Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 30

EASY

JEE Main

IMPORTANT

Earn 100

Among the elements $Br, Al, Cs$ and $Xe,$ the unknown element at the time of Mendeleev's was ______.

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Important Questions on Classification of Elements and Periodicity in Properties

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 31

The element that belongs to the representative group of elements in the periodic table is:

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 32

Which set includes atomic numbers of elements having the same valency?

EASY

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 33

Which of the following element has the maximum, first ionisation potential?

EASY

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 34

Fluorine is more electronegative than nitrogen. The best explanation is that

EASY

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 35

The first ionisation enthalpies for three elements are

1314, 1680

and

2080 kJ {mol}^{- 1}

, respectively. The correct sequence of the elements is:

EASY

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 36

The electronic configuration of an element with the largest difference between the

1^{st}

and

2^{nd}

ionization energies is:

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 37

The energy evolved is the highest for which of the following reactions?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 8 - Classification of Elements and Periodicity in Properties>Level 1>Q 38

Choose the species with the highest electron affinity: