Class 7

Acids, Bases and Salts question bank (Science)

Practice 42 free Class 7 Science - Acids, Bases and Salts questions with answers and step-by-step solutions.

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Q1.

When a base is added to turmeric paste/stain, what colour change is observed?


(A)
Remains bright yellow
(B)
Turns deep blue
(C)
Turns reddish-brown
(D)
Turns colourless
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Q2.

What is the fundamental scientific concept underlying 'Natural Indicators (Litmus, Turmeric, China Rose)' in 'Acids, Bases and Salts'?


(A)
Empirical natural phenomena, structures, and processes defined in Natural Indicators (Litmus, Turmeric, China Rose)
(B)
Fictional stories
(C)
Ancient superstitions
(D)
None of these
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