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JEE Main Chemistry · p-Block Elements · Set 4 (Q91-120)

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  1. 91.
    Identify the element having positive electron gain enthalpy,
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 92.
    Which one of the following molecular hydrides acts as a Lewis acid?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  3. 93.
    The correct order of the oxidation states of nitrogen in and is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 94.
    The correct order of melting points of hydrides of group 16 elements is :
    1. (1)S < Se < Te < O
    2. (2)O < S < Se < Te
    3. (3)S < Te < Se < O
    4. (4)Se < S < Te < O
  5. 95.
    Dinitrogen and dioxygen. the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because
    1. (1) is unreactive in the condition of atmosphere.
    2. (2)Oxides of nitrogen are unstable.
    3. (3)Reaction between them can occur in the presence of a catalyst.
    4. (4)The reaction is endothermic and require very high temperature.
  6. 96.
    Which of the following anions is present in the chain structure of silicates?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 97.
    The correct order of the thermal stability of hydrogen halides (H – X) is :
    1. (1)HI > HBr > HCl > HF
    2. (2)HF > HCl > HBr > HI
    3. (3)HCl < HF < HBr < HI
    4. (4)HI > HCl < HF < HBr
  8. 98.
    Given below are two statements:
    Statement I: Boron is extremely hard indicating its high lattice energy.
    Statement II: Boron has highest melting and boiling point compared to its other group members.
    In the light of the above statements, choose the most appropriate answer from the options given below
    1. (1)Both Statement I and Statement II are incorrect
    2. (2)Statement I is correct but Statement II is incorrect
    3. (3)Both statement I and Statement II are correct
    4. (4)Statement I is incorrect but Statement II is correct
  9. 99.
    On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to a blue solid (C). The oxidation number of nitrogen in solid (C) is:
    1. (1)+3
    2. (2)+4
    3. (3)+5
    4. (4)+2
  10. 100.
    On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed?
    1. (1)Nitric oxide
    2. (2)Nitrous oxide
    3. (3)Lead nitrate
    4. (4)Sulphur
  11. 101.
    The noble gas mixture is cooled in a coconut bulb at . The gases that are not adsorbed are
    1. (1)Ne and Xe
    2. (2)He and Xe
    3. (3)Ar and Kr
    4. (4)He and Ne.
  12. 102.
    Iodine reacts with concentrated to yield along with other products. The oxidation state of iodine in is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 103.
    Which halogen forms an oxyacid that contains the halogen atom in tripositive oxidation state?
    1. (1)Fluorine
    2. (2)Chlorine
    3. (3)Bromine
    4. (4)Iodine
  14. 104.
    Identify the correct statements from the following:
    I. is used as refrigerant for ice-cream and frozen food.
    II. The structure of contains twelve six carbon rings and twenty five carbon rings.
    III. ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
    IV. CO is colorless and odourless gas.
    1. (1)I and III only
    2. (2)II and III only
    3. (3)III and IV only
    4. (4)I, II and III only
  15. 105.
    Match List-I with List-II

    Choose the correct answer from the option given below:
    1. (1)(1)-(iii), (2)-(ii), (3)-(i), (4)-(iv)
    2. (2)(1)-(iv), (2)-(iii), (3)-(i), (4)-(ii)
    3. (3)(1)-(iv), (2)-(i), (3)-(ii), (4)-(iii)
    4. (4)(1)-(i), (2)-(iii), (3)-(iv), (4)-(ii)
  16. 106.
    The structural formula of hypophosphorous acid is
    1. (1)
    2. (2)
    3. (3)
    4. (4)None of these
  17. 107.
    Better method for preparation of , among the following is
    1. (1)BeO + C +
    2. (2)
    3. (3)Be+
    4. (4) +
  18. 108.
    Which one of the following ionic species has the greatest proton affinity to form stable compound
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 109.
    Which of the following species is not stable?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 110.
    is well known, but is not. Because.
    1. (1)nitrogen is less reactive than phosphorous.
    2. (2)nitrogen doesn't have d-orbitals in its valence shell.
    3. (3)catenation tendency is weaker in nitrogen than phosphorous.
    4. (4)size of phosphorous is larger than nitrogen.
  21. 111.
    Given below are two statements:
    Statement (I): The first ionization enthalpy of group 14 elements is higher than the corresponding elements of group 13.
    Statement (II): Melting points and boiling points of group 13 elements are in general much higher than those of corresponding elements of group 14.
    In the light of the above statements, choose the most appropriate answer from the options given below:
    1. (1)Statement I is correct but Statement II is incorrect
    2. (2)Both Statement I and Statement II are incorrect
    3. (3)Statement I is incorrect but Statement II is correct
    4. (4)Both Statement I and Statement II are correct
  22. 112.
    Each of the following is true for white and red phosphorus except that they
    1. (1)are both soluble in
    2. (2)can be oxidised by heating in air
    3. (3)consist of the same kind of atoms
    4. (4)can be converted into one another.
  23. 113.
    In which one of the following arrangements the given sequence is not strictly according to
    the properties indicated against it?
    1. (1) : Increasing values
    2. (2) : Increasing acidic character
    3. (3) : Increasing oxidizing power
    4. (4) Increasing acidic strength
  24. 114.
    Amongst the given options, which of the following molecules/ion acts as a Lewis acid?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 115.
    Given below are two statements :
    Statement I : and forms of sulphur can change reversibly between themselves with slow heating or slow cooling.
    Statement II : At room temperature the stable crystalline form of sulphur is monoclinic sulphur.
    choose the correct answer from the options given below.
    1. (1)Both statement I and statement II are false
    2. (2)Statement I is true but statement II is false
    3. (3)Both statement I and statement II are true
    4. (4)Statement I is false but statement II is true
  26. 116.
    Which of the following is used in the preparation of chlorine?
    1. (1)Both and
    2. (2)Only
    3. (3)Only
    4. (4)Either or
  27. 117.
    , an allotrope of carbon cantains:
    1. (1) hexagons and pentagons.
    2. (2) hexagons and pentagons.
    3. (3) hexagons and pentagons.
    4. (4) hexagons and pentagons.
  28. 118.
    Identify the correct decreasing order of bond dissociation enthalpy.
    1. (1)
    2. (2)I - I
    3. (3) I - I
    4. (4) I - I
  29. 119.
    Which of the following is the most basic oxide?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  30. 120.
    Among the following oxide of p - block elements, number of oxides having amphoteric nature is