by Sunday | Dec 9 | Chemistry WAEC
A. Cu2O B. CuO C. CuO2 D. CuO4 Correct Answer: Option B Explanation Cu : O 0.067 : 0.066 mole ratio 0.067/0.066 : 0.066/0.066 = 1 : 1 = CuO
by Sunday | Dec 9 | Chemistry WAEC
A. oxidised B. reduced C. decomposed D. dissociated Correct Answer: Option A Explanation Reaction: 2AgNO3+Zn→Zn(NO3)2+2Ag The oxidation number of Zn in the reactant is 0, and the product is +2. Therefore, it is...
by Sunday | Dec 9 | Chemistry WAEC
A. charge density of the atoms B. ductility of the metal C. number of valence electrons D. total number of electrons in the atom Correct Answer: Option C C. number of valence electrons Explanation It is determined by the difference in the electron structures of the...
by Sunday | Dec 9 | Chemistry WAEC
A. < 7 B. > 7 C. = 7 D. 0 Correct Answer: Option A A. < 7 Explanation Cl2+H2O → HCl+HOCl The two compounds in the product end are acidic and hence, their mixture is acidic. Hence, the pH is < 7
by Sunday | Dec 9 | Chemistry WAEC
A. heat capacity B. boiling point C. mass D. colour Correct Answer: Option B B. boiling point Explanation Any pure substance will have a specific melting and boiling point. The presence of impurities alters the boiling point of...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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