The number of peaks obtained in mass spectrometry shows____________________?

Related Mcqs:

1. The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?

   A. 2.05 gram
   B. 3.05 gram
   C. 4.05 gram
   D. 5.05 gram

   Submitted by: Muhammad Ali Kunbhar

2. Mass spectrometer is used to determine Mass number of isotopes and___________________?

   A. Atomic number
   B. Relative abundance
   C. Electronic configuration
   D. All of the above

3. A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?

   A. 74% Fe
   B. 75% Fe
   C. 77% Fe
   D. 78% Fe

   Submitted by: Muhammad Ali Kunbhar

4. When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained ?

   A. 1
   B. 2
   C. 3
   D. 4

5. When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?

   A. phenol is unsaturated
   B. 2-bromophenol is insoluble in water
   C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack
   D. acid-base reaction

6. When electron jump into orbit 1 then series obtained is___________________?

   A. Lyman
   B. Paschen
   C. Pfund
   D. Brackett

7. Acetic anhydride can be obtained by treating ethyl alcohol with___________________?

   A. P2O5
   B. H2SO4
   C. Both A and B
   D. PCI5

8. Methanol can be obtained from_________________?

   A. water gas
   B. destructive distillation of wood
   C. methane
   D. all

9. Absolute alcohol is obtained when rectified spirit is treated with__________________?

   A. Ca(OH)2
   B. CaCO3
   C. CaCl2
   D. CaO

10. The metallurgical process in which a metal is obtained in a fused state is called__________?

    A. smelting
    B. roasting
    C. calcinations
    D. froth floatation

    Submitted by: Muhammad Ali Kunbhar