Question

Which of the following statements is true for acids?
(a) Bitter and change red litmus to blue
(b) Sour and change red litmus to blue
(c) So
ur and change blue litmus to red
(d) Bitter and change blue litmus to red
NCERT Class X
Science - Exemplar Problems
Chapter_Acids, Bases and Salts

Answer 1

Explanation:

Correct Question:-

Which of the following statements is true for acids?

(a) Bitter and change red litmus to blue

(b) Sour and change red litmus to blue

(c) Sour and change blue litmus red

(d) Bitter and change blue litmus to red

• Acids are sour and change Blue litmus to Red.
• Hence (b) part is the correct answer.

Nature of Acids:-

• They are sour in taste
• They are highly corrosive in nature.
• They conduct electricity.
• They turn red litmus Blue.
• They do not change colour of phenolphthalein$.$

Nature of Bases:-

• They are bitter in taste .
• They are soapy to touch ie slippery.
• They turn blue litmus to red.
• They conduct electricity.
• They do turn colorless phenolphthalein to pink .

Answer 2

${\boxed{\underline{\tt{ \orange{ Nature \: \: of \: \: Acids:-}}}}}$

▸They are sour in taste

▸They are highly corrosive in nature.

▸They conduct electricity.

▸They turn red litmus Blue.

▸They do not change colour of phenolphthalein

${\boxed{\underline{\tt{ \orange{Nature \: \: of \: \: Bases }}}}}$

▸They are bitter in taste .

▸They are soapy to touch ie slippery.

▸They turn blue litmus to red.

▸They conduct electricity.

▸They do turn colorless phenolphthalein to pink .