Which of the elements show passivity when treated with conc. HNO3?

Related Mcqs:

1. Treatment of sucrose with conc. HNO3 gives__________?

   A. Nitrosucrose
   B. Glucose+ fructose
   C. Oxalic acid
   D. Laevulinic acid

   Submitted by: Muhammad Ali Kunbhar

2. Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________?

   A. 6
   B. 8
   C. 10
   D. 4

3. The gas which cannot be dried by conc. H2SO4 ?

   A. SO2
   B. H2S
   C. CO2
   D. C2H4

4. AgCl dissolved with conc (2×10-2) Ksp will be__________________?

   A. 3.6 x 10-6
   B. 3.6 x 10-5
   C. 7.2 x 10-6
   D. 4 x 10-4

5. Greater the conc. Of reactant__________________?

   A. Greater will be dx/dt
   B. Lesser will be dx/dt
   C. dx/dt will be moderate
   D. any of above

6. What is the molecular Weight of Nitric acid (HNO3 ) ?

   A. 63.012 g/mol
   B. 65.012 g/mol
   C. 70.012 g/mol
   D. 81.011 g/mol

   Submitted by: Rashid Mehmood

7. Find the PH of a 0.001 M solution of Nitric acid HNO3?

   A. 2
   B. 3
   C. 4
   D. 5

   Submitted by: Muhammad Ali Kunbhar

8. Which of the p-block elements are not representative elements ?

   A. Alkali metals (I-A)
   B. Group-14 elements (IV-A)
   C. Group-18 elements (VIII-A)
   D. Halogens (VII-A)

9. When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?

   A. an acid
   B. a dehydrating agent
   C. an oxidizing agent
   D. as sulphonating agent

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

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