Which of the following does not show the anomalous behaviour of Lithium-Lithium reacts with nitrogen to form a nitrideLithium nitrate gives - NO-2- on heatingLithium carbonate decomposes on heatingLithium is the strongest reducing agent

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Standard XII

Chemistry

Anomalous Behavior of Lithium Halogens

Which of the ...

Question

Which of the following does not show the anomalous behaviour of Lithium?

Lithium reacts with nitrogen to form a nitride

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Lithium carbonate decomposes on heating

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Lithium nitrate gives

N O_{2}

on heating

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Lithium is the strongest reducing agent

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Solution

The correct option is D Lithium is the strongest reducing agent
Anomalous behavior of lithium is due to extremely small size of lithium. Its cation on account of small size and high nuclear charge, lithium exerts the greatest polarizing effect out of all alkali metals on the negative ion. Consequently, lithium ion possesses a remarkable tendency towards solvation and develops a covalent character in its compounds.

But lithium like other metals of the same group is a strong reducing agent. In fact, Lithium is the strongest reducing agent in aqueous solution.

Thus option D is correct.

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Similar questions

Choose the correct answer :

(a) The nitrate salt which does not give a mixture of $N O_{2}$ and $O_{2}$ on heating is :

(i) $A g N O_{3}$ , (ii) $K N O_{3}$ ,

(iii) $C u (N O_{3})_{3}$ , (iv) $Z n (N O_{3})_{2}$ .

(b) The chemical used in the brown ring test is :

(i) $C u S O_{4}$ , (ii) $F e S O_{4}$

(iii) $F e_{2} (S O_{4})_{3}$ (iv) $Z n S O_{4}$ .

(i) NO, (ii) $N_{2} O,$

(iii) $N O_{2}$ (iv) $N_{2} O_{5}$ .

From the following list of substances. choose one substance in each case which matches the description given below :

Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate. zinc carbonate.

(a) A nitrate which gives off only oxygen when heated.

(b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam.

Q. From the following list of substances, choose one substance in each case which matches the description given below: [4 MARKS]
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate
(a) A nitrate which gives out only oxygen when heated.
(b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam.
(c) A nitrate which gives off oxygen and nitrogen dioxide when heated.

Q. Which nitrate will decompose to give

N O_{2}

on heating?

Name:

(a) A carbonate which does not decompose on heating.

(b) A nitrate which produces oxygen as the only gas.

(d) A nitrate which produces brown gas on heating.

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