Boiling Point of Alkanes

Q. The compound with the highest boiling point is:

1. n-pentane
2. n-hexane
3. 2-methylbutane
4. 2, 2-dimethylpropane

Q. 58. Find percentage of water in oxalic acid crystal

Q.

Which of the following has highest boiling point?

1. All have same

2. Ethanol

3. Propane

4. Pentanol

Q. 36. How many gram of dibasic acid (mol weight 200) should be present in 100 ml of the aqueous solution to give strength of 0.1N ? 1) 10g 2) 2g 3) 1 g 4) 20 g

Q.

Explain why the branching of an alkane chain lower its boiling points?

Q. Which of the statement(s) regarding alkanes is/are correct?

1. All the alkanes are solids at room temperature ( 298 K )
2. Alkanes are colourless.
3. For a given molar mass , as the branching in alkane increases, boiling point increases.
4. Alkanes are insoluble in polar solvents.

Q. 40. How many gram of diabetic acid molecular weight 200 should be present in 100 ml of the aqueous solution to give strength of 0.1 N.

Q. Which of the following hydrides is least stable hydride is:

1. $C{H}_4$
2. $Pb{H}_4$
3. $Sn{H}_4$
4. $Si{H}_4$

Q. Arrange the following in decreasing order of their boiling points : 1) n-Butane 2) 2-Methylbutane 3) n-Pentane 4) 2, 2-Dimethylpropane a) 1>2>3>4 b) 2>3>4>1 c) 4>3>2>1 d) 3>2>4>1

Q. Explain the nomenclature of the compound tert.butyl.chloride or 2- chloro 2- methyl propane

Q. Arrange the compounds in the order of decreasing boiling points.
1. Ethanol
2. Propane
3. Pentanol

1. $1>2>3$
2. $3>1>2$
3. $1>3>2$
4. $3>2>1$

Q. 36. Alkanes with even number of carbon atoms have more melting point than its preceding and succeeding all things is it same for boiling point also what order will it follow ??

Q. Which of the statement(s) regarding alkanes is/are correct?

1. All the alkanes are solids at room temperature ( 298 K )
2. Alkanes are colourless.
3. For a given molar mass , as the branching in alkane increases, boiling point increases.
4. Alkanes are insoluble in polar solvents.

Q. Arrange the compounds in the order of decreasing boiling points.
1. Butane
2. 1, 2, 3-Pentane triol
3. Butyl alcohol

1. $2>3>1$
2. $1>2>3$
3. $1>3>2$
4. $2>1>3$

Q.

Isomers of hexane, based on their branching, can be divided into three distinct classes asshown below:


The correct order their boiling point is:

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

Q. Arrange following in increasing order of their boiling point
2-Methylpropene , But-2-ene , 2-Methylbut-2-ene , Propene , 2, 3-Dimethylbut-2-ene

Q. Explain why nonane has a higher boiling point than hexane?

Q. Explain the differences in boiling point for 1 bromobutane and 2 bromobutane