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Chemistry Class 12 Chapter 16
Environmental Chemistry
Test 7
1.
Both aldehydes and ketones can be represented by the general formula?
C
n
H
2n+1
O
C
n
H
2n+2
O
C
n
H
2n+2
O
2
C
n
H
2n
O
2.
Which alkene on reductive ozonolysis gives acetaldehyde as a product?
1-butene
2-butene
Isobutylene
Propene
3.
The least reactivity of aldehyde towards nucleophilic attack among the following is?
HCHO
C
6
H
5
CHO
CH
3
CH
2
CHO
CH
3
CHO
4.
Which is the correct order of increasing boiling point in the following series?
Ethanol>acetone>proponal>methanal
Ethanal<acetone<propanal<methanal
Methanal<ethanol<propanal<acetone
Acetones>ethanol>methanal>propanal
5.
Which ketone will yield tertiary butyl alkyl alcohol on treatment with CH
3
MgBr following by hydrolysis?
2-butanone
2-pentanone
Acetone
3-pentanone
6.
Fehling solution is?
Acidified KMnO
4
None of these
Copper sulphate and Rochells salt+ NaOH
Amonical cuprous chloride solution
7.
Which test is only shown by ketones?
Tollen’s test
Sodium nitroprosside test
Benedict’s solution test
Fehiling solution test
8.
Which of the following reagent can be provide distinction between propionaldehyde and acetaldehyde?
Sodium hypochlorite
Schiff’s reagent
Fehiling solution
Tollen’s reagent
9.
The oxidation product of ethanol is treated first with calcium and then subjected to distillation under dry condition, the final product is?
Ethanol
Methanol
Acetone
Acetic acid
10.
Aldehydes are first oxidation of?
Tertiary alcohol
Primary alcohol
Dihydric alcohol
Secondary alcohol
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