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NEET UG Chemical Reactions and Equations — practice questions

Explore 15 free Chemical Reactions and Equations questions in NEET UG Science. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Reactions and Equations questions and exercises with answers

Showing questions 1–15 of 15.

According to VSEPR theory, the shape of a molecule is determined byRead the answer and worked solution →The hybridisation of carbon in methane (CH₄) isRead the answer and worked solution →Which molecule is non-polar despite having polar bonds?Read the answer and worked solution →The bond order of the oxygen molecule O₂ (by molecular orbital theory) isRead the answer and worked solution →A coordinate (dative) bond differs from a normal covalent bond in thatRead the answer and worked solution →Which species has sp hybridisation on the central atom?Read the answer and worked solution →As bond order increases, bond lengthRead the answer and worked solution →An ionic bond forms byRead the answer and worked solution →The shape of NH₃ is pyramidal rather than planar becauseRead the answer and worked solution →Which has the highest dipole moment?Read the answer and worked solution →Among the following, which is paramagnetic?Read the answer and worked solution →Formal charge on an atom =Read the answer and worked solution →Match each reaction type to an example.Read the answer and worked solution →Balance the combustion of methane.Read the answer and worked solution →Balance magnesium burning in oxygen.Read the answer and worked solution →

Worked practice questions

According to VSEPR theory, the shape of a molecule is determined by

  1. the colour of the element
  2. temperature
  3. repulsion between electron pairs around the central atom
  4. the atomic mass
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Correct answer: C. repulsion between electron pairs around the central atom

VSEPR: electron pairs (bonding + lone) arrange to minimise repulsion, fixing the molecular geometry.

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The hybridisation of carbon in methane (CH₄) is

  1. sp
  2. sp³
  3. sp³d
  4. sp²
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Correct answer: B. sp³

Four sigma bonds, tetrahedral → sp³ hybridisation.

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Which molecule is non-polar despite having polar bonds?

  1. HCl
  2. H₂O
  3. NH₃
  4. CO₂
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Correct answer: D. CO₂

CO₂ is linear and symmetric, so the two C=O bond dipoles cancel → net zero dipole. H₂O and NH₃ are bent/pyramidal (net dipole).

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