Chemistry Questions
1. Select washing soda from the following:
(a) NaHCO3
(b) Na2CO3·5H2O
(c) Na2CO3·10H2O
(d) NaOH
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2. A metal 'X' is used in the thermite process. When X is burnt in air, it gives an amphoteric oxide 'Y'.
'X' and 'Y' are respectively:
(a) Fe and Fe2O3
(b) Al and Al2O3
(c) Fe and Fe3O4
(d) Al and Al2O4
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3. Assertion-Reason Question:
Assertion (A): The color of the aqueous solution of copper sulfate turns colorless when a piece of
lead is added to it.
Reason (R): Lead is more reactive than copper and hence displaces copper from its salt solution.
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4. In the experimental setup given below, it is observed that on passing the gas produced in the
1. Select washing soda from the following:
(a) NaHCO3
(b) Na2CO3·5H2O
(c) Na2CO3·10H2O
(d) NaOH
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2. A metal 'X' is used in the thermite process. When X is burnt in air, it gives an amphoteric oxide 'Y'.
'X' and 'Y' are respectively:
(a) Fe and Fe2O3
(b) Al and Al2O3
(c) Fe and Fe3O4
(d) Al and Al2O4
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3. Assertion-Reason Question:
Assertion (A): The color of the aqueous solution of copper sulfate turns colorless when a piece of
lead is added to it.
Reason (R): Lead is more reactive than copper and hence displaces copper from its salt solution.
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4. In the experimental setup given below, it is observed that on passing the gas produced in the
