Post Utme Chemistry Past Questions and Answers

Question 906:

When air is passed througith alkaline pyragallol. the component of air absorbed by the is ____________

A. Oxygen
B. Neẹn
C. Nitrogen
D. Argon

Question 907:

When wâter dropstane added to calcium carbide in a container and the gas produced is passed through jet and lighted, the resultant flame is called an

A. Oxyethane fiame
B. Oxyethyleno flame
C. Hydroxide flame
D. Oxyacetylene flame

Question 908:

If the relative formula mass of a hydroxide \(M ( OH )_{3}\) is \(78 gmo1 1^{-1}\) what is the relative atomic mass, \(M\) ?

A. 61
B. 59
C. 30
D. 27

Question 909:

An ion with a single negative charge becomes an atom by

A. Losing an electron
B. Losing a neutron
C. Gaining a neutron
D. Gaining an electron

Question 910:

\(CH _{3} COOH + CH _{3} OH - CH _{3} COOCH _{3}+ H _{2}\) O.
The reaction represented by the equation above is

A. Neutralization reaction
B. Esterification reaction
C. De esterification reaction
D. Hydrolysis reaction