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Liquid hydrogen has a much higher specific energy than LPG, natural gas, and liquid octane.

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Important Questions on Hydrogen

EASY
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R 

Assertion A: Hydrogen is an environment friendly fuel.

Reason R: Atomic number of hydrogen is 1 and it is a very light element.
In the light of the above statements, choose the correct answer from the options given below

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Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Which of the following is NOT true regarding the usage of hydrogen as a fuel?
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Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Which of the following acts as oxidising agent in hydrogen- oxygen fuel cell?
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Among the fuels given, the fuel with the highest calorific value kJ/mole is
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
What are advantages of using hydrogen as a fuel over gasoline or coal?
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Why is fuel cell not being used as a source of energy on a large scale?
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Why is hydrogen considered a good fuel?
HARD
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel

Liquid H2 is used as rocket fuels.

EASY
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
The correct statements among (a) to (d) regarding H2 as a fuel are:

a It produces less pollutants than petrol

b A cylinder of compressed dihydrogen weighs ∼30 times more than a petrol tank producing the same amount of energy

c Dihydrogen is stored in tanks of metal alloys like NaNi5

d On combustion, values of energy released per gram of liquid dihydrogen and LPG are 50 and 142 kJ , respectively
 
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
When 10 g of methane is completely burnt in oxygen, the heat evolved is 560 kJ. What is the heat of combustion (in kJ mol-1) of methane?
HARD
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel

Give reason for the following:

Hydrogen gas can prevent pollution.

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Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
What is understood by hydrogen economy?
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Write some important uses of hydrogen.
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
In a hydrogen- oxygen fuel cell, combustion of hydrogen occurs to
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel

Consider the following statements regarding the hydrogen economy:

1. The main aim of a hydrogen economy is to transmit energy in the form of hydrogen, not as electric power.

2. Hydrogen as a fuel has many advantages over conventional fuel in that, it is not polluting, and it can be stored and transported easily.

Which of the statements given above is/are correct?

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Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Explain the use of hydrogen as a fuel.
 
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
State five uses of hydrogen.
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Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
What are advantages in using hydrogen as fuel?
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Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Cotyledons are also called-
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Chemistry>Inorganic Chemistry>Hydrogen>Dihydrogen as a Fuel
Hydrogen and Methane are the major constituents of which fuel gas?