Physical and Chemical Properties of Hydrogen

Q. In a hydrogen molecule, when the spins are in the same direction. What is it known as?

1. para hydrogen
2. ortho hydrogen
3. adsorbent hydrogen
4. nascent hydrogen

Q. The Hybridisation of O atom in $H_{2}O$ is .

1. $ds{p}^2$
2. $s{p}^3$
3. $sp$

Q.

Hydrogen will not reduce

1. Heated cupric oxide

2. Heated ferric oxide

3. Heated stannic oxide

4. Heated aluminium oxide

Q.

The correct decreasing order of reactivity among the following is

1. Molecular hydrogen > Nascent hydrogen > atomic hydrogen

2. Nascent hydrogen > atomic hydrogen > molecular hydrogen

3. Atomic hydrogen > nascent hydrogen > molecular hydrogen

4. Atomic hydrogen > molecular hydrogen > nascent hydrogen

Q. Which of the following metals cannot liberate hydrogen from dilute HCl?

1. Cu
2. Zn
3. Mg
4. Fe

Q. Electron deficient molecular hydride is:

1. 
2. 
3. 
4. 

Q. Which of the following is/are physical property/ies of hydrogen gas?

1. colourless
2. odourless
3. tasteless
4. heavier than air

Q. The bond dissociation enthalpy of a hydrogen gas molecule is the least for a single bond between two atoms of any element.

1. True
2. False

Q.

Maximum number of hydrogen bonds per molecule in water is:

1. 3

2. 1

3. 2

4. 4

Q.

The set of elements each of which could form stable, covalent, hydrogen-bonded hydrides is:

1. Nitrogen, oxygen, and fluorine

2. Lithium sodium, and potassium

3. Sulphur, selenium, and tellurium

4. Chlorine, bromine, and iodine