance formed in the solution is called
3. Sodium is
reactive than magnesium.
4. The reactions in which cations and anions are exchanged, i
known as
reaction.
5. The chemical formula of sodium chloride is.
II. Answer the following questions.
1. What is meant by a displacement reaction?
2. Write the reactivity series of metals.
3. State the type of reaction shown by following equations.
i) Ca + Zno
> CaO + Zn
ii) BaCl2 + Na2S04_
BaSO4 + 2 NaCl
iii) Cu + 2AgNO3
Cu(NO3)2 + 2Ag
I​

Answer 1

1. Reactivity Series

2. Precipitate

3. True

4. Ion-exchange reaction

5. NaCl

1. It is the type of reaction in which a highly reactive element displaces another element from a compound of lower reactivity in its salt solution

Eg of metal displacement: Fe (iron nail) + CuSO₄ → FeSO₄ (Green sol) + Cu (Solid)

Eg of non-metal displacement

2KBr + Cl₂ → 2KCl + Br₂

2. Look at the attachment

3.

i) Displacement reaction

ii) Double displacement reaction

iii) Displacement reaction

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