Which of the following is an ore of aluminium?
Which of the following is an ore of aluminium? A. Haematite B. Magnetite C. Siderite D. Bauxite E.…
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The following oxides react with both acids and bases to form salts except
The following oxides react with both acids and bases to form salts except A. zinc oxide B. lead…
Which of the following metals is not extracted by electrolysis ?
Which of the following metals is not extracted by electrolysis ? A. lron B. Sodium C. Calcium D.…
Which of the following when heated strongly in air will leave a metal as residue?
Which of the following when heated strongly in air will leave a metal as residue? A. Sodium trioxonitrate…
Which of the following is used as water softener?
Which of the following is used as water softener? A. Na2CO3.10H2O B. CuSO4. 5H2O C. MgSO4. 7H2O D.…
Which of the following is used widely in the manufacture of flavours and perfumes?
Which of the following is used widely in the manufacture of flavours and perfumes? A. Alkanoates B. Alkanones…
Which of the substance lettered P to V in the equation below would be left…
Which of the substance lettered P to V in the equation below would be left on the filter…
When chlorine is added to slaked lime, the product obtained is
When chlorine is added to slaked lime, the product obtained is A. bleaching powder B. chlorinated water C.…
The by-product of the fermentation of sugar to ethanol is
The by-product of the fermentation of sugar to ethanol is A. propane -1,2,3-triol B. ethyl ethanoate C. ethanedioc…
Alkanes react with the halogens mainly by
Alkanes react with the halogens mainly by A. oxidation B. polymerization C. addition D. reduction E. substitution Correct…