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SAI International School
Class-VII
Subject-Chemistry
Topic: Acid Bases and salts
Sub-topic-Differences between Acids & Bases
Home Assignment

Objective Questions:-

MCQs:-

Choose the correct option

1. Compounds which have pH more than 7.
a. Bases
b. Salts
c. Water
d. Acids
2. Compounds which change colour on coming in contact with acids or bases.
a. Salt
b. Indicator
c. Acids
d. Bases
3. Which of the following is not a natural indicator?
a. Litmus
b. Methyl orange
c. Red cabbage
d. Turmeric
4. Which of the following is not a property of bases?
a. They are sour.
b. They are slippery to touch.
c. They are soapy to touch.
d. They turn red litmus blue.
5. Colour observed when China Rose extract is added to soap solution:
a. Blue
b. Magenta
c. Red
d. Green
6. The gas produced when acids react the carbonate or bicarbonate of a metal:
a. Water vapour
b. Carbon dioxide
c. Oxygen
d. Hydrogen
7. The pH value of a neutral solution should be:
a. Less than 7

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