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Q. No.The enolic form of ethyl acetoacetate is given below
The number of σ and π bonds in the enolic form are respectively-
1. 18 sigma bonds and 2 pi-bonds
2. 16 sigma bonds and 1 pi-bond
3. 9 sigma bonds and 2 pi-bonds
4. 9 sigma bonds and 1 pi-bond
The number of σ and π bonds in the enolic form are respectively-
2. 16 sigma bonds and 1 pi-bond
3. 9 sigma bonds and 2 pi-bonds
4. 9 sigma bonds and 1 pi-bond
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is-
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
is aromatic because it has:Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct order of increasing bond length of C-H, C-O, C-C and C=C is-
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn Duma’s method of estimation of nitrogen 0.35 of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be -
(Aqueous tension at 300K= 15 mm)
1. 16.45
2. 17.45
3. 14.45
4. 15.45
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe Lassaigne’s extract is boiled with conc. while testing for halogens, because it-
1. Helps in the precipitation of
2. Increases the solubility product of
3. Increases the concentration of ions
4. Decomposes and , if formed
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most reactive compound towards electrophilic reagent among the following is-
1. 
2. 
3. 
4. 
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most stable conformation of n-butane among the following is:
1.
2.
3.
4.
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