(1).An example of an acidic oxide is a. NO b. CO c. CuO d. N2O
(2).how much NaOH is required to make 250cm3 of 1 molar solution
(3).in the electrolytic extraction of Ca from CaCl2,the cathode is?
(4)Which acid is dibasic a. HCl. B. Trioxosulphate (iv) c. Dioxonitrate(iii) d. Ethanoic
5.which salt is significantly more soluble in a strong acid than in water a. PbF2. B. PbCl2 c. PbBr2. D. PbI2
6.how many type of inter-atomic bond is present in Na2CO3?
7.the metal whose Ore can be concentrated by passing it through a magnetic separation is a. Zn. b. Sn. c. Can. d. Ca?
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Asked by Emzy Reid on 24th December, 2019
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