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Acids and bases

18 PYQ across 5 exams · 1984–2026 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

CSE 1984 → CDS 2014 → … → CISF 2024
19841 PYQ
CSEQ30
Solution of washing soda in water is.…
20142 PYQs
CDSQ28
Which of the following is not correct about Baking Soda?…
CDSQ105
Which of the following solutions will not change the colour of blue litmus paper to red? 1. Acid solution 2. Base solution 3. Common salt so…
20171 PYQ
CDSQ17
In the reaction between hydrogen sulphate ion and water HSO4- + H2O -> H3O+ + SO4 2- the water acts as…
20181 PYQ
CDSQ3
Which one of the following gases dissolves in water to give acidic solution?…
20202 PYQs
CDSQ4
A solution having pH equal to zero is known as…
EPFOQ51
Which one of the following substances, when added to water, will not change the pH ?…
20213 PYQs
CDSQ7
Which of the following statements about universal indicator is/are true? 1. It is a mixture of several indicators. 2. It shows different col…
CDSQ25
Which of the following statements is/are correct? 1. All the bases are alkali. 2. All alkalis dissolve in water. 3. Alkalis are soapy to tou…
CDSQ114
Which one of the following is used in soda-acid fire extinguishers?…
20222 PYQs
CDSQ12
Milk of Magnesia is used when people suffer from indigestion of food. It is a…
CDSQ13
Which one of the following statements is true when non-metals are dissolved in water ?…
20232 PYQs
EPFOQ53
Which one of the following statements is not correct?…
NDAQ90
What is the action of ethanol on litmus ?…
20241 PYQ
CISFQ14
A solution has a pH value around 13·0. The solution may be called…
20252 PYQs
CDSQ59
Which one of the following contains all Lewis acids ?…
CDSQ50
A solution with a pH value less than 7 is a/an :…
20261 PYQ
CDSQ29
Consider the following statements regarding bases and alkalis : 1. All bases dissolve in water. 2. Bases which are soluble in water are call…
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IndicatorsOxides
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