JEE Main 2019 (Online) 10th January Morning Slot | Periodic Table & Periodicity Question 94 | Chemistry

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JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

-1

The electronegativity of aluminium is similar to :

Beryllium

Carbon

Boron

Lithium

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

-1

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :

increase in atomic radii and decrease in ionic radii

increase in both atomic and ionic radii

decrease in both atomic and ionic radii

decrease in atomic radii and increase in ionic radii

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

When the first electron gain enthalpy $$\left( {{\Delta _{eg}}H} \right)$$ of oxygen is $$-$$ 141 kJ/mol, its second electron gain enthalpy is :

a more negative value than the first

almost the same as that of the first

negative, but less negative than the first

a positive value

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

-1

In general, the properties that decrease and increase down a group in the periodic table, respectively, are :

Atomic Radius and Electronegativity

Electron Gain Enthalpy and Electronegativity.

Electronegativity and Atomic Radius.

Electronegativity and Electron Gain Enthalpy.

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