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If an atom of an element has twice the m...

If an atom of an element has twice the mass of C-12 , then its atomic mass will be nearly

A

12 u

B

24 u

C

36 u

D

48 u

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-SOME BASIC CONCEPTS OF CHEMISTRY -ASSIGNMENT SECTION A (Objective Type Questions (One option is correct))
  1. Carbon and oxygen react in ratio 3 : 8 by mass to form CO(2) . What we...

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  2. Molecular mass of C(3) H(7) OH is

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  3. If an atom of an element has twice the mass of C-12 , then its atomic ...

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  4. Formula unit mass of K(2) CO(3) is (Atomic mass of K = 39 u , C = 1...

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  5. The number of moles of nitrogen atom in 56 g nitrogen is

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  6. The number of mole of N - atom in 18.066 x 10 ^(23) nitrogen atoms is

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  7. The number of particles presents in 1 mol of nitrogen atom are

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  8. Molality is expressed in units of

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  9. Which of the following is correct ?

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  10. What weight in grams is represented by 1.5 moles of sulphur dioxide ?

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  11. The number of atoms in 20 g of SO(3) is approximately

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  12. A solution is prepared by dissolving 10 g of KOH in 100 ml of solution...

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  13. How many grams of NaOH are present in 250 mL of 0.5 M NaOH solution ?

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  14. Calculate the molality of solution containing 3 g glucose dissolved in...

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  15. Which of the following methods of expressing concentration varies with...

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  16. Which of the following is incorrect according to Dalton's atomic theor...

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  17. What is the molarity of NaOH solution if 250 mL of it contains 1 mg of...

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  18. The percentage of nitrogen in HNO(3) is

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  19. The precentage composition of calcium , carbon and oxygen in C(a) CO(3...

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  20. The correct relationship between molecular mass (M) and vapour (VD) is

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