Chemistry 12 Chapter 8 Exemplar Solutions the P and F Block Elements Part 7

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V. Assertion and Reason Type

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

(i) Both assertion and reason are true, and reason is the correct explanation of the assertion.

(ii) Both assertion and reason are true but reason is not the correct explanation of assertion.

(iii) Assertion is not true but reason is true.

(iv) Both assertion and reason are false.

Question 59:

Assertion: iodide is not known.

Reason:

Answer: (i)

Question 60:

Assertion: Separation of and is difficult.

Reason: Because and lie in the same group of the periodic table.

Answer: (ii)

Question 61:

Assertion: Actinoids form relatively less stable complexes as compared to lanthanoids.

Reason: Actinoids can utilise their 5f orbitals along with orbitals in bonding but lanthanoids do not use their orbital for bonding

Answer: (iii)

Question 62:

Assertion: cannot liberate hydrogen from acids.

Reason: Because it has positive electrode potential.

Answer: (i)

Question 63:

Assertion: The highest oxidation state of osmium is .

Reason: Osmium is a block element.

Answer: (ii)