Organic Compounds

Q.

Calculate the mole fraction of ethylene glycol and water in a solution containing 20% of C₂H₆O₂ by mass.

Q.

In Dumas method for the estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm of Hg pressure. If the aqueous tension at 300 K is 25 mm of Hg, what is the percentage of nitrogen in the compound (approximately)?

1. 15.76
2. 17.36
3. 16.8
4. 18.2

Q. In Kjeldahl’s method for the estimation of nitrogen present in a soil sample, the ammonia evolved from $0.75\text{g}$ of sample neutralized $10\text{mL}$ of $1\text{M}{H}_{2}S{O}_4$. The percentage of nitrogen in the soil is:

1. $37.33$
2. $45.33$
3. $35.33$
4. $43.33$

Q. Which of the following compounds are aromatic

1. 
2. 
   
3. 
   
4. 

Q.

For the same alkyl group, the boiling point of alkyl halides decrease in the order:

1. RI> RBr> RCl> RF

2. RF<RBr<RCl<RI

3. RI< RCl< RBr <RF

4. RI<RBr<RCl<RF

Q. Reaction between acetone and methylmagnesium chloride followed by hydrolysis will be give :

1. Tert. butyl alcohol
2. Isobutyl alcohol
3. Sec. butyl alcohol
4. Isopropyl alcohol

Q.

Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?

Q.

A sample of 0.50 g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50 mL of 0.5 M $H_{2}S{O}_4$. The residual acid required 60 mL of 0.5 M solution of NaOH for neutralisation. Find the percentage composition of nitrogen in the compound.

Q.

Azo-dye test is given by:

1. All amines

2. Only primary amines

3. Only primary aliphatic amines

4. Only primary aromatic amines

Q. Ethanol and dimethyl ether form a pair of functional isomers. The boiling point of ethanol is higher than that of dimethyl ether, due to the presence of

1. $H-$bonding in ethanol
2. $H-$bonding in dimethyl ether
3. $C{H}_3$ group in ethanol
4. $C{H}_3$ group in dimethyl ether

Q. which of the following has highest boiling point? A.1 mole of glucose B.1 mole of kcl A.1 mole of glucose, B.1 mole of kcl, c.1 mole Al(NO3)3 , D.1 mole of na2so4

Q. Identify the most acidic hydrogen in the given compound :

1. a
2. b
3. c
4. d

Q. For the estimation of nitrogen, $1.4g$ of organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in $60mL$ of $\frac{M}{10}$ sulphuric acid. The unreacted acid required $20mL$ of $\frac{M}{10}$ sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is

Q. Arrange the following compounds in the increasing order of polarity.

1. $I<II<III$
2. $II<I<III$
3. $III<II<I$
4. $III<I<II$

Q. What is ozonolysis pls explain in detail with a diagram?

Q. Which among the following is a non-benzenoid aromatic compound?

1. Toluene
2. Phenanthrene
3. Naphthalene
4. Thiophene

Q.

Geometrical isomerism is a type of________

Q.

What is the ionization energy of Lithium?

Q. Choose the correct order of acidity.

1. $HC\equiv CH>H_{3}C-C\equiv CH>H_{2}C=C{H}_2>H_{3}C-C{H}_3$
2. $HC\equiv CH>H_{2}C=C{H}_2>H_{3}C-C\equiv CH>H_{3}C-C{H}_3$
3. $H_{3}C-C{H}_3>H_{2}C=C{H}_2>H_{3}C-C\equiv CH>HC\equiv CH$
4. $H_{3}C-C{H}_3>H_{2}C=C{H}_2>HC\equiv CH>H_{3}C-C\equiv CH$

Q. Clemmenson reduction of ketone is carried out in the presence of :

1. $LiAl{H}_4$
2. $Zn-Hg/HCl$
3. $1.N{H}_2-N{H}_2,2.\text{Ethylene glycol with}KOH$
4. $H_2\text{with}\text{Pt as catalyst}$

Q.

-CHO represents the functional group of______

Q. Formic acid is a stronger acid than acetic acid. This can be explained using

1. +M effect
2. –I effect
3. +I effect
4. –M effect

Q.

The correct values of ionization enthalpies (in KJ ${mol}^{-1}$) of Si, P, S and Cl respectively are:

1. 786, 1012, 999, 1256

2. 786, 1012, 1256, 999

3. 786, 999, 1012, 1256

4. 1012, 786, 999, 1256

Q. Which of the following compounds are soluble in $NaHC{O}_3$?

1. Picric acid
2. 
3. 
4. 

Q. In which of the following pairs both the species have $s{p}^3$ hybridization?

1. $Si{F}_4,Be{H}_2$
2. $N{F}_3,H_{2}O$
3. $N{F}_3,B{F}_3$
4. $H_{2}S,B{F}_3$

Q.

Diastase enzyme converts starch to

1. Glucose

2. Sucrose

3. Maltose

4. Ethyl alcohol

Q.

Tropolone is an example of

1. Alicyclic Compound

2. Benzenoid Aromatic Compound

3. Heterocyclic Aromatic Compound

4. Non-Benzenoid Aromatic Compound

Q.

What is the difference between Cl2 and 2Cl?

Q.

What is the molecular formula for sodium meta aluminate?

Q. How many $s{p}^3$ hybridised carbon atoms are there in the given anti cancer compound (podophyllotoxin) ?

1. 6
2. 7
3. 9
4. 8