by Sunday | Sep 16 | Chemistry JAMB
NH3(g) + HCl(s) → NH4Cl (s) A. positive B. zero C. negative D. intermediate Correct Answer: Option C – negative Explanation Entropy s is a measure of the degree of disorder or randomness of a substance. The entropy change in the system is...
by Sunday | Sep 16 | Chemistry JAMB
A. positive change B. negative entropy change C. no entropy change D. a minimum entropy change Correct Answer: Option C – no entropy change Explanation No entropy change because the sugar will not change the chemical equivalent of the tea. Options A,B,D are not...
by Sunday | Sep 16 | Chemistry JAMB
A. Li, Be, Al and D B. Na, P, O and Cl C. B, C, N, and O D. Na, Mg, S and Ar Correct Answer: Option D – Na, Mg, S and Ar Explanation Na, Mg, S and Ar are the set of elements that belong to third period of the periodic table. Option A, B, C have elements which...
by Sunday | Sep 16 | Chemistry JAMB
A. 7 B. 6 C. 5 D. 4 Correct Answer: Option B – 6 Explanation The oxidation state of K2Cr2O7 is +6. +2+2x+(−2×7)=0 2x=12 x=+6
by Sunday | Sep 16 | Chemistry JAMB
A. CH2O B. C3H6O3 C. C6H12O6 D. C6H12O3 Correct Answer: Option C – C6H12O6 Explanation C = 40%, 40/12 = 3.33 H = 6.7%, 6.7/1 = 6.7 O = 53.3%, 53.3/16 = 3.33 C = 3.33/3.33 = 1 H = 6.7/3.33 = 2 O = 3.33/3.33 = 1 (CH2O)n = 180 (12 + 2 + 16)n = 180 30n = 180 n = 6 =...
by Sunday | Sep 16 | Chemistry JAMB
A. Bomb calorimeter B. Catalytic cracker C. Fractionating column D. Thermometer Correct Answer: Option C – Fractionating column Explanation Fractionating column contains petrol with different densities.
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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