The IUPAC name of the above-mentioned compound is:

1. Pent-1-en-3-yne

2. Pent-1-ene-4-yne

3. Pent-4-yn-1-ene

4. Pent-1-en-4-yne

Subtopic:  Nomenclature |
From NCERT
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A compound that does not give a positive test in Lassaigne’s test for nitrogen is-

1. Urea 2. Hydrazine
3. Azobenzene 4. Phenyl hydrazine
Subtopic:  Quantitative Analysis of Organic Compounds |
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The pair that represents chain isomers is- 

1. CH3CHCl2 and ClCH2CH2Cl 2. Propyl alcohol and Isopropyl alcohol
3. 2-Methylbutane and Neopentane 4. Diethyl ether and Dipropyl ether
Subtopic:  Structural Isomers |
 62%
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The most stable conformation of n-butane among the following is:

1. 2.
3. 4.
Subtopic:  Conformational Isomers |
 88%
From NCERT
AIPMT - 2010
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In Kjeldahl’s method for estimation of nitrogen present in the soil sample, ammonia evolved from 0.75g of sample neutralized 10ml. of 1M H2SO4. The percentage of nitrogen in the soil is:

1. 37.33 2. 45.85
3. 25.75 4. 43.13
Subtopic:  Qualitative Analysis of Organic Compounds |
 71%
From NCERT
AIPMT - 2014
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The total number of pi-bond electrons in the following structure are:
1. 4 2. 8
3. 12 4. 16
Subtopic:  Hybridisation & Structure of Carbon Compounds |
 66%
From NCERT
NEET - 2015
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The correct order with respect to –I effect of the substituents is:
(R = alkyl)

1. –NH2 > –OR < –F
2. –NR2 < –OR < –F
3. –NH2 > –OR > –F
4. –NR2 > –OR > –F

Subtopic:  Electron Displacement Effects |
From NCERT
NEET - 2018
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The correct statement regarding electrophile is :

1. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
2. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
3. Electrophiles can be either neutral or positively charged species and can form a bond accepting a pair of electrons from a nucleophile
4. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile

Subtopic:  Nucleophile & Electrophile |
 84%
From NCERT
NEET - 2017
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The IUPAC name of the above mentioned compound is - 

1. Citric acid

2. 3-Hydroxy pentane-1,5-dioic acid

3. 2-Hydroxypropane-1,2,3-tricarboxylic acid

4. 2-Carboxy-2-hydroxy propane-1,3-dicarboxylic acid

Subtopic:  Nomenclature |
 82%
From NCERT
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The aromatic compound among the following is:-

1. 2.
3. 4.
Subtopic:  Aromaticity & Polarity |
 75%
From NCERT
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