1. : With respect to one-component system, the mixture that is present at the triple point is ______.
(A) Water
(B) Ice
(C) Water, ice, vapor
(D) Water vapor
2. : What is the degree of freedom for the sublimation curve?
(A) 0
(B) 1
(C) Does not exist
(D) 2
3. : Under which of the following conditions is the one-component system converted into two-component systems?
(A) Decrease the temperature
(B) Decrease the pressure
(C) Add an immiscible liquid
(D) Add a miscible liquid
4. : In _________ ways –CH3 protons can be coupled with protons on the adjacent carbon atom relative to their external field.
(A) 1
(B) 4
(C) 3
(D) 2
5. : For the NMR spectrum, we use the carbon tetrachloride and water successfully as a solvent.
(A) False
(B) True
Answer: (B) True
6. : Which of the following is the number of phases at the sublimation curve?
(A) 4
(B) 3
(C) 2
(D) 0
7. : Under which of the following conditions is the two-component system converted into a one-component system?
(A) Decrease the temperature
(B) Add an immiscible liquid
(C) Add a miscible liquid
(D) Decrease the pressure
8. : The degree of freedom for the decomposition of potassium permanganate will be ______________.
(A) 3
(B) 1
(C) 2
(D) 0
9. : Which of the following are the number of signals in 1-propanol and in 2-propanol?
(A) 3, 4
(B) 4, 2
(C) 2, 4
(D) 4, 3
10. : _______ is inversely proportional to the chemical shifts positions.
(A) Operating frequency of the instrument
(B) Frequency of TMS
(C) Frequency of unknown group of protons
(D) All of these
11. : The horizontal arrest in a cooling system refers to _______.
(A) Continuous cooling
(B) Bivariant reaction
(C) Variant reaction
(D) Invariant reaction
12. : The degree of freedom for decomposition of charcoal will be ______.
(A) 3
(B) 2
(C) 1
(D) 0
13. : The degree of freedom for the following reaction will be _______ CH4 ⟶ CO2 (gas) + 2H2O.
(A) 4
(B) 3
(C) 2
(D) 6
14. : Which of the following is the number of different orientations which a magnetic nucleus can take?
(A) 2I
(B) 4I
(C) 2I+1
(D) 2I-1
15. : The nuclei with a spin quantum number greater than which of the following can exhibit the NMR phenomenon?
(A) 5
(B) 0
(C) 10
(D) -5
16. : Which of the following is the number of NMR signals obtained in CH3COCH3?
(A) 6
(B) 1
(C) 2
(D) 3
17. : What does the NMR spectra of the functional isomers of the molecular formula C2H6O show signals respectively?
(A) 1, 3
(B) 1, 2
(C) 1, 4
(D) 1, 5