CBSE Class 10 Chemistry Worksheet - Revision (5)
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Q1. An iron salt ‘X’ on heating produces a brown coloured solid oxide
‘Y’ and releases suphur oxides. Identify X and Y. Which type of reaction
is this? Write balanced chemical equation for this reaction.
Q2. Identify the oxidizing agent and reducing agent in the following
Fe2O3 + 3CO -------> 2Fe + 3CO2
Q3. Define Rancidity? Why Potato chips should be kept in air tight
Q4. Rewrite the following chemical equation in the balanced form
NH3 + O2 -------> NO + H2O
Q5. A gas ‘X’ obtained from chlor-alkali process is used for preparing a
compound ‘Y’ which is used for disinfecting drinking water.
(1) Identify ‘X’ and ‘Y’.
(2) Write the chemical equation for preparation of ‘Y’ from ‘X’.
(3) Give uses of ‘X’ and ‘Y’
Q6.How is the concentration of the Hydroxide ion affected when the
following is added to sodium Hydroxide solution.
(a) Excess NaOH (b) distilled water
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