Unsaturated Hydrocarbons

Q. The third member of the family of alkenynes has the molecular formula.

Q.

Write the number of $\mathrm{C}$ and $\mathrm{H}$ atoms in a molecule of Methane.

Q.

Find the number of moles of methane in $0.8\text{g}$ of methane.

Q.

Describe carbonyl group. Draw the general structures of an aldehyde and a ketone.

Q.

A cylinder contains $68\text{g}$ of ammonia gas at S.T.P. How many molecules of ammonia are present in the cylinder?

$\left[\mathrm{N}-14,\mathrm{H}-1\right]$

Q.

What is the number of hydrogen atoms in hexyne?

1. 8

2. 10

3. 14

4. 12

Q.

An unsaturated hydrocarbon having triple covalent bond and has 50 hydrogen atoms. The number of carbon atoms in its molecule will be ____

1. $24$

2. $25$

3. $26$

4. $28$

Q.

In an alkyne compound, if the number of carbon atoms is five, then what is the number of hydrogen atoms in this compound?

1. 10

2. 8

3. 14

4. 12

Q. How many carbon-hydrogen single bond are present in ethyne?

1. Three
2. Two
3. One
4. Zero

Q.

Which formula represents peroxide?

1. H₂O

2. HO₂

3. Na₂O₂

4. HO

Q.

Carbon atoms have the unique ability to join together in long chains and rings. They form the backbones for the complex molecules ( carbohydrates, lipids, proteins, nucleic acids, etc )

1. True
2. False

Q. We know that the ionic bonds are more stronger than the covalent bond, so why it is slightly complicated to dissolve the covalent bonded compounds?

Q. Which compund will have same number of hydrogen as that of 2-Pentyne?

1. Cyclo Butane
   
2. Butene
   
3. Cyclo Pentane
   
4. Pentene

Q.

What is the name of the seventh member in the homologous series of the alkene group?

1. Heptene

2. Octene

3. Nonene

4. Hexene

Q. If a hydrocarbon contains three carbon atoms, then how many different arrangements of carbon skeletons are possible?

1. 2
2. 3
3. 1
4. None

Q. Structural isomers are compounds with same molecular formula and different structures but the same number of carbon atoms are present in the parent chain.

1. True
2. False

Q.

Find the alkyne among all the other alkanes in the given options.

1. $C_3{H}_8$

2. $C_4{H}_6$

3. $C_5{H}_{12}$

4. $C{H}_4$

Q.

What is the ratio of hydrogen atoms present in heptyne to that in butene?

1. $\frac{3}{2}$

2. $\frac{7}{4}$

3. $\frac{5}{2}$

4. $\frac{6}{5}$

Q. Compounds with single bond are stable than those with double or triple bonds.

1. True
2. False

Q. A molecule of an organic compound contains eight atoms of hydrogen. Its empirical formula contains two atoms of carbon , four atoms of hydrogen and one atom of oxygen[C2H4O]. What is its molecular weight ? (Write only the value of the answer - DO NOT write units ) .?*

Q.

Write the number of $\mathrm{C}$ and $\mathrm{H}$ atoms in a molecule of Decane.

Q.

The compound A has the following percentage composition by mass:

Carbon $26.7\%$, oxygen $71.1\%$, hydrogen $2.2\%$.

(b) If the relative molecular mass of A is $90$, what is the molecular formula of A?

Q.

The name for the compound whose image is given below is

1. Butene

2. Butyne

3. Cyclobutane

4. Butane

Q.

Select the option that will complete the given homologous series.

$C_3{H}_4$, $C_4{H}_6$, _______, $C_6{H}_{10}$, $C_7{H}_{12}$

1. $C_5{H}_6$

2. $C_5{H}_8$

3. $C_5{H}_{10}$

4. $C_5{H}_{12}$

Q. which of the following is not a chiral compound? (1)hexane (2)n-butane (3)methane (4)2, 3, 4-trimethylhexane

Q. Total number of atom in one molecule of sulfur is____.

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

Q.

Alkenes and alkynes are unsaturated compounds.

1. True

2. False

Q.

The organic compounds having the same molecular formula but different structures are known as ..........

1. Isomers

2. Isotopes

3. Isotones

4. Isobars

Q. What is the relation between the Bond order and the strength and stability of a bond? Is it inversely proportional or directly proportional?

Q.

What is the ratio of hydrogen atoms present in heptyne to that in butene?

1. $\frac{3}{2}$

2. $\frac{7}{4}$

3. $\frac{5}{2}$

4. $\frac{6}{5}$