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NEET UG Atomic combinations — practice questions

Explore 30 free Atomic combinations questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Atomic combinations questions and exercises with answers

Showing questions 1–30 of 30.

The electrons of the outermost shell are known as:Read the answer and worked solution →In chemical combination, the inner shell electrons are generally:Read the answer and worked solution →Who introduced simple notations for the valence electrons of an atom?Read the answer and worked solution →G.N. Lewis was a chemist from:Read the answer and worked solution →In forming a bond, each atom attains a stable outer:Read the answer and worked solution →The unit of bond enthalpy is:Read the answer and worked solution →Bond order is given by the number of bonds between:Read the answer and worked solution →The bond order in a hydrogen molecule is:Read the answer and worked solution →The bond order in an oxygen molecule is:Read the answer and worked solution →The bond order in a nitrogen molecule is:Read the answer and worked solution →Which of these also has a bond order of three?Read the answer and worked solution →Isoelectronic molecules and ions have identical:Read the answer and worked solution →As bond order increases, the bond enthalpy:Read the answer and worked solution →As bond order increases, the bond length:Read the answer and worked solution →The nitrogen bond enthalpy of 946 kJ per mol is one of the:Read the answer and worked solution →A bond where the electron pair sits exactly between identical nuclei is:Read the answer and worked solution →In a molecule such as HF, the covalent bond is:Read the answer and worked solution →A sigma bond is formed by overlap that is:Read the answer and worked solution →Head-on overlap along the internuclear axis is also called:Read the answer and worked solution →In a pi bond, the axes of the overlapping orbitals remain:Read the answer and worked solution →Sidewise overlapping produces charged clouds shaped like a:Read the answer and worked solution →The strength of a bond depends chiefly on the extent of:Read the answer and worked solution →Work out the bond ordersRead the answer and worked solution →Sigma bond or pi bondRead the answer and worked solution →Match each term to its meaningRead the answer and worked solution →True or false on bondingRead the answer and worked solution →Rises or falls with bond orderRead the answer and worked solution →Fill the gaps on bondingRead the answer and worked solution →Quick picks on bondingRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →

Worked practice questions

The electrons of the outermost shell are known as:

  1. Valence
  2. Vacant
  3. Various
  4. Vertical
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Correct answer: A. Valence

1. Only some electrons take part when a molecule forms. 2. Only the outer shell electrons take part in chemical combination. 3. They are known as valence electrons. _Source: syllabus Chemistry, Ch 4 'Chemical Bonding and Molecular Structure'_

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In chemical combination, the inner shell electrons are generally:

  1. Not indicated
  2. Not involved
  3. Not isolated
  4. Not included
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Correct answer: B. Not involved

1. The inner electrons are well protected by the outer ones. 2. They are generally not involved in the combination process. 3. So the correct answer is not involved. _Source: syllabus Chemistry, Ch 4 'Chemical Bonding and Molecular Structure'_

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Who introduced simple notations for the valence electrons of an atom?

  1. G.N. Lewis
  2. G.N. Lucas
  3. G.N. Lawson
  4. G.N. Larsen
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Correct answer: A. G.N. Lewis

1. A shorthand was needed to show the outer electrons. 2. G.N. Lewis introduced simple notations to represent valence electrons. 3. These notations are called Lewis symbols. _Source: syllabus Chemistry, Ch 4 'Chemical Bonding and Molecular Structure'_

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More Chemistry topics

Amines and BiomoleculesChemical KineticsAldehydes, Ketones and Carboxylic AcidsEquilibriumRedox ReactionsHydrocarbonsChemical Bonding and Molecular StructureSolutions