Primary, Secondary, Tertiary and Quaternary Carbon

Q.

(i) Write structures of different isomeric amines corresponding to the molecular formula, C₄H₁₁N

(ii) Write IUPAC names of all the isomers.

(iii) What type of isomerism is exhibited by different pairs of amines?

Q. The number of structural isomers possible from the molecular formula $C_3{H}_{9}N$ is:

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

Q.

Discuss the principle of estimation of halogens, sulphur and phosphorus present in an organic compound.

Q.

The structure of isoprene is:

1. ${\mathrm{CH}}_2=\mathrm{C}\left({\mathrm{C}}_2{\mathrm{H}}_5\right)-\mathrm{CH}={\mathrm{CH}}_2$

2. ${\mathrm{CH}}_2=\mathrm{C}\left({\mathrm{OCOCH}}_3\right)-\mathrm{CH}={\mathrm{CH}}_2$

3. ${\mathrm{CH}}_2=\mathrm{C}\left({\mathrm{CH}}_3\right)-\mathrm{CH}={\mathrm{CH}}_2$

4. ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{C}=\mathrm{CH}$

Q. The number of $3^{\circ }$ and $2^{\circ }$ carbon atoms in the following compound is :

1. 5, 6
2. 5, 7
3. 4, 6
4. 6, 6

Q. Four structures are given in options (A) to (D). Examine them and select the aromatic structures.

1. 
2. 
3. 
4. 

Q. How to find number of isomers of any functional isomers?

Q.

Which compound has alkyne group?

1. ${\mathrm{C}}_7{\mathrm{H}}_{14}$

2. ${\mathrm{C}}_{10}{\mathrm{H}}_{22}$

3. ${\mathrm{C}}_9{\mathrm{H}}_{16}$

4. ${\mathrm{C}}_{16}{\mathrm{H}}_{32}$

Q.

A hydrocarbon has three carbon atoms. Write down its molecular formula as an alkene.

Q.

Methoxy Methane and Ethanol Are

1. Chain isomers

2. Position isomers

3. Optical isomers

4. Functional isomers

Q. Total number of isomers, considering both structural and stereoisomers, of cyclic ethers with the molecular formula $C_4{H}_{8}O$ is .

Q. Arrange the following in decreasing order of their basic strength:
$C_6{H}_{5}N{H}_2,C_2{H}_{5}N{H}_2,$
$(C_2{H}_5{)}_{2}NH,N{H}_3$

Q.

The compound of carbon and hydrogen is called ____.

Q.

In the alkane $H_{3}C-C{H}_2-C(C{H}_3{)}_2-C{H}_2-CH(C{H}_3{)}_2$, identify $1^{\circ },2^{\circ },3^{\circ }$ carbon atoms and give the number of H atoms bonded to each one of these.

Q. Identify total number of $2^o$ hydrogens present in the given compound :

1. 8
2. 4
3. 5
4. 6

Q. The correct order of density of the following haloalkanes are:
i. $C{H}_{3}C{H}_{2}C{H}_{2}I$
ii. $C{H}_{3}C{H}_{2}C{H}_{2}Br$
iii. $C{H}_{3}C{H}_{2}C{H}_{2}Cl$

1. i>ii>iii
2. ii>iii>i
3. iii>ii>i
4. i>iii>ii

Q. Which of the following structures have $3^{\circ }$ (Tertiary) Carbon atom ?

1. 
2. 
3. 
4. 

Q.

Write the molecular formula of each of the following - Heptane

Q.

A hydrocarbon has $4$ hydrogen atoms. Give its molecular formula if its alkyne.

1. ${\mathrm{CH}}_4$

2. ${\mathrm{C}}_3{\mathrm{H}}_4$

3. ${\mathrm{C}}_2{\mathrm{H}}_6$

4. ${\mathrm{C}}_2{\mathrm{H}}_4$

Q.
In above compound, total number of $2^{\circ }$ carbon atom(s) is/are :

1. 18
2. 3
3. 6
4. 9

Q.

A hydrocarbon has three carbon atoms. Write down its molecular formula as an alkyne.

Q. Which of the following product is formed when four moles of $NO$ gas reacts with two moles of potassium hydroxide?

1. $KN{O}_3$
2. $NO$
3. $N_{2}O$
4. $HN{O}_2$

Q. For alkali metal $M$:
$M_{2}O+H_{2}O\to x{M}_2{O}_2+H_{2}O\to x+yM{O}_2+H_{2}O\to x+y+z$
Sum of the number of atoms present in one molecule of each of $x,y,z$ is:

Q.

How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon

$C{H}_3-CH\left(C{H}_3\right)-C(C{H}_3{)}_2-C{H}_2-CH(C{H}_3)-C{H}_2-C{H}_3$

1. 6, 2, 2, 1

2. 2, 6, 3, 0

3. 2, 4, 3, 2

4. 2, 2, 4, 3

Q. Find out the total number of secondary carbons present in the given structure.

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

Q. Which of the following compound will give a blood red colour while doing Lassaigne's test?

1. $(N{H}_2{)}_{2}CO$
2. $N{H}_2{C}_6{H}_{4}S{O}_{3}H$
3. $H_{2}S{O}_4$
4. $CHC{l}_3$

Q.

Name the oxidizing agent used for the conversion of ethanol to ethanoic acid. Distinguish between ethanol and ethanoic acid on the basis of (i) litmus test, (ii) reaction with sodium hydrogen carbonate.

Q. The number of secondary carbon atoms in the given compound $\left(C{H}_3{)}_{2}CHC{H}_{2}CH\right(C{H}_3{)}_2$ is:

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

Q.
The true statement about the above compounds is:

1. (a) is phenol, (b) is an alcohol
2. Both (a) and (b) are primary alcohols
3. (a) is a primary alcohol and (b) is a secondary alcohol
4. (a) is a secondary alcohol and (b) is a primary alcohol

Q. Identify total number of $3^o$ hydrogens and $2^o$ hydrogens present in the given compound :
$H_{3}C-C(C{H}_3{)}_2-(C{H}_2{)}_2-CH(C{H}_3{)}_2$

1. $3^{o}H:2and{2}^{o}H:6$
2. $3^{o}H:2and{2}^{o}H:8$
3. $3^{o}H:2and{2}^{o}H:4$
4. $3^{o}H:1and{2}^{o}H:4$