Question

The chief inorganic substance present in the urine is

• A. Sodium chloride
• B. Potassium
• C. Calcium
• D. Magnesium

Answer 1

The correct option is A

Sodium chloride

The correct option is (A):

Explanation of the correct option:

1. Urine is a pale yellow liquid by-product released from the kidneys and stored temporarily in a sac-like structure called the urinary bladder.
2. It consists of 95% of water and 2.5% of urea and the rest is inorganic waste.
3. Sodium chloride is the chief inorganic waste released through urine.
4. It constitutes half of the total concentration of inorganic substances.

Explanation of the incorrect options:

Option (B):

1. The amount of potassium is minimal in urine and much less in comparison to chloride.

Option (C):

1. Calcium is a major constituent present in the bones.
2. A little amount is circulated through the blood and passed through the urine.
3. Its concentration is much less in comparison to chloride.

Option (D):

1. Magnesium ion is also minimal in urine.

Final answer:

The chief inorganic substance present in the urine is sodium chloride.