PYQSide ExamsMy practice

p-Block Elements (Group 15–18) · Question 25

NEET 2018MCQMedium📈 Topic in 50% papers+4−1
1

Which of the following statements is not true for halogens?

  1. All are oxidizing agents.
  2. All form monobasic oxyacids.
  3. All but fluorine show positive oxidation states.
  4. Chlorine has the highest electron-gain enthalpy.

Answer

(3) All but fluorine show positive oxidation states.

Solution

(1) All halogens readily accept an electron ⇒ all are oxidising agents (F2 the strongest). True.

(2) Oxoacids such as HOF, HOCl, HClO4, HIO4 contain one ionisable –OH ⇒ monobasic. True.

(4) As per NCERT, chlorine has the most negative electron gain enthalpy in the group (fluorine is less because of its small size). True.

(3) As per NCERT, all halogens show the −1 oxidation state; chlorine, bromine and iodine show −1 as well as +1, +3, +5 and +7. So halogens other than fluorine do not show only positive oxidation states — the statement is not true.

Answer: (3)

NEET 2018

Keep practising — p-Block Elements (Group 15–18)

2

Match the interhalogen compounds of column-I with the geometry in column-II and assign the correct code.

  1. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
  2. (a)-(v), (b)-(iv), (c)-(iii), (d)-(ii)
  3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
  4. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
NEET 2017
3

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

  1. S4O62-, S2O32-
  2. S2O72-, S2O82-
  3. S4O62-, S2O72-
  4. S2O72-, S2O32-
NEET 2017
4

Name the gas that can readily decolourise acidified KMnO4 solution.

  1. SO2
  2. NO2
  3. P2O5
  4. CO2
NEET 2017
5

HgCl2 and I2 both when dissolved in water containing I- ions, the pair of species formed is

  1. HgI2, I-
  2. HgI42-, I3-
  3. Hg2I2, I-
  4. HgI2, I3-
NEET 2017
6

Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option

  1. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
  2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  3. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
  4. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
NEET 2016 (Phase 1)
7

Which is the correct statement for the given acids?

  1. Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.
  2. Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.
  3. Both are diprotic acids.
  4. Both are triprotic acids.
NEET 2016 (Phase 1)
8

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

  1. Br2 > I2 > F2 > Cl2
  2. F2 > Cl2 > Br2 > I2
  3. I2 > Br2 > Cl2 > F2
  4. Cl2 > Br2 > F2 > I2
NEET 2016 (Phase 1)
9

When copper is heated with conc. HNO3 it produces

  1. Cu(NO3)2, NO and NO2
  2. Cu(NO3)2 and N2O
  3. Cu(NO3)2 and NO2
  4. Cu(NO3)2 and NO
NEET 2016 (Phase 1)
10

Among the following the correct order of acidity is

  1. HClO2 < HClO < HClO3 < HClO4
  2. HClO4 < HClO2 < HClO < HClO3
  3. HClO3 < HClO4 < HClO2 < HClO
  4. HClO < HClO2 < HClO3 < HClO4
NEET 2016 (Phase 1)
11

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

  1. Cu + 2H2SO4 CuSO4 + SO2 + 2H2O
  2. 3S + 2H2SO4 3SO2 + 2H2O
  3. C + 2H2SO4 CO2 + 2SO2 + 2H2O
  4. CaF2 + H2SO4 CaSO4 + 2HF
NEET 2016 (Phase 2)

All p-Block Elements (Group 15–18) PYQs →

PDFDownload p-Block Elements (Group 15–18) PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolid StateSolutionsElectrochemistryChemical KineticsSurface Chemistry
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular StructureHydrogens-Block Elementsp-Block Elements (Group 13 & 14)Environmental ChemistryGeneral Principles of Isolation of Elementsp-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPolymersChemistry in Everyday LifePrinciples Related to Practical Chemistry