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p -Block elements - ll Chemistry - p -Block elements - ll

CBSE - STD 12 Science - Chemistry (CBSE - English Medium). 1,563 questions in this chapter.

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p -Block elements - ll question types

1,563 questions across 1 question group — pick any mix to generate a Chemistry paper with step-by-step answer keys.

1,563
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1
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5
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Sample Questions

p -Block elements - ll questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
Given below are two statements:

Statement $I$: The boiling point of hydrides of Group $16$ elements follow the order

$\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{~S}$.

Statement $II$: On the basis of molecular mass, $\mathrm{H}_2 \mathrm{O}$ is expected to have lower boiling point than the othe members of the group but due to the presence of extensive $\mathrm{H}$-bonding in $\mathrm{H}_2 \mathrm{O}$, it has higher boiling point.

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 true but Statement $II$ is false
  • ✓
     Statement $I$ is false but Statement $II$ is true
  • D
    Both Statement $I$ and Statement $II$ are true

Answer: C.

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Q 3M.C.Q (1 Marks)1 Mark
Match List$-l$ with List$-ll$ :

List$-I$ (Oxoacids 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 acid $III$. Two $S - OH$, Four $S = O$, One $S - O - O - S$
$D$. Sulphurous acid $IV$. Two $S - OH$, Two $S = O$

Choose the correct answer from the options given below.

  • A
    $A-III, B-IV, C-II, D-I$
  • B
    $A-I, B-III, C-II, D-IV$
  • C
    $A-III, B-IV, C-I, D-II$
  • D
    $A-I, B-III, C-IV, D-II$
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Q 5M.C.Q (1 Marks)1 Mark
Given below are two statements : one is labelled as Assertion $A$ and the other is labelled as Reason $F$

Assertion $A$: Helium is used to dilute oxygen in diving apparatus.

Reason $R:$ Helium has high solubility in $O _2$.

In the light of the above statements, choose the correct answer from the options given below

  • A
    $A$ is false but $R$ is true
  • B
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • C
    Both $A$ and $R$ are true and $R$ is NOT the correct explanation of $A$
  • ✓
    $A$ is true but $R$ is false

Answer: D.

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