Chemistry free online test

MARAN ACADEMY

Quiz

  

 

1. Ethane shows
   1.   n→π* transition
   2.   π→ π* transition
   3.   σ→ σ* transition
   4.   n→ σ* transition
2. . ---------Transition requires less energy
   1.   n→π*
   2.   π→ π*
   3.   σ→ σ*
   4.   n→ σ*
3. The electronic transition which require maximum energy is
   1.   n→π*
   2.   π→ π*
   3.   σ→ σ*
   4.   n→ σ*
4. Migration of ϒ-hydrogen atom followed by the cleavage of β-bond is known as
   1.   β-ϒ-rearrangement
   2.   β—rearrangement
   3.   Mc-lafferty –rearrangement
   4.   Retro-Diels Alder reaction
5. .
   The characteristic IR Absorption band for an amide carbonyl would be around ------- cm-1
   
   1.   1705
   2.   1680
   3.   1720
   4.   2200
6. The only electronic transitions possible in alkanes
   1.   n→π*
   2.   π→ π*
   3.   σ→ σ*
   4.   n→ σ*
7. Molecular ion peak appears at this m/e value for 2-butanol
   1.   73
   2.   45
   3.   59
   4.   74
8. Bathochromic shifting of absorption to
   1.   Higher wave number
   2.   Lower wave number
   3.   Lower wave length
   4.   Higher wave length
9. In the mass spectrum of 2-pentene, m/e peak corresponding to 41 may be
   1.   [CH2-CH=CH-CH2]+
   2.   [CH3-CH2]+
   3.   [CH2=CH]+
   4.   [CH3-CH=CH]+
10. .
    In spectroscopy cm-1 is also known as
    1.   Candela
    2.   kayser
    3.   lux
    4.   lumen
11. In which of the following region NMR spectra are obtained?
    1.   Microwave
    2.   Radio wave
    3.   Infrared
    4.   UV-Visible
12. .the spin value of 19 F is
    
    1.   3/2
    2.   zero
    3.   1/2
    4.   1
13. The number of nmr signals for the compound CH3-CH2-O-CH2CH3 is
    1.   2
    2.   3
    3.   4
    4.   1
14. Which of the following atom doesnot exhibit NMR Spectrum
    1.   13C
    2.   12C
    3.   19F
    4.   1H
15. The spin value of 2D is
    1.   ZERO
    2.   1
    3.   3/2
    4.   1/2
16. .
    Benzene in 1H- NMR spectroscopy gives
    
    1.   2
    2.   1
    3.   3
    4.   4
17. .
    The number of signals in NMR Spectrum of impure ethanol
    1.   1
    2.   2
    3.   3
    4.   ZERO
18. The chemical shift in PPM of the CH2 group 13C NMR for Cyclobutane
    1.   -3.5
    2.   22.4
    3.   25.6
    4.   3.5
19. Which one of the following Nuclei does not give NMR Spectrum?
    
    1.   2H
    2.   14N
    3.   17F
    4.   12C
20. Identify the how many types of proton environments in CH3-CHCl-CH3
    1.   2
    2.   1
    3.   3
    4.   4
21. . The Combination of Circular dichroism and circular birefringence is known as
    1.   ORD
    2.   CD
    3.   Cotton effect
    4.   plain Curve
22. The most polar solvent among the following
    1.   benzene
    2.   methanol
    3.   ethylacetate
    4.   acetone
23. The plain curve was named by
    1.   Eliel
    2.   cotten
    3.   Djerassi
    4.   Drude
24. Chromatography is
    1.   A technique used for the separation of mixture
    2.   used for the purification of solids
    3.   used for the purification of liquids
    4.   both(A (b) and (c)
25. The stationary phase in GLC is
    1.   liquid or solid
    2.   liquid only
    3.   gas or solid
    4.   gas only
26. Which of the following is partition chromatography?
    1.   Column
    2.   TLC
    3.   GLC
    4.   Paper
27. Which of the following is not an adsorbent?
    1.   Alumina
    2.   Activated Charcoal
    3.   Calcium carbonate
    4.   Calcium chloride
28. For predicting the sign of cotton effect in ORD the ----------------is used
    1.   nitrogen rule
    2.   haloketone rule
    3.   octant rule
    4.   none
29. An increase in the number of theoretical plates improves the
    
    1.   efficiency
    2.   resolution
    3.   both (a) and (b)
    4.   independent
30. Ion exchange chromatography is based on the
    
    1.   Electrostatic attraction
    2.   Electrical mobility of ionic species
    3.   Adsorption chromatography
    4.   partition chromatography