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Syllabus
1. if no. of moles of SO3 and SO2 in flask are same then how many moles of O2 are present.
2.no. of moles of SO3 is twice of SO2, then how many moles of O2 are present.
a) 10-15
b) 10-10
c) 10-5
d) 10-20
1) root 5/2 2) 2 3) root 5 4) 2/root 5
Q. The pKa of HNO2 is 3.37. The pH of HNO2 in its 0.01 mol L-l aqueous solution will be :-
(1) 5.37 (2) 2.69
(3) 1.69 (4) 0.69
Q.The solubility product of BaSO4 at 25 C is 1.0 10-9. What would be the concentration of H2SO4 necessary to precipitate BaSO4 from a solution of 0.01 M Ba+2 ions :-
(1) 10-9 (2) 10-8
(3) 10-7 (4) 10-6
(Ksp for AgCl = 1.8 × 10–10, Ksp for PbCl2 = 1.7 × 10–5)
(i) [Ag+] = 1.8 × 10–11 M; [Pb2+] = 1.7 × 10–4 M;
(ii) [Ag+] = 1.8 × 10–7 M; [Pb2+] = 1.7 × 10–6 M;
(iii) [Ag+] = 1.8 × 10–11 M; [Pb2+] = 8.5 × 10–5 M;
(iv) [Ag+] = 1.8 × 10–9 M; [Pb2+] = 1.7 × 10–3 M;
a) NaClO b) NaClO2 c) NaClO3 d) NaClO4
NaH2PO2
Na2HPO3
Na2HPO4
all
a) mol2 dm-6
b) mol3 dm-9
c) mol4 dm-12
d) mol5 dm-15
1. 7
2. 6.125
3. 6.9
4. 7.1
10
9
4
7