West Bengal Joint Entrance Exam (WBJEE) is an entrance examination for admission in medical and engineering colleges of West Bengal.

As per your request, I am giving you questions form the WBJEE 2013 paper.

Silicone oil is obtained from the hydrolysis and polymerisation of
(A) trimethylchlorosilane and dimethydichlorosilane
(B) trimethylchlorosilane and methyltrichlorosilane
(C) methyltrichlorosilane and dimethyldichlorosilane
(D) triethylchlorosiland and diethyldichlorosilane
Ans : (A)

Hints : Silicone oils are formed on low degree of polymerisation

Identify the CORRECT statement
(A) Quantum numbers (n,I,m,s) are obtained arbitrarily
(B) All the Quantum numbers (n,I,m,s) for any pair of electrons in an atom can beidential under special circum stance
(C) all the quantum numbers (n,I,m,s) may not be required to described an electron of an atom completely
(D) All the quantum numbers (n,I,m,s) are required to describe an electron of an atom completely
Ans : (D)

In borax the number of B–O–B links and B–OH bonds present are, respectively,
(A) Five and four
(B) Four and five
(C) Three and four
(D) Five and five
Ans : (A)

The important advantage(s) of Lintz and Donawitz (L.D.) process for the manufacture of steel is (are)
(A) The process is very quick
(B) Operating costs are low
(C) Better quality steel is obtained
(D) Scrap iron can be used
Ans : (A, C, D)

For complete syllabus, download the attachment.


WBJEE 2013 solved paper

Attached Files

WBJEE 2013 solved paper .pdf (637.6 KB, 623 views)