Science Practice Quiz 164

Q1.Which of the following substances is NOT listed among those to be tested with litmus paper in Activity 4.1?

A. Vinegar B. Milk of magnesia C. Hydrochloric acid D. Detergent solution

Q2.What is the initial step in preparing limewater?

A. Adding lemon juice to water. B. Adding lime (chuna) to water. C. Stirring water vigorously. D. Pouring water from the top of a tumbler.

Q3.According to the provided text, what color does a turmeric stain turn when washed with soap, and what is the reason for this change?

A. It turns blue because soap solution is acidic. B. It turns red because soap solution is basic. C. It disappears completely because soap solution is neutral. D. It turns green because soap solution is alkaline.

Q4.Which flower is mentioned in Activity 4.3 as being used to prepare an indicator?

A. Rose B. Lotus C. China rose (Gudhal) D. Marigold

Q5.Based on the information given in the text, what is the chemical nature of soap solution?

A. Acidic B. Basic C. Neutral D. Amphoteric

Q6.Which of the following substances is NOT listed in Table 4.3 for testing its effect on turmeric solution?

A. Lemon juice B. Milk of magnesia C. Common salt D. Hydrochloric acid

Q7.According to the provided text, what color does China rose indicator turn acidic solutions?

A. Green B. Dark pink (magenta) C. Brown D. Yellow

Q8.Why is it suggested to make a solution of baking soda before testing it with litmus paper, according to the riddle in the text?

A. Solid baking soda is too corrosive for litmus paper. B. The indicator requires a liquid medium to show a result. C. Dry litmus paper is not effective for any chemical test. D. Baking soda only reacts with warm water.

Q9.From the list of test solutions in Table 4.4, which one is explicitly mentioned?

A. Hydrochloric acid B. Common salt solution C. Sodium hydroxide D. Nitric acid

Q10.Table 4.5 is designed to record the effect of acids on which combination of indicators?

A. Litmus paper and China rose solution only B. Turmeric paper and China rose solution only C. Litmus paper, turmeric paper, and China rose solution D. Litmus paper only

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Science Practice Quiz 164