General Science MCQ Practice

A Swiss scientist.

transmitted by mosquitoes 'Aedes aegypti'.

launched by the Soviet Union on 19 April 1975 and built by the Indian Space Research Organisation (ISRO)

Norman E. Borlaug was awarded the Nobel Peace Prize in 1970 in recognition of his contributions to global food production.

Correct answer: Groundnut

• Explanation: Groundnut is a legume whose fruit develops underground after pollination. The stalk (peg) grows downward to bury the pod, where it matures, making its fruit an underground pod.
• Key concept: Geocarpy (underground fruiting) in groundnuts.
• Why others are incorrect:
  • Potato: a tuber (underground stem), not a fruit.
  • Carrot: a taproot vegetable, not a fruit.
  • Onion: bulb, not a fruit.
• Exam tip: Remember “groundnut” grows its fruit underground despite being a peanut genus.

Question: Iron deficiency in Blood is referred as

• Correct answer: B. Anaemia

Why: Iron is needed to form hemoglobin in red blood cells. Low iron reduces hemoglobin, lowering oxygen transport → anaemia. Key concept: reduced Hb concentration or Hb iron content.
Formula: Hb levels below normal range indicate anaemia (varies by age/sex).
Exam tip: Remember common causes: iron deficiency in kids and menstruating women; look for fatigue, pale skin.
Why other options are incorrect: Goitre—thyroid swelling; Osteoporosis—bone density loss; Kwashiorko—severe protein deficiency.

Correct answer: B

• Explanation: Condensation is a phase change from gas/vapour to liquid when gases cool or pressure increases. This is the key scientific concept of condensation.
• Why others are incorrect: A: solid to liquid is melting. C: liquid to gas is evaporation/boiling. D: not true.
• Exam tip: Remember “gas → liquid” is condensation (cooling/pressurizing the gas).

The heart is covered by a membrane called the Pericardium.

• Correct answer: B. Pericardium
• Key concept: The pericardium is a double-layered sac that protects and lubricates the heart.
• Why correct: It directly envelops the heart (not the myocardium, which is the heart muscle itself).
• Why others are incorrect: A. Myocardium = heart muscle. C. Aorta = major artery, not a membrane. D. None of These = not true.
• Exam tip: Remember “pericardium surrounds the heart” to quickly recall it in questions.

Correct answer: D

• Explanation: A sphygmomanometer measures blood pressure using a cuff and gauge to read systolic/diastolic pressures (in mmHg). Concept: arterial pressure in the circulatory system.
• Why the others are incorrect:
  • A) Heart beat is assessed by auscultation/palpation, not this device.
  • B) Vision is checked with a refractometer/eye exam tools.
  • C) Blood sugar is measured with a glucometer.
• Exam tip: Remember “cuff + gauge = blood pressure.”