Acid Bases and Salts

The correct way of making a solution of acid in wateris to(NCERT Exemplar)
1. add water to acid
2. add acid to water
3. mix acid and water simultaneously
4. add water to acid in a shallow container
Products of a neutralisation reaction are always:
1. an acid and a base
2. an acid and a salt
3. a salt and water
4. a salt and a base
Turmeric is a natural indicator.On adding its paste to acid and base separately, which colours would be observed.
1. yellow in both acid and base
2. yellow in acid and red in base
3. pink in acid and yellow in base
4. red in acid and blue in base
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions respectively are:(NCERT Exemplar)
1. red and blue
2. blue and red
3. pink and colourless
4. colourless and pink
Which of the following set of substances contain acids?(NCERT Exemplar)
1. grapes, lime water
2. vinegar, soap
3. curd, milk of magnesia
4. curd, vinegar
Which of the following is an acid-base indicator?
1. vinegar
2. lime water
3. turmeric
4. baking soda
Which of the following are the characteristics of acid:
1. they are sour in taste.
2. they turn blue litmus red
3. they contain hydrogen ion
4. all of these
Tooth decay is caused by presence of:
1. acid
2. base
3. both acid and base
4. none of these
Sugar solution turns turmeric indicator into which colour?
1. pink
2. blue
3. red
4. no change
which of the following is an acid used in labs?
1. hydrochloric acid
2. sodium hydroxide
3. calcium hydroxide
4. zinc hydroxide