The correct statement among the following regarding hydrogen is–

1. It can form a bond in +1 as well as –1 oxidation state

2. It is always collected at the cathode

3. It has a very low ionization potential

4. It has the same electronegativity as halogens

The most abundant isotope of hydrogen is-

1. Tritium

2. Deuterium

3. Protium

4. Para-hydrogen

The incorrect statement among the following regarding hydrogen is -

1. Hydrogen never acts as a cation in Ionic salts

2. Hydronium ion, H₃O⁺, exists freely in a solution

3. Dihydrogen does not act as a reducing agent

4. Hydrogen has three isotopes of which Protium is the most common

The first ionization energy value $\left(\mathrm{kJ}\right)$ ${\mathrm{mol}}^{-1}$ for $\mathrm{H},$ $\mathrm{Li},$ $\mathrm{F},$ $\mathrm{and}$ $\mathrm{Na}$ 

is given below but not in a correct order

$1681,$ $520,$ $1312,$ $495.$

The ionization energy value of H would be -

1. 1681                                 

2. 1312

3. 520                                   

4. 485

An isotope that is used as a tracer in a chemical reaction is-

1. ${\mathrm{H}}_1^1$

2. ${\mathrm{H}}_1^2$

3. ${\mathrm{H}}_1^3$

4. Ortho hydrogen

Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

1. Gamma $\left(\gamma \right)$

2. Neutron (n)

3. Beta $\left({\beta }^{-}\right)$

4. Alpha $\left(\alpha \right)$

The colour of hydrogen is –

1. Blue                           

2. Yellow

3. Orange                       

4. No colour

When substance A reacts with water, it produces a combustible gas B and a solution of substances 'C' in water. When another substance 'D' reacts with this solution of C, it produces the same gas 'B' on warming but 'D' can produce gas 'B' on reaction with dilute sulphuric acid at room temperature. 'A' imparts a deep golden yellow colour to a smokeless flame of a bunsen burner. A, B, C and D respectively are -

1. $\mathrm{Na},$ ${\mathrm{H}}_2,$ $\mathrm{NaOH},$ $\mathrm{Zn}$                              

2. $\mathrm{K},$ ${\mathrm{H}}_2,$ $\mathrm{KOH},$ $\mathrm{Al}$

3. $\mathrm{Ca},$ ${\mathrm{H}}_2,$ $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2,$ $\mathrm{Sn}$                           

4. ${\mathrm{CaC}}_2,$ ${\mathrm{C}}_2{\mathrm{H}}_2,$ $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2,$ $\mathrm{Fe}$

Hydrogen combines directly with:

1. Ca

2. Cu

3. Zn

4. Fe

The correct classification of H₂O, B₂H₆, and NaH respectively is-

1. Covalent, Covalent, & Covalent.

2. Covalent, Covalent, & Ionic.

3. Covalent, Ionic, & Covalent.

4. Interstitial, Covalent, & Covalent.