Chemistry/Chemistry MCQ Question - Aldehydes and Ketones Sample Test,Sample questions

Question:
Acetal on acid hydrolysis generates

1.Alcohol

2.Ketone

3.Both a & b

4.None of the above


Question:
Acetaldehyele cyanohydrin on acid hydrolysis yields

1.Tartaric acid

2.Propanoic acid

3.Lactic acid

4.Valeric acid


Question:
Acetone reacts with HCN to form a cyanohydrin. It is an example of

1.electronphilic addition

2.electrophilic substitution

3.nucleophilic addition

4.nucleophilic substitution


Question:
Addition of urea to the soil is _________ reaction.

1.endothermic

2.exothermic

3.both a and b

4.no heat energy is involved


Question:
Aldehyde and ketone have same general formula for homologous series

1.CnH2nO2n

2.CnH2n

3.CnH2nO

4.CnH2nOn+1


Question:
Aldehydes are reduced to

1.P? alcohol

2.S? alcohol

3.T? alcohol

4.Not possible


Question:
Argillaceous material does not include

1.vlay

2.marine shells

3.slate

4.blast furnace slag


Question:
Calcarious material includes

1.lime stone

2.marble

3.chalk

4.all of the above


Question:
Cannizaros reaction takes place through the transfer of _______ from complex anion.

1.hydrogen ion

2.hydride ion

3.oxide ion

4.methoxide ion


Question:
Cannizzaros reaction is not given by

1.formaldehyde

2.acetaldehyde

3.benzaldehyde

4.trimethyl acetaldehyde


Question:
DAP (Diammonium hydrogen phosphate) contains _________ plant nutrients.

1.60%

2.65%

3.70%

4.75%


Question:
Dry distillation of calcium acetate results in the formation of

1.formaldehyde

2.acetaldehyde

3.methane

4.acetone


Question:
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _____ as promoter

1.PdCl2

2.Cu2Cl2

3.CuCl2

4.PbCl2


Question:
For aldol condensation the conditions necessary

1.?-C

2.?-H

3.Basic medium

4.All


Question:
Formaldehyde and lactose are combined to produce throat lozenges named as

1.formamint

2.lactomint

3.aldomint

4.formalactose


Question:
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield

1.Nylon 66

2.urotropine

3.Aniline formaldehyde plastic

4.Bakelite


Question:
Formalin consists of mixture of formaldehyde methyl alcohol and water. Percentage of water in it is

1.60%

2.50%

3.52%

4.8%


Question:
Formalin is _______ % solution of formaldehyde in water

1.10%

2.20%

3.40%

4.60%


Question:
Formula of haloform is

1.HCOX

2.CX4

3.CHX3

4.CH3X


Question:
In base catalyzed reaction of carbonyl compound the catalyst

1.increases the nucleophilic character of reagent

2.increases electrophilic character of carbonyl compound

3.acidic character of reagent

4.both a and b


Question:
Iodoform test can be used to distinguish between

1.ethanol and methanol

2.acetaldehyde and methanal

3.acetone and diethyl ketone

4.all of the above


Question:
Ketones are comparatively less reactive than aldehdye. It is due to

1.alkyl groups are electron donating

2.steric hindrance

3.both (a) and (b)

4.none


Question:
Ncleophilic addition reactions are catalysed

1.Acid

2.Base

3.Both a and b

4.None


Question:
On heating aldehydes with Fehlings solution we get a precipitate whose colour is

1.pink

2.black

3.yellow

4.brick red


Question:
Oxidation of primary alcohol gives

1.ketone

2.Aldehyde

3.Alkene then - COOH

4.Ester


Question:
Tetrahydroborate ion is the source of

1.proton

2.H+

3.both a & b

4.H-


Question:
The carbon atom of carbonyl group is

1.sp hybridized

2.sp2 hybridized

3.cp3 hybridized

4.dsp2 hybridized


Question:
The cooling of molten urea by air in the tower is called

1.prilling

2.evaporation

3.condensation

4.crystallization


Question:
The fertility of the soil is improved by

1.Rotation of the crops

2.Adding lime to the acid salts

3.Adding manure and growing legumes

4.All


Question:
The fertilizers which provide single nutrient from NPK are called ______ fertilizer.

1.straight

2.compound

3.both a and b

4.none of the above


Question:
Which of the following aldehydes shows rapid reaction with sodium nitroprusside?

1.formaldehyde

2.accetaldehyde

3.benzaldehyde

4.acetone


Question:
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide?

1.carbonic acid

2.ethanol

3.acetic acid

4.methanoic acid


Question:
Which of the following compounds will react with Tollens reagent?

1.CH3-CHO

2.CH3-CH-CH3

3.CH3-COOH

4.CH3-CO-CH2-CH3


Question:
Which of the following do not give aldol condensation reactions?

1.formaldehyde

2.acetaldehyde

3.diemthyl ketone

4.propionaldehyde


Question:
Which of the following fertilizers is not useful for paddy rice?

1.urea

2.DAP

3.Ammonium sulphate

4.Ammonium nitrate


Question:
Which of the following is a symmetrical ketone

1.3 - hexanone

2.acetone

3.butanone

4.2-pentanone


Question:
Which of the following is incorrect statement about nitrogen importance?

1.It enhances plant growth

2.It is involved in the synthesis of protein and nucleic acids

3.it accelerates fruits and flowers growth

4.It is involved in the chlorophyll synthesis


Question:
Which of the following is macronutrient?

1.Cu

2.Cl

3.H

4.Zn


Question:
Which of the following is not a use of acetaldehyde?

1.formation of phenolic resins

2.formation of mirror

3.antiseptic inhalant

4.formation of throat lozenges


Question:
Which of the following is not a use of formaldehyde?

1.in silvery mirror

2.in making medicine urotropine

3.in making throat lozenges

4.in making acetic acid


Question:
Which of the following is the most suitable catalyst for ammonia synthesis?

1.Pt

2.ZnO + Cr2O3

3.Fe in fused mixture of Al2O3 + SiQ2 + MgO

4.All of the above


Question:
Which of the following potassium fertilizers are more useful for horticultural crops tobacco & potatoes?

1.KCI

2.KNO3

3.K2SO4

4.KMnO4


Question:
Which of the following reaction is not shown by ketones?

1.reaction with HCN

2.reaction with NaHSO3

3.reaction with 2 4 dinitrophenyl hydrazine

4.reaction with Fehling solution


Question:
Which of the following reactions may be assoclated with aldehyde and ketone?

1.nucleophile addition

2.polymerization

3.oxidation

4.all of the above


Question:
Which of the following reagents will react with both aldehydes and ketones?

1.Grignard reagent

2.Tollens reagent

3.Fehlings reagent

4.Benedicts reagent


Question:
Which of the following substance produce acetaldehyde on dry distillation?

1.(CH3COO)2Ca

2.(HCOO)2Ca

3.both (a) and (b)

4.none


Question:
Which of the following substances does not give iodoform test?

1.acetaldehyde

2.ethyl alcohol

3.methyl alcohol

4.acetone


Question:
Which of the following will have the highest boiling point?

1.methanal

2.ethanal

3.propanal

4.hexanone


Question:
Which of the following will not give addition reaction with NaHSO3

1.HCHO

2.CH3CHO

3.CH3-CH2-CHO

4.None of the above


Question:
Which one exhibits aldol condensation

1.HCHO

2.C6H5CHO

3.Cl3CCHO

4.CH3COCH3


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