Formaldehyde on condensation in the presence of calcium hydroxide: ______________?

Related Mcqs:

1. Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?

   A. Nylon 66
   B. urotropine
   C. Aniline formaldehyde plastic
   D. Bakelite

2. Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?

   A. oxidation
   B. elimination
   C. condensation polymerization
   D. additional polymertization

3. Percentage of calcium in calcium carbonate is___________________?

   A. 80%
   B. 30%
   C. 40%
   D. 20%

4. 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

5. What is the Chemical formula of Zinc Hydroxide _________ ?

   A. Zn(OH)2
   B. ZNO2
   C. Zn2(OH)3
   D. ZnOH

   Submitted by: Rashid Mehmood

6. Which of the following is not a use of formaldehyde ?

   A. in silvery mirror
   B. in making medicine urotropine
   C. in making throat lozenges
   D. in making acetic acid

7. Formalin is ___________ solution of formaldehyde in water?

   A. 10%
   B. 20%
   C. 40%
   D. 60%

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

   A. formamint
   B. lactomint
   C. aldomint
   D. formalactose

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

   A. 60%
   B. 50%
   C. 52%
   D. 8%

10. Which of the following do not give aldol condensation reactions ?

    A. formaldehyde
    B. acetaldehyde
    C. diemthyl ketone
    D. propionaldehyde