Assertion (A) : Melting point and boiling point of ethanol are lower than that of sodium chloride.

Reason (R) : The forces of attraction between the molecules of ionic compounds are very strong.

Carbon and its Compounds

Bonding in Carbon

Options

(a)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of (A).

(b)Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of (A).

(c)Assertion (A) is true, but Reason (R) is false.

(d)Assertion (A) is false, but Reason (R) is true.

Official Answer

Melting point and boiling point of ethanol are lower than that of sodium chloride because ethanol is a covalent compound and the forces of attraction between the molecules of covalent compounds are weak. The forces of attraction between the molecules of ionic compounds are very strong, but this is not the reason for the lower melting point and boiling point of ethanol.

Analysis & Explanation

The assertion is true, but the reason is false. The forces of attraction between the molecules of ionic compounds are very strong, but this is not the reason for the lower melting point and boiling point of ethanol. The correct reason is that ethanol is a covalent compound and the forces of attraction between the molecules of covalent compounds are weak.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2023?

This question carries 1 mark in the CBSE Class 10 Science 2023 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Carbon and its Compounds" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Bonding in Carbon" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2023 paper?

This is a MCQ question from Section Section A in the CBSE Class 10 Science 2023 paper.