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p- Block Elements Chemistry - p- Block Elements

Rajasthan Board (RBSE) - STD 12 Science - Chemistry (Rajasthan - English Medium). 115 questions in this chapter.

Question types

p- Block Elements question types

115 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

115
Questions
6
Question groups
5
Question types
Sample Questions

p- Block Elements questions

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

Q 2M.C.Q (1 Marks)1 Mark
Which of the following is the molecular formula of Orthophosphoric acid?
  • A
    $ H_{3}PO_{3} $
  • ✓
    $ H_{3}PO_{4} $
  • C
    $ HPO_{3} $
  • D
    $ H_{4}P_{2}O_{7} $

Answer: B.

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Q 4M.C.Q (1 Marks)1 Mark
Which of the following oxides of nitrogen is called laughing gas?
  • A
    Nitric oxide
  • ✓
    Nitrous oxide
  • C
    Dinitrogen trioxide
  • D
    Dinitrogen pentoxide

Answer: B.

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Q 5M.C.Q (1 Marks)1 Mark
Which of the following elements has electronic configuration $1 s^2 2 s^2 2 p x^1 2 p y^1 2 p z^1$
  • A
    Oxygen
  • B
    Hydrogen
  • ✓
    Nitrogen
  • D
    Fluorine

Answer: C.

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Q 71 Marks Question1 Mark
Write balanced equations for the following : (i) NaCl is heated with sulphuric acid in the presence of $MnO _2$, (ii) Chlorine gas is passed into a solution of NaI in water.
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Q 122 Marks Questions2 Marks
Complete the following reaction :
(i) $\quad KBr + Cl _2 \longrightarrow \ldots \ldots+\ldots \ldots$.
(ii) $I _2+ H _2 O + Cl _2 \longrightarrow \ldots \ldots .+\ldots \ldots .$.
(iii) $\quad NaOH + Cl _2 \longrightarrow \ldots \ldots+\ldots \ldots$
(Cold and dilute)
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Q 142 Marks Questions2 Marks
Answer the following :
(a) Sulphurous acid is a reducing agent.
(b) Fluorine forms only one oxoacid.
(c) Boiling point of noble gases increases from He to Rn.
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Q 152 Marks Questions2 Marks
Complete the following chemical reactions :
(a) $MnO _2+4 HCl \longrightarrow$
(b) $XeF _6+ KF \longrightarrow$
(c) $I ^{-}( aq )+ H ^{+}( aq )+ O _2(g) \longrightarrow$
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Q 163 Marks Question3 Marks
Draw the structure of the following:
(i) $ H_{3}PO_{4} $, (ii) $ H_{3}PO_{3} $, (iii) $ H_{3}PO_{2} $, (iv) $ H_{4}P_{2}O_{7} $, (v) $ (HPO_{3})_{3} $
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Q 205 Marks Questions5 Marks
(a) Give reasons for the following:
(i) Sulphur in vapour state shows paramagnetic behaviour.
(ii) $N - N$ bond is weaker than $P - P$ bond.
(iii) Ozone is thermodynamically less stable than oxygen.
(b) Write the name of gas released when Cu is added to
(i) dilute $HNO _3$ and (ii) conc. $HNO _3$.
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Q 215 Marks Questions5 Marks
(a) (i) Write the disproportionation reaction of $H _3 PO _3$.
(ii) Draw the structure of $XeF _4$.
(b) Account for the following:
(i) Although fluorine has less negative electron gain enthalpy yet $F_2$ is a strong oxidizing agent.
(ii) Acidic character decreases from $N _2 O _3$ to $Bi _2 O _3$ in group 15.
(c) Write a chemical reaction to test Sulphur dioxide gas. Write the chemical equation involved.
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Q 235 Marks Questions5 Marks
(a) Write the principle of manufacture of sulphuric acid by contact process.###(b) Write the reaction of concentrated sulphuric acid with oxalic acid.
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