In K2Cr2O7 the oxidation number of chromium is____________________?

Related Mcqs:

1. Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?

   A. Toluene
   B. Ethyl benzene
   C. n-propyl benzene
   D. All

2. K2Cr2O7/H2SO4 generate____________________?

   A. Oxygen
   B. Hydrogen
   C. Nascent oxygen[O]
   D. Nascent hydrogen[H]

3. Which has maximum oxidation number ?

   A. N
   B. Cr
   C. S
   D. Mn

4. Decrease in oxidation number is called__________________?

   A. oxidation
   B. reduction
   C. oxidation-reduction
   D. all of above represent same entity

5. The oxidation number of central metal atom in [Ni(CO)4] is_________________?

   A. 0
   B. 2
   C. 4
   D. 6

6. The oxidation state of transition elements is usually _______________________?

   A. variable
   B. constant
   C. single
   D. infinite

7. Oxidation state of an atom represents____________________?

   A. Number of electrons gained
   B. Number of electrons lost
   C. Apparent charge in compound
   D. Its vacancies

8. In which compound of Xenon the oxidation state of Xenon is + 6?

   A. XeF4
   B. XeOF4
   C. XeOF2
   D. Na4XeO6

9. Incomplete oxidation of methane in the limited supply of air forms ?

   A. CO2 and H2O
   B. CH3OH
   C. CO + H2 + C
   D. CO + H2O + C

10. The oxidation state of cu which are expected to be diamagnetic

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

    Submitted by: Siddiqullah wazir