Question
Bauxite is the principal ore used in the commercial extraction of aluminium
Bauxite is the principal ore used in the commercial extraction of aluminium. The Bayer’s process is used to refine bauxite into pure…
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Question
Carbon reacts with an acid to form carbon dioxide, water and nitrogen dioxide
Carbon reacts with an acid to form carbon dioxide, water and nitrogen dioxide. (a) Name the acid used in the reaction. (b)…
Question
32.5 g of zinc reacts with concentrated nitric acid as given in the equation
Zn + 4HNO3 ⟶ Zn(NO3)2 + 2H2O + 2NO2 32.5 g of zinc reacts with concentrated nitric acid as given in the…
Question
Anil is a laboratory assistant in a college. He prepared nitric acid but stored it in a transparent container exposed to sunlight
Anil is a laboratory assistant in a college. He prepared nitric acid but stored it in a transparent container exposed to sunlight.…
Question
State whether the following statements are True or False
State whether the following statements are True or False: (a) Organic compounds having different molecular formula, but same structural formula are called…
Question
Give reasons why
Give reasons why: (a) Hydrochloric acid cannot form an acid salt. (b) Electronegativity increases across a period.
Question
The diagram given below shows the electroplating of a spoon with silver
The diagram given below shows the electroplating of a spoon with silver. With reference to the diagram, answer the following questions: (a)…
Question
During the manufacture of sulphuric acid, a chemist collected the gas formed after catalytic oxidation of sulphur dioxide
During the manufacture of sulphuric acid, a chemist collected the gas formed after catalytic oxidation of sulphur dioxide. (a) Name the gas…
Question
An unsaturated hydrocarbon having two carbon atoms was made to react with two moles of hydrogen gas
An unsaturated hydrocarbon having two carbon atoms was made to react with two moles of hydrogen gas in the presence of a…
Question
Using suitable chemicals from the box, write balanced chemical equations for the preparation of the following salts
Given below are some chemicals. Lead nitrate, Copper, Hydrochloric acid, Lead oxide, Iron, Sodium carbonate, Copper carbonate, Chlorine Using suitable chemicals from…