Tag: introduction to hydrogen

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Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

Which of the following statements are not true for hydrogen?

  1. It exists as diatomic molecule

  2. It has one electron in the outermost shell

  3. It can lose an electron to form a carbon which can freely exist

  4. It forms a large number of ionic compounds by losing an electron
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation

The electronic configuration of the Hydrogen atom is $1s^1$.

It has one electron in the outermost shell. It exists as a diatomic molecule $(H _2)$ by sharing its' electron with other hydrogen atom.

It cannot form ionic compounds because it cannot donate its' electron and can only form covalent compounds by sharing the electron. It cannot lose an electron to form a cation because the hydrogen atom cannot exist after losing an electron.

Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

In which of the following way, the transportation of hydrogen gas do not take place?

  1. Liquid

  2. Gas

  3. Compressed gas

  4. Pressurized gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The transportation of hydrogen gas is done in heavy metal cylinders and it can also be transported in liquid form. In order to transport large amounts of hydrogen it must be either pressurized and delivered as a compressed gas, or liquefied.

Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

$H _2$ is best alternative to fossil fuels but use of hydrogen as a fuel is dangerous because:

  1. it is chemically unstable.
  2. the storage of $H _2$ is very risky and can causes explosion.

  3. it is very expensive.

  4. it causes the corrosion of containers in which it is present
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$H _2$ is best alternative to fossil fuels but use of hydrogen as a fuel is dangerous because the storage of $H _2$ is very risky and causes explosion because of low ignition energy.

Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

In hydrogen economy, energy required for automobiles or electrical energy is obtained from the reaction between _____ and oxygen.

  1. hydrogen

  2. oxygen

  3. silver

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In hydrogen economy, energy required for automobiles or electrical energy is obtained from the reaction between hydrogen and oxygen.
This eliminates the use of carbon based fossil fuels. It reduces emission of carbon dioxide gas. Hydrogen acts as energy carrier as a substitute for petroleum reserves that are in short supply.

Multiple choice chemistry non-metals dihydrogen fuel dihydrogen as a fuel introduction to hydrogen

Hydrogen can be prepared on commercial scale by different methods. In its preparation by the action of steam on hydrocarbons, a mixture of $CO$ and $H _2$ gas is formed called:

  1. water gas

  2. syngas

  3. producer gas

  4. industrial gas
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mixture of $CO$ and ${ H } _{ 2 }$ is called water gas. As the mixture of $CO$, $CO _2$ and ${ H } _{ 2 }$ is used for the synthesis of methanol and a no. of hydrocarbon, it is also called synthesis gas or 'syngas'.