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Soaps and Detergents

Which of the ...

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Which of the following hydrated ions has the smallest size?
1 Cs+
2 Rb+
3 Na+
4 K+

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Q. Arrange the following in the iIncreasing hydrated ion size:

{C s}_{a q}^{+} < {R b}_{a q}^{+} < K_{a q}^{+} < {N a}_{a q}^{+}

If true enter 1, else enter 0.

Q. Assertion :Size of the hydrated ion is in order

L i^{+} > N a^{+} > K^{+} > R b^{+} \geq C s^{+}

which is just reverse of ionic size Reason: Greater the charge or charge density, smaller the ionic size, greater the hydration hence, greater the size of the hydrated ion.

Q. Consider the following statements:
1.

C s^{+}

is more highly hydrated than the other alkali metal ions.
2. Among the alkali metals

L i, N a, K

R b

, lithium has the highest melting point.
3. Among the alkali metals only lithium forms a stable nitride by direct combination.
Out of these statements:

The correct order of reactivity of alkalimetals towards $H_{2}$ is

Q. Consider the following statements :
(I)

C s^{+}

ion is more highly hydrated than other alkali metal ions.
(II) Among the alkali metals

L i, N a, K,

R b, L i

has the higher melting point.
(III) Among the alkali metals, only

L i

forms a stable nitride by direct combination.

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