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Byju's Answer

Standard XII

Chemistry

Uses of Alkali Metals

First and sec...

Question

First and second I.E. of few elements given below:

I.E $_{1}$ (kJ/mole)
I.E. $_{2}$ (kJ/mole)
(A)
520
730
(B)
1680
3380
(C)
2370
5250
Identify the above as alkaline earth metal, reactive non-metal and a noble gas?

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Solution

As (A) has first Ionization enthalpy around $520$ , it can be classified as alkaline earth metal moreover, the rise in its second I.E. suggest that it is alkaline earth metal because after removing one $e^{-}$ it increases.
Now, (B) has its first I.E. around $1680$ but its second I.E. $≃ 3380$ , which is not that much high than the case of (C) hence, we will conclude that (B) is reactive non-metal and (C) is noble gas because of its enormous first & second I.E..

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Similar questions

Q. The

{(I E)}_{1}

an dthe

{(I E)}_{2}

in kJ

{m o l}^{- 1}

of few elements designated by Roman numerals are shown below:

Element

{(I E)}_{1}

{(I E)}_{2}

1 2372 5251 2 520 7300 3 900 1760 4 1680 3380 Which of the above elements is likely to be a (a) reactive metal (b) reactive non-metal (c) noble gas (d) metal that forms a stable binary halide of the

{A X}_{2}

Write the sequence of your answer.

Q. The

(I E_{1})

and the

(I E_{2})

k J m o l^{- 1}

of a few elements designated by Roman numerals are shown below:

\begin{matrix} I & I I I E_{1} & 400 & 589 I E_{2} & 2510 & 1120 \end{matrix}

Elements

I

and

I I

respectively are likely to be?

Q. The first

(Δ_{i} H_{1})

and the second

(Δ_{i} H_{2})

ionization enthalpies (in kJ mol

^{- 1}

) and the

(Δ_{e g} H)

electron gain enthalpy (in kJ mol

^{- 1}

) of a few elements are given below:

Elements	$Δ H_{1}$	$Δ H_{2}$	$Δ_{e g}$ H
I	520	7300	-60
II	419	3051	-48
III	1681	3374	-328
IV	1008	1846	-295
V	2372	5251	+48
VI	738	1451	-40

Which of the above elements is likely to be :
(a) the least reactive element,
(b) the most reactive metal,
(c) the most reactive non-metal,
(d) the least reactive non-metal,
(e) the metal which can form a stable binary halide of the formula MX

_{2}

(X=halogen) and
(f) the metal which can form a predominantly stable covalent halide of the formula MX (X=halogen)?

Q. The

I . E ._{1}

and the

I . E ._{2}

k J m o l^{- 1}

of a few elements designated by P, Q, R, S are shown

Atom	$I . E ._{1}$	$I . E ._{2}$
A	2372	5251
B	520	7300
C	900	1760
D	1680	3380

Based on above information, Which of the element is likely to be reactive metal?

Q. The first (

Δ H_{1}

) and second (

Δ H_{2}

) ionisation enthalpies (in

k J m o l^{- 1}

) and the electron gain enthalpy (

Δ_{e g} H

) (in

k J m o l^{- 1}

) of the elements I, II, III, IV and V are given below:

Element	$Δ_{1} H_{1}$	$Δ_{1} H_{2}$	$Δ_{e g} H$
I	520	7300	-60
II	419	3051	-48
II	1681	3374	-328
IV	1008	1846	-295
V	2372	5251	+48

The most reactive metal and the least reactive non-metal of these are respectively.

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	I.E $_{1}$ (kJ/mole)	I.E. $_{2}$ (kJ/mole)
(A)	520	730
(B)	1680	3380
(C)	2370	5250

First and second I.E. of few elements given below:I.E1 (kJ/mole)I.E.2 (kJ/mole)(A)520730(B)16803380(C)23705250Identify the above as alkaline earth metal, reactive non-metal and a noble gas?

First and second I.E. of few elements given below:

I.E $_{1}$ (kJ/mole)
I.E. $_{2}$ (kJ/mole)
(A)
520
730
(B)
1680
3380
(C)
2370
5250
Identify the above as alkaline earth metal, reactive non-metal and a noble gas?