CBSE
Multiple Choice QuestionsAssertion : Haemoglobin is an oxygen carrier.
Reason : Oxygen binds as O2- to Fe of haemoglobin.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true and the reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
The paramagnetic behaviour of B2 is due to the presence of:
two unpaired electrons in MO
two unpaired electrons in MO
two unpaired electrons in MO
two unpaired electrons in MO
Assertion: Diamond is a bad conductor.
Reason: Graphite is a good conductor.
If both assertion and reason are true and reason is a correct explanation of the assertion.
If both the assertion and reason are true but the reason is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both the assertion and reason are false.
Assertion : Alcohols are dehydrated to hydrocarbons in the presence of acidic zeolites.
Reason : Zeolites are porous catalysts.
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 reaction of methyltrichloroacetate (Cl3CCO2Me) with sodium methoxide (NaOMe) generates
carbocation
carbene
carbanion
carbon radical
Which of the following structure is similar to graphite?
BN
B
B4C
B2H6
Among Be, B, Mg and Al, the second ionisation potential is maximum for
B
Be
Mg
Al
Which of the following imparts green colour to the burner flame?
B(OMe)3
Na(OMe)
Al(OPr)3
Sn(OH)2
The ligand called acid is
CO
NH3
C2O
ethylene diamine
Hardest compound of boron is
magnesium boride
aluminium boride
boron nitride
boron carbide
