Valency Table Quiz PDF: Questions and Answers - 47

MCQ 231: Valency is numerically equal to the

1. charge of an ion
2. combining power of an atom
3. combining power of a radical
4. all of above

MCQ 232: PH values have a range of

1. 1 to 7
2. 0 to 10
3. 1 to 14
4. 0 to 14

MCQ 233: The chemical formula of calcium nitrate is

1. CNOH
2. Ca(NO₃)₂
3. CaNO₃
4. CaNO₃

MCQ 234: What is true about pure substances?

1. they have fixed and exact boiling point
2. they have fixed and exact melting points
3. they form only one post on chromatogram
4. all of above

MCQ 235: During a chemical reaction, the

1. mass of catalyst remains unchanged
2. physical state of catalysts remain unchanged
3. changes in the chemical composition of catalysts may be observed
4. chemical composition of the catalyst may change