Top 100 Important Everyday Science Mcqs Set-12

61- The chemical formula of carbon monoxide is:

A. CO
B. CO₂
C. C₂O
D. C₃O₂

Answer : A. CO

62- The part of the human heart that receives deoxygenated blood is:

A. Right ventricle
B. Left ventricle 
C. Right atrium
D. Left atrium 

Answer : C. Right atrium

63- The layer of the Earth that is liquid is:

A. Crust
B. Mantle
C. Outer core
D. Inner core

Answer : C. Outer core

64- The SI unit of inductance is:

A. Henry
B. Weber
C. Tesla
D. Farad

Answer : A. Henry

65- The process by which plants absorb water from the soil is:

A. Osmosis
B. Diffusion
C. Active transport 
D. Transpiration

Answer : A. Osmosis

66- The most common compound in the human body is:

A. Protein
B. Water
C. Fat
D. Carbohydrate

Answer : B. Water

67- The chemical formula of copper sulphate is:

A. CuSO₄
B. Cu₂SO₄ 
C. Cu(SO₄)₂ 
D. Cu₂(SO₄)₃

Answer : A. CuSO₄

68- The largest artery in the human body is:

A. Aorta
B. Femoral
C. Carotid
D. Pulmonary artery

Answer : A. Aorta

69- The planet with the largest volcano in the solar system is:

A. Jupiter
B. Venus
C. Mars
D. Earth

Answer : C. Mars

70- The process by which glucose is broken down in the absence of oxygen is:

A. Fermentation
B. Photosynthesis
C. Aerobic respiration
D. Anaerobic respiration

Answer : D. Anaerobic respiration

71- The chemical used as an antiseptic in hospitals is:

A. Phenol
B. Acetone
C. Methanol
D. Ethanol

Answer : A. Phenol

72- The part of the brain that controls body temperature is:

A. Medulla
B. Cerebellum
C. Cerebrum
D. Hypothalamus

Answer : D. Hypothalamus

73- The SI unit of electric potential is:

A. Volt
B. Watt
C. Ohm
D. Ampere

Answer : A. Volt

74- The study of fungi is called:

A. Virology
B. Mycology
C. Bacteriology
D. Parasitology

Answer : B. Mycology

75- The process of breaking down food into simpler substances is:

A. Excretion
B. Assimilation
C. Digestion
D. Absorption

Answer : C. Digestion

76- The chemical formula of methane is:

A. CH₄
B. C₂H₆
C. C₃H₈ 
D. C₄H₁₀

Answer : A. CH₄

77- The planet with the most massive ring system is:

A. Jupiter
B. Saturn
C. Uranus
D. Neptune

Answer : B. Saturn

78- The hormone responsible for the development of secondary male characteristics is:

A. Insulin
B. Estrogen
C. Progesterone
D. Testosterone

Answer : D. Testosterone

79- The chemical used in refrigerators as a coolant is:

A. Water
B. Ammonia
C. Oxygen
D. Nitrogen

Answer : B. Ammonia

80- The process by which sediment is laid down in a new location is:

A. Erosion
B. Transport
C. Weathering
D. Deposition

Answer : D. Deposition

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