Identify the incorrect statements from the following.
a) Acids are bitter whereas bases are sour in taste.
b) Baking soda, tomatoes and grapes contain organic acids.
c) Acids and bases can be identified using turmeric, methyl orange and litmus solution.
d) Olfactory indicators change colours in acidic or basic solutions.

a and d

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a, b and d

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b and c

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c only

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Solution

The correct option is B a, b and d
a) Acids are sour whereas bases are bitter in taste
b) Tomatoes and grapes contain organic acids whereas baking soda contains a base.
c) Acids and bases can be identified using substances called as indicators. Turmeric, methyl orange, phenolphthalein and litmus are some examples of indicators.
d) Olfactory indicators are used to identify acidic or basic solutions on the basis of odour changes. Visual indicators show colour changes in acidic and basic solutions.

Hence, statements a, b and d are incorrect.

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Similar questions

Q. Consider the following statements:
1) Acids are sour in taste and change the colour of blue litmus to red.
2) Bases are bitter and change the colour of red litmus to blue.
3) Litmus is a natural indicator.
Which of the statements above are correct?

Q. Consider the following statements.
a. Baking soda is an acidic salt whereas washing soda is a basic salt.
b. The aqueous solution of common salt does not change the colour of either red litmus solution or blue litmus solution.
c. Amla tastes sour whereas soap solution is bitter in taste.
d. The water extract of spinach does not change the colour of blue litmus solution.
Which of the statements are correct?

Question 19

Fill the blanks in the following sentences
(a) Lemon juice and vinegar taste ___ because they contain ___
(b) Turmeric and litmus are ___acid-base indicators.
(c) Phenolphthalein gives___colour with lime water
(d) When an acidic solution is mixed with a basic solution, they___ each other forming a and water.

The indicators which turn red in acid solution are :

(a) turmeric and litmus

(b) phenolphthalein and methyl orange

(d) phenolphthalein and litmus

Q. Mention the colour changes observed when the following indicators are added to acids:
(a) Alkaline phenolphthalein solution.
(b) Methyl orange solution.
(c) Neutral litmus solution.

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