Basic Concepts test 2

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A test from chapter 1 i.e Basic Concepts of Chemistry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. The number of moles of CO2 which contains 8.0 gm of oxygen

A) 0.25
B) 0.50
C) 1.0
D) 1.50

2. 27 grams of Al will react completely with how much mass of O2 to produce Al2O3

A) 8 gm of oxygen
B) 16 gm of oxygen
C) 32 gm of oxygen
D) 24 gm of oxygen

3. Mole of SO2 contains

A) 6.02 x 1023 atoms of oxygen
B) 18.1 x 1023 molecules of SO2
C) 6.023 x 1023 atom of sulphur
D) 4 gram of SO2

4. The largest number of molecules are presenting

A) 3.6 gram of H2O
B) 4.8 gram of C2H5OH
C) 2.8 gm of CO
D) 5.4 gms of N2O5

5. The mass of one mole of electron is

A) 1.008 mg
B) 0.184 mg
C) 1.673 mg
D) 0.55 mg

6. Isotopes differ in

A) properties which depend on mass
B) arrangements of electrons in orbital
C) chemical properties
D) the extent to which they may be affected in electromagnetic field

7. The volume occupied by 1.4 gm of N2 at STP is

A) 224 dm3
B) 22.4 dm3
C) 1.12 dm3
D) 112 cm3

8. Many elements have fractional atomic mass. This is because

A) the mass atom is itself fractional
B) atomic masses are average masses of isobars
C) atomic masses are averages masses of isotopes
D) atomic masses are average masses of isotopes proportional to relative abundance

9. A limiting reactant is one which

A) is taken in lesser quantity in grams as compared to other reactants
B) is taken in lesser quantity in volume as compared to the other
C) gives the maximum amount of the product which is required
D) gives the minimum amount of the product under consideration

10. One calorie is equal to

A) 4.184 J
B) 41.84 J
C) 0.4184 J
D) 0.04184 J