Properties of Hydrogen

Q.

The boiling point of oxygen is lower than that nitrogen.

1. True

2. False

Q. Hydrogen is not used in the meteorological balloon as it is:

1. Highly inflammable
2. Heavier than air
3. Lighter than air
4. Non-combustible

Q.

Hydrogen is liquid at room temperature.

True/False.

1. True

2. False

Q.

If c_p and c_v denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then

1) c_p-c_v = R/28

2) c_p-c_v =R/14

3) c_p-c_v = R

4) c_p-c_v = 28R

Q. Hydrogen is not used in the meteorological balloon as it is:

1. Highly inflammable
2. Lighter than air
3. Heavier than air
4. Non-combustible

Q.

If you take 4 balloons and fill one with $H_2$ gas, second one with $N_2$ gas, third one with $O_2$ gas and the last one with $C{l}_2$ gas. Then which balloon will rise the highest in the same time interval.

1. $H_2$

2. $O_2$

3. $C{l}_2$

4. $N_2$

Q. Hydrogen balloon rises up in the air because the density of hydrogen is ___.

1. lesser than air's density

2. greater than air's density

3. equal to air's density

4. None of the above

Q. Hydrogen gas cannot remain in the molecular form on Earth due to its low ______.

1. density
2. reactivity
3. flammability
4. toxicity

Q.

Hydrogen does not occur freely in nature; but in the sun and the other stars, free hydrogen is the chief constituent.Why

Q.

are atoms heavier than air?

Q.

Which of the following represents data for hydrogen?

1. 143 kJ/g

2. 33 kJ/g

3. 48 kJ/g

4. 23 kJ/g