Inorganic Chemistry

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Q1. Which of the following is the most abundant element in the universe? (2020)

Solution:

Hydrogen is the most abundant element in the universe, making up about 75% of its elemental mass.

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Q2. Which isotope of hydrogen is also known as deuterium? (2021)

Solution:

Deuterium is the isotope of hydrogen with one neutron, also referred to as Hydrogen-2.

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Q3. Which of the following is the most abundant isotope of hydrogen? (2023)

Solution:

Protium, which has no neutrons, is the most abundant isotope of hydrogen, making up about 99.98% of hydrogen found in nature.

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Q4. What is the main product when hydrogen reacts with oxygen? (2019)

Solution:

When hydrogen reacts with oxygen, the main product formed is water (H2O).

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Q5. Which isotope of hydrogen is also known as heavy hydrogen? (2020)

Solution:

Deuterium is known as heavy hydrogen because it has one neutron in addition to the single proton.

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Q6. What is the main product formed when hydrogen reacts with oxygen? (2019)

Solution:

When hydrogen reacts with oxygen, the main product formed is water (H2O).

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Q7. What is the main method of hydrogen production in the laboratory? (2020)

Solution:

In the laboratory, hydrogen is commonly produced by the reaction of metals (like zinc) with acids.

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Q8. Which of the following compounds is a hydrogen halide? (2022)

Solution:

Hydrogen chloride (HCl) is a hydrogen halide, which is a binary compound of hydrogen and a halogen.

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Q9. What is the bond angle in the water molecule (H2O)? (2023)

Solution:

The bond angle in a water molecule is approximately 104.5 degrees due to the bent shape caused by lone pairs on oxygen.

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Q10. Which of the following compounds contains hydrogen in a negative oxidation state? (2021)

Solution:

In sodium hydride (NaH), hydrogen has an oxidation state of -1.