Chemistry - Mock Test 6

Question 51

One mole of a gas occupies a volume of 22.4 L. This is derived from

A) Berzelius’ hypothesis B) Gay-Lussac’s law C) Avogadro’s law D) Dalton’s law

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Question 52

In compound A, 1.00g of nitrogen unites with 0.57g of oxygen. In compound B, 2.00g of nitrogen combines with 2.24g of oxygen. In compound C, 3.00g of nitrogen combines with 5.11g of oxygen. These results obey the following law

A) law of constant proportion B) law of multiple proportion C) law of reciprocal proportion D) Dalton’s law of partial pressure

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Question 53

Which of the following statements about a compound is incorrect

A) A molecule of a compound has atoms of different elements. B) A compound cannot be separated into its constituentelements by physical methods of separation. C) A compound retains the physical properties of itsconstituent elements. D) The ratio of atoms of different elements in a compoundis fixed

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Question 54

Which of the following is an example of a heterogeneous substance

A) Bottled water B) Table salt C) Pieces of copper D) Candle

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Question 55

Which of the following is an example of a heterogeneous substance

A) Bottled water B) Table salt C) Pieces of copper D) Candle

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Question 56

A measured temperature on Fahrenheit scale is 200 °F. What will this reading be on Celsius scale

A) 40° C B) 94° C C) 93.3 °C D) 30° C

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Question 57

Which element has the atomic number 3?

A) Boron B) Lithium C) Beryllium D) Sodium

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Question 58

Fe has 26 protons in its nucleus. What are the number of electrons in Fe²+ ( II ) ion?

A) 24 B) 26 C) 28 D) 13

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Question 59

Which of the following elements has the lowest melting point?

A) Xenon B) Iodine C) Barium D) Magnesium

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Question 60

The Chemical formula of Ammonium nitrate is _________

A) (NH2)2NO3 B) NH4NO3 C) NH4(NO3)2 D) NH2NO3

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