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Science · 2023 · 3 marks
CBSE 2023 · Region 4 · Set 3 · Q27
Consider the following salts: (i) YCl (ii) NH_4 X (iii) ZCO_3 (a) What would be the pH of the salt solution if in YCl, Y is sodium? Give reason for…
Consider the following salts:
(i)
YCl
(ii)
$\displaystyle \mathrm{NH}_{4} \mathrm{X}$
(iii)
$\displaystyle \mathrm{ZCO}_{3}$
(a)
What would be the pH of the salt solution if in YCl, Y is sodium? Give reason for your answer.
(b)
If in salt $\displaystyle \mathrm{NH}_{4} \mathrm{X}, \mathrm{X}$ is nitrate, then its solution will give what colour with universal indicator? Why?
(c)
What would be the change in colour in blue litmus solution if $\displaystyle \mathrm{ZCO}_{3}$ is added to it and Z is potassium?
Marking-scheme solution
(a) •$\displaystyle 7$
salt of strong acid and strong base
(b) • Pink / orange
salt of weak base and strong acid
(c) • No change / remain blue
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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.