CBSE
Multiple Choice QuestionsIonic compounds are formed most easily with :
low electron affinity , high ionisation energy
high electron affinity , low ionisation energy
low electron affinity , low ionisation energy
high electron affinity , high ionisation energy
Heisenberg's uncertainty principle can be explained as :
x
x x p
x x p
p
The correct order of dipole moment is
CH4 <NF3 <NH3 <H2O
NF3 <CH4 <NH3 <H2O
NH3 <NF3 <CH4 <H2O
H2O <NH3 <NF3 <CH4
Hydrofluoric acid shows hydrogen bonding due to :
high electron affinity of fluorine
high bond dissociation energy of fluorine
high electronegativity of fluorine
none of the above
Assertion: The S-S-S bond angle in S8 molecule is 105°.
Reason : S8 has a V-shape.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
The bond energy is the energy required to :
dissociate one mole of the substance
dissociate bond in 1 kg of the substance
break one mole of similar bonds
break bonds in one mole of the substance
Which of the following is paramagnetic ?
N2
C2
N2+
O22-
Assertion : Sodium formate has both the C-O bonds have same value 1.27Å.
Reason : Equal bond length is due to the phenomenon of resonance.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
What is binding energy in nucleus , if mass is 0.08181 amu ?
1.2 x 10-4 erg/nucleus
8.2 x 10-4 erg/nucleus
10.2 x 10-4 erg/nucleus
1.9 x 10-4 erg/nucleus
The order of bond length is
O2 < O3 < O
O2 < O < O3
O < O3 < O2
O2 = O > O3
