Chemistry MCQ GK

Total Questions: 100

51) What is the chemical formula for calcium carbonate?

a) CaCO3

b) CaO

c) CaCl2

d) CaSO4

52) What is the primary function of carbohydrates in living organisms?

a) Energy source

b) Store genetic information

c) Catalyze reactions

d) Provide structure

53) What is the term for the amount of heat energy required to raise the temperature of a substance?

a) Specific heat

b) Enthalpy

c) Entropy

d) Calorimetry

54) What is the process of a liquid turning into a solid called?

a) Freezing

b) Condensation

c) Sublimation

d) Evaporation

55) What is the chemical formula for hydrogen peroxide?

a) H2O2

b) H2O

c) O2

d) H2

56) Which of the following is a product of cellular respiration?

a) Oxygen

b) Glucose

c) Carbon dioxide

d) Nutrient

57) What is the chemical symbol for iron?

a) Fe

b) Ir

c) I

d) Al

58) Which type of bond involves the transfer of electrons?

a) Ionic bond

b) Covalent bond

c) Metallic bond

d) Hydrogen bond

59) What is the primary cause of acid rain?

a) Carbon dioxide

b) Sulfur dioxide

c) Nitrogen oxides

d) All of the above

60) What is the chemical formula for ammonia?

a) NH3

b) N2H4

c) NH4

d) NO2

61) Which of the following is an example of a saturated hydrocarbon?

a) C3H6

b) C4H10

c) C2H4

d) C6H10

62) What is the chemical formula for phosphoric acid?

a) H3PO4

b) H2SO4

c) HCl

d) HNO3

63) What is the term for the measure of disorder in a system?

a) Enthalpy

b) Entropy

c) Temperature

d) Pressure

64) Which element is essential for the formation of proteins?

a) Carbon

b) Oxygen

c) Nitrogen

d) Hydrogen

65) What is the process of combining two or more elements to form a compound called?

a) Synthesis

b) Decomposition

c) Combustion

d) Replacement

66) What is the chemical formula for ethanol?

a) C2H5OH

b) C2H4O2

c) C3H8

d) C2H6

67) Which of the following is a strong base?

a) NaOH

b) KCl

c) HCl

d) H2CO3

68) What is the term for a substance that speeds up a chemical reaction without being consumed?

a) Catalyst

b) Reagent

c) Solvent

d) Substrate

69) What is the chemical formula for potassium nitrate?

a) KNO3

b) KN2

c) KNO2

d) K2NO3

70) Which of the following is a property of nonmetals?

a) Lustrous appearance

b) Good conductors

c) Brittle

d) High density

71) What is the chemical formula for acetic acid?

a) C2H4O2

b) C2H6O

c) C2H2O2

d) C3H6O

72) What is the primary source of energy for the Earth's atmosphere?

a) Geothermal

b) Solar

c) Nuclear

d) Fossil fuels

73) What is the chemical symbol for calcium?

a) Ca

b) Cl

c) C

d) Co

74) Which of the following is a characteristic of bases?

a) Taste sour

b) Taste bitter

c) React with metals

d) None of the above

75) What is the chemical formula for ammonia nitrate?

a) NH4NO3

b) NH3NO3

c) NH3N2O4

d) NH2NO3

76) What is the main component of the Earth's crust?

a) Iron

b) Oxygen

c) Silicon

d) Aluminum

77) What is the process of breaking down a compound into its elements called?

a) Synthesis

b) Decomposition

c) Combustion

d) Displacement

78) Which of the following is a nonpolar molecule?

a) H2O

b) CO2

c) NH3

d) NaCl

79) What is the common name for H2SO4?

a) Sulfuric acid

b) Hydrochloric acid

c) Nitric acid

d) Phosphoric acid

80) What is the process by which a solid turns into a gas?

a) Evaporation

b) Condensation

c) Sublimation

d) Freezing

81) What is the primary gas in the atmosphere?

a) Oxygen

b) Nitrogen

c) Carbon dioxide

d) Argon

82) What is the chemical formula for lithium chloride?

a) LiCl

b) Li2Cl

c) LiCl2

d) Li3Cl

83) What is the term for the energy required to start a chemical reaction?

a) Activation energy

b) Bond energy

c) Potential energy

d) Kinetic energy

84) Which of the following is a characteristic of an ionic bond?

a) Sharing of electrons

b) Transfer of electrons

c) Weak bond

d) Conducts electricity in solid form

85) What is the chemical formula for silver nitrate?

a) AgNO3

b) AgCl

c) Ag2O

d) AgSO4

86) What is the primary role of enzymes in biological systems?

a) Catalyze reactions

b) Transport substances

c) Provide structure

d) Store energy

87) What is the common name for NaHCO3?

a) Baking soda

b) Baking powder

c) Salt

d) Sugar

88) What is the term for the process of a liquid changing into a gas?

a) Evaporation

b) Condensation

c) Sublimation

d) Freezing

89) What is the primary component of the human body?

a) Water

b) Carbohydrates

c) Proteins

d) Fats

90) Which of the following is an example of a carbohydrate?

a) Glucose

b) Protein

c) Lipid

d) Nucleic acid

91) What is the chemical formula for potassium hydroxide?

a) KOH

b) K2O

c) K2O2

d) K2SO4

92) What is the term for a solution that has a low concentration of solute?

a) Dilute

b) Concentrated

c) Saturated

d) Supersaturated

93) Which of the following is a property of acids?

a) Taste sweet

b) Feel slippery

c) Conduct electricity

d) All of the above

94) What is the chemical formula for magnesium sulfate?

a) MgSO4

b) MgO2

c) MgCl2

d) MgCO3

95) What is the term for the measure of the average kinetic energy of particles in a substance?

a) Temperature

b) Pressure

c) Volume

d) Density

96) Which of the following is a property of a metal?

a) Dull appearance

b) Poor conductor

c) Malleable

d) Brittle

97) What is the primary gas produced during respiration?

a) Oxygen

b) Carbon dioxide

c) Nitrogen

d) Hydrogen

98) What is the chemical formula for sodium bicarbonate?

a) NaHCO3

b) Na2CO3

c) Na2HCO3

d) NaH2CO3

99) What is the term for the amount of solute dissolved in a given volume of solution?

a) Concentration

b) Molarity

c) Solubility

d) Dilution

100) Which of the following is an example of a lipid?

a) Glucose

b) Triglyceride

c) Protein

d) Nucleic acid

Total Questions: 100

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