Which of the following elements react with steam to produce H2 gas?
A. Pd
B. Ni
C. Sn
D. All of the above…
Monthly Archives: April 2021
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…
A solution can be both____________________?
A. dilute and concentrated
B. dilute and saturated
C. saturated and unsaturated
D. saturated and super saturated…
The unit of molality is__________________?
A. moles dm-3
B. moles kg-1
C. gram dm-3
D. none…
Solubility of CaF2 is 2.0×10-4 gdm-3 then Ksp of CaF2 is_______________?
A. 4.0 x 10-8
B. 3.2 x 10-11
C. 2.0 x 10-8
D. 4.0 x 10-12…
Which of the following points are important in connection with equilibrium constant ?
A. Kc is constant at given temperature
B. Kc is unaffected by change in concentration of reactants or products
C. Kc indicates the extent of reaction but not about the rate of reaction.
D. All of the above…
Which of the following molecule is polar__________________?
A. CCI4
B. CO2
C. BF3
D. none of the above…
Which of the following elements has greater 1st ionization energy__________________?
A. B
B. C
C. N
D. O…
Which catalyst is used in contact process ?
A. Fe2O3
B. V2O5
C. SO3
D. Ag2O…
What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ?
A. 6
B. 4
C. 3
D. 2…