Class - IX
Subject : Chemistry (Objective)
Time : 35 Minutes. Marks. 35
1. Which one is a matter ?
a) Temp b) Light c) Heat d) Air
2. Which one is an element ?
a) Sugar b) Common salt c) Water d) Hydrogen.
3. Which one is metal ?
a) Sulphur b) Nitrogen
c) Mercury d) Hydrogen
4. Amount of matter in a substance is called.
a) Weight b) Mass
c) Energy d) Compound
5. How many atoms are present in a molecule of S ?
a) 2 b) 3 c) 8 d) 4
6. What is the dormant valency of S in SO2?
a) 2 b) 4 c) 6 d) 0
7. Which one shows variable valency ?
a) Zinc b) phosphorus
c) Aluminium d) Sodium
8. What is the percentage of oxygen in water?
a) 18% b) 11.1%
c) 88.9% d) 89.89%
9. What is the valency of P in PCl5 ?
a) 2 b) 3 c) 4 d) 5
10. What is the valency of Fe in Ferrous chloride ?
a) 2 b) 4 c) 1 d) 3
11. Which one has the same empirical and molecular formula.
a) NH3 b) C2H6
c) C6H6 d) C2H2
12. 27 Al 3+ has __
13
a) 14 neutrons b) 13 electrons
c) 10 protons d) 27 atomic number
13. The electronic configuration of Ca (20) is.
a) 2,8,8,2 b) 2,8,2,8
c) 2,8,8 d) 2,2,8,8
14. A compound has H=1.6%, 0=76.16% and N=22.23%. Find out the simplest formula of the compound.
a) HNO3 b) H2N2O2
c) HNO d) HNO2
15. The valency of Zinc is.
a) 2 b) 3 c) 4 d) 1
16. NaCl is
a) ionic compound b) covalent compound
c) co-ordinated compound d)gaseous compound
17. The formula of phosphorus is.
a) P4 b) P3 c) P d) P5
18. The structural formula of hydrogen cyanide is
a) H = C = N b) H=C=N
c) H-C= N d) H-C=N
19. What is the valency of chlorine in HClO4 ?
a) 3 b) 1 c) 5 d) 7
20. In which compound sulphur has not 6 valency ?
a) H2SO3 b) H2SO4
c) Na2SO4 d) SO3
21. Which is the formula of magnesium nitride
a) Mg3N4 b) Mg4N3
c) Mg3N2 d) MgN2
22. How many electrons can reside in 3rd shell of an atom ?
a) 20 b) 18 c) 32 d) 50
23. Who told that the charged particle will continuously cmit energy when it is moving in a circular path.
a) Rutherford b) Neils Bohr
c) Maxwell d) Chadwich
24. Who gave the idea of the origin of spectral lines ?
a) Maxwell b) Newton
c) Rutherford d) Bohr
25. Which one is same for the two isotope ?
a) Proton b) Electron
c) neutron d) none.
26. Which one of following atom gives electrons ?
a) Na b) Cl c) Ne d) Ar
27. What is the electronic configuration of phosphorus ?
a) 2,8,2 b) 2,8,5
c) 2,8,4 d) 2,8,8
28. Which one is not an ionic compound ?
a) Ca Cl2 b) MgO
c) Na Cl d) CO2
29. 2,8,9 is the electronic configuration of which atom ?
a) Sodium b) Chlorine
c) Fluorine d) Argon
30. The charge of an electron is,
a) -1.66X1024 coulomb
b) -1.60X10-19 coulomb
c) -1.06X1019 coulmb
d) -6.10X10-19 coulomb.
31. The formula of ferric sulphate is.
a) Fe2 (SO4)3 b) Fe(SO4)3
c) FeSO4 d) Fe3(SO4)2
32. The formula of aluminium phosphate.
a) Al2(PO4)3 b) Fe (SO4)3
c) AL3(PO4)2 d) Al(PO4)3.
33. Mass number =
a) Protons + electrons b) Protons + neutrons
c) Protons + neutrons d) neutrons only.
34. 
has
has a) 1 electron b) 2 electrons
c) 3 electrons d) 4 electrons
35. What is the atomic number of Mg ?
a) 14 b) 13 c) 12 d) 10
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