The p-Block Elements (Group 15 to 18)

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1. 1 2023 #
   Match List-I (Oxoacids of Sulphur) with List-II (Bonds of Sulphur):

   Column I

   • A. Peroxodisulphuric acid
   • B. Sulphuric acid
   • C. Pyrosulphuric acid
   • D. Sulphurous acid

   Column II

   • I. Two S-OH, Four S=O, One S-O-S
   • II. Two S-OH, One S=O
   • III. Two S-OH, Four S=O, One S-O-O-S
   • IV. Two S-OH, Two S=O
   Check Answer
2. 2 2022 #
   ICl is more reactive than $I_2$.
   Reason: I-Cl bond is weaker than I-I bond
   A Both A and R are true and R is the correct explanation of A

   B Both A and R are true but R is NOT the correct explanation of A

   C A is true but R is false

   D A is false but R is true
   Check Answer
3. 3 2022 #
   Given below are two statements: Statement I: The boiling points of the following hydrides of group 16 elements increases in the order- $H_2O<H_2S<H_2Se<H_2Te$ Statement II: The boiling points of these hydrides increase with increase in molar mass. In the light of the above statements, choose the most appropriate answer from the options given below:
   A Statement I is incorrect but Statement II is correct

   B Both Statement I and Statement II are correct

   C Both Statement I and Statement II are incorrect

   D Statement I is correct but Statement II is incorrect
   Check Answer
4. 4 2021 #
   Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.
   A Noble gases have very high melting and boiling points

   B Noble gases have weak dispersion forces

   C Noble gases have large positive values of electron gain enthalpy

   D Noble gases are sparingly soluble in water
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5. 5 2021 #
   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, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below.
   A Both statement I and statement II are false

   B Statement I is correct but statement II is false

   C Statement I is incorrect but statement II is true

   D Both statement I and statement II are true
   Check Answer
6. 6 2021 #
   In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?
   A $H_2O<H_2S<H_2Se<H_2Te$ : Increasing $pK_a$ values

   B $NH_3<PH_3<AsH_3<SbH_3$ : Increasing acidic character

   C $CO_2<SiO_2<SnO_2<PbO_2$ : Increasing oxidising power

   D $HF<HCl<HBr<HI$ : Increasing acidic strength
   Check Answer
7. 7 2020 #
   Which of the following oxoacid of sulphur has $-O-O-$ linkage?
   A $H_2SO_4$, sulphuric acid

   B $H_2S_2O_8$, peroxodisulphuric acid

   C $H_2S_2O_7$, pyrosulphuric acid

   D $H_2SO_3$, sulphurous acid
   Check Answer
8. 8 2019 #
   Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code:

   Column I

   • A. $XeF_4$
   • B. $XeF_6$
   • C. $XeOF_4$
   • D. $XeO_3$

   Column II

   • I. pyramidal
   • II. square planar
   • III. distorted octahedral
   • IV. square pyramidal
   Check Answer
9. 9 2019 #
   Which is the correct thermal stability order for $H_2E$ (E = O, S, Se, Te and Po)?
   A $H_2S<H_2O<H_2Se<H_2Te<H_2Po$

   B $H_2O<H_2S<H_2Se<H_2Te<H_2Po$

   C $H_2Po<H_2Te<H_2Se<H_2S<H_2O$

   D $H_2Se<H_2Te<H_2Po<H_2O<H_2S$
   Check Answer
10. 10 2019 #
    The correct structure of tribromooctaoxide is: [add image]
    A [add image]

    B [add image]

    C [add image]

    D [add image]
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11. 11 2019 #
    Match the following:

    Column I

    • A. Pure nitrogen
    • B. Haber process
    • C. Contact process
    • D. Deacon's process

    Column II

    • I. Chlorine
    • II. Sulphuric acid
    • III. Ammonia
    • IV. Sodium azide or Barium azide
    Check Answer