NDA CHEMISTRY QUIZ

Question 1:

Directions – Question consist of two statements labelled as statement I and statement II . Examine both the statement and mark the correct choice according to the codes given below

Statement 1 –Size of $\mathrm{N}^{3-}$ is greater than nitrogen

Statement 2 – Due to increase in effective nuclear charge .

Both statement I and statement II are true and Statement II is the correct explanation of Statement I

Both statement I and statement II are true and Statement II is not the correct explanation of Statement I

Statement I is true , but statement II is false

Statement I is false , but II is true

Question 2:

The Electronic configuration of an element is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{5}$. To which group this element belongs?

s-block

p-block

d-block

f-block

Question 3:

Directions – Question consist of two statements labelled as statement I and statement II . Examine both the statement and mark the correct choice according to the codes given below

Statement 1 – Halogens have highly negative electron gain enthalpy

Statement 2 – After picking up an electron , halogens attain noble gas configuration

Both statement I and statement II are true and Statement II is the correct explanation of Statement I

Both statement I and statement II are true and Statement II is not the correct explanation of Statement I

Statement I is true , but statement II is false

Statement I is false , but II is true

Question 4:

Which of the following belongs to the same group of the periodic table.

Be – Ca
Na – Cl
B - Al
P – O

1,2

1,3

1,2,3

3,4

Question 5:

Which of the following statement is not true about isoelectronic species ?

They have same number of electrons

$\mathrm{Na}^{+}$and $\mathrm{F}^{-}$ are isoelectronic species

$\mathrm{Al}^{3+}$ and $\mathrm{Mg}^{+2}$ have same number of electrons

They belong to same element

Question 6:

Match List I and List II

A-III,B-I,C-II

A-I,B-II,C-III

A-II,B-III,C-I

A-III,B-II,C-I

Question 7:

Match list I and list II

A-II,B-IV,C-I,D-III

A-III,B-I,C-IV,D-II

A-III,B-IV,C-I,D-II

A-IV,B-III,C-I,D-II

Question 8:

Which of the following has least negative electron gain enthalpy ?

F

Cl

Br

I

Question 9:

Which of the following statement is not true?

Metallic character increase as we go down the group

Metallic character decrease along the period

Non metallic character increase along the period

Non metallic character increase down the group

NDA CHEMISTRY QUIZ - 20

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NDA CHEMISTRY QUIZ - 20

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