Which of the following pairs are isoelectronic and isostructural?
$$NO_3^-$$, $$CO_3^{2-}$$, $$ClO_3^-$$, SO3
Përgjigju
(A)
$$NO_3^-$$, $$CO_3^{2-}$$
1
Two students use the same stock solution of ZnSO4 and solution of CuSO4. The emf of one cell is 0.03 V higher than other. The conc. of CuSO4 in the cell with higher emf value is 0.5 M. Find out the conc. of CuSO4 in the other cell (2.203 RT/F = 0.06)
Përgjigju
(B)
0.05 M
2
Mixture X = 0.02 mol of [Co(NH3)5SO4]Br and 0.02 mol of [Co(NH3)5Br]SO4 was prepared in 2 litre of solution.
1 litre of mixture X + excess AgNO3 $$ \to $$ Y.
1 litre of mixture X + excess BaCl2 $$ \to $$ Z
No. of moles of Y and Z are
Përgjigju
(A)
0.01, 0.01
2
1 gm of charcoal adsorbs 100 ml 0.5 M CH3COOH to form a monolayer, and thereby the molarity of CH3COOH reduces to 0.49. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal = 3.01 $$\times$$ 102 m2/gm.
Përgjigju
(C)
5 x 10^-19 m^2
3
Which has maximum number of atoms?
Përgjigju
(A)
24 g of C(12)
3
Using VSEPR theory deduce the structures of PCl5 and BrF5
