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NEET 2016
Exam
NEET
Year
2016
Subject
Chemistry
Chapter
Chemical Bonding and Molecular Structure

NEET 2016 · Chemistry · Chemical Bonding and Molecular Structure

Consider the molecules C H _ 4 , N H _ 3 and H _ 2 O . Which of the...

Consider the molecules CH4,NH3C{H}_{4}, N{H}_{3} and H2O{H}_{2}O . Which of the given statements is false?

Options

  1. AThe H - C - H bond angle in CH4C{H}_{4} , the H - N - H bond angle in NH3N{H}_{3} , and the H - O - H bond angle in H2O{H}_{2}O are all greater than 90o{90}^{o} .
  2. BThe H - O - H bond angle in H2O{H}_{2}O is larger than the H - C - H bond angle in CH4C{H}_{4} .
  3. CThe H - O - H bond angle in H2O{H}_{2}O is smaller than the H - N - H bond angle in NH3N{H}_{3} .
  4. DThe H - C - H bond angle in CH4C{H}_{4} is larger than the H - N - H bond angle in NH3N{H}_{3} .

Correct answer

B. The H - O - H bond angle in H2O{H}_{2}O is larger than the H - C - H bond angle in CH4C{H}_{4} .

Step-by-step solution

Bond Angle Molecule
104.5o{104.5}^{o} H2O{H}_{2}O
107o{107}^{o} NH3N{H}_{3}
109o28′{109}^{o}{28}^{′} CH4C{H}_{4}
All the molecules are sp3s{p}^{3} hybridized and Bond angle of H2O{H}_{2}O is smaller than NH3N{H}_{3} because in H2O{H}_{2}O two lone pairs are present due to which there will be more lone pair-lone pair repulsion while inNH3{NH}_{3},only one lone pair is present, so lone pair-bond pair repulsion is present only.
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