B.Sc.First Year Online Practical Examination In Chemistry
17 Questions
| Total Attempts: 99
.
Questions and Answers
- 1.The element which cannot be detected through Lassaigne’s test is
- A.
Sulphur
- B.
Oxygen
- C.
Nitrogen
- D.
Chlorine
- 2.The element which cannot be detected through Lassaigne’s test is
- A.
Sulphur
- B.
Oxygen
- C.
Nitrogen
- D.
Chlorine
- 3.The element which cannot be detected through Lassaigne’s test is
- A.
Sulphur
- B.
Oxygen
- C.
Nitrogen
- D.
Chlorine
- 4.The ionic compound formed during the fusion of 1,2-Dichloro benzene with sodium metal is AgCN
- A.
True
- B.
False
- 5.Functional group present in Aniline is
- 6.
![Fuctional group present in above structure are - ProProfs]( "Fuctional group present in above structure are")
Fuctional group present in above structure are- A.
Carboxylic Acid
- B.
Phenolic OH
- C.
Carbonyl Group
- D.
Ketone
- 7.
![Above Apparatus used for determination of - ProProfs]( "Above Apparatus used for determination of")
Above Apparatus used for determination of- A.
Surface tension
- B.
Melting point
- C.
Freezing point
- D.
Viscosity
- 8.The Force of friction between two layers of a liquid moving past one another with different velocities is
- A.
Surface tension
- B.
Viscosity
- C.
Density
- D.
Refractive index
- 9.Which of the following express the Unit of Viscosity
- A.
Dyne second Cm-1
- B.
Centipoise
- C.
Kg m-1 S-1
- D.
All of the above
- 10.What is the effect of temperature on Viscosity?
- A.
Decreases
- B.
Increases
- C.
Remain constant
- D.
Can not be predicted
- 11.The existence of strong intermolecular forces of attraction in liquids gives rise to important property known as--
- A.
Boiling point
- B.
Surface tension
- C.
Viscosity
- D.
Optical activity
- 12.SI unit of suface tension
- A.
Nm-1
- B.
Dynes cm-1
- C.
Both
- D.
None of these
- 13.compound parachor value Ethane 110.5 propane 150.8 Butane 190 from the data given above Parachor value of CH2 group is -----------
- 14.
![Following reaction take place during preparation of Lassaigne extract. - ProProfs]( "Following reaction take place during preparation of Lassaigne extract.")
Following reaction take place during preparation of Lassaigne extract.- A.
True
- B.
False
- 15.
![Below reaction is used in confirmation of -------- element during element detection process. - ProProfs]( "Below reaction is used in confirmation of -------- element during element detection process.")
Below reaction is used in confirmation of -------- element during element detection process.- A.
Nitrogen
- B.
Sulhur
- C.
Halogen
- D.
None of these
- 16.
![What will be the colour of final compound formed in given reaction - ProProfs]( "What will be the colour of final compound formed in given reaction")
What will be the colour of final compound formed in given reaction- A.
Orange-red
- B.
Orange
- C.
Blue
- D.
Colourless
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