Class 11 Chemistry , foundation and Fundamental chapter object question.

             OBJECTIVE QUESTION

1.Which one of the following is not

pure substance?

a.diamond

b. 24 carat gold

C.air

d.ammonia

2.Non-metal that can conduct electricity in the ordinary condition is

a.phosphorus

b.graphite

C.sulphur

d.chlorine

3.From the mixture of table salt and camphor, camphor is obtained in a pure and dry state by the process

a.filtration

b.distillation

C.chromatography  

 D.Sublimation

4.An impure sample of water containing dissolved solutes can be purified by

a.filtration process

b.sedimentation process

.C.distillation process

d.non of the above

5.Battery acid is

a.H2SO3

B.H2So4

c.H2SO5

d.H2S2O7

6.Valency of an element depends upon

a.total number of electrons of an atom

B.number of electrons present in the valance shell

c.net positive charge present in the nucleus

d.all of the above

7.The liquid left after crystallization is

a.distillate

b.sublimate

C.Mother liquor

d.residue

8.Fractional crystallization is based on the difference between

a.melting point

B.solubilities

c.boiling point

d.vapour pressure

9.A mixture of liquids having their boiling points differing by only a few degrees can be separated by

a.separating funnel

b.steam distillation

C.fractional distillation

d.distillation under reduced pressure

10. The element whose symbol is derived from German language word is

a.titanium

b.tantalum

C.Tungsten

d. tin

11. Variable valency is generally shown by

a.representative elements

B.transitional elements

c. p-block elements

d.non-metals

12. Mass ratio of C and H is 3:1.The empirical formula of the compound is

a.C2H

b.CH3

с.C2H6

D.CH4

13. Molecular formula of calcium nitrite is

a.Ca3N2

b.Ca3NO2

C.C6H12O6

d. Ca(NO3)2

14. Of the following the only empirical formula is

a.CH6

b. C2H4O2

c.C6H12O6

D.C12H22O11

15. A mixture of red and blue ink can be separated by

a.distillation

b.recrystallization

C.chromatgraphy

 d. crystallization

16. The molecular formula of silver chromate is

a.Ag,CrO4

B. Ag2CrO4

c.Ag2CrO6

d.Ag2CrO7

17. Which is not a molecule?

a.O2

b.C6H12O6

c.Ne

D.H

18. The valency of Al in aluminium phosphate is 

a. 1 

b. 2

C.3

d. 4 

19. Which of the following does not exist in a liquid state? 

a. Hg

b. Ga

c. Br 

D.Na

20. The formation of urea from ammonium cyanate is 

a. synthetic reaction

b. photochemical reaction

 C. isomerization reaction

d. decomposition reaction. 

21. The process by which the moisture is removed from the substance is 

a. washing

b. atomolysis 

c. desiccation 

d. distillation 

22. When NaCl is dissolved in water. Na+ ions becomes 

a. oxidised 

b. reduced

 C.Hydrated

d. none

 23. Chromatography is a method for separation of mixtures purification of the compound is based on

 a. solubility

b. color change 

c. absorption

D. selective absorption

24. The process for the separation of copper sulphate from its aqueous solution is

 a. Filtration

Distillation

C.crystallization

D.sublimation