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p Block Elements (Group 15, 16, 17 & 18) — NEET UG Chemistry PYQs

1,072 previous year questions from p Block Elements (Group 15, 16, 17 & 18) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

1,072 questionsChemistrySolutions on every page
1

Identify the incorrect statement from the following :

NEET 2026 Solution View → 2

Given below are two statements: Statement-I : Heating NaCl with concentrated H₂ SO₄ and MnO₂ results in oxidation of Mn. Statement-II : Heating NaI with concentrated H₂ SO₄ and MnO

NEET 2026 Solution View → 3

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 the light of

NEET 2025 Solution View → 4

Match List - I with List-II array llll & List-I & & List-II . & XeO ₃ & I. & sp ^3 ~d , linear . & XeF ₂ & II. & sp ^3 ; pyramidal . & XeOF ₄ & III. & sp ^3 ~d ^3 ; distorted octah

NEET 2025 Solution View → 5

Among Group 16 elements, which one does NOT show -2 oxidation state?

NEET 2024 Solution View → 6

Identify the incorrect statement.

NEET 2024 Solution View → 7

The products A and B obtained in the following reactions, respectively, are aligned & 3 ROH + PCl ₃ 3 RCl + A & ROH + PCl ₅ RCl + HCl + B aligned

NEET 2024 Solution View → 8

Given below are two statements: Statement I: The boiling point of hydrides of Group 16 elements follow the order H ₂ O H ₂ Te H ₂ Se H ₂ ~S . Statement II: On the basis of molecula

NEET 2024 Solution View → 9

Identify the incorrect statement from the following:

NEET 2024 Solution View → 10

Match List-I with List-II List-I(Oxo acids of Sulphur) List-II(Bonds) A Peroxodisulphuric acid I Two S-OH, Four S=O, One S-O-S B Sulphuric acid II Two S-OH, One S=O C Pyrosulphuric

NEET 2023 Solution View → 11

Match list-I with List-II : List - I List - II A. Coke I. Carbon atoms are sp 3 hybridised B. Diamond II. Used as dry lubricants C. Fullerene III. Used as a reducing agent D. Graph

NEET 2023 Solution View → 12

Flourine is a stronger oxidising agent than chlorine because : (a) F-F bond has a low enthalpy of dissociation. (b) Flouride ion ( F ⁻ ) has high hydration enthalpy (c) Electron ga

NEET 2022 Solution View → 13

Choose the correct statement:

NEET 2022 Solution View → 14

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : ICl is more reactive than I 2 . Reason R : I - Cl bond is weak

NEET 2022 Solution View → 15

Which of the following reactions is a part of the large scale industrial preparation of nitric acid?

NEET 2022 Solution View → 16

Statement I: Acid strength increases in the order given as HF < < HCl < < HBr < < HI Statement II: As the size of the elements F ,   Cl ,   Br , &

NEET 2021 Solution View → 17

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?

NEET 2021 Solution View → 18

Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.

NEET 2021 Solution View → 19

Match the compounds of Xe in column I with the molecular structure in column II. Column-I Column-II (a) XeF 2 (p) Square planar (b) XeF 4 (q) Linear (c) XeO 3 (r) Square pyramidal

NEET 2020 Solution View → 20

Which of the following oxoacid of sulphur has – O – O – linkage?

NEET 2020 Solution View → 21

On electrolysis of dil. sulphuric acid using Platinum Pt electrode, the product obtained at anode will be

NEET 2020 Solution View → 22

Strong oxidising agent used in purification of water is

AIIMS 2019 Solution View → 23

Assertion : Pure N ₂ is obtained from Ba ( N ₃ )₂ but not from ( NH ₄ )₂ Cr ₂ O ₇ . Reason : On decomposition, ( NH ₄ )₂ Cr ₂ O ₇ gives O ₂ gas.

AIIMS 2019 Solution View → 24

How is ammonia generally manufactured in large scale?

AIIMS 2019 Solution View → 25

In dimer of phosphorus pentoxide, in what order number of P - P , P = O and P - O - P bonds are there?

AIIMS 2019 Solution View → 26

Which of the following reacts most slowly with nitric acid?

AIIMS 2019 Solution View → 27

Yellow colour of chlorine water fades because

AIIMS 2019 Solution View → 28

Which will release NH ₃ on reaction with NaOH ?

AIIMS 2019 Solution View → 29

In which of the following, oxidation state of phosphorous is +3 ?

JIPMER 2019 Solution View → 30

Which of the following rare gas is the abundant in air?

JIPMER 2019 Solution View → 31

Which one of the following nitro compound does not react with nitrous acid?

JIPMER 2019 Solution View → 32

A compound ' X ^ upon reaction with H ₂ O produced a colourless gas ' Y ' with rotten fish smell. Gas ' Y ' is absorbed in a solution of CuSO ₄ to give Cu ₃ P ₂ as one of the produ

NEET 2019 Solution View → 33

Which of the following oxoacids of phosphorus has strongest reducing property?

NEET 2019 Solution View → 34

Identify the correct formula of oleum from the following

NEET 2019 Solution View → 35

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is:

NEET 2019 Solution View → 36

Which is the correct thermal stability order for H 2 E E = O ,   S ,   S e ,   T e   a n d   P o ?

NEET 2019 Solution View → 37

Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code: Column-I Column-II a   X e F 4 i       pyramidal b   X e

NEET 2019 Solution View → 38

Match the following: a   Pure nitrogen i   Chlorine b Haber process i i Sulphuric acid c   Contact process i i i Ammonia d   Deacon’s process i v Sodium a

NEET 2019 Solution View → 39

Assertion : Pure N ₂ is formed from Ba ( N ₃ )₂ . Reason : Thermal decomposition of NaN ₃ is used to inflate the air bags used for safety devices in some cars.

AIIMS 2018 Solution View → 40

Which of the following statements is incorrect?

AIIMS 2018 Solution View → 41

Which of the following is true for N ₂ O ₅ ?

AIIMS 2018 Solution View → 42

Assertion : F ₂ and Cl ₂ when passed through water, F ₂ is more reactive. Reason : F ₂ is most electronegative.

AIIMS 2018 Solution View → 43

Assertion : HCOOH reacts with H ₂ SO ₄ to form CO. Reason : H ₂ SO ₄ is a mild oxidising agent.

AIIMS 2018 Solution View → 44

Assertion : O ₂ ~F ₂ converts Pu to PuF ₆ . Reason : O ₂ ~F ₂ is used to remove unreacted Pu from nuclear reaction.

AIIMS 2018 Solution View → 45

Assertion : O ₃ has higher boiling point than O ₂ . Reason : O ₃ is allotrope of oxygen.

AIIMS 2018 Solution View → 46

Assertion : Brown ring test is not valid for Fe ⁺³ ion. Reason : Because NO ₃⁻ ion first gets converted into NO ₂⁻ ion.

AIIMS 2018 Solution View → 47

Which of the following contains atleast one lone pair in all of its halides?

AIIMS 2018 Solution View → 48

Assertion : Red phosphorus on heating changes its colour into black. Reason : Black phosphorus contains P ₄ units.

AIIMS 2018 Solution View → 49

Which of the following is correct statement?

JIPMER 2018 Solution View → 50

Xenon hexafluoride reacts with silica to form a xenon compound X . The oxidation state of xenon in X is

JIPMER 2018 Solution View → 51

Among the following, the correct formula of Marshall's acid is

JIPMER 2018 Solution View → 52

Which of the following chemicals are used to manufacture methyl isocyanate that caused "Bhopal tragedy"? (i) Methylamine (ii) Phosgene (iii) Phosphine (iv) Dimethylamine

JIPMER 2018 Solution View → 53

The correct order of N - compounds in its decreasing order of oxidation states is

NEET 2018 Solution View → 54

Which of the following statements is not true for halogens?

NEET 2018 Solution View → 55

Assertion : Hydrides of group-16 elements show volatility in the order: H ₂ O > H ₂ ~S > H ₂ Se > H ₂ Te Reason : Electronegativity of group-16 elements increases down the group fr

AIIMS 2017 Solution View → 56

Which of the following oxoacids of phosphorus is a reducing agent and a monobasic acid as well?

AIIMS 2017 Solution View → 57

In which of the following compounds, sulphur show maximum oxidation number?

JIPMER 2017 Solution View → 58

Sulphur reacts with chlorine in 1: 2 ratio and forms X . Hydrolysis of X gives a sulphur compound Y . The hydridisation of central atom in the anion Y is

JIPMER 2017 Solution View → 59

Among the following compounds, which will produce POCl ₃ with PCl ₅ .

JIPMER 2017 Solution View → 60

In which pair of ions do both the species contain S - S bond?

NEET 2017 Solution View → 61

Large difference in boiling points is observed in

AIIMS 2016 Solution View → 62

Assertion : Charcoal is used in separation of noble gases. Reason: Charcoal has porous structure.

AIIMS 2016 Solution View → 63

Chlorine oxidises sodium thiosulphate to form

AIIMS 2016 Solution View → 64

The true statement for the acids of phosphorus, H ₃ PO ₂, H ₃ PO ₃ and H ₃ PO ₄ is

AIIMS 2016 Solution View → 65

When excess of NaOH solution is added to aqueous solution of iodine, the colour of solution becomes

JIPMER 2016 Solution View → 66

Consider the reaction, H ₂+X₂ 2 H X , where X is halogen. The reactivity of halogens decrease in the order of

JIPMER 2016 Solution View → 67

Anhydrous mixture of KF and HF contain which types of ions?

JIPMER 2016 Solution View → 68

Choose the incorrect statement about noble gas?

JIPMER 2016 Solution View → 69

Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour?

NEET 2016 Solution View → 70

Among the following, the correct order of acidity is:

NEET 2016 Solution View → 71

Identify the correct statement from the statements given below.

NEET 2016 Solution View → 72

The product obtained as a result of a reaction of nitrogen with C a C 2 is:

NEET 2016 Solution View → 73

Which of the following fluoro-compounds is most likely to behave as a Lewis base?

NEET 2016 Solution View → 74

When copper is heated with conc. H N O 3 it produces:

NEET 2016 Solution View → 75

XeF ₆ on complete hydrolysis produces

AIIMS 2015 Solution View → 76

Tincture of iodine is

AIIMS 2015 Solution View → 77

aligned & SF ₄ Hydrolysis X+Y & X+ H ₂ ~S Z aligned Here, Z is

JIPMER 2015 Solution View → 78

Which of the statement given below is incorrect?

NEET 2015 Solution View → 79

The variation of the boiling points of the hydrogen halides is in the order H F > H I > H B r > H C l . Which of the following option explains the higher boiling point

NEET 2015 Solution View → 80

Strong reducing behaviour of H 3 P O 2 is due to:

NEET 2015 Solution View → 81

Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?

NEET 2015 Solution View → 82

Rhombic sulphur dissolves best in

AIIMS 2014 Solution View → 83

Enrichment of U ²³⁵ is done by

AIIMS 2014 Solution View → 84

Which halogen forms only one oxoacid ( HOX ) ?

AIIMS 2014 Solution View → 85

Assertion : Al becomes passive in conc. HNO ₃ . Reason: Conc. HNO ₃ has no action on aluminium metal.

AIIMS 2014 Solution View → 86

Assertion: Chloroform is stored in dark coloured bottles. Reason: Chronic chloroform exposure may cause damage to liver and kidneys.

AIIMS 2014 Solution View → 87

Assertion : H ₃ PO ₃ is dibasic acid. Reason: Two hydrogen atoms are directly attached to the P.

AIIMS 2014 Solution View → 88

Which of the following is not correct?

JIPMER 2014 Solution View → 89

Acidity of diprotic acids in aqueous solutions increases in the order:

NEET 2014 Solution View → 90

a   H 2 O 2 + O 3 → H 2 O + 2 O 2 b   H 2 O 2 + A g 2 O → 2 A g + H 2 O + O 2 Role of hydrogen peroxide in the above reactions is respectively:

NEET 2014 Solution View → 91

Which of the following statement is not true for hydrolysis of XeF ₆ ?

AIIMS 2013 Solution View → 92

Assertion : Phosphoric acid has no reducing properties. Reason : Phosphoric acid does not contain P - H bonds.

AIIMS 2013 Solution View → 93

When Br ₂ is treated with aqueous solutions of NaF , NaCl , NaI separately

JIPMER 2013 Solution View → 94

Which of the following is the increasing order of enthalpy of vaporization?

JIPMER 2013 Solution View → 95

Which of the following structure is similar to graphite?

NEET 2013 Solution View → 96

Which of the following does not give oxygen on heating?

NEET 2013 Solution View → 97

How many P = O bond present in ( HPO ₃ )₃ ?

AIIMS 2012 Solution View → 98

N - N bond length is minimum in

AIIMS 2012 Solution View → 99

Assertion : Fluorine is a stronger oxidizing agent than iodine. Reason : Fluorine has greater electronegativity than iodine.

AIIMS 2012 Solution View → 100

Assertion : Cl ₂ gas bleaches the articles permanently. Reason : Cl ₂ is a strong reducing agent.

AIIMS 2012 Solution View → 101

Which of the following is the correct statement for PH ₃ ?

AIIMS 2012 Solution View → 102

Assertion : H ₃ PO ₂ has strong reducing property but H ₃ PO ₄ does not. Reason : P - OH bond present in H ₃ PO ₄ .

AIIMS 2012 Solution View → 103

Which of the following statements is not valid for oxoacids of phosphorus?

NEET 2012 Solution View → 104

When Cl ₂ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

NEET 2012 Solution View → 105

Sulphur trioxide can be obtained by which of the following reaction

NEET 2012 Solution View → 106

Iodine oxidises sodium borohydride to give

AIIMS 2011 Solution View → 107

PCl ₃ on hydrolysis gives fumes of

AIIMS 2011 Solution View → 108

Best method to form aromatic iodide is

AIIMS 2011 Solution View → 109

First compound of Xe synthesized was

AIIMS 2011 Solution View → 110

Assertion : Helium is used in diving apparatus. Reason : Solubility of helium is less in blood.

AIIMS 2011 Solution View → 111

Which of the following fluorides does not exist?

JIPMER 2011 Solution View → 112

Which will liberate bromine from a solution of potassium bromide?

JIPMER 2011 Solution View → 113

In which of the following, NH ₃ is not used?

JIPMER 2011 Solution View → 114

Bromine is added to cold dilute aqueous solution of NaOH . The mixture is boiled. Which of the following statements is not true?

AIIMS 2010 Solution View → 115

Assertion : PCl ₅ is covalent in gaseous and liquid states but ionic in solid state. Reason : PCl ₅ in solid state consists of tetrahedral PCl ₄⁺ cation and octahedral PCl ₆⁻ anion

AIIMS 2010 Solution View → 116

Assertion : Helium has the highest value of ionisation energy among all the elements known. Reason : Helium has the highest value of electron affinity among all the elements known.

AIIMS 2010 Solution View → 117

The phosphate of a metal has the formula M HPO ₄ . The formula of its chloride would be

AIIMS 2010 Solution View → 118

In the electronic structure of H ₂ SO ₄ , the total number of unshared electrons is

JIPMER 2010 Solution View → 119

Oxidation states of P in H ₄ P ₂ O ₅, H ₄ P ₂ O ₆ , H ₄ P ₂ O ₇ , are respectively

NEET 2010 Solution View → 120

Match List I (substances) with List II (processes employed in the manufacture of the substances) and select the correct option.

NEET 2010 Solution View →
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