Safe and the most reliable method of drying crystals is through_________________?

Related Mcqs:

1. A safe and more reliable method for drying the crystal is__________________?

   A. Hot air currents
   B. folds of filter paper
   C. oven
   D. Vacuum desiccator

2. Arsenic oxides are removed by passing through_________________?

   A. Ferric hydroxide
   B. Sodium hydroxide
   C. Calcium hydroxide
   D. Aluminium hydroxide

3. Covalent network crystals have_____________?

   A. higher melting point then molecular crystals
   B. lower melting point then molecular crystals
   C. discrete molecules linked by Van der waals forces
   D. hydrogen bonding

   Submitted by: Mansoor Ul Haque

4. Metallic crystals are soluble in________________?

   A. Polar solvent
   B. Non polar solvent
   C. Fused metal
   D. None

5. The solution remaining after the formation of crystals is called ___________________?

   A. Mother liquor
   B. Dilute solution
   C. Residue
   D. both A & B

6. Crystals of Na2CO3. 10H2O when exposed to air_________________?

   A. Lose water and remain solid
   B. Gain water and remain solid
   C. Gain water and become liquid
   D. Remains unchanged

7. Aqueous solution of borax above 62°C gives crystals of________________?

   A. Na2B4O7.4H2O
   B. Na2B4O7.5H2O
   C. Na2B4O7.2H2O
   D. Na2B4O7.10H2O

8. Linds method is employed for__________________?

   A. Separation of gases
   B. Expansion of gases
   C. Compression of gases
   D. Liquefaction of gases

9. By which method the molecular mass of benzene was determined as 78.108 ?

   A. Specific gravity method
   B. Vapour density method
   C. X-ray diffraction method
   D. Distillation methos

10. The best method of preparation of alkyl halides is a reaction of alcohol with__________________?

    A. Zn / HCI
    B. SOCl2 / Pyridine
    C. PCI3
    D. PCI5