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.
Which of the following industrial processes depends on the action of enzymes?
Liquefaction of air
Manufacture of soap
Brewing of beer
Catalytic cracking
Correct answer is C
The brewing of beer has to do with fermentation.
(CH 3)2CHCH2OH
CH3CH2CH(OH)CH3
(CH3)3COH
CH3CH2CH2CH2OH
Correct answer is C
No explanation has been provided for this answer.
An alkanol can be prepared by the reaction of an alkene with
concentrated tetraoxosulphate (VI) acid
bromine tetrachloroethane
aqueous potassium tetraoxomanganate (VII)
sodium hydroxide solution
Correct answer is A
An alkene reacts with conc. H\(_2\)SO\(_4\) to yield an alkyl hydrogen tetraoxosulphate (VI). The compound formed undergoes hydrolysis when boiled with water to yield an alcohol.
Which of the following substances would not produce ethanol when fermented?
Cane sugar
Glucose
Starch
Vinegar
Correct answer is D
Vinegar is a product from fermentation. It can be gotten from the fermentation of ethanol.
cracking
fermentation
polymerization
reforming
Correct answer is A
In the reaction, a complex hydrocarbon is broken down into two simpler hydrocarbons. This is cracking.
The oxidation number of Fe in [Fe(CN)\(_6\)]\(^{3-}\) is
+3
+2
-2
-3
Correct answer is A
Let the oxidation number of Fe in the compound [Fe(CN)\(_6\)]\(^{3-}\) be x.
x + 6(-1) = -3
x - 6 = -3;
x = -3 + 6
x = +3
Particle size of CuO(s)
Concentration of H2SO4(aq)
Temperature of the reacting mixture
Pressure of reaction system
Correct answer is D
The reaction rate between a solid and liquid will not be affected by pressure. Pressure majorly affects the reaction rate for gases.
A spot of oil paint on a shirt can best be removed using?
brine
detergent
kerosine
warm water
Correct answer is C
To remove oil paints, the use of chemicals is usually required, including turpentine, acetone, kerosene, and various paint thinners.
The hydrolysis of NH\(_4\)CI gives
an acidic solution
an alkaline solution
a buffer solution
a neutral solution
Correct answer is A
When you dissolve ammonium chloride crystals in water (H\(_2\)O), the ammonium chloride compound decomposes into its component ions: NH\(_4 ^+\) and Cl\(^-\). The reaction of these ions with water gives an acidic solution.
Seven-Up Bottling Company Limited Graduate Trainee Recruitment Program 2024
Sales Representative at Halliburton Energy Services Nigeria Limited
Accountant at Pete Ground Services Limited
Accountant at Fortesoft Systems Limited
Management Trainee (Customer Service and Accounting) at WorQulture
Career Counselor at at Fortesoft Systems Limited
Cameraman and Editor at BantuPage Limited
Junior Accountant at WorQulture
Aircraft Cleaner / Attendant at Pete Ground Services Limited
Associate - Front Desk Officer at PricewaterhouseCoopers (PwC) Nigeria
