EASY
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Lithium compounds are covalent in nature. Why?

Important Questions on Alkali Metals

EASY
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salt are put under an electric field?
EASY
Which of the following elements mostly form covalent compounds?
MEDIUM
Which among the following alkali metal chloride crystallizes in form of hydrate?
MEDIUM
Among the statements a-d, the correct ones are:
(a) Lithium has the highest hydration enthalpy among the alkali metals.
(b) Lithium chloride is insoluble in pyridine.
(c) Lithium cannot form ethynide upon its reaction with ethyne.
(d) Both lithium and magnesium react slowly with H2O .
EASY
Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect is:
EASY
Which of the following alkali metal nitrates on heating decomposes to give NO2 gas?
EASY
Which of the following alkali metals does not form ethynide?
MEDIUM
The aqueous solutions of lithium salts are poor conductors of electricity rather than other alkali metals because of which of the following reasons?
EASY
Lithium is diagonally related to magnesium. The correct reason for this is:
MEDIUM
Li has the following abnormal behaviour in its group:
HARD
Which of the following represents a correct sequence of reducing power of the following elements ?
MEDIUM
Li does not resemble with other alkali metals in the following properties
MEDIUM
Which of the following set contains pair of elements that do not belong to same group but show chemical resemblance?
EASY
Which of the following are the correct reasons for anomalous behaviour of lithium?

(i) Exceptionally small size of its atom

(ii) Its high polarising power

(iii) It has low degree of hydration

(iv) Exceptionally low ionisation enthalpy
EASY
Chemical properties of Li and Mg are similar because :
MEDIUM
Li does not resemble with other alkali metals in following properties
MEDIUM
The ion which shows maximum value of hydration energy is: