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Question 1 of 30
1. Question
What happens when dilute hydrochloric acid is added to iron filling? Tick the correct answer
CorrectIncorrect -
Question 2 of 30
2. Question
Assertion: A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas.
Reason: Lead nitrate reacts with potassium iodide to form yellow ppt of lead iodide and the reaction is double displacement as well as precipitation reaction.CorrectIncorrect -
Question 3 of 30
3. Question
The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of
CorrectIncorrect -
Question 4 of 30
4. Question
The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called:
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Question 5 of 30
5. Question
The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of
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Question 6 of 30
6. Question
Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is:
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Question 7 of 30
7. Question
What type of chemical reactions take place when electricity is passed through water?
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Question 8 of 30
8. Question
Which of the following is an endothermic process?
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Question 9 of 30
9. Question
Oxidation is a process which involves
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Question 10 of 30
10. Question
Give the ratio in which hydrogen and oxygen are present in water by volume.
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Question 11 of 30
11. Question
A substance which oxidizes itself and reduces other is known as
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Question 12 of 30
12. Question
In an electrolytic cell where electrolysis is carried, anode has:
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Question 13 of 30
13. Question
Which of the following reactions is not correct:
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Question 14 of 30
14. Question
Copper displaces which of the following metals from its salt solution:
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Question 15 of 30
15. Question
Which of the following involves combination of two elements?
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Question 16 of 30
16. Question
Some crystals of copper sulphate were dissolved in water. The colour of the solution obtained would be:
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Question 17 of 30
17. Question
When dilute HCl is added to zinc pieces taken in a test tube
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Question 18 of 30
18. Question
Magnesium ribbon is rubbed before burning because it has a coating of:
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Question 19 of 30
19. Question
Which one of the following processes involve chemical reactions?
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Question 20 of 30
20. Question
Assertion: Zinc reacts with sulphuric acid to form zinc sulphate and hydrogen gas and it is displacement reaction.
Reason: Zinc reacts with oxygen to form zinc oxide.CorrectIncorrect -
Question 21 of 30
21. Question
Assertion: MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O is redox reaction.Reason: MnO2 oxides HCl to Cl2 and gets reduced to MnCl.
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Question 22 of 30
22. Question
Assertion: Magnesium ribbon keeps on burning in atmosphere of nitrogen.
Reason: Magnesium reacts with nitrogen to form magnesium nitrides and this reaction is combination reaction.CorrectIncorrect -
Question 23 of 30
23. Question
Heat is evolved during:
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Question 24 of 30
24. Question
Dissolving suger is an example of
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Question 25 of 30
25. Question
A substance added to food containing fats and oils is called:
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Question 26 of 30
26. Question
Select the oxidising agent for the following reaction:
H2S + I2 > 2HI + SCorrectIncorrect -
Question 27 of 30
27. Question
A substance ‘X’ is used in white-washing and is obtained by heating limestone in the absence of air. Identify ‘X’.
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Question 28 of 30
28. Question
The process of reduction involves
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Question 29 of 30
29. Question
Which of the following gases can be used for storage
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Question 30 of 30
30. Question
Pb + CuCl2 → PbCl2 + Cu
This reaction is an example of:CorrectIncorrect