Class 9th Chemistry Chapter 1


Total Marks: 31

1. Perecntage of Argon in atmosphere is :
2.1 1.8 7.8 0.9
2. Valency of Chlorine is :
1 7 3 4
3. Valency of oxygen is ?
1 2 3 4
4. Molecular mass of H O is .
18 amu 18 g 20 g 20 amu
5. The molar mass of H SO is
98 grams 98 amu 9.8 grams 9.8 amu
6. One gram molecule of sulphuric acid is equivalent is.
96 g 97 g 98 g 99 g
7. The gram atomic mass of hydrogen is
1.008 g 2.016 g 1.008 amu 2.016 g amu
8. The branch of chemistry which deals with manufacturing of chemical compounds on commercial scale is called.
Biochemistry Organic chemistry Industrial chemistry Physical chemistry
9. Number of moles in 29.25 gram salt is .
0.75 0.5 0.21 0.25
10. In which one of the following pairs has the same number of ions?
1 mole of NaCl and 1 mole of MgCl2 1/2 mole of NaCl and 1/3 mole of MgCI2 1/2 mole of NaCl and 1/2 mole of MgCl2 1/3 mole of NaCl and 1/2 mole of MgCl2
11. Which one of the following pairs has the same mass?
1mole of CO and 1mole of N2 1mole of O2 and 1mole of N2 1mole of CO and 1mole of CO2 1mole of CO2 and 1mole of O2
12. How many number of moles are equivalent to 8 grams of CO2 ?
0.15 0.18 0.21 0.24
13. The molar mass of H2 SO4 is:
98 g 9.8 g 98 amu 9.8 amu
14. The mass of 1 molecule of water is
18 amu 18 g 18 mg 18 kg
15. Which one of the following elements is found in most abundance in the Earth\'s crust?
Oxygen Hydrogen Nitrogen Silicon
16. The third abundant gas found in Earth\'s atmosphere is
Carbon monoxide Oxygen Nitrogen Argon
17. Most of the elements exist in one of the following states:
Plasma Solid Liquid Gas
18. Which one of the following can be seperated by physical means?
Radicals Compounds Elements Mixtures
19. Industrial chemistry deals with the manufacturing of compounds:
in the laboratory on commercial scale on micro scale on economic scale
20. Number of moles of carbon in 4 gram coal is :
0.25 0.33 0.5 0.75
21. ------- number of moles are equivalent to 8 gram of CO2 ?
0.15 0.18 0.21 0.24
22. How many number of moles are equivalent to 11 gram of CO ?
0.15 0.2 0.25 0.3
23. One mole is the mass of chlorine gas .
71 g 35.5 g 44 g 32 g
24. No. of moles in 6.0 g water is .
0.65 0.50 0.33 0.25
25. How much mass is in one mole of water :
2 3 16 18
26. A monoatomic molecule is:
H2 O N 2 O2 He
27. The molecule which contain one atom are called ?
Polyatomic Heteroatomic Monoatomic Diaatomic
28. CO2 is type of molecule:
Diatomic Triatomic Non of these Monoatomic
29. ----- is formed by the combination of atoms :
Molecule Ion Radical alloy
30. The atomic number of an element is indicated by a symbol
Z A K L
31. The molar mass of nitric acid is:
63g 63mg 63amu 63kg