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 following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT
HOCH2 – CH2OH
H2C –C =C– CH3
H3C – HC = CH2
H2C = CH2
H3C – C =CH
Correct answer is A
No explanation has been provided for this answer.
CH
CH3
CH4
C2H2
C2H6
Correct answer is B
Relative No of Moles for Carbon = 79.2% ÷ 12 = 6.6
Relative No of Moles for Hydrogen = 20.8% ÷ 1 = 20.8
Ratio of Moles = Carbon 6.6 ÷ 6.6 = 1 Hydrogen = 20.8 ÷ 6.6 ~ 3
EMPIRICAL FORMULA IS CH\(_3\)
Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group
alkanal
alkane
alkanoate
alkene
alkyne
Correct answer is B
Alkanes have the general formula of CnH2n+2 where n is the number of carbon atoms.
Alkenes have the general formula CnH2n.
The general formula for Alkynes is CnH2n-2.
The process involved in the decomposition of sugar by an enzyme is called
dehydration
esterification
fermentation
polymerization
saponification
Correct answer is C
No explanation has been provided for this answer.
Which of the following equations is NOT balanced?
CH4(g) + 202(9) → CO2(g) + 2H2O(g)
CU(S) + HNO3(aq) → Cu(NO3)2(aq) + 4H2O(I) + NO(g)
2KCIO3(s) → 2KCI(s)+ 3O2(g)
NaH(s) + H2O(1) → NaOH(aq) +H2(g)
Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq)
Correct answer is B
No explanation has been provided for this answer.