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Science · 2023 · 3 marks
CBSE 2023 · Region 2 · Set 1 · Q27
Silver chloride kept in a china dish turns grey in sunlight. (a) Write the colour of silver chloride when it was kept in the china dish. (b) Name the…
Silver chloride kept in a china dish turns grey in sunlight.
(a)
Write the colour of silver chloride when it was kept in the china dish.
(b)
Name the type of chemical reaction taking place and write the chemical equation for the reaction.
(c)
State one use of the reaction. Name one more chemical which can be used for the same purpose.
Marking-scheme solution
(a) White
(b) Decomposition reaction / Photolytic decomposition
\[2 \mathrm{AgCl} \xrightarrow{\text { Sunlight }} 2 \mathrm{Ag}+\mathrm{Cl}_{2}
\]
(c) used in black and white photography ; AgBr / Silver Bromide
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.