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How many of the following salts show inc...

How many of the following salts show increase in solubility in water with increase in temperature?
i. `NaNO_(3)`
ii. `Li _(2) SO _(4)`
iii. `NH _(4) Cl`
iv.`AgNO _(3)`
v. `Ce _(2) (SO _(4)) _(3)`
vi. `KCl`
vii. `Na_(2) CO _(3). H _(2)O`

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The correct Answer is:
4
The solubilityof
`Na NO _(3), Ag NO _(3), KCl and NH _(4) Cl` increases with increase in temperature.
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