Given below are two statements : <t...

Hint: All the elements of group 15 can form two types of oxides: \(X_2O_3\) and \(X_2O_5\) \(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\) Explanation: (1) Yes, just as nitrogen forms ammonia (NH₃), arsenic can form arsine (AsH₃), which is the arsenic analogue of ammonia. Arsine is a colorless, highly toxic, and flammable gas with a mild garlic-like odor detectable at very low concentrations. Its molecular structure is trigonal pyramidal, similar to ammonia, with arsenic at the center bonded to three hydrogen atoms. Arsine is analogous to ammonia in structure and basic chemical behavior, but it is much more toxic and less chemically reactive as a base. (2) Antimony does form antimony pentoxide (Sb₂O₅), which is a well-known chemical compound where antimony is in the +5 oxidation state. It is used in various industrial applications, including as a flame retardant and a catalyst. It can be prepared by several chemical methods, such as the hydrolysis of antimony pentachloride or oxidation of antimony trioxide with nitric acid. So, statement I is correct, but statement II is incorrect. Hence, option 1 is the correct answer.

Group 15 Preparation Properties Uses

Q: Given below are two statements : <t...

Hint: All the elements of group 15 can form two types of oxides: \(X_2O_3\) and \(X_2O_5\) \(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\) Explanation: (1) Yes, just as nitrogen forms ammonia (NH₃), arsenic can form arsine (AsH₃), which is the arsenic analogue of ammonia. Arsine is a colorless, highly toxic, and flammable gas with a mild garlic-like odor detectable at very low concentrations. Its molecular structure is trigonal pyramidal, similar to ammonia, with arsenic at the center bonded to three hydrogen atoms. Arsine is analogous to ammonia in structure and basic chemical behavior, but it is much more toxic and less chemically reactive as a base. (2) Antimony does form antimony pentoxide (Sb₂O₅), which is a well-known chemical compound where antimony is in the +5 oxidation state. It is used in various industrial applications, including as a flame retardant and a catalyst. It can be prepared by several chemical methods, such as the hydrolysis of antimony pentachloride or oxidation of antimony trioxide with nitric acid. So, statement I is correct, but statement II is incorrect. Hence, option 1 is the correct answer.

01

PYQ 2006

easy

chemistry ID: neet-200

The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of NH 3 (1.5 D) is larger than that of NF 3 (0.2 D). This is because: 1. In NH 3 as well as in NF 3 the atomic dipole and bond dipole are in the same direction 2. In NH 3 the atomic dipole and bond dipole are in the same direction whereas in NF 3 these are in opposite directions 3. In NH 3 as well as in NF 3 the atomic dipole and bond dipole are in opposite directions 4. In NH 3 the atomic dipole and the bond dipole is in opposite directions whereas in NF 3 these are in the same directions

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(2)

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(3)

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02

PYQ 2010

easy

chemistry ID: neet-201

Which of the following represents the oxidation states of phosphorus in H 4 P 2 O 5, H 4 P 2 O 6, H 4 P 2 O 7, respectively? 1. +3, +5, +4 2. +5, +3, +4 3. +5, +4, +3 4. +3, +4, +5

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(1)

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(2)

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(3)

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03

PYQ 2012

easy

chemistry ID: neet-201

The incorrect statement regarding oxoacids of phosphorus is: 1. Orthophosphoric acid is used in the manufacture of triple superphosphate. 2. Hypophosphorous acid is a diprotic acid. 3. All oxoacids contain tetrahedral four coordinated phosphorus. 4. All oxoacids contain at least one P=O unit and one P-OH group.

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04

PYQ 2013

easy

chemistry ID: neet-201

Which of the following compounds does not release oxygen when heated? 1. Zn(ClO 3) 2 2. K 2 Cr 2 O 7 3. (NH 4) 2 Cr 2 O 7 4. KClO 3

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(1)

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05

PYQ 2015

easy

chemistry ID: neet-201

The strong reducing behaviour of H 3 PO 2 is due to: 1. Presence of one -OH group and two P-H bonds. 2. High electron gain enthalpy of phosphorus. 3. High oxidation state of phosphorus. 4. Presence of two -OH groups and one P-H bond.

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(4)

06

PYQ 2019

easy

chemistry ID: neet-201

Match the name of process given in Column-I with the name of compound given in Column-II and mark the correct option. Column-I Column-II (a) Pure nitrogen (i) Chlorine (b) Haber process (ii) Sulphuric acid (c) Contact process (iii) Ammonia (d) Deacon's process (iv) Sodium azide or Barium azide (a) (b) (c) (d) 1. (iv) (iii) (ii) (i) 2. (i) (ii) (iii) (iv) 3. (ii) (iv) (i) (iii) 4. (iii) (iv) (ii) (i)

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07

PYQ 2019

easy

chemistry ID: neet-201

False statement regarding PCl 5 is: 1. PCl 5 molecule is non-reactive. 2. Three equatorial P-Cl bonds make an angle of 120° with each other. 3. Two axial P-Cl bonds make an angle of 180° with each other. 4. Axial P-Cl bonds are longer than equatorial P-Cl bonds.

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08

PYQ 2020

medium

chemistry ID: neet-202

Which one of the following reactions does not come under hydrolysis type reaction? 1. 2. 3. 4.

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09

PYQ 2021

easy

chemistry ID: neet-202

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it? 1. NH 3 < PH 3 < AsH 3 < SbH 3 Increasing acidic character 2. CO 2 < SiO 2 < SnO 2 < PbO 2 Increasing oxidizing power 3. HF < HCl < HBr < HI Increasing acidic strength 4. H 2 O < H 2 S < H 2 Se < H 2 Te Increasing pK a values

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10

PYQ 2025

medium

chemistry ID: neet-202

Given below are two statements : Statement I: Like nitrogen that can form ammonia, arsenic can form arsine. Statement II: Antimony cannot form antimony pentoxide. In light of the above statements, choose the most appropriate answer from the options given below: 1. Statement I is correct but Statement II is incorrect 2. Statement I is incorrect but Statement II is correct 3. Both Statement I and Statement II are correct 4. Both Statement I and Statement II are incorrect

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(1)

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(2)

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Group 15 Preparation Properties Uses

High-Yield Trend

Questions
10 MCQs

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1.	In NH₃ as well as in NF₃the atomic dipole and bond dipole are in the same direction
2.	In NH₃ the atomic dipole and bond dipole are in the same direction whereas in NF₃ these are in opposite directions
3.	In NH₃ as well as in NF₃the atomic dipole and bond dipole are in opposite directions
4.	In NH₃ the atomic dipole and the bond dipole is in opposite directions whereas in NF₃ these are in the same directions

1.	Orthophosphoric acid is used in the manufacture of triple superphosphate.
2.	Hypophosphorous acid is a diprotic acid.
3.	All oxoacids contain tetrahedral four coordinated phosphorus.
4.	All oxoacids contain at least one P=O unit and one P-OH group.

	Column-I		Column-II
(a)	Pure nitrogen	(i)	Chlorine
(b)	Haber process	(ii)	Sulphuric acid
(c)	Contact process	(iii)	Ammonia
(d)	Deacon's process	(iv)	Sodium azide or Barium azide

1.	PCl₅ molecule is non-reactive.
2.	Three equatorial P-Cl bonds make an angle of 120° with each other.
3.	Two axial P-Cl bonds make an angle of 180° with each other.
4.	Axial P-Cl bonds are longer than equatorial P-Cl bonds.

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2.	$%5Cmathrm%7BL%20i_%7B3%7D%20N_%7B%5Cleft(%20s%20%5Cright)%7D%20%2B%202%20H_%7B2%7D%20O_%7B%5Cleft(%20l%20%5Cright)%7D%20%5Crightarrow%20N%20H_%7B3%20%5Cleft(%20g%20%5Cright)%7D%20%2B%203%20L%20i%20O%20H_%7B%5Cleft(%20a%20q%20%5Cright)%7D%7D$
3.	$%5Cmathrm%7B2%20F_%7B2%20%5Cleft(%20g%20%5Cright)%7D%20%2B%202%20H_%7B2%7D%20O_%7B%5Cleft(%20l%20%5Cright)%7D%20%5Crightarrow%204%20H%20F_%7B%5Cleft(%20a%20q%20%5Cright)%7D%20%2B%20O_%7B2%20%5Cleft(%20g%20%5Cright)%7D%7D$
4.	$%5Cmathrm%7BP_%7B4%7D%20O_%7B10%20%5Cleft(%20s%20%5Cright)%7D%20%2B%206%20H_%7B2%7D%20O_%7B%5Cleft(%20l%20%5Cright)%7D%20%5Crightarrow%204%20H_%7B3%7D%20P%20O_%7B4%20%5Cleft(%20a%20q%20%5Cright)%7D%7D$

1.	NH₃< PH₃< AsH₃< SbH₃	Increasing acidic character
2.	CO₂< SiO₂< SnO₂< PbO₂	Increasing oxidizing power
3.	HF < HCl < HBr < HI	Increasing acidic strength
4.	H₂O < H₂S < H₂Se < H₂Te	Increasing pK_a values

Statement I:	Like nitrogen that can form ammonia, arsenic can form arsine.
Statement II:	Antimony cannot form antimony pentoxide.

1.	Statement I is correct but Statement II is incorrect
2.	Statement I is incorrect but Statement II is correct
3.	Both Statement I and Statement II are correct
4.	Both Statement I and Statement II are incorrect

Group 15 Preparation Properties Uses

High-Yield Trend

Questions 10 MCQs

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Questions
10 MCQs