ANKUR CLASS TEST
Chapter1: Chemical Reactions and reactions
Time : 20min
Marks:10
1. What happens when dilute hydrochloric acid is added to iron fillings?
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2. Write the chemical equation for the reaction that takes place when lead nitrate and
potassium iodide solutions are mixed.
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3. Write the balanced chemical equation: Pb(NO3 )2 → PbO + NO2 + O2
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4. Write one equation each for decomposition reaction where energy is supplied in the
form of heat, light or electricity.
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5. What is the difference between displacement and double displacement reaction?
Write the equations for these reactions.
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6. Study the given diagram and answer the following questions:
(a) Write the chemical reaction involved in the process.
(b) Mention the color of:
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copper powder and
the substance formed after heating it.
7. Identify the type of reaction following reactions, also write balance chemical
equation for each.
a) The reaction mixture becomes warm.
b) An insoluble substance is formed
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