InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is coloured ?A. `NO`B. `N_2 O`C. `NO_2`D. `NH_3` |
| Answer» Correct Answer - C | |
| 2. |
The three electron bond is present in the structure ofA. `N_2 O`B. `NO`C. `N_2 O_3`D. `N_2 O_5` |
| Answer» Correct Answer - B | |
| 3. |
Anomalous behaviour of nitrogen is due to.A. Small size and high `EN`B. Non-ability of d-orbitals in valence shellC. Ease of multiple bond formationD. All |
| Answer» Correct Answer - D | |
| 4. |
Boiling/melting points of the following hydrides follow in order.A. `SbH_3 gt AsH_3 gt PH_3 lt NH_3`B. `SbH_3 gt AsH_3 gt PH_3 gt NH_3`C. `SbH_3 gt AsH_3 lt PH_3 lt NH_3`D. `SbH_3 lt AsH_3 lt PH_3 lt NH_3` |
| Answer» Correct Answer - A | |
| 5. |
Ammonia is.A. Lewis baseB. Polar solventC. Non-polarD. Paramagnetic |
| Answer» Correct Answer - A::B | |
| 6. |
How many unpaired electrons are present in `NO` molecule ? |
| Answer» Correct Answer - `(1)` | |
| 7. |
How many `N-O (sigma)` bonds are present in `N_2 O_5` ? |
| Answer» Correct Answer - `(6)` | |
| 8. |
How many hydrogen bonds are formed by each `H_3 PO_4` molecule ? |
| Answer» Correct Answer - `(4)` | |
| 9. |
Bonds present in `N_2 O_5` are.A. CovalentB. CoordinateC. IonicD. Metallic |
| Answer» Correct Answer - A::B | |
| 10. |
The nitrogen oxide (s) that contain (s) `N-N` bonds (s) is (are).A. `N_2 O`B. `N_2 O_3`C. `N_2 O_4`D. `N_2 O_5` |
| Answer» Correct Answer - A::B::C | |
| 11. |
Which of the following form oxychiorides as precipitate on hydrolysis ?A. `BiCl_3`B. `SbCl_3`C. `C Cl_4`D. `PbCl_2` |
| Answer» Correct Answer - A::B | |
| 12. |
Which is strongest baseA. `NH_3`B. `PH_3`C. `AsH_3`D. `SbH_3` |
| Answer» Correct Answer - A | |
| 13. |
How many electrons are present in the valence shell of `P` in `PCl_3` ? |
| Answer» Correct Answer - `(8)` | |
| 14. |
Which of the elements show allotropy ?A. BB. PC. AsD. Bi |
| Answer» Correct Answer - B::C | |
| 15. |
Phosphorous is usually extracted fromA. PhosphoriteB. ApatiteC. ChlorapatiteD. Triphylite |
| Answer» Correct Answer - A | |
| 16. |
` PCl_5` exists but ` NCl_5` does not because :A. `NCl_5` is unstableB. Nitrogen has no vacant orbitalsC. Nitrogen atom is much smallerD. Nitrogen is highly inert |
| Answer» Correct Answer - B | |
| 17. |
`PCl_3, P_4 O_6` and `P_4 O_10, PCl_5` on hydrolysis gives respectivey.A. `H_3PO_3` and `H_3 PO_4`B. `H_3 PO_4` and `H_3PO_3`C. `(HPO_3)_n` and `H_4 P_2 O_7`D. `H_4 P_2 O_7` and `(HPO_3)_n` |
| Answer» Correct Answer - A | |
| 18. |
`N_2` forms `NCl_3` whereas `P` can form both `PCl_3` and `PCl_5`. Why ?A. `P` has d-orbitals which can be used for bonding but `N` does not have.B. `N` atom is larger than `P` in sizeC. `P` is more reactive towards `Cl` than `N`D. None of the above |
| Answer» Correct Answer - A | |
| 19. |
The pronounced change from non-metallic behaviour and also increase in the basicity of oxides from nitrogen to bismuth in group `15` is principally due to incresing size of the atoms. The ionisation potential of nitrogen is very high on account of its small size. However, ionisation potential decreases regularly on descending the group. Which one of the following is a strongest base ?A. `PH_3`B. `SbH_3`C. `AsH_3`D. `NH_3` |
| Answer» Correct Answer - D | |
| 20. |
It is recommended that ammonia bottles be opened after cooling in ice for sometime. This is becauseA. It brings tears to eyesB. It has high vapour pressureC. It is corrosive liquidD. It is mild explosive |
| Answer» Correct Answer - B | |
| 21. |
Ammonia is not usedA. In anaesthesiaB. In medicineC. In cold storagesD. For preparation of artificial silk |
| Answer» Correct Answer - A | |
| 22. |
The most non-metallic element in group `15` is ____. |
| Answer» Correct Answer - Nitrogen | |
| 23. |
The group `15` element having maximum tendency to form multiple bond is ___ . |
| Answer» Correct Answer - Nitrogen | |
| 24. |
`NH_3` has got pyramidal structure. By replacement of `H` atom it forms `(CH_3)_3 N` and `(SiH_3)_3 N` molecules which are found to have different geometries. Which of the following has highest basic character ?A. `NH_3`B. `(CH_3)_2 NH`C. `(CH_3)_3 N`D. `(SiH_3)_3 N` |
| Answer» Correct Answer - B | |
| 25. |
The following are some statements related to group `15` hydrides. (i) Reducing property increases from `NH_3` to `BiH_3` (ii) Tendency to donate lone pair decreases from `NH_3` to `BiH_3` (iii) Thermal stability of hydrides decreases from `NH_3` to `BiH_3` (iv) Bond angle decreases from `NH_3` to `BiH_3`.A. `(i), (ii), (iii)` and `(iv)`B. `(i), (iii)` and `(iv)`C. `(i), (ii)` and `(iv)`D. `(i)` and `(iv)` |
| Answer» Correct Answer - A | |
| 26. |
Ammonia acts as a Lewis base due to the presence of lone pair of electrons on N-atom. |
| Answer» Correct Answer - T | |
| 27. |
`NO_2` is a mixed anhydride. |
| Answer» Correct Answer - T | |
| 28. |
`PCl_5` behaves as a Lewis acid. |
| Answer» Correct Answer - T | |
| 29. |
Phosphorous does not show oxidation state of `+ 4`. |
| Answer» Correct Answer - T | |
| 30. |
The basicity of phosphoric acid is _____ . |
| Answer» Correct Answer - Three | |
| 31. |
`PH_3` is less basic than `NH_3`. |
| Answer» Correct Answer - T | |
| 32. |
The number of hydroxyl groups in pyrophosphric acid is _____ . |
| Answer» Correct Answer - Four | |
| 33. |
Ammonia has much higher boiling point than phosphine due to _____ . |
| Answer» Correct Answer - Hydrogen bonding | |
| 34. |
Phosphorous normally exhibits a covalency of _____ and ____ . |
| Answer» Correct Answer - `3, 5` | |
| 35. |
The most metallic element group `15` is _____ . |
| Answer» Correct Answer - Bismuth | |
| 36. |
Aqueous solution of ammonia consists of |
| Answer» Correct Answer - `NH_4^(oplus), OH^(Ө)` | |
| 37. |
`CAN` is hygroscope so its pellets are coated with calcuin silicate so as to product with calcium silicate so as to product from mixture. |
| Answer» Correct Answer - T | |
| 38. |
`NH_3` is a Lewis base and is used for cooling in refrigeration is dried over quick lime has higher melting and boiling points as compared to other hydrides of the group due to.A. Coordinate bondB. Hydrogen bondingC. Strong ionic bondingD. All |
| Answer» Correct Answer - B | |