Top 100 Important Everyday Science Mcqs Set-14

81- The instrument used to measure the humidity of the air is:

A. Hygrometer
B. Barometer
C. Thermometer
D. Anemometer

Answer : A. Hygrometer

82- The most abundant element in the Earth's crust is:

A. Iron
B. Silicon
C. Oxygen
D. Aluminium

Answer : C. Oxygen

83- The process of converting glucose into starch is:

A. Oxidation
B. Hydrolysis
C. Polymerization
D. Dehydration

Answer : C. Polymerization

84- The chemical formula of ammonium nitrate is:

A. NH₄NO₃
B. NH₃NO₃ 
C. NH₄NO₂ 
D. NH₃NO₂

Answer : A. NH₄NO₃

85- The largest butterfly in the world is:

A. Morpho
B. Swallowtail
C. Monarch
D. Queen Alexandra’s birdwing

Answer : D. Queen Alexandra's birdwing

86- The hormone that regulates the heart rate is:

A. Insulin
B. Adrenaline
C. Thyroxine
D. Cortisone

Answer : B. Adrenaline

87- The process of converting fats into glucose is:

A. Lipolysis
B. Glycolysis
C. Lipogenesis
D. Gluconeogenesis

Answer : D. Gluconeogenesis

88- The chemical formula of potassium permanganate is:

A. KMnO₄ 
B. K₂MnO₄ 
C. KMnO₃ 
D. K₂MnO₃

Answer : A. KMnO₄

89- The part of the human body that produces insulin is:

A. Liver
B. Spleen
C. Pancreas
D. Gall bladder

Answer : C. Pancreas

90- The instrument used to measure the speed of the wind is:

A. Barometer
B. Anemometer
C. Hygrometer
D. Thermometer

Answer : B. Anemometer

91- The most abundant element in the Earth's oceans is:

A. Oxygen
B. Hydrogen
C. Sodium
D. Chlorine

Answer : A. Oxygen

92- The process of converting glucose into maltose is:

A. Hydrolysis
B. Dehydration
C. Oxidation
D. Reduction

Answer : A. Hydrolysis

93- The chemical formula of sodium nitrate is:

A. NaNO₃ 
B. Na₂NO₃ 
C. NaNO₂ 
D. Na₂NO₂

Answer : A. NaNO₃

94- The largest spider in the world is:

A. Tarantula
B. Huntsman
C. Wolf spider
D. Goliath birdeater

Answer : D. Goliath birdeater

95- The hormone that regulates blood glucose levels is:

A. Thyroxine
B. Adrenaline
C. Insulin
D. Glucagon

Answer : C. Insulin

96- The process of converting glycogen into glucose is:

A. Glycogenesis
B. Glycogenolysis
C. Lipogenesis
D. Gluconeogenesis

Answer : B. Glycogenolysis

97- The chemical formula of calcium carbonate is:

A. CaO
B. CaCO₃
C. Ca(OH)₂
D. CaSO₄

Answer : B. CaCO₃

98- The part of the human body that produces histamine is:

A. Eosinophils
B. Neutrophils
C. Mast cells
D. Lymphocytes

Answer : C. Mast cells

99- The instrument used to measure the refractive index is:

A. Polarimeter
B. Spectrometer
C. Photometer
D. Refractometer

Answer : D. Refractometer

100- The most abundant element in the Sun is:

A. Helium
B. Hydrogen
C. Oxygen
D. Carbon

Answer : B. Hydrogen

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