Positional Isomerism

Q. What are the minimum number of carbon atoms required for alkanes, alkenes and for alkynes to exhibit positional isomerism respectively?

1. 6, 4, 2
2. 2, 2, 2
3. 2, 4, 6
4. 6, 4, 4

Q.

Which of the following solutions shows negative deviation from Raoult's law?

1. Acetone and chloroform

2. Benzene and toluene

3. Acetone and carbon disulphide

4. Ethyl alcohol and cyclohexane

Q. But-1-ene and But-2-ene exhibits _____________ isomerism.

1. metamerism
2. position
3. chain
4. functional group

Q. The compound $C{H}_{3}CH=CHC{H}_3$ and $C{H}_{3}C{H}_{2}CH=C{H}_2$ are

1. Tautomers
2. Positional isomers
3. Exist together in dynamic equilibrium
4. Optical isomers

Q. The total number of isomers of a disubstituted benzene compound is

1. 1
2. 2
3. 3
4. 4

Q. How many postional isomers are possible of a disubstituted benzene compound.

1. 2
2. 4
3. 1
4. 3

Q. The number of aromatic position isomers containing benzene ring with molecular formula $C_6{H}_6{O}_3$ are ........ and number of tertiary aromatic amine containing benzene with molecular formula $C_8{H}_{11}N$ are ........

1. 4 and 8
2. 3 and 1
3. 3 and 6
4. 4 and 10

Q.

[Co(NH3)5(NO2)](NO3)2 CAN EXHIBIT HOW MANY AND WHICH TYPE OF ISOMERISM ?

Q. Which of the following compounds are position isomers?

1. isobutyl alcohol and sec-butyl alcohol
2. isobutyl alcohol and tert-butyl alcohol
3. isopentyl alcohol and neopentyl alcohol
4. ethyl alcohol and ethylene glycol

Q.

How to write the formula for Calcium carbonate by using the criss-cross method?

Q.

The type of isomerism exhibited by the compound with formula $C_4{H}_{10}O$ is

1. Functional and position

2. Chain, position, functional, and metamerism.

3. Chain and position

4. Metamerism

Q. Examine the relation between the following pairs of compounds.

1. All I, II, III are identical
2. All I, II, III are isomers
3. I, II are identical, III are positional isomers
4. I is identical and II, III are isomers

Q. Minimum number of carbon atoms required in a ketone to show positional isomerism is:

1. 3
2. 4
3. 5
4. 6

Q.

The molecular formula of hydrogen is ${\mathrm{H}}_2$.

What do you understand by this?

Q. What is the correct relationship between the two molecules shown below?

1. There is no relationship.
2. They are positional isomers.
3. They are chain isomers.
4. They are functional group isomers.

Q.

The nitro group in nitrobenzene is a/an

1. ortho directing

2. meta directing

3. para directing

4. o-and p-directing

Q. But-1-ene and But-2-ene exhibits _____________ isomerism.

1. position
2. metamerism
3. chain
4. functional group

Q. Which one of the following reason is responsible for lower melting point of cis isomer than trans-isomer?

1. better packing of trans isomers
2. better packing of cis isomers
3. poorer packing of trans isomers
4. both (a) and (b)

Q. Arrange the following compounds in the decreasing order of rate of dehydration (using conc. $H_{2}S{O}_4)$:

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

Q. 0.303 g of an organic compound was analysed for nitrogen by Kjeldahl’s method. The ammonia gas evolved was absorbed in 50 ml of 0.1N-H2SO4. The excess acid required 25 ml of 0.1 N NaOH for neutralization. The percentage of nitrogen in the given compound is

Q. What are the minimum number of carbon atoms required for alkanes, alkenes and for alkynes to exhibit positional isomerism respectively?

1. 2, 2, 2
2. 2, 4, 6
3. 6, 4, 2
4. 6, 4, 4

Q. The chemical system that is non-aromatic is

1. 

2. 

3. 

4. 

Q. Which pair below represents isomers ?

1. $C{H}_{3}C{H}_{2}C{H}_3$ and $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_3$
2. $C{H}_{3}CH\left(Cl\right)C{H}_3$ and $C{H}_{3}C{H}_{2}C{H}_{2}Cl$
3. $C{H}_{3}C{H}_{2}C{H}_{2}OH$ and $HOC{H}_{2}C{H}_{2}C{H}_{2}C{H}_3$
4. $C{H}_{3}COC{H}_3$and $C{H}_{3}C{H}_{2}C{H}_{2}CHO$

Q. Mention the correct relationship between (I) and (II)

1. Chain isomers
2. Position isomers
3. Identical
4. Stereoisomers

Q.

What are the elements present in the following compound?

Potassium nitrate

Q. The mixture which shows positive deviation from Raoult’s law is:

1. Benzene + Toluene
2. Chloroethane + Bromoethane
3. Ethanol + Acetone
4. Acetone + Chloroform

Q. The total number of isomers of a disubstituted benzene compound is

1. 1
2. 2
3. 3
4. 4

Q. Mention the correct relationship between (I) and (II)

1. Chain isomers
2. Position isomers
3. Identical
4. Stereoisomers

Q.

Write the chemical name of the following:

${\mathrm{CH}}_3\mathrm{COONa}$

Q. Which of the following pairs are related as position isomers?

1. $(C_2{H}_5{)}_{2}COandC{H}_{3}CH=C(OH)C{H}_{2}C{H}_3$
2. $C{H}_2\left(OH\right)C{H}_{2}COOHandC{H}_3-CH\left(OH\right)COOH$
3. $C_2{H}_{5}OHandC{H}_{3}OC{H}_3$
4. All the above