Question 171 markMCQSection A

$Assertion (A) : Silver chloride turns grey in sunlight. Reason (R) : Decomposition of silver chloride into silver and chlorine takes place by sunlight.$

Q: Assertion (A) : Silver chloride turns grey in sunlight. Reason (R) : Decomposition of silver chloride into silver and chlorine takes place by sunlight.

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

Light — Reflection and Refraction

Reflection and Refraction

Options

(A)

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

(B)

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

(C)

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

(D)

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

Official answer

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

silver chloride

sunlight

decomposition

Marking scheme

1. $1 mark$

Hint

$Recall the chemical reaction that occurs when silver chloride is exposed to sunlight.$

Quick oral answer

$The assertion and reason are both true, and the reason is the correct explanation of the assertion. The decomposition of silver chloride into silver and chlorine takes place by sunlight, causing the silver chloride to turn grey.$

Common mistakes

1. $thinking that the assertion and reason are unrelated$

Analysis and explanation

The decomposition of silver chloride into silver and chlorine takes place by sunlight, which causes the silver chloride to turn grey. This is a chemical reaction that occurs when silver chloride is exposed to sunlight.

Interesting facts

$Silver chloride is a light-sensitive compound that decomposes when exposed to sunlight.$

Question details

Q17 of 39 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2025
Section: Section A
Marks: 1
Type: MCQ
Chapter: Light — Reflection and Refraction
Topic: $Reflection and Refraction$
Bloom's level: Remembering
Syllabus topic: $Reflection and Refraction$

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Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2025?$

$This question carries 1 mark in the CBSE Class 10 Science 2025 examination.$

$Which chapter does this question come from in Science?$

$This question is from the chapter "Light — Reflection and Refraction" in the CBSE Class 10 Science syllabus.$

$What topic does this question cover in Science?$

$This question covers the topic "Reflection and Refraction" from CBSE Class 10 Science.$

$What type of question is this in the CBSE Class 10 Science 2025 paper?$

$This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.$