For electron gain enthalpies of the elements denoted as Δ eg H , the incorrect option is :

Δ eg H ( Te ) < Δ eg H ( Po )

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The first ionization energy of magnesium is smaller, as compared to that of elements $X$ and $Y$ , but higher than that of $Z$ . The elements $X, Y$ and $Z$ , respectively, are :

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Important Questions on Classification of Elements and Periodicity in Properties

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main 18 March 2021 Shift 1>Q 2

The ionic radius of

{Na}^{+}

ions is

1.02 \overset{°}{A} .

The ionic radii (in

\overset{°}{A}

) of

{Mg}^{2 +}

and

{Al}^{3 +},

respectively, are

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main 17 March 2021 Shift 2>Q 3

The set of elements that differ in mutual relationship from those of the other sets is:

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main 17 March 2021 Shift 1>Q 4

The absolute value of the electron gain enthalpy of halogens satisfies:

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main 16 March 2021 Shift 2>Q 5

Identify the elements $X$ and $Y$ using the ionization energy values given below :

$\begin{matrix} Ionization energy & (kJ / mol) \\ 1^{st} & 2^{nd} \\ X & 495 & 4563 \\ Y & 731 & 1450 \end{matrix}$

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main 16 March 2021 Shift 2>Q 6

The characteristics of elements

X, Y

and

Z

with atomic numbers, respectively,

33, 53

and

83

are:

HARD

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 9th January 2020 Shift 1>Q 7

B

has a smaller first ionization enthalpy than

B e

. Consider the following statement:
(I) it is easier to remove

2 p

electron than

2 s

electron
(II)

2 p

electron of

B

is more shielded from the nucleus by the inner core of electrons than the

2 s

electrons of

B e

(III)

2 s

electron has more penetration power than

2 p

electron
(IV) atomic radius of

B

is more than

B e

(atomic number

B : 5, B e = 4

)
The correct statements are.

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 9th January 2020 Shift 1>Q 8

The acidic, basic and amphoteric oxides, respectively, are

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Classification of Elements and Periodicity in Properties>JEE Main - 9th January 2020 Shift 1>Q 9

The electronic configurations of bivalent europium and trivalent cerium are:
(atomic number:

X e = 54

C e = 58

E u = 63)

The first ionization energy of magnesium is smaller, as compared to that of elements X and Y, but higher than that of Z. The elements X, Y and Z, respectively, are :

Important Questions on Classification of Elements and Periodicity in Properties

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The first ionization energy of magnesium is smaller, as compared to that of elements $X$ and $Y$ , but higher than that of $Z$ . The elements $X, Y$ and $Z$ , respectively, are :