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 salt formed from a weak acid and a strong base hydrolyzes in water to form
A saturated solution
an acidic solution
a buffer solution
an alkaline solution
Correct answer is D
This is a solution formed from the hydrolyses of an alkali in water.
Incomplete oxidation of ethanol yields
CH3COOH
CH3COCH3
CH3CH2OCH2CH3
CH3CHO
Correct answer is D
C2H5OH → CH3CHO → CH3COOH
Ethanol.....oxidation Ethanal........Ethanoic Acid
Primary alcohol oxidises to aldehyde and later to carboxylic acid.
Secondary alcohol oxidises to ketones.
Ethanol is an example of primary alcohol and primary alcohol can be oxidised to aldehyde and carboxylic acid. Wherein, incomplete oxidation of primary alcohol yields aldehyde also known as alkanal while complete oxidation of primary alcohol yields carboxylic acid.
1.6 \(\times\) 10-4
6.3 \(\times\) 10-11
6.3 \(\times\) 10-4
1.6 \(\times\) 10-11
Correct answer is B
PH = - Log[ H+ ]
PH + POH =14
POH = 14 - 3.8
POH = 10.2
POH = - Log[ OH- ]
10.2 = - Log[ OH- ]
10-10.2 = [ OH- ]
[ OH- ] = 6.3 x 10-11
NH2RCHCOOH
CHO
CO
CNH2
Correct answer is A
Xanthopreitic test for the presence of protein, when conc nitric acid is added to the drop, an intense yellow colouration is observed.
It contains all the functional group of protein which includes the amino, alkanol and the carboxylic group. Adding few drops of conc HNO3 to a protein, gives an intense yellow colouration.
It is called Xanthopreitic test.
2–ethyl butane
butane
2–methyl butane
2–methyl propane
Correct answer is C
C5H12 has 5 carbons acid 12 hydrogens.
2–methyl butane
No of carbon=5
No of hydrogen=12