Polarimeter MCQ

Test your knowledge with important Polarimeter MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Polarimeter MCQs at Bissoy

• What is the specific optical rotation of (S)-malic acid at a concentration of 5.5 g/ mL in the solvent pyridine at 20°C at a wavelength of 589 nm?
  ক

  the specific rotation is –27°

  খ

  the specific rotation is +27°

  গ

  the specific rotation is –17°

  ঘ

  the specific rotation is +17°
• Which of these is a comparatively insignificant factor affecting the magnitude of specific optical rotation?
  ক

  Concentration of the substance of interest

  খ

  Purity of the sample

  গ

  Temperature of the measurement

  ঘ

  Length of the sample tube
• What can be said with certainty if a compound has α= -9.25°?
  ক

  The compound has the (S) configuration

  খ

  The compound has the (R) configuration

  গ

  The compound is not a meso form

  ঘ

  The compound possesses only one stereogenic center
• What is the percent composition of a mixture of (S)-(+)-2-butanol, α= +13.52°, and (R)-(-)-2-butanol, α = -13.52°, with a specific rotation α = +6.76°?
  ক

  75%(R) 25%(S)

  খ

  25%(R) 75%(S)

  গ

  50%(R) 50%(S)

  ঘ

  67%(R) 33%(S)
• Which of the following groups has the highest priority according to the Cahn-Ingold-Prelog sequence rules?
  ক

  CH3

  খ

  CH2Cl

  গ

  CH2OH

  ঘ

  CHO
• If a solution of a compound (30.0 g/100 mL of solution) has a measured rotation of +15° in a 2 dm tube, what is the specific rotation?
  ক

  +50°

  খ

  +25°

  গ

  +15°

  ঘ

  +7.5°
• What is the effect of the I on the specific optical rotation (α), if I gets double?
  ক

  α gets double

  খ

  α gets halved

  গ

  α gets four times

  ঘ

  α eight times
• Polarimeter works on the principle of which of the following?
  ক

  polarisation of light

  খ

  change of the electrical conductivity of solution with composition

  গ

  change of angle of refraction with composition

  ঘ

  change of electrical conductivity of solution with temperature
• A solution of 0.1 g/mL of a pure R enantiomer in a 1.0 dm (i.e., 10 cm) polarimeter rotates plane polarized light by +4.8°. What is the rotation observed on this solution in a 2 dm polarimeter?
  ক

  +2.4°

  খ

  +4.8°

  গ

  +19°

  ঘ

  +9.6°
• What does a polarimeter measure?
  ক

  Polarity of the substance

  খ

  Angle of rotation of an optical active compound

  গ

  Concentration of the substance

  ঘ

  pH of the substance