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 structural formal above is ethanoic acid is
A
B
C
D
E
Correct answer is E
Ethanoic acid is CH3COOH
2-methylbut-3-ene
2-methylbut-4-ene
3-methylbut-2-ene
3-methylbut-1-ene
3-methylpent-1-ene
Correct answer is D
No explanation has been provided for this answer.
NaOH solution by 70 cm3
NaOH solution, by 60 cm3
NaOH solution by 40 cm3
Al(NO3)3 solution by 20 cm3
Al(NO3)3 solution by 10 cm3
Correct answer is C
No explanation has been provided for this answer.
1.35g
1.00g
0.70g
0.65g
0.00g
Correct answer is A
\(Zn + H_2 SO_4 → ZnSO_4 + H_2\)
1 mole of Zn = 1 mole \(H_2SO_4\)
no of moles of \(H_2SO_4\) = C X V = 1 X 10/1000 = 0.01moles.
0.01mole \(H_2SO_4\) = 0.01 mole Zn
mass of Zn = 0.01 x 65(given) = 0.65g
therefore, the mass of undissolved Zn = 2.00(given) - 0.65 = 1.35g.
zn + 2HCl → ZnCl2 + H2
The rate of the above reaction will be greatly increased if
the zinc is in the powered form
a greater volume of the acid is used
a smaller volume of the acid is used
the reaction vessel is immersed in an ice-bath
the zinc is in the form of pellets
Correct answer is A
No explanation has been provided for this answer.