Clinic Class Test 1 M E

Please read the instructions carefully. You are allotted 5 minutes specifically for this purpose.

Date : 07-03-2013

Duration : 1 Hour

Max. Marks : 80

CHEMISTRY (GOC : BONDING IN ORGANIC

MOLECULES AND RESONANCE)

TEST - 10

INSTRUCTIONS

1. This Question Paper contains 22 questions.

2. No additional sheets will be provided for rough work.

3. Blank paper, clipboard, log tables, slide rules, calculators, cellular phones, pagers and electronic gadgets

in any form are not allowed.

4. The answer sheet, a machine-gradable Objective Response Sheet (ORS), is provided separately.

5. Do not Tamper / mutilate the ORS or this booklet.

6. Do not break the seals of the question-paper booklet before instructed to do so by the invigilators.

7. Write your Name, Roll No. and Sign in the space provide on the back page of this booklet.

B. Filling the bottom-half of the ORS :

Use only Black ball point pen only for filling the ORS. Do not use Gel / Ink / Felt pen as it might smudge the ORS.

8. Write your Roll no. in the boxes given at the top left corner of your ORS with black ball point pen. Also, darken

the corresponding bubbles with Black ball point pen only. Also fill your roll no on the back side of your ORS in the space provided (if the ORS is both side printed).

9. Fill your Paper Code as mentioned on the Test Paper and darken the corresponding bubble with Black ball

point pen.

10. If student does not fill his/her roll no. and paper code correctly and properly, then his/her marks will not be displayed and 5 marks will be deducted (paper wise) from the total.

11. Since it is not possible to erase and correct pen filled bubble, you are advised to be extremely careful while darken the bubble corresponding to your answer.

12. Neither try to erase / rub / scratch the option nor make the Cross (X) mark on the option once filled. Do not scribble, smudge, cut, tear, or wrinkle the ORS. Do not put any stray marks or whitener anywhere on the ORS.

13. If there is any discrepancy between the written data and the bubbled data in your ORS, the bubbled data will be taken as final.

C. Question paper format and Marking scheme :

14. The question paper consists of 1 parts. The part consists of Two Sections.

15. For each question in Section–I, you will be awarded 3 marks if you darken the bubble(s) corresponding to

the correct choice for the answer and zero mark if no bubbled is darkened. In case of bubbling of incorrect

answer, minus one (–1) mark will be awarded.

16. For each question in Section–II, you will be awarded 5 marks if you darken the bubble corresponding to the

correct answer and zero marks if no bubble is darkened. In case of bubbling of incorrect answer, minus one (–1) mark will be awarded.

D O N O T B R E A K T H E S E A L S W IT H O U T B E IN G IN S T R U C T E D T O D O S O B Y T H E I N V IG IL A T O R

C O D E

0

COURSE NAME : VIKAAS (JA) & VIPUL (JB)

COURSE CODE : CLINIC CLASSES

TARGET : JEE (IITs) 2014

RESONANCE

Atomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27, Si = 28,

P = 31, S = 32, Cl = 35.5, K = 39, Ca = 40, Cr = 52, Mn = 55, Fe = 56, Cu = 63.5, Zn = 65, As = 75, Br = 80, Ag = 108, I = 127, Ba = 137, Hg = 200, Pb = 207]

SECTION - I

Straight Objective Type

This section contains 15 questions. Each question has 4 choices (A), (B), (C) and (D) for its answer, out of which ONLY ONE is correct.

1. How many lone pairs of electrons are in resonance of given compound.

(A) 4 (B) 2 (C) 3 (D) 6

2. Compare bond length x and y of following given compound

(A) x = y (B) x > y (C) x < y (D) x >> y

3. In which compound oxygen atom take part in conjugation of phenol (Ph–OH) and Benzyl alcohol (PhCH2OH)?

(A) PhOH (B) PhCH₂OH (C) both (D) none of these

4. The correct stability order of the following resonance structures is :

(A) (IV) > (I) > (III) > (II) (B) (II) > (IV) > (I) > (III) (C) (III) > (II) > (IV) > (I) (D) (I) > (IV) > (III) > (II) Space for Rough Work

RESONANCE

5. In which of the compound cross conjugation are present

(A) x, y (B) y, z, w (C) x, y, z, w (D) only z

6. Which of the following compounds have delocalized electrons ?

(A) CH₂ CHCH₂CCH₃ || O

 (B)

(C) (D) CH₃CH₂CH₂ O CH = CHCH₃

7. How many of these compounds not have conjugated system

(i) (ii) CH₃CH₂NHCH₂CH = CHCH₃ (iii) (iv)

(v) CH₂=CHCH₂CH = CH₂ (vi) (vii)

RESONANCE

8. Select incorrect statement about inductive effect? (A) Inductive effect does not involve -electrons.

(B) Inductive effect is the polarisation of  bond electrons. (C) Inductive effect creates net charge in the molecule. (D) Inductive effect is distance dependent effect.

9. Maximum –I effect is exerted by the group

(A) C₆H₅ (B) –OCH3 (C) –Cl (D) –CHO

10. How many  and  bonds are in the given compound. HC  C — CH = CH2

(A) 3 and 6 bonds (B) 3 and 7 bonds (C) 2 and 7 bonds (D) 4 and 8 bonds

11. The number of sp2

– sp2 bond in given compound

(A) 4 (B) 5 (C) 3 (D) 6

12. The hybridisation of nitrogen in (pyrrole) is :

RESONANCE

13. Resonance is not possible in :

(A) (B) (C) CH₂ = CH — Cl (D)

14. Stability order of the following species ?

(A) >  (B) >  (C) =  (D) can not say

15. Which of them are correct for stability of resonating structure ?

(A) > (B) >

RESONANCE

SECTION - II

Multiple Correct Answer Type

This section contains 7 questions. Each question has 4 choices (A), (B), (C) and (D) for its answer, out of which ONE OR MORE is/are correct.

16. In which of the following II is more stable than I :

(A) (B)

(C) (D)

17. The most unlikely representation(s) of resonance structures of fluorobenzene is :

RESONANCE

18. In which of the following species, correct direction of Inductive effect are shown ?

(A) (B) (C) (D)

19. In which compound IInd _{resonating structure is less stable then I}st_.

(X) (Y)

(Z)

RESONANCE

20. The compounds which are resonance stabilised are

(A) CH₂=CH–Cl (B)

(C) CH₂ = CH – CH2– Cl (D)

21. Which of the given pairs are resonating structures?

(A) & (B) CH₂ = CH – O– & CH2–CHO

 (C) CH₂ = CH – O – CH₃ & CH2–CH O–CH3    (D) CH3–CO  & CH3–CO

22. In which delocalisation of positive charge is NOT possible ?

(A) NH3  (B)  N H H (C) OH2  (D)  O–