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Wbjee 2020 paper solution - Chemistry Part 1-4 by XCEL JEE Academy
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Students can check the answer key for West Bengal Joint Entrance Exam (WBJEE) 2020 here. Solutions and analysis are also available for download.

Questions 1-10 of WBJEE 2020 for Chemistry Part 1-4
1 For the above three esters, the order of rates of alkaline hydrolysis is in this order
2. The correct order of acidity for the following compounds is :
3. Cannizzaro reaction: Aldehyde to alcohol and acid
4. For the following carbocations, the correct order of stability is
I: rCH2 – COCH3 II: rCH2 – OCH3 III: rCH2 – CH3
5. The reduction product of ethyl 3-oxobutanoate by NaBH4 in methanol is
6. Perkins reaction
7. In the face-centered cubic lattice structure of gold, the closest distance between gold atoms is (‘a’ being the edge length of the cubic unit cell)
8. The maximum number of electrons in an atom in which the last electron filled has the quantum numbers n = 3, l = 2 and m = –1 is:(A) 17 (B) 27 (C) 28 (D) 30
9. The equilibrium constant for the following reactions are given at 25°C
2A ➡ B + C, K1 = 1.0
2B ➡ C + D, K2 = 16
2C + D ➡ 2P, K3 = 25
The equilibrium constant for the reaction P  A + 1/2 B at 25°C is
(A) 1/20 (B) 20 (C) 1/42 (D) 21
10. Among the following, the ion which will be more effective for flocculation of Fe(OH)3 sol. is
(A) PO4 3– (B) SO4 2– (C) SO3 2– (D) NO3 –

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