Chemistry Mcqs

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

• (A)  carbonic acid
• (B)  ethanol
• (C)  acetic acid
• (D)  methanoic acid

Answer

Submitted By :Ali Uppal

Aldehyde and ketone have same general formula for homologous series_________________?

• (A)  CnH2nO2n
• (B)  CnH2n
• (C)  CnH2nO
• (D)  CnH2nOn+1

Answer

Submitted By :Ali Uppal

On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?

• (A)  pink
• (B)  black
• (C)  yellow
• (D)  brick red

Answer

Submitted By :Ali Uppal

Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?

• (A)  60%
• (B)  50%
• (C)  52%
• (D)  8%

Answer

Submitted By :Ali Uppal

Formula of haloform is_________________?

• (A)  HCOX
• (B)  CX4
• (C)  CHX3
• (D)  CH3X

Answer

Submitted By :Ali Uppal

Formaldehyde and lactose are combined to produce throat lozenges named as__________________?

• (A)  formamint
• (B)  lactomint
• (C)  aldomint
• (D)  formalactose

Answer

Submitted By :Ali Uppal

Which of the following do not give aldol condensation reactions ?

• (A)  formaldehyde
• (B)  acetaldehyde
• (C)  diemthyl ketone
• (D)  propionaldehyde

Answer

Submitted By :Ali Uppal

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

• (A)  Grignard reagent
• (B)  Tollens reagent
• (C)  Fehlings reagent
• (D)  Benedicts reagent

Answer

Submitted By :Ali Uppal

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

• (A)  nucleophile addition
• (B)  polymerization
• (C)  oxidation
• (D)  all of the above

Answer

Submitted By :Ali Uppal

Acetone reacts with HCN to form a cyanohydrin. It is an example of________________?

• (A)  electronphilic addition
• (B)  electrophilic substitution
• (C)  nucleophilic addition
• (D)  nucleophilic substitution

Answer

Submitted By :Ali Uppal