Waec 2014 Chemistry Past Questions And Answers

Note: You Can Select Post UTME Schools Name Below The Exam Year.
1

Which of the following compounds determines the octane rating of petrol?

  • A. 1,2,3 - trimethyl pentane
  • B. 2,3,5 - trimethyl octane
  • C. 2,3,5 - trimethyl pentane
  • D. 2,2,4 - trimethyl pentane
View or Post an Explanation 2307 (0)WAEC 2014 OBJ
2

The oxide from electric power station is

  • A. carbon (IV) oxide
  • B. copper (ll) oxide
  • C. nitrogen (IV) oxide
  • D. sulphur (IV) oxide
View or Post an Explanation 2316 (0)WAEC 2014 OBJ
3

Which type of reaction is illustrated by the following equation? C12H26 → 5C2H4+ C2H6

  • A. Addition
  • B. Cracking
  • C. Hydrogenation
  • D. Polymerization
View or Post an Explanation 2308 (0)WAEC 2014 OBJ
4

The purity of a solid sample can best be determined by its

  • A. boiling point
  • B. melting point
  • C. conductivity
  • D. solubility
View or Post an Explanation 2313 (0)WAEC 2014 OBJ
5

The electron configuration of26Fe3+ is

  • A. [Ar]4s23d6
  • B. [AR]4s23d3
  • C. [AR]4s13d4
  • D. [AR]4s03d5
View or Post an Explanation 2269 (0)WAEC 2014 OBJ
6

The enzyme that catalyses the conversion of glucose te ethanol and carbon (IV) oxide is

  • A. diastase
  • B. maltase
  • C. ptyalin
  • D. zymase
View or Post an Explanation 2309 (0)WAEC 2014 OBJ
7

Hydrogen bonds are formed between molecules containing a hydrogen atom bonded to a

  • A. strongly electronegative atom
  • B. non-polar species
  • C. diatomic element
  • D. complex ion
View or Post an Explanation 2265 (0)WAEC 2014 OBJ
8

Which of the following organic compounds could be represented by the empirical formula CH2O?

  • A. Ethanal
  • B. Ethane
  • C. Ethanol
  • D. Ethanoic acid
View or Post an Explanation 2311 (0)WAEC 2014 OBJ
9

Which of the following salts on hydrolysis would give an alkaline solution?

  • A. NH4CI(s)
  • B. AICI3(s)
  • C. CH3COONa(s)
  • D. NH4NO3(s)
View or Post an Explanation 2301 (0)WAEC 2014 OBJ
10

(a)(i) Define ionic bond.

(ii) What type of bond (s) exist (s) in: I. magnesium oxide; II. ammonium ion?

(b) Determine the oxidation number of sulphur in Na\(_2\)S\(_2\)O\(_2\).

(c) State Faraday's first law.

(d) Give one example each of: (i) acid salt; (ii) base salt.

(e) Name the type of energy change that occurs in each of the following processes

(i) I\(_{2(s)}\) \(\to\) I\(_{2(g)}\)

(ii) Cl\(_{(g)}\) + e\(^{-}\) \(\to\) Cl\(^{-_(g)}\)

(f) State the effect of each of the following aqueous solutions on litmus paper: (i) Na\(_2\)SO\(_{4(aq)}\) (ii) AlCl\(_{3(aq)}\)

(g) Define the term efflorescence.

(h) Give two uses of activated charcoal.

(i) State one use of each of the following processes in the chemical industry: (i) hydrogenation of vegetable oil; (ii) cracking; (iii) esterification.

(j) Calculate the amount of silver deposited in moles when 10920 coulombs of electricity is passed through a solution of a silver salt. [ Faraday constant-- 96500 C mol\(^{-1}\)]

View or Post an Explanation 22218 (0)WAEC 2014 THEORY