Match the following:

Substance	pH
i. Lemon juice	a. 14
ii. Gastric juice	b. 1.2
iii. Milk of magnesia	c. 2.2
iv. Sodium hydroxide	d. 10
solution

Correct option is B

The Correct Answer is (B) i-c, ii-b, iii-d, iv-a

Matching the substances with their pH:

• Lemon juice:
• Lemon juice is acidic due to the presence of citric acid.
• Its pH is approximately 2.2.
  Match: i-c
• Gastric juice:
• Gastric juice contains hydrochloric acid (HCl) and is highly acidic.
• Its pH is approximately 1.2.
  Match: ii-b
• Milk of magnesia:
• Milk of magnesia is a base used as an antacid, containing magnesium hydroxide.
• Its pH is around 10.
  Match: iii-d
• Sodium hydroxide:
• Sodium hydroxide (NaOH) is a strong alkali.
• Its pH is approximately 14.
  Match: iv-a