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.
The pollutant that contributes to the depletion of the ozone layer is
CFCs
NO2
SO2
CO
Correct answer is A
No explanation has been provided for this answer.
The compound produced when sodium peroxide is heated with excess sodium is
Na2CO3
Na2O
NaNO2
NaOH
Correct answer is B
No explanation has been provided for this answer.
0.05 moldm-3
0.30 moldm-3
0.50 moldm-3
0.40 moldm-3
Correct answer is C
2g NaOH is contained in 100cm3
Xg NaOH is contained in 1000cm3
Xgram = \(\frac{2\times 1000}{100}\) = 20g
Mole = \(\frac{20}{40}\) = 0.50mol/dm3
The process that requires the use of hardwater in its operation is
Tanning
Bottling
Laundry
Dyeing
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is true about 2-methylpropane and butane
They have different number of carbon atoms
They are members of same homologous series
They have the same boiling points
They have different chemical properties
They are members of same homologous series and Isomers as well
Correct answer is B
No explanation has been provided for this answer.
The compounds CH3CH2CHO and CH3COCH3 can be distinguished from each other using
Dilute ammonia
Benedict's solution
Tollen's reagent
Sodium hydroxide solution
Correct answer is C
No explanation has been provided for this answer.
The colour of litmus in an alkaline medium is
Red
Yellow
Pink
Blue
Correct answer is D
No explanation has been provided for this answer.
6.2
6.8
7.1
6.9
Correct answer is D
(\(\frac{90}{100}\) x 7) + (\(\frac{10}{100}\) x 6)
= 6.3 + 0.6 = 6.9
The industrial preparation of hydrogen gas from water gas is referred to as
Bosch process
Contact process
Haber process
Bayer Process
Correct answer is A
No explanation has been provided for this answer.
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