JAMB REVIEW TEST #2

Compiled from UME Chemistry past questions

By Kingsley Idiagbor, B.Sc. (Hons), NCE, PGDCs, MNSM

1. The IUPAC name for the compound
   
   is (A)isopropylethene(B)acetylene (C)3-methylbutane(D)2-methylbutane(E)5-methylpentane[UME 1984Q.49]
2. An organic compound contains 72% carbon, 12% hydrogen and 16% oxygen by mass. The empirical formula of the compound is...(A)C₆H₁₀O₃ (B) C₁₂H₁₂O (C) C₆H₁₂O (D) C3CH11 (E) [UME 1985 Q.3]
3. The energy change (DH) for the reaction
   CO_(g) + ¹/₂O_2(g)--->CO_2(g) is...
   (A)-503.7kJ(B) +503.7kJ (C)-282.9kJ(D)+282.9kJ(E)+393.3kJ(DH_f[CO]=-110.4kJmol^-1;(DH_f[CO₂]=-393.3kJmol^-1 [UME 1985 Q.30]
4. 20cm³ of oxygen diffuse through a porous plug in 50s. How long will 80cm³of methane (CH⁴ take to diffuse through the same porous plug under the same conditions(A)20s(B) 2.0s (C)14s(D)7s(C=12;O=16;H=1)[UME 1986 Q.6]
5. What mass of divalent metal, M,with atomic mass of 46 would react with excess HCl to liberate 22cm³of dry hydrogen gas measured at s.t.p (A) 8g(B)4g (C)0.8g (D) 0.4g(GMV=22.4dm³) [UME 1986 Q. 2]
6. 0.46g of ethanol when burned raises the temperature of 50g of water by 14.3K. Calculate the heat of combustion of ethanol(A) +3000kJmol^-1 (B) +300kJmol^-1 (C) -300kJmol^-1 (D) -3000kJmol^-1 (Specific heat capacity of water=4.2JgK^-1 [UME 2000 Q. 28]
7. 50cm³ of carbon (II) oxide was exploded with 150cm³ of air containing 20% oxygen by volume. Which of the reactants was in excess? (A)carbon(II)oxide (B) carbon (IV) oxide (C) oxygen (D)nitrogen  [UME 2000 Q. 4]
8. The compound below
   
   is an--------(A) ethene (B) ester (C) alkane (D)alkanol [UME 2000 Q. 48]
9. What mass of water is produced when 8g of hydrogen reacts with excess oxygen? (A) 72g (B) 36g (C) 16g (D) 8g [UME 2001 Q. 2]
10. What current in amperes will deposit 2.7g of aluminum in 2 hrs?   (A) 32 (B) 16 (C)8 (D) 7 (Al= 27, 1F=96500Coul)  [UME 2001 Q.24 ]

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