RRB NTPC General Science PYQ Set (Memory-Based)

8 memory-based questions with answers and explanations for RRB NTPC General Science.

Memory-based compilation of frequently asked questions. Verify with the official answer key.

Q1. Which blood group is called the universal donor?

  1. O Positive (O+)
  2. A Positive (A+)
  3. O Negative (O-)
  4. AB Positive (AB+)

Answer: C — O negative red cells carry no A, B or Rh antigens, so they suit almost anyone.

Q2. Deficiency of Vitamin C causes:

  1. Night blindness
  2. Beriberi
  3. Rickets
  4. Scurvy

Answer: D — Scurvy causes bleeding gums; Vitamin C is ascorbic acid.

Q3. The SI unit of electric current is:

  1. Watt
  2. Ampere
  3. Ohm
  4. Volt

Answer: B — Ampere is one of the seven SI base units.

Q4. Which gas is released during photosynthesis?

  1. Oxygen
  2. Nitrogen
  3. Hydrogen
  4. Carbon dioxide

Answer: A — Oxygen comes from splitting water molecules in the light reaction.

Q5. How many chambers does the human heart have?

  1. 2
  2. 3
  3. 4
  4. 5

Answer: C — Two atria and two ventricles.

Q6. The chemical formula of baking soda is:

  1. NaHCO3
  2. Na2CO3
  3. CaCO3
  4. NaCl

Answer: A — Baking soda is sodium hydrogen carbonate; Na2CO3 is washing soda.

Q7. Which part of the cell is called the 'powerhouse of the cell'?

  1. Mitochondria
  2. Golgi body
  3. Ribosome
  4. Nucleus

Answer: A — Mitochondria produce ATP through cellular respiration.

Q8. Which enzyme in saliva starts the digestion of starch?

  1. Salivary amylase (Ptyalin)
  2. Trypsin
  3. Lipase
  4. Pepsin

Answer: A — Ptyalin converts starch into maltose in the mouth.