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Reactivity with Halogens and Hydrogen (Group 2)

Which is not ...

Question

Which is not correctly matched ?
(i) Basic strength of oxides: $C s_{2} O < R b_{2} O < K_{2} O < N a_{2} O < L i_{2} O$
(ii) Stability of peroxides: $N a_{2} O_{2} < K_{2} O_{2} < R b_{2} O_{2} < C s_{2} O_{2}$
(iii) Stability of bicarbonates: $L i H C O_{3} < N a H C O_{3} < K H C O_{3} < R b H C O_{3} < C s H C O_{3}$
(iv) Melting point: $N a F < N a C l < N a B r < N a I$

(i) and (iv)

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(i) and (iii)

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(i) and (ii)

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(ii) and (iii)

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Solution

The correct option is A (i) and (iv)
Basic strength of oxides decreases down the group due to larger radii of ions.
As mass of halide increases, boiling point increases. So boiling point in correct order is $N a F < N a C l < N a B r < N a I$ .
Also stability of peroxides and carbonates decreases down the group.

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Similar questions

C s_{2} O < R b_{2} O < K_{2} O < N a_{2} O < L i_{2} O

N a_{2} O_{2} < K_{2} O_{2} < R b_{2} O_{2} < C s_{2} O_{2}

L i H C O_{3} < N a H C O_{3} < K H C O_{3} < R b H C O_{3} < C s H C O_{3}

N a F < N a C l < N a B r < N a I

\to C s_{2} O < R b_{2} O < K_{2} O < N a_{2} O < L i_{2} O

\to N a_{2} O_{2} < K_{2} O_{2} < R b_{2} O_{2} < C s_{2} O_{2}

\to L i H C O_{3} < N a H C O_{3} < K H C O_{3} < R b H C O_{3} < C s H C O_{3}

\to N a F < N a C l < N a B r < N a I

C s_{2} O < R b_{2} O < K_{2} O < N a_{2} O < L i_{2} O

N a_{2} C O_{3} < K_{2} C O_{3} < R b_{2} C O_{3} < C s_{2} C O_{3}

L i H C O_{3} < N a H C O_{3} < K H C O_{3} < R b H C O_{3} < C s H C O_{3}

N a F < N a C l < N a B r < N a I

C s_{2} O < R b_{2} O < K_{2} O < N a_{2} O < L i_{2} O

N a_{2} O_{2} < K_{2} O_{2} < R b_{2} O_{2} < C s_{2} O_{2}

L i H C O_{3} < N a H C O_{3} < K H C O_{3} < R b H C O_{3} < C s H C O_{3}

N a F < N a C I < N a B r < N a I

(1) Basic strength of oxides : C s_{2} O < R b_{2} O < N a_{2} O < L i_{2} O

(2) Stability of peroxides : N a_{2} O_{2} < K_{2} O_{2} < R b_{2} O_{2} < C s_{2} O_{2}

(3) Stability of bicarbonates : L i H C O_{3} < N a H C O_{3} < K H C O_{3} < R b H C O_{3} < C s H C O_{3}

(4) Melting point : N a F < N a C l < N a B r < N a I

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