Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
When dilute hydrochloric acid is added to iron(ll)sulphide, the gas evolved will?
turn moist red litmus paper blue
turn lime water milky
blacken lead acetate paper
rekindle a glowing splint
burn a sqeakly pop
Correct answer is C
The gas liberated is H\(_2\)S which in the presence of lead acetate paper gives a black coloration
20
25
50
75
90
Correct answer is D
No explanation has been provided for this answer.
Ethyl ethanoate
Methyl ethanoate
Ethyl methyl ketone
Butanol
None
Correct answer is A
This is an ESTERIFICATION REACTION of Alkanoic acid and Alkanol to yield an Ester
20 cm3 of 1 M H\(_2\)SO\(_4\) is mixed 20 cm\(^3\) of 1 M NaOH. The resulting solution is?
acidic with a molarity of 0.50 M H2SO4
acidic with a molarity of 0.25 H2SO4
neutral
alkaline with a molarity of 0.25 M NaOH
alkaline with a molarity of 0.50 M NaOH
Correct answer is A
The balanced equation for the reaction is:
\(2NaOH + H_2 SO_4 \to Na_2 SO_4 + 2H_2 O\)
\(\therefore 1M H_2 SO_4 \to 2M NaOH\)
\(1M NaOH \to 0.5M H_2 SO_4\)
The resulting solution is Acidic with 0.5M H\(_2\)SO\(_4\).
When ethene gas reacts with chlorine gas to form 1, 2-dichloroethene, the reaction is called?
substitution
addition
polymerization
hydrolysis
reduction
Correct answer is B
No explanation has been provided for this answer.