Hydrogen practice · Mixed difficulty

Which of the following metals absorbs Hydrogen

Which of the following explanation is best for not placing Hydrogen with alkali metals or halogen

Which cannot be oxidised by ${\mathrm{H}_2}{\mathrm{O}_2}$?

Ionic hydrides are formed by

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.

Hydrogen is evolved by the action of cold dilute $\mathrm{HN}{\mathrm{O}_3}$ on:

Zeolites are extensively used in:

When same amount of Zinc is treated separately with excess of sulphuric acid and excess of $NaOH$ solution, the ratio of Hydrogen evolved is

Hard water is not fit for washing clothes because

In which of the following reactions, ${H_2}{O_2}$ acts as a reducing agent

The concentration of ${\mathrm{H}_2}{\mathrm{O}_2}$ solution of ‘10 volume’ is

Radioactive isotope of hydrogen is

The pair that yields the same gaseous product on reaction with water:

Which of the following is used as a moderator in nuclear reactors.

Permutit is the technical name given to

Exhausted cation exchange resin is regenerated by using solution of

Which substance does not speed up decomposition of ${\mathrm{H}_\mathrm{2}}{\mathrm{O}_\mathrm{2}}$

$1000 \mathrm{~g}$ aqueous solution of ${CaCO}_3$ contains $18 \, \mathrm{mg}$ of ${CaCO}_3$ of the solution is

Hydrogen is formed according to the equation $2 \mathrm{Na}+2 \mathrm{H}_2 \mathrm{O} \rightarrow 2 \mathrm{NaOH}+\mathrm{H}_2$. How many grams of sodium are required to produce $7.81 \mathrm{~g}$ of $\mathrm{H}_2$?

The products obtained during treatment of hard water using Clark’s method are:

Which of the following could act as a propellant for rockets?

Electrolysis of $X$ gives $Y$ at anode. Vacuum distillation of $Y$ gives ${\mathrm{H}_2}{\mathrm{O}_2}$. The number of peroxy (O - O) bonds present in $X$ and $Y$ respectively are

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.

The normality of 30 volume ${\mathrm{H}_2}{\mathrm{O}_2}$ is

When ${\mathrm{H}_\mathrm{2}}{\mathrm{O}_\mathrm{2}}$ is added to acidified potassium dichromate, a blue colour is produced due to formation of

(A):I.E. ofH atom is comparable with halogen

(R): $\mathrm{H}$-atom is much larger in size than alkali metals

Identify the incorrect statement regarding ${D_2}O$

Heavy water is qualified as heavy because it is:

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

Volume strength of 1N ${H_2}{O_2}$ is