This Chemistry quiz by Jocelyn Ventura tests knowledge on gas properties, compound composition, and chemical principles such as the law of definite composition. It assesses understanding of fundamental chemistry concepts, enhancing learners' grasp of elemental and compound differentiation.
A. It is a compound
B. It is a pure substance
C. It always contains oxygen
D. It is a chemical combination of a metal and a non-metal
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A. kind of element present
B. kind and amount of element present
C. kind and volume of elements present
D. amount and volume of the elements present
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A. An element is homogeneous while a compound is a heterogeneous.
B. An element has a sharp melting point while a compound melts over a temperature range.
C. An element gains mass when heated in the presence of air while a compound loses mass when heated in the presence of air.
D. An element is a one phase system while a compound is a two phase system.
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A. a sample of ice
B. a pure sample of copper
C. a solution of salt in water
D. a mixture of oxygen gas and nitrogen gas
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A. It is a liquid and burns
B. it is clear and colorless
C. it is soluble in alcohol and burns
D. It boils sharply and has a definite composition
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A. its density
B. its freezing point
C. its boiling point
D. its non flammability
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A. 6 g Sulfur
B. 2 g Sulfur
C. 2 g Calcium
D. 6 g Calcium
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A. AB has no definite composition.
B. AB is made up of two parts of A and one part B by mass.
C. The sum of the masses of A and B equals the mass of AB.
D. The elements A and B combined in definite proportion by mass in forming AB.
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A. Use aluminium pots
B. Use only fresh, clean leaves
C. store in brown-colored bottles
D. apply low heat for a longer period
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A. mass of the product
B. mass of the reactants
C. temperature of the vessel.
D. total mass of reactants and products
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A. The same as the mass of copper.
B. Twice the mass of oxygen that combined with copper
C. The sum of the masses of copper and oxygen that combined.
D. The sum of twice the mass of copper and the mass of oxygen that combined.
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A. Multiply the mass of C by 2
B. Add the masses of A, B, and C.
C. Add the masses of A and B, and subtract the mass of C
D. Add the masses of A and B, and subtract from the mass of C.
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A. It is greater than the mass before heating.
B. it is less than the mass before heating
C. It can not be predicted
D. They are the same.
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A. Dalton’s Law
B. law of mass Conservation
C. Law of Multiple Proportion
D. law of Definite Composition
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A. 10 g
B. 15 g
C. 25 g
D. 35 g
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A. Number of molecules of reactants
B. Chemical composition
C. Volume
D. mass
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A. 0.30 g
B. 0.50 g
C. 0.70 g
D. 0.90 g
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A. The elements that combine have definite composition and fixed proportion of elements by mass.
B. The number of atoms in the left should be equal to the atoms on the right of the arrow.
C. The elements have definite mass ratios.
D. The molecules are indestructible.
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A. The substance combined with another element to form a compound.
B. The substance decomposed and became ash after burning.
C. The substance is a compound.
D. The substance is impure.
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A. the white crystal
B. the dark violet crystal
C. the red powder
D. white crystal and red powder
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A. molecules
B. electrons
C. atoms
D. ions
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A. An atom is the smallest particle of an element.
B. Atoms combine in ratios of small whole numbers.
C. Atoms of a given element have the same properties of size, shape and mass.
D. In an ordinary chemical reactions, no new atoms are created and no old ones are destroyed.
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A. 2 g Sulfur
B. 2 g Calcium
C.6 g Sulfur
D. 6 g Calcium
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A. Sulfur
B. Calcium
C. Sulfur and Calcium
D. Calcium and Sulfide
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