The metals of group 1 in decreasing order of reactivity is :

Cs >Na > K > Li

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K > Cs >Na > Li

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Cs > K > Na > Li

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Li > Na > K > Cs

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Solution

The correct option is C Cs > K > Na > Li
As we move down the group, electronegativity and ionisation potential decreases so metal become more reactive so order is Cs > K > Na > Li.

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Similar questions

The correct order of reactivity of alkalimetals towards $H_{2}$ is

L i^{+}

N a^{+}

C s^{+}

Arrange the following as per instructions given in the brackets.

(a) Mg. Cl, Na, S, Si (decreasing order of atomic size)

(b) Cs, Na, Li, K, Rb (increasing metallic character)

(d) Cl, F, Br, I (increasing electron affinity)

(e) Cs, Na, Li, K, Rb (decreasing electronegativity)

L i < N a < R b < C s

F > C I > B r > I

C s, N a, L i, K, R b

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