Physics-
General
Easy
Question
Assertion :Ionization potential across the period is Na < Al < Mg < Si.
Reason : Ionization potential decreases with decrease in atomic size.
- 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.
Assertion is true but reason is false.
Ionisation potential decreases with increase in atomic size and also for a given a shell. I.E. is in given order.
Related Questions to study
Physics-
Assertion :Shielding effect increases as we go down the group.
Reason : More is the number of electrons in the penultimate shell, more is shielding.
Assertion :Shielding effect increases as we go down the group.
Reason : More is the number of electrons in the penultimate shell, more is shielding.
Physics-General
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Assertion :Ionization enthalpy is always negative.
Reason : Energy is always released when electrons are removed.
Assertion :Ionization enthalpy is always negative.
Reason : Energy is always released when electrons are removed.
Physics-General
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Assertion :Chemistry of Actinoids is more complicated than Lanthanoids.
Reason : Actinoid elements are radioactive.
Assertion :Chemistry of Actinoids is more complicated than Lanthanoids.
Reason : Actinoid elements are radioactive.
Physics-General
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Assertion :Atomic number of the element ununbium is 112.
Reason : Name for digits 1 and 2 is un-and bi-respectively in latin words.
Assertion :Atomic number of the element ununbium is 112.
Reason : Name for digits 1 and 2 is un-and bi-respectively in latin words.
Physics-General
Chemistry-
Assertion :The first ionisation energy of Be is greater than boron [AIIMS 2002]
Reason : 2p orbitals have lower energy than 2s orbitals.
Assertion :The first ionisation energy of Be is greater than boron [AIIMS 2002]
Reason : 2p orbitals have lower energy than 2s orbitals.
Chemistry-General
Chemistry-
Assertion :Noble gases have maximum electron affinity.
Reason : High electron affinity shows that the electron is loosely bonded to the atom.
Assertion :Noble gases have maximum electron affinity.
Reason : High electron affinity shows that the electron is loosely bonded to the atom.
Chemistry-General
Chemistry-
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
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
Chemistry-General
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
