NDA CHEMISTRY QUIZ

Question 1:

Which of the following compound does not obey octet rule ?

SF₂
SF₄
SF₆
SO₂

1,2,3

2,3

3,4

1,4,2

Question 2:

Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Ionic bond is formed more easily with elements having

High ionization enthalpy and low negative value of electron gain enthalpy

low ionization enthalpy and low negative value of electron gain enthalpy

High ionization enthalpy and high negative value of electron gain enthalpy

low ionization enthalpy and high negative value of electron gain enthalpy

Question 3:

Match List I and List II

A-II,B-IV,C-I

A-II,B-III,C-I

A-IV,B-II,C-I

A-IV,B-III,C-I

Question 4:

Dipole moment which can be defined as the product of the magnitude of the charge and the distance between the centers of positive and negative charge. Which of the following has the least dipole moment?

C0₂

HI

H₂0

S0₂

Question 5:

Which type of bond is present between carbon and chlorine in carbon tetrachloride ?

Electrovalent bond

Covalent bond

Coordinate bond

Hydrogen bond

Question 6:

Which of the following is the odd electron species ?

NO
NO₂
PF₅
NH₃

Both 1 and 4

Both 1 and 3

Both 2 and 3

Both 1 and 2

Question 7:

Which of the following statement is not correct ?

CO₂ and SO₂ are not isostructural

BF₃ and NF₃ are not isostructural

BH₄^- and NH₄⁺ are not isostructural

CO₂ and BCl₃ are not isostructural

Question 8:

The boiling point of compounds depends to a large extent on the strength of hydrogen bond and the number of hydrogen bonds. The correct increasing order of the boiling points of above compounds is

HF > H₂0 > NH₃

H20< HF< NH3

NH3> HF> H20

NH3< H20< HF

Question 9:

Which one of the following is not the drawback of octet theory ?

This theory does not account for the shape of molecules.

It does not explain the relative stability of the molecules

Some noble gases (for example xenon and krypton) also combine with oxygen and fluorine to form a number of compounds

Sulphur also forms many compounds in which the octet rule is obeyed.

Question 10:

Which of the following condition is necessary for the formation of hydrogen bond ?

Presence of H-atom
Presence of Non metal
Presence of highly electronegative element like N , F and O attached to hydrogen atom
Presence of metal attached to hydrogen atom

1,2

1,3,4

1,3

1,4,2

NDA CHEMISTRY QUIZ - 23

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NDA CHEMISTRY QUIZ - 23

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