Chemistry Past Questions and Answers

Which of the following is acceptable as the organic product of the reaction of ethanoic acid and ethanol with an acid catalyst?

A Ethyl ethanoate
B Methyl ethanoate
C Ethyl methyl ketone
D Butanol
E None

Question 177:

Given the mean atomic mass of chlorine prepared in the laboratory to be 35.5 and assuming that chlorine contains two isotopes of mass number 35 nad 37, what is the percentage composition of the isotope of mass number 35?

A 20
B 25
C 50
D 75
E 90

Question 178:

When dilute hydrochloric acid is added to iron(ll)sulphide, the gas evolved will?

A Turn moist red litmus paper blue
B Turn lime water milky
C Blacken lead acurate paper
D Rekindle a glowing splint
E Burn a sqeakly pop

Question 179:

In which of the following is the oxidation state of oxygen different from its value in water?

A OH-
B H3O+
C O-
D H2O2
E SO2

Question 180:

Which of the following silver halides is readily soluble in ammonium hydroxide?

A Agl
B AgBr
C AgCl
D AgF
E None of the above