Chemistry, 2006, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2006

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

41 - 49 of 49 Questions

#	Question	Ans
41.	In the electrolysis of CuSO_4(g) using platinum electrodes, the reaction at the anode is A. 4H⁺ + 4e^- → 2H₂ B. 4OH^- - 4e^- → 2H₂O + O₂ C. 2OH - 2e^- → 2OH D. 2OH^- + 2OH^- → 2H₂O + O₂	B
42.	Na2CO3(g) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g) How many moles of sodium trioxocarbonate (IV) are there in a 25 cm3 solution which required 10cm3 of 0.05 mol dm-3 hydrochloric acid solution to neutralize it? A. 1.000 mole B. 0.100 mole C. 0.010 mole` D. 0.111 mole Show Content Detailed Solution \(\frac{C_A V_A}{C_BV_B} = \frac{a}{b}\) \(\frac{0.05 \times 10}{C_B \times 25} = \frac{2}{1}\) 50CB = 0.5 CB = \(\frac{0.5}{50} = \frac{1}{100}\) = 0.01	C
43.	If the heat of combustion of hydrogen is -285.8kJ, What is the heat of formation of water? A. +571.6 kJ B. -571.6 kJ C. -285.8 kJ D. +285.8 kJ	C
44.	5SO_2(g) + 2KMnO_4(aq) + 2H₂O_(l) → K₂SO₄ + 2MnSO_4(aq) + 2H₂SO_4(aq) In the reaction above, the products give a A. purple solution B. purple precipitate C. colourless precipitate D. colourless solution	D
45.	In the diagram above, gas X is A. hydrogen B. chlorine C. oxygen D. hydrogen chloride	C
46.	In the diagram above, mixture Y is A. NH₄NO_3(s) + CaSO_4(s),/sub> B. NH₄CL_(s) + NaNO_2(s) C. NH₄NO_2(s) + Na₂SO_4(s) D. NH₄CL_(s) + Ca(OH)_2(s)	D
47.	The oxidation of the compound above produces A. 2-butanone B. 2-butanal C. 3-butanal D. 3-butanone	A
48.	2-methylbut-2-ene has the structure A. A B. B C. C D. D	D
49.	Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate (IV)? A. A B. B C. C D. D	B

41.	In the electrolysis of CuSO_4(g) using platinum electrodes, the reaction at the anode is A. 4H⁺ + 4e^- → 2H₂ B. 4OH^- - 4e^- → 2H₂O + O₂ C. 2OH - 2e^- → 2OH D. 2OH^- + 2OH^- → 2H₂O + O₂	B
42.	Na2CO3(g) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g) How many moles of sodium trioxocarbonate (IV) are there in a 25 cm3 solution which required 10cm3 of 0.05 mol dm-3 hydrochloric acid solution to neutralize it? A. 1.000 mole B. 0.100 mole C. 0.010 mole` D. 0.111 mole Show Content Detailed Solution \(\frac{C_A V_A}{C_BV_B} = \frac{a}{b}\) \(\frac{0.05 \times 10}{C_B \times 25} = \frac{2}{1}\) 50CB = 0.5 CB = \(\frac{0.5}{50} = \frac{1}{100}\) = 0.01	C
43.	If the heat of combustion of hydrogen is -285.8kJ, What is the heat of formation of water? A. +571.6 kJ B. -571.6 kJ C. -285.8 kJ D. +285.8 kJ	C
44.	5SO_2(g) + 2KMnO_4(aq) + 2H₂O_(l) → K₂SO₄ + 2MnSO_4(aq) + 2H₂SO_4(aq) In the reaction above, the products give a A. purple solution B. purple precipitate C. colourless precipitate D. colourless solution	D
45.	In the diagram above, gas X is A. hydrogen B. chlorine C. oxygen D. hydrogen chloride	C

46.	In the diagram above, mixture Y is A. NH₄NO_3(s) + CaSO_4(s),/sub> B. NH₄CL_(s) + NaNO_2(s) C. NH₄NO_2(s) + Na₂SO_4(s) D. NH₄CL_(s) + Ca(OH)_2(s)	D
47.	The oxidation of the compound above produces A. 2-butanone B. 2-butanal C. 3-butanal D. 3-butanone	A
48.	2-methylbut-2-ene has the structure A. A B. B C. C D. D	D
49.	Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate (IV)? A. A B. B C. C D. D	B