IGCSE O Level Chemistry Practice Test 79

Relative Molecular Mass Quiz PDF: Questions and Answers - 79

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Relative Molecular Mass Questions and Answers PDF Download: Quiz 79

MCQ 391: Relative molecular masses can be calculated by the

A) relative atomic mass

B) relative mass of a covalent compound

C) relative atomic masses of individual atoms

D) adding relative compound masses

MCQ 392: A compound results from the chemical combination of

A) two or more atoms only

B) two or more non-metals only

C) two or more metalloids

D) two or more atoms and non-metals

MCQ 393: Phosphorus can have a valency of

A) 2 or 4

B) 4 or 6

C) 3 or 5

D) 2 or 1

MCQ 394: In Liebig condenser, the

A) coldest part of the condenser is at the top

B) water enters in the jacket from the top

C) coldest part of the condenser is at the bottom

D) water enters in the jacket from the middle tubules

MCQ 395: In the electrolysis of concentrated HCl, Cl₂ is given off at cathode due to

A) high concentration hydroxide ions

B) low concentration of chloride ions

C) high concentration of Chloride ions

D) none of above

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