Chemistry-
General
Easy
Question
Assertion : F atom has a less negative electron affinity than 
atom
Reason : Additional electrons are repelled more effectively by 3p electrons in atom than by 2p electrons in 
atom
- If both assertion and reason are true and the reason is the correct explanation of the assertion.
- If both assertion and reason are true but reason is not the correct explanation of the assertion.
- If assertion is true but reason is false.
- If the assertion and reason both are false.
The correct answer is: If assertion is true but reason is false.
The lower value of electron affinity of F is due to electron-electron repulsion in 2-p orbitals of F-atom is stronger.
Related Questions to study
Chemistry-
Assertion : 
is predominantly a covalent compound
Reason : Electronegativity difference between 
and Cl is too small
Assertion : is predominantly a covalent compound
Reason : Electronegativity difference between and Cl is too small
Chemistry-General
Chemistry-
Assertion: The first ionization energy of Be is greater than that of B
Reason: 2p orbital is lower in energy than 2s of
Assertion: The first ionization energy of Be is greater than that of B
Reason: 2p orbital is lower in energy than 2s of
Chemistry-General
Chemistry-
Assertion : The atomic radii of calcium is smaller than sodium.
Reason : Calcium has a lower nuclear charge than sodium
Assertion : The atomic radii of calcium is smaller than sodium.
Reason : Calcium has a lower nuclear charge than sodium
Chemistry-General
Chemistry-
Assertion: Dinegative anion of oxygen 
is quite common but dinegative anion of sulphur 
is less common
Reason: Covalency of oxygen is two
Assertion: Dinegative anion of oxygen is quite common but dinegative anion of sulphur is less common
Reason: Covalency of oxygen is two
Chemistry-General
Chemistry-
Assertion : Positive ions will be wider than parent atoms
Reason : Nuclear charge pulls them closer
Assertion : Positive ions will be wider than parent atoms
Reason : Nuclear charge pulls them closer
Chemistry-General
Chemistry-
In which block 106th element belongs
In which block 106th element belongs
Chemistry-General
Chemistry-
Which of the following have high electron affinity
Which of the following have high electron affinity
Chemistry-General
Chemistry-
Ionic radii of
Ionic radii of
Chemistry-General
Chemistry-
Arrange F, Cl, O, N in the decreasing order of electronegativity
Arrange F, Cl, O, N in the decreasing order of electronegativity
Chemistry-General
Chemistry-
Which element having following electronic configurations has minimum ionization potential
Which element having following electronic configurations has minimum ionization potential
Chemistry-General
Chemistry-
A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration
A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration
Chemistry-General
Chemistry-
Which is the correct order of ionic sizes (At. No. : Ce = 58, Sn = 50, Yb = 70 and Lu = 71)
Which is the correct order of ionic sizes (At. No. : Ce = 58, Sn = 50, Yb = 70 and Lu = 71)
Chemistry-General
Chemistry-
The elements which occupy the peaks of ionisation energy curve, are
The elements which occupy the peaks of ionisation energy curve, are
Chemistry-General
Chemistry-
The first ionization potentials in electron volts of nitrogen and oxygen atoms are respectively given by
The first ionization potentials in electron volts of nitrogen and oxygen atoms are respectively given by
Chemistry-General
Chemistry-
Which of the following configurations represents atoms of the elements having the highest second ionization energy
Which of the following configurations represents atoms of the elements having the highest second ionization energy
Chemistry-General
