Target DPP Test

1.

Which one of the following has the shortest carbon-carbon bond length?
1. Benzene
2. Ethene
3. Ethyne
4. Ethane

2.

What is the correct order of increasing acidic strength among (I) p-methoxyphenol, (II) p-methylphenol, and (III) p-nitrophenol?
1. III < I < II
2. II < I < III
3. III < II < I
4. I < II < III

3.

Which order for basic character of amine is correct for following compounds?

1. 3>1>2>5>4 2. 3>2>1>5>4
3. 3>1>2>4>5 4. 3>2>1>4>5

4.

The most acidic compound among the following is:

1.	o-Cresol	2.	p-Nitrophenol
3.	Phenol	4.	m-Cresol

5.

The correct order of basicities of the following compounds is:
(1)
(2) ${CH}_{3} - {CH}_{2} - {NH}_{2}$
(3) ${({CH}_{3})}_{2} NH$
(4) ${CH}_{3} - \overset{\overset{O}{| |}}{C} - {NH}_{2}$
1. 2>1>3>4
2. 1>3>2>4
3. 3>1>2>4
4. 1>2>3>4

6.

In the above compound, arrange the nitrogen according to their decreasing basic strength.
1. 1>2>3>4
2. 4>3>1>2
3. 2>4>1>3
4. 3>4>1>2

7.

Which of the following does not represent the resonating structure of
1.
2.
3.
4.

8.

If is mixed with NaOH solution. Acid base reaction occurs and HO- snatches H+ from organic molecule. Which carbon will loose H easily?
1. P
2. Q
3. R
4. S

9.

The correct acidic strength order of acidic hydrogen x, y and z is respectively.

(1) x > z > y
(2) x > y > z
(3) z > y > x
(4) y > z > x

10.

The correct order of acid and basic strength for the following pair of compounds should be?

(1) I > II ; III > IV ; V > VI ; VII < VIII
(2) I < II ; III > IV ; V < VI ; VII > VIII
(3) I > II ; III > IV ; V > VI ; VII > VIII
(4) I < II ; III > IV ; V < VI ; VII < VIII

11.

Electrophiles are:
1. electron loving species
2. electron hating species
3. nucleus loving reagents
4. nucleus hating reagents

12.

Who pointed out the concept of hyperconjugation?
(1) Nathan and Baker
(2) Mulliken
(3) Kekule
(4) Kolbe

13.

Which one among the following is most reactive towards nucleophilic addition reaction?

1.		2.
3.		4.

14.

The correct increasing order of basic strength of the given structures is:
$(1) \mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2^{-}~~~~ (2) \mathrm{H}_2 \mathrm{C}=\mathrm{CH}^{-}~~~ (3) H-C \equiv C^{-}$

1.	(2) > (1) > (3)	2.	(1) > (3) > (2)
3.	(3) > (2) > (1)	4.	(1) > (2) > (3)

15.

The double bond in the above-mentioned compound that accepts proton $(H^{+})$ fastest is:

1.	A	2.	B
3.	C	4.	D

16.

Which of the following order is incorrect regarding the indicated property?
1.
2.
3.
4.

17.

Which of the following carboxylic acids will be the most acidic?
1. ${CH}_{3} {CHClCH}_{2} COOH$
2. ${CH}_{3} {CH}_{2} {CCl}_{2} COOH$
3. ${CH}_{3} {CH}_{2} CHClCOOH$
4. ${CH}_{3} {CH}_{2} {CH}_{2} COOH$

18.

A: Inductive effect is a permanent effect.
R: $- {CH}_{3}$ group shows +l effect.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.

19.

The aromatic structure(s) out of given structures is/are-

1.	A, C, D, F & G only	2.	A & D only
3.	A, C, E, F only	4.	All are aromatic

20.

The Huckel's rule-based aromaticity is shown by:

(A)		(B)
(C)		(D)
(E)		(F)

1.	A, B, D only	2.	B, D only
3.	B, D, E and F only	4.	A, B, D, E & F only

21.

Match the ions given in Column I with their nature given in Column II.

	Column I (Ions)		Column II (Corresponding nature)
A.		I.	Stable due to resonance
B.		II.	Destabilised due to inductive effect
C.		III.	Stabilised by hyperconjugation
D.		IV.	A secondary carbocation

Codes:

Options:	A	B	C	D
1.	I,II	II	II	III,IV
2.	I	II,IV	III	IV
3.	I	IV	III	II
4.	IV	I	III	II

22.

The species among the following that is not an electrophile is:
1. $B H_{3}$
2. $H_{3} \overset{\oplus}{O}$
3. $\overset{\oplus}{N} O_{2}$
4. $\overset{\oplus}{C l}$

23.

Which amongst the following is the most stable carbocation:

1.		2.
3.		4.

24.

$H_{3} {CO}^{-}$ ion is a-
1. carbocation
2. nucleophile
3. electrophile
4. carboanion

25.

The species present below is
$R - NH - R$
1. nucleophile
2. carbocation
3. electrophile
4. carboanion

26.

The incorrect order regarding the – 𝐼 effect of the substituents among the following is:

1.	$-\mathrm{I}<-\mathrm{Br}<-\mathrm{Cl}<-\mathrm{F}$
2.	$-\stackrel{+}{\mathrm{NR}}_3<-\stackrel{+}{\mathrm{OR}}_2$
3.	$-\stackrel{+}{\mathrm{NR}}_3<-\mathrm{OR}<-\mathrm{F}$
4.	$-\mathrm{SR}<-\mathrm{OR}<-\stackrel{+}{\mathrm{OR}}_2$

27.

The strongest ortho/para directing group is:
1. −NH₂
2. −CH₃
3. −Cl
4. −C₂H₅

28. The most acidic hydrocarbon among the following is:

1.		2.
3.		4.

29. The correct order of nucleophilicity among the following is:
1. $NH_{2}^{-}>NH_3 $
2. $H_2O>OH^-$
3. $F^->I^- $
4. $Ph-O^->OH^- $

30. How many hydrogens are involved in hyperconjugation in the given organic compound A?

1.	12	2.	13
3.	15	4.	16

31. Given below are two statements:

Statement I:	Cycloheptatrienyl cation is an aromatic species.
Statement II:	Cycloheptatrienyl cation contains $6 \pi$ electrons in conjugation.

In the light of the above statements, choose the correct answer from the options given below:

1.	Statement I is incorrect and Statement II is correct.
2.	Both Statement I and Statement II are correct.
3.	Both Statement I and Statement II are incorrect.
4.	Statement I is correct and Statement II is incorrect.

32.

Statement I:	Inductive effect and resonance are permanent effects.
Statement II:	The energy of the actual structure of the molecule (the resonance hybrid) is higher than that of any of the canonical structures.

In light of the above statements, choose the correct option :

1.	Statement I is correct, but Statement II is incorrect.
2.	Both Statement I and Statement II are correct.
3.	Both Statement I and Statement II are incorrect.
4.	Statement I is incorrect, but Statement II is correct.

33. Which hydrogen is the most acidic in the molecule shown?

1. H_a
2. H_b
3. H_c
4. H_d

34. Among the following, which compound exhibits a bond formed by the overlapping of $sp-sp^3 $ hybrid orbitals?
1. $CH_3 -C\equiv C-H$
2. $CH_3 -CH=CH-CH_3 $
3. $CH_2 = CH-CH=CH_2 $
4. $HC \equiv CH $

35. A pair of carbocations that has a more stable second carbocation than the first is :

1.
2.
3.
4.

36. The correct decreasing order of bond length in the given compound is:

1.	I > III > II	2.	II > I > III
3.	I > II > III	4.	III > II > I

37. How many sigma $(\sigma) $ and pi $(\pi) $ bonds are present in the given structure?

1. $\sigma $ bonds -33 and $\pi$ bonds -2
2. $\sigma $ bonds -22 and $\pi$ bonds -2
3. $\sigma $ bonds -42 and $\pi$ bonds -2
4. $\sigma $ bonds -40 and $\pi$ bonds -3

38. The total number of resonance structures (including the given structure) that can be drawn for the following carbocation is:

1. 0
2. 1
3. 3
4. 4

39. Which one of the following is not a correct resonating structure?

1.		2.
3.		4.

40. Identify the compound in which the lone pair of oxygen is delocalized:

1.		2.
3.		4.

41. The total number of lone pair of electrons in the given molecule is:

1. 8
2. 6
3. 5
4. 7

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1.	\(-\mathrm{I}<-\mathrm{Br}<-\mathrm{Cl}<-\mathrm{F}\)
2.	\(-\stackrel{+}{\mathrm{NR}}_3<-\stackrel{+}{\mathrm{OR}}_2\)
3.	\(-\stackrel{+}{\mathrm{NR}}_3<-\mathrm{OR}<-\mathrm{F}\)
4.	\(-\mathrm{SR}<-\mathrm{OR}<-\stackrel{+}{\mathrm{OR}}_2\)

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