Uses of Hydrogen

Q.

Give reasons for the following statement:

The Helium-Oxygen mixture is used by deep-sea divers.

Q.

Which of the following gases is used in the treatment of cancer and radioactive research?

1. Xenon

2. Helium

3. Radon

4. Neon

Q.

Write the uses of inert gases.

Q. Prove that PV=nRT for one mole of gas

Q.

Helium gas is used in filling weather balloons.

1. True
2. False

Q.

Correct the following statements :

(a) Hydrogen is used as a fuel for rocket propulsion.

(b) All metals react with acids to give hydrogen.

(c) Metals adsorb hydrogen.

(d) Very dilute nitric acid reacts with zinc to produce hydrogen.

(e) $Conc.H_{2}S{O}_4$ reacts with zinc to liberate hydrogen.

Q.

76 (i) Name the inert gas which is used for filling weather observation balloons

Q.

Identify the inert gas among the following.

1. Argon

2. Nitrogen

3. Oxygen

4. Carbon dioxide

Q.

Enlist the use of inert gases.

Q.

State one property of hydrogen that makes it a good fuel.

Q.

32. Helium is used to fill air balloons.

1. True
2. False

Q.

Hydrogen in _______state along with oxygen is used as rocket fuel.

Q.

Which of the following metals reacts with steam or acids to release Hydrogen?

1. Zinc $\left(\mathrm{Zn}\right)$

2. Platinum(Pt)

3. Silver(Ag)

4. Gold(Au)

Q. If total number of elements that exist in gaseous state at room temperature is ‘X’, then the value of ‘X – 1’ will be

यदि कक्ष ताप पर गैसीय अवस्था में पाये जाने वाले तत्वों की कुल संख्या ‘X’ हो, तो ‘X – 1’ का मान होगा

1. 9
2. 11
3. 10
4. 12

Q.

State one property of hydrogen due to which it is no longer used in meteorological balloons.

Q.

A noble gas used in advertising sign boards is

1. helium

2. neon

3. argon

4. krypton

Q.

8. Assertion (A): Many fuel gases contain hydrogen as a major constituent.

Reason (R): Liquid hydrogen is a very light fuel.

1. Both (A) and (R) are true and (R) is the correct explanation for (A).

2. Both (A) and (R) are true but (R) is not the correct explanation for (A).

3. (A) is correct but (R) is false

4. (A) is false but (R) is true.

Q. Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

1. Carbon dioxide and methane
2. Oxygen and acetylene
3. Hydrogen and oxygen
4. Methane and air

Q. Why do $3517Cl$ and $3717Cl$ have the same chemical properties? In what respect do these atoms difer?

[TEXTBOOK QUESTION-VII(2)]

Q. (i) $F_2$ has lower bond dissociation enthalpy than $C{l}_2$. Why?
(ii) Which noble gas is used in filling balloons for meteorological observations?
(ii) Complete the following equations?
$Xe{F}_2+P{F}_5\to$

Q.

how coal gas was used to illuminate street lights?