WBJEE 2015 Solved Chemistry Question Paper – Part 1

Find WBJEE 2015 Solved Chemistry Question Paper – Part 1 in this article. This paper consists of 5 questions (#1 to #5) from WBJEE 2015 Chemistry paper. Detailed solution of these questions has been provided so that students can match their solutions.

Importance of Previous Years’ Paper:

Previous years’ question papers help aspirants in understanding exam pattern, question format, important topics and assessing preparation. It has also been seen that sometimes questions are repeated in WBJEE Exam. So, this paper will certainly boost your confidence.

About WBJEE Exam

WBJEE is a common entrance examinations held at state level for admission to the Undergraduate Level Engineering and Medical courses in the State of West Bengal. The Chemistry section of WBJEE 2015 engineering entrance exam consists of 40 questions.

41. Match the flame colours of the alkaline earth metal salts in the Bunsen burner.

(a) Calcium          (p) brick red

(b) Strontium     (q) apple green

(c) Barium           (r) crimson

(A) a-p, b-r, c-q

(B) a-r, b-p, c-q

(C) a-q, b-r, c-p

(D) a-p, b-q, c-r

Ans : (A)

Sol:

The correct flame coloration is

In Bunsen Burner,

Calcium burns as Brick Red.

Srtontium burns as Crimson Red.

Barium burns as Apple Green.

So, the correct option is A.

Ans: (A)

Sol.

43. The atomic number of cerium (Ce) is 58. The correct electronic configuration of Ce³⁺ ion is

(A) [Xe]4f¹

(B) [Kr]4f¹

(C) [Xe]4f¹³

(D) [Kr]4d¹

Ans: (A)

Sol.

The atomic number of Xe is 54.

So, the electronic configuration of Ce is [Xe] 4f¹ 5d¹6s²

The atomic configuration of Ce³⁺ ion is [Xe] 4f¹

WBJEE 2016 Solved Physics and Chemistry Question Paper

Ans: (B)

Sol.

 For 1, 3-butadiene at room temp there is formation of 1,4- addition product. So, the product is

and the most stable one is (I).

So, (b) is the correct option.

Ans: (C)

Sol.

It is a substitution reaction so the product formed is:

WBJEE Sample Question Paper Set-II