Class - IX
Subject : Chemistry
(Objective) Model Question
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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