According to Bohr's theory
En = Total energy, Kn = Kinetic Energy, Vn = Potential Energy, rn = Radius of nth orbit
Match the following
Column I
(A) Vn/Kn = ?
(B) If radius of nth orbit $$ \propto E_n^x,x = ?$$
(C) Angular momentum in lowest orbital
(D) $${1 \over {{r_n}}} \propto {Z^y},y = ?$$
Column II
(p) 0
(q) -1
(r) -2
(s) 1
Atbilde
(B)
(A) $$\to$$ r, (B) $$\to$$ q, (C) $$\to$$ p, (D) $$\to$$ s
2
The species present in solution when CO2 is dissolved in water are
Atbilde
(A)
CO2, H2CO3, $$HCO_3^-$$, $$CO_3^{2-}$$
3
MgSO4 on reaction with NH4OH and Na2HPO4 forms a white crystalline precipitate. What is its formula?
Atbilde
(A)
Mg(NH4)PO4
4
75.2 g of C6H5OH (phenol) is dissolved in a solvent of Kf = 14. If the depression in freezing point is 7 K then find the % of phenol that dimerises.
Atbilde
70
5
We have taken a saturated solution of AgBr. Ksp of AgBr is 12 $$\times$$ 10-14. If 10-7 mole of AgNO3 are added to 1 litre of this solution find conductivity (specific conductance) of this solution in terms of 10-7 S m-1 units. Given, molar conductance of Ag+, Br- and $$NO_3^-$$ are 6 $$\times$$ 10-3 Sm2 mol-1, 8 $$\times$$ 10-3 Sm2 mol-1 and 7 $$\times$$ 10-3 Sm2 mol-1
