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- The element is essential for the growth of plants. a) Suggest any tw...
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- a) It is said that lightning is a blessing for plants. What could be t...
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- Find the gases for which the following statements are related: a) Bur...
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- Given below are certain uses of chlorine, oxygen, nitrogen and hydroge...
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- Classify the following reactions into combination,displacement,decom...
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- Excess use of C.F.C causes depletion of ozone layer. a) What is C.F....
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- Find the relation and fill in the blanks: Combustion gas: Hydrogen C...
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- Which element found more in stratosphere.
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- …...............gas is fomed by the combination of oxygen and nitrogen...
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- The main compound of hydrogen is …..................
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- Which substance is used for purifying drinking water in ponds and wel...
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- Write two examples for double decomposition reaction.
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- "Hydrogen as the fuel of the future" this is the heading of once scien...
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- Zinc reacts with dilute hydrochloric acid to produce hydrogen gas. a...
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- Hydrogen is a fuel to no enevirnmental pollution. a) Which are the p...
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- Some potassium permaganate taken in a test tube and heat it. Insert a ...
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- Take 5mL of diltute hydrochloric acid ina test tube and add zinc granu...
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- A graphic showing the calorific value of fuels is given below: a) Wh...
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- Some chemicals available are given below. (NaCl, conc. HCl, KMnO4, K...
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- Oxygen is essential for life on earth. a) How is oxygen prepared in ...
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