Test: General Characteristics of Alkali Metals - JEE MCQ

The heats of hydration of the dipositive alkaline earth metal decrease with an increase in their ionic size

forms on heating

Hydration of alkali metal ion is less than that of IIA group

Alkaline earth metal ions, because of their much larger charge to size ratio, exert a much stronger electrostatic attraction on the oxygen of water molecule surrounding them

hydrolysis of

hydrolysis of

hydrolysis of both and ions

None of these

Crystal loses water

Crystal absorbs moisture and

Crystal melts

Crystal sublimes

and

and

and

and

litmus solution.

dil. acid

the sulphur atoms are at unstable oxidation state of

the two sulphur atoms are at different oxidation states of and

the S-S bond are unstable bonds.

sulphur is in zero oxidation state.

Soda ash -

Carnallite - (KCl. )

Borax -

Glauber's salt -

both in cationic and anionic parts

there is no zinc left in the solution

cationic part

anionic part.

Alkali metals are soft and have comparatively low melting points as compared to other metals

Francium is a radioactive element

Alkali metals are strongly reducing agents

Sodium is used in the photoelectric cells

Solubilities of alkali metal carbonates and also of bicarbonates increase down the group

Alkali metals form covalent hydrides with when heated

Alkali metals in liquid ammonia imparts deep blue solution

Alkali metals in liquid ammonia exist as ammoniated cations and solvated electrons

concentrated solution of

concentrated solution of

concentrated solution of

concentrated solution of