Group -15 Elements p block nitrogen family quiz 25 Q

Group 15 Elements Quiz

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Test your knowledge on the p-block elements of Group 15 for JEE and NEET.

1. The general electronic configuration of Group 15 elements is:

• $ns^2 np^1$
• $ns^2 np^3$
• $ns^2 np^5$
• $ns^2 np^6$

2. Which of the following elements of Group 15 is a metalloid?

• Nitrogen (N)
• Phosphorus (P)
• Arsenic (As)
• Bismuth (Bi)

3. The highest oxidation state shown by Group 15 elements is:

• +3
• +5
• +7
• +4

4. Which of the following hydrides of Group 15 is the strongest reducing agent?

• $NH_3$
• $PH_3$
• $AsH_3$
• $BiH_3$

5. The boiling point of $NH_3$ is higher than $PH_3$ due to:

• Larger molecular mass
• Hydrogen bonding
• Dipole-dipole interactions
• Higher bond dissociation enthalpy

6. Which of the following is the most basic hydride of Group 15?

• $NH_3$
• $PH_3$
• $AsH_3$
• $BiH_3$

7. The correct order of thermal stability of Group 15 hydrides is:

• $NH_3 > PH_3 > AsH_3 > SbH_3 > BiH_3$
• $BiH_3 > SbH_3 > AsH_3 > PH_3 > NH_3$
• $PH_3 > NH_3 > AsH_3 > SbH_3 > BiH_3$
• $NH_3 > BiH_3 > PH_3 > AsH_3 > SbH_3$

8. Nitrogen is relatively unreactive at room temperature because:

• It has a high bond dissociation enthalpy.
• It is a diatomic gas.
• It has a small size.
• It is electronegative.

9. The phenomenon of allotropy is shown by which of the following Group 15 elements?

• Nitrogen only
• Phosphorus and Arsenic
• All elements except Nitrogen
• All Group 15 elements

10. The correct order of decreasing covalent radii for Group 15 elements is:

• N < P < As < Sb < Bi
• Bi > Sb > As > P > N
• N > P > As > Sb > Bi
• N > P > Sb > As > Bi

11. Which of the following is the most acidic oxide of Group 15?

• $N_2O_5$
• $P_4O_{10}$
• $As_2O_5$
• $Sb_2O_5$

12. Why does Nitrogen not form $NCl_5$?

• Nitrogen is highly electronegative.
• It has a stable electronic configuration.
• Absence of d-orbitals in its valence shell.
• High ionization enthalpy.

13. The catenation property is most pronounced in which Group 15 element?

• Nitrogen
• Phosphorus
• Arsenic
• Antimony

14. Which of the following is a neutral oxide?

• $NO_2$
• $N_2O$
• $P_4O_6$
• $As_4O_6$

15. What is the hybridization of the central atom in $PCl_5$?

• $sp^3$
• $sp^3d$
• $sp^3d^2$
• $sp^2$

16. The bond angle in $NH_3$ is:

• $109.5^\circ$
• $120^\circ$
• $107^\circ$
• $90^\circ$

17. Which of the following is a disproportionation reaction?

• $2NO_2 + H_2O \rightarrow HNO_2 + HNO_3$
• $N_2 + 3H_2 \rightarrow 2NH_3$
• $4NH_3 + 5O_2 \rightarrow 4NO + 6H_2O$
• $CaCO_3 \rightarrow CaO + CO_2$

18. The correct order of decreasing acidic strength of the oxides of Group 15 elements is:

• $N_2O_5 > P_4O_{10} > As_2O_5 > Sb_2O_5 > Bi_2O_5$
• $Bi_2O_5 > Sb_2O_5 > As_2O_5 > P_4O_{10} > N_2O_5$
• $N_2O_5 > Bi_2O_5 > P_4O_{10} > As_2O_5 > Sb_2O_5$
• $P_4O_{10} > N_2O_5 > As_2O_5 > Sb_2O_5 > Bi_2O_5$

19. Which of the following is a trihalide that is stable in all states?

• $NCl_3$
• $PCl_3$
• $AsF_3$
• $BiCl_3$

20. Which of the following acids of phosphorus is a reducing agent?

• Orthophosphoric acid ($H_3PO_4$)
• Pyrophosphoric acid ($H_4P_2O_7$)
• Phosphorous acid ($H_3PO_3$)
• Metaphosphoric acid ($HPO_3$)

21. The oxidation state of N in $HNO_3$ is:

• +5
• +3
• +1
• -3

22. Which of the following is an allotrope of phosphorus?

• White phosphorus
• Red phosphorus
• Black phosphorus
• All of the above

23. The Haber process is used for the industrial preparation of:

• Nitric acid
• Ammonia
• Sulphuric acid
• Phosphoric acid

24. What is the formula of nitric oxide?

• $N_2O$
• $NO$
• $NO_2$
• $N_2O_5$

25. The correct order of decreasing metallic character of Group 15 elements is:

• N > P > As > Sb > Bi
• Bi > Sb > As > P > N
• N < P < As < Sb < Bi
• As > Sb > N > P > Bi

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