Inert Gas and Their Uses

Q.

Why are bulbs filled with inert gases such as Nitrogen or Argon?

1. To prevent oxidation of Tungsten filament.

2. To prevent dehydration of Tungsten filament.

3. To prevent oxidation of Steel filament.

4. None

Q. Which of these is a noble gas?

1. Argon
2. Chlorine
3. Fluorine
4. Oxygen

Q.

Find the odd one out. Give a reason for your answer.

Hydrogen, Oxygen, Nitrogen, and Helium

Q.

Argon is filled in a light bulb to increase the life of the filament of light bulbs.

1. True

2. False

Q.

Explain the cause of the inertness of noble gases.

Q.

Argon is used in arc welding because of its

1. Flammability

2. Low reactivity with metal

3. High calorific value

4. Ability to lower the melting point of metal

Q.

Can humans breathe liquid oxygen?

Q.

Helium, a noble gas has eight electrons in its valence shell.

1. True
2. False

Q. Why neon is used in advertising glow tunes?

Q.

Dihydrogen under certain reaction conditions combines with all elements except ____________.

Q.

Which noble gas is radioactive in nature?

Q.

Which inert gas is usually filled in balloons?

1. Neon

2. Argon

3. Helium

4. Radon

Q.

What do you mean by Chalcogens in the periodic table?

Q.

Which inert gas is used for filling electric bulbs so as to provide an inert atmosphere to the heating filament?

1. He

2. Ar

3. Rn

4. Ne

Q.

Name a gas which is used in balloons and it rises

Q.

Which radioactive inert gas is used for cancer treatment?

1. He

2. Ar

3. Ne

4. Rn

Q.

Name the gases used in:

(a) filling ballons

(b) Light bulbs

(c) bright colored advertising light works.

Q.

Potato chip packets are flushed with oxygen gas when packed.

1. True
2. False

Q.

Noble gases are devoid of chemical reactions. Why?

Q.

Write one property and one use of bone charcoal.

Q.

Give any three characteristics of noble gases.

Q. The gas used for inflating the tyres of aeroplanes :

1. $Ar$
2. $He$
3. $N_2$
4. $H_2$

Q.

State any four physical properties of oxygen gas.

Q.

(Argon / Radon) is used in the treatment of cancer.

Q.

Give reason for the following:

The newly opened car perfume can be smelt in every corner inside of the car.

Q. Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture, because :

1. helium is much less soluble in blood than nitrogen
2. due to high pressure nitrogen reacts with oxygen to give poisonous nitric oxide
3. nitrogen is much less soluble in blood than helium
4. nitrogen is highly soluble in water

Q.

Neon is used for making signboards because___.

1. Light is emitted when a high voltage current is passed

2. Light is absorbed by it

3. It is inert and does not react

4. It is abundant in the atmosphere

Q. Write the general electronic configuration of noble gas group. Which element of this group is useful in magnetic resonance imaging (MRI)?

Q.

76 (iv) Name the gas which is used in advertising sign boards.

Q. Helium is used in balloons instead of $H_2$ because:

1. it is lighter
2. it is heavier
3. it is inert
4. it is non-inflammable