The mass of decimole of electrons (NA) is___________________?

Related Mcqs:

1. 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

2. 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

3. What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ?

   A. 6
   B. 4
   C. 3
   D. 2

4. When electrons collide with heavy metals than ___________ are produced?

   A. Beta-rays
   B. Alpha-rays
   C. X-rays
   D. Gamma-rays

5. The relative attraction of the nucleus for the electrons in a chemical bond is called _________________?

   A. Ionization energy
   B. Electron affinity
   C. Electro negativity
   D. None of the above

6. In Galvanic cell electrons flow from anode to cathode through__________________?

   A. external electric circuit
   B. salt bridge
   C. movement of ions
   D. all of the above

7. The specie which donates electrons to central metal atom in coordination sphere is called____________________?

   A. anion
   B. cation
   C. Ligand is positively charged
   D. acid

8. How many electrons are there in benzene to form delocalized electron cloud________________?

   A. 3
   B. 4
   C. 6
   D. 8

9. In unsaturated hydrocarbons electrons favour___________________?

   A. less reactivity
   B. addition reactions
   C. substitution reactions
   D. none

10. Reactivity due to pi-electrons is present in_________________?

    A. alkane
    B. alkene
    C. alkyne
    D. both B & C