1. : The least stable is __________
(A) Anti conformation
(B) Gauche conformation
(C) Eclipsed conformation
(D) Staggered conformation
2. : The potential energy always remains the same during the rotation about the carbon-carbon of the n-butane.
(A) True
(B) False
(C) None of these
Answer: (B) False
3. : In the gauche conformations, what are the methyl groups?
(A) 90° apart
(B) 60° apart
(C) 180° apart
(D) 360° apart
4. : Conductivity is defined as the ability to carry which of the following?
(A) Current
(B) Voltage
(C) Resistance
(D) All of the mentioned
5. : The cell constant is defined as the ratio of which of the following?
(A) Area of either electrodes to the length between the electrodes
(B) Length between the electrodes to the area of either electrode
(C) Length between the electrodes to the volume of either electrode
(D) Resistivity to conductivity
6. : Which of the following is the reciprocal of conductivity?
(A) Turbidity
(B) Viscosity
(C) Resistivity
(D) None of the mentioned
7. : The factor at which the conductance of electrolytic solutions depends upon is ____________
(A) Number of charge carriers
(B) All of the mentioned
(C) Dielectric constant of the solvent
(D) Temperature and pressure
8. : What is the energy that is required to rotate the n-butane molecule about the carbon-carbon bond called?
(A) Torsional energy
(B) Rotational energy
(C) Enantiomeric energy
(D) Potential energy
9. : The conformations are different arrangements of atoms that can be converted into one another by rotation about which of the following?
(A) Covalent bond
(B) Triple bond
(C) Single bond
(D) Double bond
10. : On the dilution, what is the specific conductance?
(A) Increases
(B) Remains same
(C) Decreases
(D) None of the mentioned
11. : A specific conductivity reagent is ___________
(A) NaCl
(B) KCl
(C) HCl
(D) MgCl₂
12. : Which of the following is the internationally recommended unit for conductance?
(A) Dyne
(B) Siemens
(C) Ohm
(D) Poise
13. : Which of the following is the correct order of molar ionic conductivities of the following ions?
(A) Li⁺ < Na⁺ < Rb⁺ < K⁺
(B) Li⁺ < K⁺ < Rb⁺ < Na⁺
(C) Li⁺ < Rb⁺ < Na⁺ < K⁺
(D) Li⁺ < Na⁺ < K⁺ < Rb⁺
14. : What are the infinity of intermediate conformations called?
(A) Staggered conformations
(B) Skew conformations
(C) Eclipsed conformations
(D) Gauche
15. : The relative instability of any of the intermediate skew conformations is because of which of the following?
(A) Torsional strain
(B) Shear strain
(C) Longitudinal strain
(D) Lateral strain
16. : What is the equivalent conductance of 0.1 H₂SO₄ offering a resistance of 50 ohms when placed in a conductivity cell whose electrodes are 1 cm apart with a cross-sectional area of 2 cm² at 25°C?
(A) 100 S cm² eq⁻¹
(B) 1000 S cm² eq⁻¹
(C) 100 S cm² eq⁻¹
(D) 1 S cm² eq⁻¹
17. : What does the dilution mean?
(A) An increase in the amount of Electrolyte
(B) An increase in the amount of Solute
(C) An increase in the amount of Solvent
(D) All of the mentioned
18. : The rotation about the (C2 – C3) carbon-carbon bond of n-butane requires how much energy?
(A) 50 kJ/mol
(B) 100 kJ/mol
(C) 3 kJ/mol
(D) 10 kJ/mol
19. : The potential energy of n-butane is minimum for which of the following?
(A) Skew conformations
(B) Eclipsed conformations
(C) Staggered conformations
(D) Gauche
20. : The potential energy of n-butane is maximum for which of the following?
(A) Staggered conformations
(B) Skew conformations
(C) Gauche
(D) Eclipsed conformations
21. : The gauche conformation is less stable because of which of the following?
(A) Vander Waal’s repulsion
(B) Covalent bonding
(C) Hydrogen bonding
(D) Torsional strain