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Question 1 of 30
1. Question
Which of the following correctly represents 360g of water?
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Question 2 of 30
2. Question
Which of the following statements is not true about an atom?
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Question 3 of 30
3. Question
1 u or 1 amu means
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Question 4 of 30
4. Question
Which of the following contains maximum number of molecules?
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Question 5 of 30
5. Question
A sample of NH3 molecule irrespective of source contains 82.35% Nitrogen and 17.65% of Hydrogen by mass. This data supports:
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Question 6 of 30
6. Question
An element X is divalent and another element Y is tetravalent. The compound formed by these two elements will be:
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Question 7 of 30
7. Question
The molecular formula of potassium nitrate is ________.
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Question 8 of 30
8. Question
3.42 g of sucrose are dissolved in 18 g of water in a beaker. The numbers of oxygen atoms in the solution are:
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Question 9 of 30
9. Question
Molecular mass is defined as the:
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Question 10 of 30
10. Question
A change in the physical state can be brought about
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Question 11 of 30
11. Question
The atomic mass of sodium is 23. The number of moles in 46g of sodium is ________.
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Question 12 of 30
12. Question
Which of the following represents a correct chemical formula?
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Question 13 of 30
13. Question
What is the formula mass unit of ZnO?
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Question 14 of 30
14. Question
How many atoms of oxygen are present in 300 grams of CaCO3?
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Question 15 of 30
15. Question
Which of the following represents the correct relation between Avogadro’s number (No), number of particles (N) and moles (n)?
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Question 16 of 30
16. Question
Who coined the term ‘Parmanu’ for the smallest indivisible particles?
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Question 17 of 30
17. Question
The radius of a hydrogen atom is:
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Question 18 of 30
18. Question
The most remarkable concept that Dalton’s atomic theory proposed was that of the:
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Question 19 of 30
19. Question
The atomic mass of carbon is:
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Question 20 of 30
20. Question
Compounds composed of metals and non-metals contain:
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Question 21 of 30
21. Question
The formula of ammonium sulphate is:
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Question 22 of 30
22. Question
The word “mole” was introduced around 1896 by:
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Question 23 of 30
23. Question
The chemical symbol for sodium is:
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Question 24 of 30
24. Question
Which of the following has a maximum number of atoms?
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Question 25 of 30
25. Question
Which of the following contains a maximum number of molecules?
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Question 26 of 30
26. Question
In a compound such as water, the ratio of the mass of hydrogen to the mass of oxygen is always ______
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Question 27 of 30
27. Question
Atomic radius is measured in ________
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Question 28 of 30
28. Question
The symbol of iron is Fe from its Latin name _________
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Question 29 of 30
29. Question
One atomic mass unit is a mass unit equal to exactly ________ the mass of one atom of carbon-12.
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Question 30 of 30
30. Question
The formula unit mass of a substance is a sum of the atomic ______ of all its constituent atoms.
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