JEE Main 2019 (Online) 12th April Evening Slot | Periodic Table & Periodicity Question 76 | Chemistry

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JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

-1

Among the following, the energy of 2s orbital is lowest in :

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

-1

The pair that has similar atomic radii is :

Mo and W

Mn and Re

Ti and Hf

Sc and Ni

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

-1

In comparison to boron, berylium has :

lesser nuclear charge and greater first ionisation enthalpy

greater nuclear charge and greater first ionisation enthalpy

greater nuclear charge and lesser first ionisation enthalpy

lesser nuclear charge and lesser first ionisation ethalpy

JEE Main 2019 (Online) 12th April Morning Slot

MCQ (Single Correct Answer)

-1

The correct sequence of thermal stability of the following carbonates is :

BaCO₃ < SrCO₃ < CaCO₃ < MgCO₃

MgCO₃ < CaCO₃ < SrCO₃ < BaCO₃

BaCO₃ < CaCO₃ < SrCO₃ < MgCO₃

MgCO₃ < SrCO₃ < CaCO₃ < BaCO₃

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