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Which of the alkali metals is lighter th...

Which of the alkali metals is lighter than water?

A

k

B

Na

C

Li

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
D
On account of large atoms which are less closely packed, alkali metals have remarkably low densities in coparison to other metals. Li metal is only about half as densities in comparison to other metals. Li metal is only about half as densas water `(0.54g cm^(-3)`, while Na and K are slightly less dense than water (0.97 and 0.86 g `cm^(-3)`).
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Knowledge Check

  • Which of the following gas is lighter than air ?

    A
    HCl
    B
    `H_(2)S`
    C
    `NH_(3)`
    D
    HF

  • Which of the following gas is lighter than air?

    A
    HCI
    B
    `H_2 S`
    C
    `NH_3`
    D
    `HF`

  • Ice is lighter than water due to

    A
    Lattice aggregates occupy more space
    B
    Cold water is extremely dense
    C
    Absence of hydrogen bonds in ice
    D
    Absence of lattice aggregates in ice.

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    Statement-1: The hydrogen carbonates of the alkali metals are soluble in water, but are less soluble than the corresponding normal carbonates. Statement-2: The hydrogen carbonates of the alkali metals have H-bonding.

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