EASY
UPSC CAPF AC Paper - I
IMPORTANT
Earn 100
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is:
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Important Questions on Chemistry
EASY
UPSC CAPF AC Paper - I
IMPORTANT
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
EASY
UPSC CAPF AC Paper - I
IMPORTANT
Which of the following solutions will not change the colour of blue litmus paper to red?
I. Acid solution
II. Base solution
III. Common salt solution
Select the correct answer using the codes given below.
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Match the following Columns.
| Column I (organic acids) | Column II (natural sources) |
| A. Acetic acid | 1. Curd |
| B. Lactic acid | 2. Tamarind |
| C. Tartaric acid | 3. Vinegar |
| D. Oxalic acid | 4. Tomato |
Codes:
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Statement I: Mixing concentrated acids or bases with water is a highly exothermic process.
Statement II: Water of crystallisation is the fixed number of water molecules chemically attached to each formula unit of a salt in its crystalline form.
HARD
UPSC CAPF AC Paper - I
IMPORTANT
Match the following Columns.
| Column I | Column II |
| A. Sodium hydroxide | 1. For disinfecting water |
| B. Bleaching powder | 2. For removing permanent hardness of water |
| C. Sodium hydrogen carbonate | 3. In setting fractured bones |
| D. Washing soda | 4. Soaps and detergents, paper making |
| E. Plaster of Paris | 5. Soda-acid fire extinguisher |
Codes:
EASY
UPSC CAPF AC Paper - I
IMPORTANT
EASY
UPSC CAPF AC Paper - I
IMPORTANT
