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.
In which of the following processes are larger molecules broken down into smaller molecules?
Vulcanization of rubber
Hydrogenation of palm oil
Hydrolysis of starch
Polymerization
Esterification
Correct answer is C
No explanation has been provided for this answer.
The gas produced when a mixture of sodium propanoate and soda lime is heated is
methane
pentane
ethane
butene
ethyne
Correct answer is C
So during the presence of methane, sodium ethanoate with soda lime is used, using sodium propanoate with sodium will produce ethane according to the equation below
\(\CH_3CH_2COONa + NaOH → C_2H_6 + Na_2CO_3\)\
Fructose and glucose are classified as carbohydrates because they
are crystalline white solids
are energy -giving substances
are naturally occurring organic compounds
contain carbon oxygen and hydrogen
conform to the general formula Cx(H2O)y
Correct answer is E
No explanation has been provided for this answer.
The following can be obtained directly from the destructive distillation of coal except
ammoniacal liquor
coke
producer gas
coal gas
coal tar
Correct answer is C
No explanation has been provided for this answer.
Which of the following is hydrocarbons is unsaturated?
Ethane
Benzene
Propane
2 - methylbutane
2,2,4-trimethylpentane
Correct answer is B
No explanation has been provided for this answer.
The following statements about graphite are correct except that it
is used as a lubricant
has a network structure
contains mobile free electrons
is good conductor
is an allotrope of carbon
Correct answer is B
No explanation has been provided for this answer.
neutralization
formation
solution
dilution
hydration
Correct answer is A
No explanation has been provided for this answer.
there is an increase in entropy
There is anincrease in gaseous volume
Carbon (lV) oxide is produced
The oxidation number of carbon increases from 0 to +2
The reaction is exothermic
Correct answer is C
No explanation has been provided for this answer.
64g
32g
12.8g
6.4g
3.2g
Correct answer is E
No explanation has been provided for this answer.
Sodium chloride cannot conduct electricity in the solid state because it
is a normal salt
is highly soluble in water
is an electrovalent compound
does not have any effect on litmus
does not contain mobile ions
Correct answer is E
No explanation has been provided for this answer.
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