2019 - JAMB Chemistry Past Questions and Answers - page 1
A second alkanol can be oxidized to give an
alkanone
alkyne
alkanoic acid
alkanal
With a suitable oxidising agent (such as acidified dichromate solution, or, acidified permanganate solution), secondary alkanols (alcohols) can be oxidised to alkanones (ketones).
Which of the following will give a precipitate with an aqueous solution of copper (I) chloride?
The IUPAC name for CH\(_3\)CH\(_2\)COOCH\(_2\)CH\(_3\) is
methylpropanoate
ethylethanoate
ethylpropanoate
methylethanoate
Ethyl propionate is a compound with formula C2H5(C2H5COO). It is the ethyl ester of propionic acid. It has a pineapple-like odour. Some fruits such as kiwis and strawberries contain ethyl propionate in small amounts. More
A certain hydrocarbon on complete combustion at s.t.p produced 89.6dm\(^3\) of CO\(_2\) and 54g of water. The hydrocarbon should be
2-methylprop-1-ene is an isomer of
3-methyl but-1-ene
2-methyl but-1-ene
but-2-ene
pent-2-ene
Hydrocarbons which will react with Tollen's reagent conform to the general formula
C\(_n\)H\(_{2n}\)
C\(_n\)H\(_{2n + 2}\)
C\(_n\)H\(_{2n - 2}\)
C\(_n\)H\(_{2n + 1}\)OH
the general formula of Hydrocarbons which will react with Tollen's reagent is C\(_n\)H\(_{2n - 2}\)
The IUPAC name of the compound CF\(_3\)CHBrCl is
Synthetic rubber is obtained from the polymerization of
neoprene
isoprene
butandiene
propylene
Synthetic rubber, like other polymers, is made from various petroleum-based monomers. The most prevalent synthetic rubber is styrene-butadiene rubbers (SBR) derived from the copolymerization of styrene and 1,3-butadiene. Other synthetic rubbers include: polyisoprene, prepared by polymerization of synthetic isoprene.
Burning magnesium ribbon in air removes which of the following
(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide?
i and iv only
i, ii, iii and iv only
i only
i and ii only
Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with
Pb
Zn
Ca
Na