${\mathrm{CaH}}_2$ is commercially known as  .

Important Questions on The s-Block Elements

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-3>Q 16

$\mathrm{Ba}$ react with cold water vigorously $\mathrm{Mg}$ reacts slowly while $\mathrm{Be}$ has _____ with boiling water.

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Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-3>Q 17

A standard solution of sodium hydroxide cannot be prepared by direct weighing because it absorb _____ and ${\mathrm{CO}}_2$ from atmosphere.

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Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-4>Q 5

The alkali metals have low melting point. Which of the following alkali metal is expected to melt if the room temperature rises to $30°\mathrm{C}$?

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Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-4>Q 6

Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously?

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Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-4>Q 7

The reducing power of a metal depends on various factors. Suggest the factor which makes $\mathrm{Li}$, the strongest reducing agent in aqueous solution.

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Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-4>Q 8

Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?

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Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-4>Q 9

Which of the carbonates given below is unstable in air and is kept in ${\mathrm{CO}}_2$ atmosphere  to avoid decomposition. 

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Beta Question Bank for Engineering: Chemistry>Chapter 16 - The s-Block Elements>EXERCISE-4>Q 10

Metals form basic hydroxides. Which of the following metal hydroxide is the least basic?