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

Related Mcqs:

1. Formalin is ___________ solution of formaldehyde in water?

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

2. Methyl alcohol is not used as___________________?

   A. a solvent
   B. an anti freezing agent
   C. a substitute for petrol
   D. for denaturing of ethyl alcohol

3. Methyl alcohol is not used__________________?

   A. As a solvent
   B. As an antifreezing agent
   C. As a substitute for petrol
   D. For denaturing of ethyl alcohol

4. 10ml of alcohol dissolve in 90ml of water unit of concentration used is________________?

   A. % w/w
   B. % w/v
   C. % v/v
   D. % v/w

5. 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

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

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

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

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

8. 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

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

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

   Submitted by: Said wali shah

10. Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage ?

    A. Lime (CaO)
    B. Silica (SiO2)
    C. Alumina (Al2O3)
    D. Magnesia (MgO)