Acids, Bases and Salts [CBSE (Central Board of Secondary Education) Class-7 Science]: Questions 7 - 12 of 17
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Question 7
Question MCQ▾
Phenolphthalein is colourless in water but changes to pink colour when added to a:
Choices
Choice (4) | Response | |
---|---|---|
a. | Acid | |
b. | Base | |
c. | Salt | |
d. | All of the above |
Question 8
Question MCQ▾
Quick lime or slaked lime added to the soil to make it:
Choices
Choice (4) | Response | |
---|---|---|
a. | Neutral | |
b. | Acidic | |
c. | Basic | |
d. | Question does not provide sufficient data or is vague |
Question 9
Question MCQ▾
Commonly used acids in laboratory are called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Indicators | |
b. | Milk of magnesia | |
c. | Mineral acid | |
d. | Question does not provide sufficient data or is vague |
Question 10
Question MCQ▾
Application of neutralisation in daily lives which helps in digestion of food are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Acids in stomach | |
b. | Brushing teeth | |
c. | Question does not provide sufficient data or is vague | |
d. | All of the above |
Question 11
Question MCQ▾
Indicator is made using a hibiscus flower is:
Choices
Choice (4) | Response | |
---|---|---|
a. | Flower indicator | |
b. | China rose indicator | |
c. | Hibiscus indicator | |
d. | Question does not provide sufficient data or is vague |
Question 12
Question MCQ▾
Acids are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Turns blue litmus red | |
b. | Sour to taste | |
c. | Both a. and b. are correct | |
d. | Question does not provide sufficient data or is vague |