Hydrogen practice · Mixed difficulty

The weight percentage of deuterium in heavy water is:

The method used to remove temporary hardness of water is:

Hydrogen peroxide does not:

Determine the total number of neutrons in three isotopes of Hydrogen

The gas produced by the passage of air over hot coke is

The label on a bottle of ${H}_2 {O}_2$ solution reads as ' 10 volume'. The concentration of ${H}_2 {O}_2$ in percentage by volume is

Which hydride is neutral?

Zeolites are extensively used in:

In the preparation of hydrogenated oil the chemical reaction involving hydrogen is called:

The hardness of a water sample (in terms of equivalents of $CaC{O_3})$ containing ${10^{ - 3}}M\,CaS{O_4}$ (Molar mass of $CaS{O_4} = 136\,\,g\,\,mo{l^{ - 1}})$

In Bosch’s process which gas is utilised for the production of hydrogen gas?

Following are some properties of hydrogen. Which of the following properties resemble with alkali metals and which with halogens

(i) Hydrogen lose one electron to form unipositive ions

(ii) Hydrogen gain one electron to form uninegative ions

(iii) Hydrogen forms oxides, halides and sulphides

(iv) Hydrogen has a very high ionization enthalpy

(v) Hydrogen forms a diatomic molecule, combines with elements to form hydrides and covalent compounds.

$LiAl{H_4}$ Is widely used a reducing agent. In this hydride $Al$ is present in:

In one of these compounds does hydrogen have an oxidation state of $- 1$

Water is said to be permanently hard when it contains:

Assertion: The volume strength of a solution of hydrogen peroxide decreases with an increase in the hardness of the water.

Reason: The hardness of water is caused by the presence of ions of calcium and magnesium. These ions react with hydrogen peroxide and reduce its volume strength.

Assertion (A) : On passing $\mathrm{H}_2$ gas into aqueous $\mathrm{Fe}^{3+}$ solution, resulting solution gives test of $\mathrm{Fe}^{3+}$.

Reason (R): $\mathrm{H}_2(g)$ reduces $\mathrm{Fe}^{3+}$ to $\mathrm{Fe}^{2+}$ but $\mathrm{Fe}^{2+}$ is oxidised to $\mathrm{Fe}^{3+}$ by atmospheric oxygen.

The synonym for water gas when used in the production of methanol is

Which of the following equation depicts the oxidising nature of ${H_2}{O_2}$ ?

The product obtained in the given reaction is

${CaC}_2+{D}_2{O} \longrightarrow$

Radioactive elements emit $\alpha, \beta$ and $\gamma$ rays and are characterized by their half-lives. The radioactive isotope of hydrogen is

The number of radioactive isotopes of hydrogen is:

$\mathrm{H}_2 \mathrm{O}_2$ and heavy water was discovered by respectively:-

(A):CO from syn gas can be converted to $\mathrm{CO}_2$ by reacting with steam in the presence of $\mathrm{FeCrO}_4 \cdot 673 \mathrm{~K}$ or $\mathrm{Fe}_2 \mathrm{O}_3 / \mathrm{Cr}_2 \mathrm{O}_3 / 673 \mathrm{~K}$.

(R): The conversion of $\mathrm{CO}$ to $\mathrm{CO}_2$ using steam is called water gas shift

The bond energy of covalent O—H bond in water is:

Permanent hardness of water can be removed by

Which one of the following is used for reviving the
exhausted permutit?

$\mathrm{D}_{2} \mathrm{O}$ is used more in

Most common isotopes of hydrogen (non-radioactive) is