The spreading of fragrance or scent in air is due to_______________?

Related Mcqs:

1. When water freezes at 0°C its density decreases due to_______________?

   A. Change of bond angles
   B. Cubic structure of ice
   C. Empty space present in the structure of ice
   D. Change of bond length

2. Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?

   A. Both are electropositive
   B. Similar outer most shell electronic configuration
   C. Both form ionic compounds
   D. All

3. Ketones are comparatively less reactive than aldehdye. It is due to_______________?

   A. alkyl groups are electron donating
   B. steric hindrance
   C. Both A and B
   D. none

4. Second ionization potential of alkali metals are very high due to_______________?

   A. being s-block elements
   B. inert gas configurations
   C. ns1 electronic configuration
   D. being metals

5. The introduction of Kelvin scale in thermodynamic is according to_______________?

   A. Boyles law
   B. Charles law
   C. Daltons law
   D. Grahams law

6. When benzene is heated in air with V2O5 at 450°C yields_________________?

   A. Phenol
   B. Maleic anhydride
   C. Glyoxal
   D. Benzoic acid

7. The cooling of molten urea by air in the tower is called______________________?

   A. prilling
   B. evaporation
   C. condensation
   D. crystallization

8. Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?

   A. PdCl2
   B. Cu2Cl2
   C. CuCl2
   D. PbCl2

9. Benzene is heated in air with V2O5 at 450°C it undergoes________________?

   A. Substitution reaction
   B. Addition reaction
   C. Elimination reaction
   D. Oxidation reaction

10. Air is a/an _________?

    A. Compound
    B. Element
    C. Electrolyte
    D. Mixture

    Submitted by: Ali Mallah