B.Sc.First Year Online Practical Examination In Chemistry

17 Questions | By Sandipdautpure | Last updated: Mar 21, 2022 | Total Attempts: 113

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B.Sc.First Year Online Practical Examination In Chemistry - Quiz

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
- A.
  
  Carboxylic Acid
- B.
  
  Phenolic OH
- C.
  
  Carbonyl Group
- D.
  
  Ketone
7.

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.
- A.
  
  True
- B.
  
  False
15.

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
- A.
  
  Orange-red
- B.
  
  Orange
- C.
  
  Blue
- D.
  
  Colourless

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