Question

1. 1/12 of the gram atom of carbon
(A) contains 1 atom of carbon
(B) contains the same number of carbon atoms as are present in 2.5 grams of glucose (C6H1206)
(C) contains Avogardo number of carbon atoms
(D) corresponds to a.m.u.


2. The number of moles in 0.64 g of SO2 is:
(A) 100
(B) 10
(D) 0.01
(C) 0.1


3. The mass of an atom of carbon is :
(A) 1 g
(B) 1/12 g
(C) 1.99 x 10-23 g
(D) 1.99 x 1023 g


4. Which of the following weighs the least?
(A) 2 gram atoms of N
(B) 3 x 1023 atoms of C
(C) 20 g of CO2
(D) 1 mole of SO2


5. 1 mol of methane (CH) contains
(A) 6.02 x 1023 atoms of H
(B) 4 gm atoms of hydrogen
(C) 1.81 x 1023 molecules of methane
(D) 3.0 g of carbon


6. The number of O3 molecules in 16 g of ozone is approximately.
(A) 2 x 1023
(B) 3 x 1023
(C) 4 x 1023
(D) 6 x 1023


7. The total number of atoms present in 0.1 mole of sucrose (C12H22011) is :
(A) 6.02 x 1022
(B) 2.7 x 1024
(C) 6.02 x 1024
(D) 2.7 x 1025


8. The number of gram atoms of oxygen present in 0.25 g mole of (COOH)2 2H₂O is :
(A) 0.1
(B) 0.50
(C) 1.0
(D) 1.5



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Answer 1

Explanation:

sorry I don't know sorry

Answer 2

1. a
2. b
3. a
4. c
5. d
6. d
7. a
8. b

hope it helps you