Q1. Bleaching powder is used as a disinfectant for water to: *
1 point
Q2. Which one of the following salts will dissolve in water to form an alkaline solution? *
1 point
Q3. Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: *
1 point
Q4. What happens when a solution of an acid is mixed with a solution of a base in a test tube? (i) Temperature of the solution decreases (ii) Temperature of the solution increases (iii) Temperature of the solution remains the same (iv) Salt formation takes place *
1 point
Q5. When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guardtube containing calcium chloride. The role of calcium chloride taken in the guard tube is to - *
1 point
Q6. In terms of acidic strength, which one of the following is in the correct increasing order? *
1 point
Q7. Tomato is a natural source of which acid? *
1 point
Q8. Brine is an - *
1 point
Q9. Na2CO3. 10H2O is *
1 point
Q10. At what temperature is gypsum heated to form Plaster of Paris? *
1 point
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