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...