Chemistry, 2016, WASSCE/WAEC MAY/JUNE, Exam, Paper 1 | Objectives

Paper Info

Year :

2016

Title :

Chemistry

Exam :

WASSCE/WAEC MAY/JUNE

Paper 1 | Objectives

41 - 50 of 50 Questions

#	Question	Ans
41.	Amino acids are obtained from proteins by A. Hydrolysis B. Oxidation C. Polymerization D. Reduction	A
42.	When a compound X is heated with concentrated tetraoxosulphate(VI)acid, it produces an alkene. X ia an A. Alkane B. Alkanol C. Alkanoate D. Alkyne	B
43.	Ripening of fruits is hastened by using A. Ethanol B. Ethane C. Ethene D. Ethyne	C
44.	The compound that makes palm wine taste sour after exposure to the air for few days is A. Ethanol B. Ethanoic acid C. Methanol D. Methanoic acid Show Content Detailed Solution The ethanol (alcohol content) of the wine, is oxidized, by the oxygen in the air into ethanoic acid.	A
45.	Which of the following compounds is/are secondary alkanols? i) CH₃CH(CH₃)CH₃OH ii) CH₃CH₂CH(OH)CH₃ iii) CH₃C(OH)(CH₃)CH₃ A. I only B. II only C. I and III only D. II and III only	B
46.	Consider the following reaction equation C₂H_4(g) + 3O_2(g) \(\to\) 2CO_2(g) + 2H₂O_(l). The volume of oxygen at s.t.p that will be required to burn 14g of ethene is [C₂H₄ = 28; Molar volume of gas at s.t.p = 22.4dm³ A. 64.2dm³ B. 33.6dm³ C. 11.2dm³ D. 3.73dm³ Show Content Detailed Solution C₂H_4(g) + 3O_2(g) \(\to\) 2CO_2(g) + 2H₂O_(l) 1 mole of ethene required 3 moles of O₂ 28g of ethene required 3 x 22.4dm³ of O₂ 14g will require \(\frac{14 \times 3 \times 22.4dm^3}{28}\) = 33.6dm³	B
47.	Which of the following sources of energy contributes to green-house effect? A. Natural gas B. Nuclear C. Wind D. Solar	A
48.	A consequences of global warming is A. Air pollution B. Flooding C. Increased humidity D. Water pollution	A
49.	Which of the following metals is common to both brass and bronze? A. Aluminium B. Copper C. Lead D. Iron	B
50.	The alkanol obtained from the production of soap is A. Dihydric Alkanol B. Tertiary Alkanol C. Trihydric Alkanol D. Monohydric Alkanol	C

41.	Amino acids are obtained from proteins by A. Hydrolysis B. Oxidation C. Polymerization D. Reduction	A
42.	When a compound X is heated with concentrated tetraoxosulphate(VI)acid, it produces an alkene. X ia an A. Alkane B. Alkanol C. Alkanoate D. Alkyne	B
43.	Ripening of fruits is hastened by using A. Ethanol B. Ethane C. Ethene D. Ethyne	C
44.	The compound that makes palm wine taste sour after exposure to the air for few days is A. Ethanol B. Ethanoic acid C. Methanol D. Methanoic acid Show Content Detailed Solution The ethanol (alcohol content) of the wine, is oxidized, by the oxygen in the air into ethanoic acid.	A
45.	Which of the following compounds is/are secondary alkanols? i) CH₃CH(CH₃)CH₃OH ii) CH₃CH₂CH(OH)CH₃ iii) CH₃C(OH)(CH₃)CH₃ A. I only B. II only C. I and III only D. II and III only	B

46.	Consider the following reaction equation C₂H_4(g) + 3O_2(g) \(\to\) 2CO_2(g) + 2H₂O_(l). The volume of oxygen at s.t.p that will be required to burn 14g of ethene is [C₂H₄ = 28; Molar volume of gas at s.t.p = 22.4dm³ A. 64.2dm³ B. 33.6dm³ C. 11.2dm³ D. 3.73dm³ Show Content Detailed Solution C₂H_4(g) + 3O_2(g) \(\to\) 2CO_2(g) + 2H₂O_(l) 1 mole of ethene required 3 moles of O₂ 28g of ethene required 3 x 22.4dm³ of O₂ 14g will require \(\frac{14 \times 3 \times 22.4dm^3}{28}\) = 33.6dm³	B
47.	Which of the following sources of energy contributes to green-house effect? A. Natural gas B. Nuclear C. Wind D. Solar	A
48.	A consequences of global warming is A. Air pollution B. Flooding C. Increased humidity D. Water pollution	A
49.	Which of the following metals is common to both brass and bronze? A. Aluminium B. Copper C. Lead D. Iron	B
50.	The alkanol obtained from the production of soap is A. Dihydric Alkanol B. Tertiary Alkanol C. Trihydric Alkanol D. Monohydric Alkanol	C