class 10th chapter 1 chemistry objective question
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3marks marks questions
1.
What is combination reaction?
2.
What
is displacement reaction and its types ?
3.
What
is oxidation reaction with an examples?
4.
What
is reduction reaction and example ?
5.
What
is rancidity and rusting ?
6.
What
is Redox
One
marks objective questions
7. Some
crystals of copper Sulphate were dissolved in water .The colour of the solution
obtained would be
a.
Green
b. red c. blue d. none of these
8. When
dilute HCL is added to zinc places taken
in a test tube
a.
No change takes place
b.
The colour of the solution becomes
yellow.
c.
A pungent smelling gas librated
d.
Small bubbles of hydrogen gas appear on
the surface of zinc places
9. P5bs
reacts with ozone o3 and forms pbso4 .as per the balanced
equation ,molecules of ozone required for every one molecule of pbs is /are
a.
3
b. 0 c. 4 d. none of these
10. Copper displaces which of the following
metals from its solutions
a.
ZnSo4 b. Fe So4 c. Ag No3 d.
none of these
11. In an electrolytic cell where
electrolysis is carried ,anode has :
a.
Positive charge b. negative charge c. both d. none
12. The reaction H2+ cl2 → 2HCl
a.
Oxidation reaction
b.
Reduction reaction
c.
Decomposition reaction
d.
Combination reaction
13. In the reaction pbo +c → pb +co
a.
Pbo is oxidizing
b.
C acts as an oxidation agent
c.
C acts as a reduction agent
d.
Reaction does not represent redox
reaction
14. A substance which oxidizes itself and
reduces other is known as
a.
Oxidizing agent
b.
Reducing agent
c.
Both
d.
None of these
15. Take about 5 ml dil H CL in a test tube
and add a few pieces of granules to it . which ga is evolves ?
a.
Chlorine
b.
Hydrogen
c.
H CL
d.
Nitrogen
16. Dissolving sugar is an example of
a.
Physicals changes
b.
Chemical changes
c.
Redox reaction
d.
None of these
17. Heat is evolved diving
a.
Endothermic reaction
b.
Displacement reaction
c.
Combustion reaction
d.
Combination reaction
18. Which of the following is not a balanced
a.
Fe +cl 2 → Fe cl 2
b.
Mg + Cu SO 4 → Mg SO 4 + C 4
c.
Na o H → Na + H 2 O
d.
NONE OF THESE
19. The reaction between lead nitrate and
potassium iodide present in aqueous solution is an example of
a.
Decomposition reaction
b.
Displacement reaction
c.
Double displacement reaction
d.
Neutralization reaction
20. Chemical rust is
A. Hydrated
ferrous oxide b. hydrated ferric oxide c. only ferric oxide d. none
21. Which of the following reactions is not
correct
a.
Zn +Cu So 4 → Zn So 4 + Cu
b.
2 Ag + Cu(No 3)2 → 2 Ag No 3 + Cu
c.
Fe + Cu So 4 → Fe So 4 + Fe
d.
None of these
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