Inorganic Chemistry - Block Elements

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Q1. Which of the following is the most abundant alkaline earth metal in the Earth's crust? (2019)

Solution:

Calcium (Ca) is the most abundant alkaline earth metal in the Earth's crust.

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Q2. What is the common oxidation state of alkaline earth metals? (2019)

Solution:

Alkaline earth metals typically exhibit a common oxidation state of +2.

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Q3. Which of the following is not an alkaline earth metal? (2020)

Solution:

Aluminum (Al) is not an alkaline earth metal; it is a post-transition metal.

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Q4. Which of the following alkaline earth metals reacts vigorously with water? (2019)

Solution:

Calcium reacts vigorously with water to form calcium hydroxide and hydrogen gas.

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Q5. Which of the following has the lowest melting point among the alkali metals? (2019)

Solution:

Potassium (K) has the lowest melting point among the alkali metals.

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Q6. What is the primary use of lithium in batteries? (2023)

Solution:

Lithium is primarily used as an anode material in lithium-ion batteries due to its high electrochemical potential.

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Q7. Which alkali metal is known for its vigorous reaction with water? (2022)

Solution:

Potassium (K) reacts vigorously with water, producing potassium hydroxide and hydrogen gas.

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Q8. What is the primary characteristic of alkaline earth metals? (2020)

Solution:

Alkaline earth metals typically have a +2 oxidation state due to the loss of two electrons.

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Q9. Which of the following is the most electropositive element? (2021)

Solution:

Rubidium (Rb) is the most electropositive element among the given options.

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Q10. Which of the following elements is not an alkaline earth metal? (2023)

Solution:

Aluminum (Al) is not an alkaline earth metal; it is a post-transition metal.