Formalin is ___________ solution of formaldehyde in water?

Related Mcqs:

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

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

2. 58.5g of of NaCl per 1 dm3 of solution of NaCl in water the concentration of solution will be___________________?

   A. 0.1 M
   B. 1 m
   C. 1 M
   D. 0.1 N

3. 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

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

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

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

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

6. 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

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

   A. Formose 
   B. Fructose
   C. Maltose
   D. Xylose

   Submitted by: Said wali shah

8. Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?

   A. 0.0002M HCI
   B. 0.2 mole of NaCI with 0.2 mole of HNO3
   C. 0.4 mole of CH3COOH with 0.4 mole of NaOH
   D. 0.4 mole of NH3 with 0.2 mole of HCI

9. 1 molar solution of glucose in water contains weight of glucose________________?

   A. 180g/dm3
   B. 170g/dm3
   C. 190g/dm3
   D. 195g/dm3

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

    A. pink
    B. black
    C. yellow
    D. brick red