CBSE
Multiple Choice QuestionsEssential compound to manufacture acrolin is :
glycerol
benzene
phenol
ammonia
In photography , sodium thiosulphate is used as :
complexing agent
oxidising agent
reducing agent
none of these
Which of the following reactions will not give propane ?
CH3CH2CH2Cl
CH3COCl
CH3CH=CH2
CH3-C(OH)-CH3
Iodoform test is not given by :
HCHO
CH3CHO
CH3COCH3
C2H5OH
Benedict's solution is not reduced by :
formaldehyde
acetaldehyde
glucose
acetic anhydride
Assertion : Cyclohexanone exhibits keto-enol tautomerism.
Reason : In cyclohexanone, one form contains the keto group (>C=O) while other contains enolic group (- C=C- OH).
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.
HCHO reacts with NH3 togive :
urotropine
bakelite
teryline
gylaptal
Assertion : Benzaldehyde is more reactive than ethanal towards nucleophilic attack.
Reason : The overall effect of -I and +R effect of phenyl group decreases the electron density on the carbon of C=O atom group in benzaldehyde.
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.
Assertion : Acetamide has more polar -CO group than in ethyl acetoacetate.
Reason : H2 is more electron donating than C2H5.
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.
A compound A ➔ C5H10Cl2 on hydrolysis gives C5H10O which reacts with NH2OH forms iodoform , but does not give Fehling test A is :
