Hydrogen Quiz-1

Question 1

$HClO_4\;H_2O$ is

Accepted Answer

An ionic solid containing $ClO_4^-$ions

Answer

A covalent solid containing hydrogen bonded $H_2O$

Answer

An ionic solid containing $H^+$ions

Answer

A liquid

Question 2

When NaH reacts with water, the gas liberated is

Accepted Answer

hydrogen

Answer

oxygen

Answer

steam

Answer

ozone

Question 3

10 mL of $H_2O_2$ solution is treated with Kl and titration of liberated $l_2$, required 10 mL of 1 N hypo. Thus $H_2O_2$ is

Accepted Answer

All of these

Answer

1 N

Answer

5&ndash;6 volume

Answer

17 $gL^{-1}$

Question 4

30 volumes $H_2O_2$ means

Accepted Answer

$1\,cm^3$ of the solution liberates $30\,cm^3$ of $O_2$ at STP

Answer

30% $H_2O_2$

Answer

$30\,cm^3$ of the solution contains 1g of $H_2O_2$

Answer

$30\,cm^3$ of the solution contains one mole of $H_2O_2$

Question 5

In alkaline medium,$H_2O_2$ reacts with $Fe^{3+}$ and $Mn^{2+}$ respectively to give

Accepted Answer

$Fe^{2+}\text{ and } Mn^{4+}$

Answer

$Fe^{4+}\text{ and } Mn^{4+}$

Answer

$Fe^{2+}\text{ and } Mn^{2+}$

Answer

$Fe^{4+}\text{ and } Mn^{2+}$

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