#1
16th October 2014, 07:54 AM
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WBJEE Exam Sample Question Papers
Will you please share the Chemistry Sample question paper of WBJEE Exam??
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#2
16th October 2014, 09:21 AM
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Re: WBJEE Exam Sample Question Papers
As per your request here I am sharing the Chemistry Sample question paper of WBJEE Exam The pKa of a weak acid, HA is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be i. 7.01 ii. 9.22 iii. 9.58 iv. 4.79 Amount of oxalic acid present in a solution can be determined by its titration with KMnO4solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl i. reduces permanganate to Mn2+. ii. oxidises oxalic acid to carbon dioxide and water. iii. gets oxidised by oxalic acid to chlorine. iv. furnishes H+ ions in addition to those from oxalic acid. Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is i. R2SiCl2 ii. R3SiCl iii. R4Si iv. RSiCl3 Rest of the Questions are attached in below file which is free of cost |