Umar Draz, Author at DocMCQs

The water of which river is shared by India, China and Bangladesh?

A. Ganges

B. Yamuna

C. Brahmaputra

D. Indus

Correct answer is: C. Brahmaputra

The Brahmaputra originates in China (Tibet), flows through India, then into Bangladesh before meeting the Meghna.

Chaj (Chaj/JeCh) Doab lies between which two rivers?

A. Jhelum & Ravi

B. Chenab & Sutlej

C. Chenab & Jhelum

D. Indus & Chenab

Correct answer is: C. Chenab & Jhelum

Chaj (Jech) Doab is the tract between the Jhelum and Chenab rivers. (Wikipedia)

The largest lake in the world (by area) is:

A. Lake Superior

B. Caspian Sea

C. Lake Victoria

D. Lake Huron

Correct answer is: B. Caspian Sea

Conventionally the Caspian Sea is treated as the world’s largest (inland) lake by surface area. (Wikipedia)

Which is the capital of Bulgaria?

A. Bucharest

B. Sofia

C. Belgrade

D. Zagreb

Correct answer is: B. Sofia

Sofia is the capital city of Bulgaria.

Ice floats on water because:

A. Ice is denser than water

B. Water is denser than ice

C. It is more viscous than water

D. Ice has more surface tension than water

Correct answer is: B. Water is denser than ice

Ice floats because ice is less dense than liquid water — water is denser than ice.

Taste buds are for:

A. Digestion

B. Selection/ Taste perception

C. Respiration

D. Safety

Correct answer is: B. Selection/ Taste perception

Taste buds detect flavors (sweet, salty, sour, bitter, umami) — they help in selecting food (and detecting spoilage/toxins).

Soil erosion is caused by:

A. Deforestation

B. Residual

C. Mining

D. Leaching

Correct answer is: A. Deforestation

Removal of vegetation cover (deforestation) increases runoff and accelerates soil erosion.

Which is the nearest major galaxy to Earth (outside the Milky Way)?

A. Milky Way

B. Andromeda Galaxy

C. Triangulum Galaxy

D. Sombrero Galaxy

Correct answer is: B. Andromeda Galaxy

The Andromeda Galaxy (M31) is the nearest large spiral galaxy to the Milky Way (~2.5 million ly).

Which of the following is an example of a mineral acid?

A. Acetic acid

B. Citric acid

C. Sulfuric acid

D. Tartaric acid

Correct answer is: C. Sulfuric acid

Sulfuric acid (H₂SO₄) is a strong mineral (inorganic) acid; the others are organic acids.

How many vertebrae are there in the adult human body (counting fused bones as in adult anatomy)?

A. 33

B. 24

C. 22

D. 20

Correct answer is: A. 33

There are 33 vertebrae in the adult human body, though these are grouped into 5 regions and include 5 fused sacral and 4 fused coccygeal vertebrae. The total counts include 7 cervical (neck), 12 thoracic (chest), 5 lumbar (lower back), 5 sacral (fused), and 4 coccygeal (fused).
Breakdown of Vertebrae
Cervical Vertebrae: 7
Thoracic Vertebrae: 12
Lumbar Vertebrae: 5
Sacral Vertebrae: 5 (fused)
Coccygeal Vertebrae: 4 (fused, forming the coccyx or tailbone)
Total: 7 + 12 + 5 + 5 + 4 = 33

Author name: Umar Draz