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1. DNA replication mainly takes place in (NTSE Punjab, Stage-I, 2015-16)
G1 Phase
G2 Phase
S Phase
M Phase
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2. What is the wavelength of radiation whose frequency is 2 x 1014 S-1? (Velocity of radiation is 3 x 108 mls)
1.5 x 106 m
1.8 x 10-6m
1.2 x 106 m
1.5 x 10-6 m
3. Which of the following is not the unit of the universal gas constant? (NTSE West Bengal, Stage-I, 2014-15)
erg mol -1 K -1
J mol -1 K -1
Pa m2mol -1 K -1
Pa m3mol -1 K -1
4. The equivalent conductance of NaCI at concentration C and at infinite dilution are λC and λ∝ respectively. The correct relationship between λC and λ∝ is given by (where the constant B is positive) (NTSE Bihar, Stage-I, 2014-15)
λC = λ∝ -B√C
λC = λ∝ +B√C
λC = λ∝ +BC
5. On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is (NTSE Bihar, Stage-I, 2014-15)
An alkyl cyanide
An alkyl isocyanide
An alkanol
An alkanediol
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