Chemical Law MCQs
Chemical Law MCQs
Answer these Chemical Law MCQs and see how sharp is your knowledge of Chemical Law. Scroll down and let's start!
1: Using the table of average bond energies below, the ?h for the reaction is ________ kj.
A. + 160 kJ
B. -63 kJ
C. - 160 kJ
D. -217 kJ
2: When aqueous solutions of __________ are mixed, a precipitate forms.
A. K2SO4 and CrCl3
B. KOH and Ba(NO3)2
C. NaI and KBr
D. Li2CO3 and CsI
E. NiBr2 and AgNO3
3: Which law states that the total mass of reactants is equal to the total mass of products in a chemical reaction?
A. Boyle's Law
B. Gay-Lussac's Law
C. Law of Conservation of Mass
D. Avogadro's Law
4: Which law states that the pressure of a gas is inversely proportional to its volume at constant temperature?
A. Boyle's Law
B. Charles's Law
C. Dalton's Law
D. Graham's Law
5: According to Avogadro's Law, equal volumes of gases at the same temperature and pressure contain equal numbers of:
A. Particles
B. Molecules
C. Atoms
D. Electrons
6: Which law states that the total pressure exerted by a mixture of gases is equal to the sum of the pressures exerted by each individual gas in the mixture?
A. Boyle's Law
B. Charles's Law
C. Dalton's Law
D. Graham's Law
7: What does Charles's Law state?
A. The volume of a gas is directly proportional to its temperature at constant pressure
B. The pressure of a gas is directly proportional to its temperature at constant volume
C. The volume of a gas is inversely proportional to its pressure at constant temperature
D. The volume of a gas is directly proportional to its temperature at constant pressure
8: Which law states that the rate of diffusion or effusion of a gas is inversely proportional to the square root of its molar mass?
A. Boyle's Law
B. Charles's Law
C. Dalton's Law
D. Graham's Law
9: According to the law of multiple proportions, when elements combine to form compounds, the ratio of masses of one element to the other can be expressed in:
A. Whole numbers
B. Prime numbers
C. Simple ratios
D. Irrational numbers
10: Which law states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures exerted by each individual gas?
A. Boyle's Law
B. Charles's Law
C. Dalton's Law
D. Graham's Law
11: According to the law of definite proportions, the ratio of elements in a compound is always:
A. Variable
B. Random
C. Fixed or constant
D. Non-existent
12: Which law states that the energy change in a chemical reaction is equal to the difference in the energy of the products and the energy of the reactants?
A. Boyle's Law
B. Charles's Law
C. Hess's Law
D. Graham's Law
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Chemical Law MCQs
