# Solved papers for NEET Chemistry NEET PYQ-Organic Chemistry Some Basic Principles

### done NEET PYQ-Organic Chemistry Some Basic Principles Total Questions - 6

• question_answer1) Camphor is often used in molecular mass determination because:       [AIPMT (S) 2004]

A)

B)
it has a very high cryoscopic constant

C)
it is volatile

D)
it is solvent for organic substances

• question_answer2) In Dumas method of estimation of nitrogen 0.35 g 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 $300\text{ }K=15\text{ }mm$)  [AIPMT (S) 2011]

A)
16.45

B)
17.45

C)
14.45

D)
15.45

• question_answer3) The Lassaigne's extract is boiled with cone $HN{{O}_{3}}$ while testing for halogens. By doing so it     [AIPMT (S) 2011]

A)
helps in the precipitation of AgCl

B)
increases the solubility product of AgCl

C)
increases the concentration of $NO_{3}^{-}$ ions

D)
decomposes $N{{a}_{2}}S$ and NaCN, if formed

• question_answer4)      In the Kjeldahls method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralised 10mL of 1 M ${{H}_{2}}S{{O}_{4}}$. The percentage of nitrogen in the soil is       [AIPMT 2014]

A)
37.33

B)
45.33

C)
35.33

D)
43.33

• question_answer5) In Dumas method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is                               [NEET 2015 (C)]

A)
17. 36

B)
18.20

C)
16.76

D)
15.76

• question_answer6) Paper chromatography is an example of [NEET 2020]

A)
Partition chromatography

B)
Thin layer chromatography

C)
Column chromatography

D)