Basic Concepts Set 2 - ilmijazeera

Results

#1. One calorie is equal to

4.184 J

41.84 J

0.4184 J

0.04184 J

#2. The number of moles of CO2 which contains 8.0 gm of oxygen

#3. 27 grams of Al will react completely with how much mass of O2 to produce Al2O3

8 gm of oxygen

16 gm of oxygen

32 gm of oxygen

24 gm of oxygen

#4. Mole of SO2 contains

6.02 x 1023 atoms of oxygen

18.1 x 1023 molecules of SO2

6.023 x 1023 atom of sulphur

4 gram of SO2

#5. The largest number of molecules are presenting

3.6 gram of H2O

4.8 gram of C2H5OH

2.8 gm of CO

5.4 gm of N2O5

#6. The mass of one mole of electron is

1.008 mg

0.184 mg

1.673 mg

0.55 mg

#7. Isotopes differ in

properties which depend on mass

arrangements of electrons in orbital

chemical properties

the extent to which they may be affected in electromagnetic field

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

224 dm3

22.4 dm3

1.12 dm3

112 cm3

#9. Many elements have fractional atomic mass. This is because

the mass atom is itself fractional

atomic masses are average masses of isobars

atomic masses are averages masses of isotopes

atomic masses are average masses of isotopes proportional to relative abundance

#10. A limiting reactant is one which

is taken in lesser quantity in grams as compared to other reactants

is taken in lesser quantity in volume as compared to the other

gives the maximum amount of the product which is required

gives the minimum amount of the product under consideration

Finish