Hydrogen practice · Medium

Calculate the normality of 10 volume ${H}_2 {O}_2$ ?

In solid hydrogen the intermolecular bonding is

${\mathrm{H}_2}{\mathrm{O}_2}$ restores the colour of old lead paintings,blackened by the action of ${\mathrm{H}_2}\mathrm{S}$ gas,by:

The catalyst used in Bosch process of manufacture of ${H_2}$ is

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of Hydrogen evolved is

Assertion : We feel cold on touching the ice.

Reason : Ice is a solid form of water.

On shaking ${\mathrm{H}_2}{\mathrm{O}_2}$ with acidified potassium dichromate and ether, ethereal layer becomes

Both temporary and permanent hardness are removed on boiling water with

Metal which does not react with cold water but evolves ${H_2}$ with steam is:

A molten ionic hydride on electrolysis gives

What is formed when calcium carbide reacts with Heavy water

Tailing of mercury is a laboratory test for:

Which of the following is the laboratory method of preparation of dihydrogen?

Hydrogen gas will not reduce:

The $O - O - H$ bond angle in ${H_2}O$ is

Which one of the following is used for laboratory preparation of ${D_2}{O_2}$

Hydrogen peroxide oxidises ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{4 - }}$ to ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{3 - }}$ in acidic medium but reduces ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{3 - }}$ to ${\left[ {Fe{{\left( {CN} \right)}_6}} \right]^{4 - }}$ in alkaline medium. The other products formed are, respectively.

Ordinary hydrogen at room temperature is a mixture of

The best explanations for not placing hydrogen with the group of alkali metals or halogens is:

To an aqueous solution containing ions such as $A{l^{3 + ,}}Z{n^{2 + ,\,}}C{a^{2 + ,\,}}F{e^{3 + ,}}N{i^{2 + ,}}B{a^{2 + }}\,and\,\,C{u^{2 + }}$ conc. $HCl$ was added followed by ${H_2}S$ . The total number of cations precipitated during this reaction is/are

The in correct statement(s) about heavy water is (are)
A) used as a moderator in nuclear reactor.
B) obtained as a by-product in fertiliser industry.
C) used for the study of reaction mechanism.
D) has a higher dielectric constant than water.
Choose the correct answer from the options given below:

The molarity of pure water at $4^\circ C$ is:

${XH}_2$ (ion exchange resin) can replace ${Ca}^{+2}$ ions in hard water as ${XH}_2+{Ca}^{+2} \longrightarrow {XCa}+2 {H}^{+}$. If $1 \mathrm{~L}$ hard water after passing through ${XH}_2$ has a $\mathrm{pH}=4$ then hardness in parts per million of ${Ca}^{+2}$ is

When a substance '$A$' reacts with water, it produces a combustible gas ' ${B}$ ' and a solution of substance ' ${C}$ ' in water. while another substance ' $D$ ' reacts with solution of $'C'$ to produce the same gas $'B'$ on warming while ' ${D}$ ' can produce gas ' ${B}$ ' on reaction with dilute ${H}_2 {SO}_4$ at room temperature. '$A$' imparts a deep golden yellow colour to a smokeless flame on Bunsen burner. Identify $'A', 'B', 'C'$ and ' ${D}$ ' respectively are

The starting material for convenient preparation of deuterated hydrogen peroxide $\left(\mathrm{D}_{2} \mathrm{O}_{2}\right)$ in laboratory is

Given below are two statements.
One is labelled as assertion (A) and the other is labelled as Reason (R).
Assertion (A) Heavy water is used for the study of reaction mechanism.
Reason (R) The rate of reaction for the cleavage of $O - H$ bond is slower than the of $O - D$ bond.
Choose the most appropriate answer from the options given below.

Which of the following statements is correct? Dielectric constant of ${\mathrm{H}_2}{\mathrm{O}_2}$

The ionization energy of hydrogen is:

Ortho and parahydrogen differ in

If percentage strength of ${H_2}{O_2}$ solution is 17% then the volume strength of ${H_2}{O_2}$ solution will be