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 I – MgCl₂ is more covalent than NaCl

Statement II – Greater the charge on the cation, the greater the covalent character

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:

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 I – BF₃ has finite dipole moment

Statement II – B-F bonds are polar

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 3:

Which of the following statement is incorrect about oxygen molecule ?

Bond order of oxygen molecule is 2

Oxygen molecule is stable

Oxygen molecule is diamagnetic

There are 16 electron in oxygen molecule

Question 4:

Which of the following has zero dipole moment ?

Molecule AX₂ with linear geometry
Molecule AX₃ with trigonal planar geometry
Molecule AX₆ with octahedral geometry
Molecule AX₃ with pyramidal geometry

1,2,3

1,2,3,4

1,2

2,3,4

Question 5:

Molecular orbitals are filled in accordance with

Aufbau principle

Pauli exclusion principle

Hund’s principle

Sodifazan law

Question 6:

Molecule is stable if

Nb > Na

Nb = Na

Nb < Na

Both 1 and 3

Question 7:

Average H-O bond enthalpy for water molecule is

455.5 KJ/mol

463.5 KJ/mol

465.5 KJ/mol

464.5 KJ/mol

Question 8:

Which of the following statement in incorrect about dipole moment?

Dipole moment is a scalar quantity

Dipole moment is the product of charge and distance between the centres of positive and negative charge

It is expressed in Debye unit

It is represented by the crossed arrow

Question 9:

Correct increasing order of covalent character is

LiCl , NaCl , KCl , RbCl

RbCl , KCl , NaCl , LiCl

RbCl , NaCl , LiCl , KCl

KCl , NaCl , LiCl , RbCl

Question 10:

Which of the following statement is incorrect about ozone ?

Shape of ozone molecule is bent

O-O bond length is equal

Ozone protect us from harmful ultraviolet rays

Oxygen-oxygen bonds in the O3 molecule a single bond

NDA CHEMISTRY QUIZ - 21

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NDA CHEMISTRY QUIZ - 21

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