EASY
7th CBSE
IMPORTANT
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Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed?

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Important Questions on Acids, Bases and Salts

EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 4
Phenolphthalein is a synthetic indicator, and its colours in acidic and basic solutions respectively are
EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 5
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 6
‘Litmus’, a natural dye is an extract of which of the following?
EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 7
Neutralisation reaction is a
EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 8
A solution changes the colour of turmeric indicator from yellow to red. The solution is
EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 9
Which of the following set of substances contain acids?
EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 10
On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution?
EASY
7th CBSE
IMPORTANT
NCERT Exemplar Science - Class 7>Chapter 5 - Acids, Bases and Salts>MULTIPLE CHOICE QUESTIONS>Q 11
Which of the following is an acid-base indicator?