Olympiad Class-7 Science Set-3
1 / 25
Which acid is found in vinegar according to the chapter?
2 / 25
Which of the following describes the mixture of materials that exhibits a range of colours in acidic, basic, and neutral solutions?
3 / 25
From where is litmus extracted?
4 / 25
Which one of the following fruits contains ascorbic acid?
5 / 25
What name is given to the solutions that dont affect the colour of either the red or the blue litmus test strips?
6 / 25
Which of the following solutions will cause the blue litmus to turn red?
7 / 25
Which of the following is the Latin word that acid is derived from?
8 / 25
Which of the following acids is formed when carbon dioxide is dissolved in raindrops?
9 / 25
How will the addition of turmeric affect the colour of lime water?
10 / 25
Which of the following is not a characteristic of a neutralisation reaction?
11 / 25
Which of the following is a base?
12 / 25
What happens to the molecules in a substance when it cools down?
13 / 25
What effect does turmeric have when mixed with a basic solution?
14 / 25
Which of the following is a natural indicator?
15 / 25
Which of the following indicators are typically found as strips?
16 / 25
What colour change will you observe when phenolphthalein is added to an acid?
17 / 25
What color does blue litmus paper turn when dipped in acid?
18 / 25
Which base is found in window cleaner?
19 / 25
Which of the following is not an indicator that occurs naturally?
20 / 25
What changes in colour are produced when a basic solution is combined with the China rose indicator?
21 / 25
Which of the following is the outcome of a neutralisation reaction?
22 / 25
Which of the following chemicals is present in the calamine solution?
23 / 25
What is the taste of curd as described in the chapter?
24 / 25
What is the nature of baking soda as described in the chapter?
25 / 25
Which of the following substances can be used to soothe the discomfort brought on by wasp stings?
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