Chains, Rings and Branches

Q.

What is the feminine word of ‘nephew’ ?

1. Nice

2. Niece

3. Niec

4. none

Q.

The number of $\pi$ electrons present in the benzene ring are

1. 2

2. 3

3. 6

4. 12

Q. Why methane can't be methene or methyne?

Q.

What is the general formula of the homologous series of alcohols? [1 MARK]

Q. The compound which has the same molecular formula as that of hexene is __.

1. Cyclooctane
2. Cyclopropane
3. Cyclohexane
4. Cyclobutane

Q.

The IUPAC name of Acetone is:

1. Pentanone

2. Propan-2-one

3. Propan-1-one

4. Butanone

Q.

(a) Giving their structures, state the number of single bonds, double bonds and triple bonds (if any) in the following compounds :
(i) ethyne (ii) ethene (iii) benzene
(b) Write the molecular formula and structure of cyclohexane. How many covalent bonds are there in a molecule of cyclohexane?

Q. Explain the fact that why organic compounds are large in number.

Q.

What is the difference between allyl and alkyl?

Q.

(a) Give the name and structural formula of one member each of the following :
(i) alkane (ii) alkene (iii) alkyne (iv) cycloalkane

(b) What are the common names of (i) Ethyne (ii) Ethene

(c) What is the chemical and structural formula of benzene?

Q.

The hydrocarbons containing only carbon-carbon single bonds are known as

___

Q.

Does ethanone exist? How does its structure look like

Q.

Which of the following is structural formula of neo-pentane?

1. 

2. 

3. 

4. ​

Q.

Name a carbon containing molecule which has two double bonds .

Q.

The number of carbon atoms inthe organic compound name as 2, 2-dimethylpropane is :
(a) two (b) five (c) three (d) four

Q.

Question 1
How many structural isomers can you draw for pentane?

Q.

A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be :
(a) 200 (b) 198 (c) 202 (d) 196

Q.

Which of the following pairs are not isomers ?

1. n-butane and iso-butane

2. n-pentane and neo-pentane

3. 1-butyne and 2-butyne

4. Propane and methyl propane

Q. Dear Sir/Madam,
My question is-
Why are certain compounds called hydrocarbons?
thanking you

Q.

Write the molecular and structural formula fo a cyclid hydrocarbon whose molecule contains 8 atoms of carbon.

Q. Question 23
Which of the following is not a straight chain hydrocarbon?
(a)

(b)

(c)

(d)

Q.

An alkyne has seventy-five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be :
(a) 150 (b) 148 (c) 152 (d) 146

Q. Give at least one example in each case to show the structure of isomers of: [3 MARKS]
(a) single bond compound
(b) double bond compound
(c) triple bond compound.

Q.

Out of the following pairs of compounds, the unsaturated compounds are :
(a) $C_2{H}_{6}and{C}_4{H}_6$ (b) $C_6{H}_{12}and{C}_5{H}_{12}$ (c) $C_4{H}_{6}and{C}_6{H}_{12}$ (d) $C_2{H}_{6}and{C}_4{H}_{10}$

Q.

If a hydrocarbon contains 4 carbon atoms then how many different arrangements of carbon skeletons are possible?

1. 1

2. 2

3. 4

4. 5

Q. Saturated hydrocarbons contain only single bonds between the carbon atoms in them.

1. True
2. False

Q. Choose the correct answer:

(d) The total number of different carbon chains that four carbon atoms form in alkane is

1. $4$
2. $2$
3. $3$
4. $5$

Q. Write the IUPAC name of the following:
(d)

Q.

Two organic compounds A and B have the same molecular formula $C_6{H}_{12}$. Write the names and structural formulae:
(a) If A is a cyclic compound
(b) If B is an open chain compound
(c) Which compound contains single bonds as well as a double bond?
(d) Which compound contains only single bonds?

Q. If double bond or triple bond is stronger than single bond than how can it be unsaturated and its bond is easily breakable?