Need for Nomenclature

Q. Propane has ___ covalent bonds.

1. ten
2. eight
3. six
4. nine

Q.

Which of the following hydrocarbons undergo addition reactions: ${\mathrm{C}}_2{\mathrm{H}}_6,{\mathrm{C}}_3{\mathrm{H}}_8,{\mathrm{C}}_3{\mathrm{H}}_6,{\mathrm{C}}_2{\mathrm{H}}_2$ and ${\mathrm{CH}}_4$?

Q.

The general formula of alkynes is_________.

Q.

What is the valency of Carbon: +4 or -4?

Q.

What is the valency of magnesium and chlorine in magnesium chloride?

Q.

Which element has?

twice as many electrons in its second shell as in its first shell?

Q. A carbon atom four electrons to complete its octet.

1. gains
2. loses
3. shares

Q.

What do you call a full valence shell?

Q.

Draw the structure of cyclohexane

Q.

Identify the term and substance for the type of reaction Alkene undergoes

Q. Which of the following is the common name of 2-methylpropane?

1. Isopropane
2. Secpropane
3. Isobutane
4. Secbutane

Q. __________ is the most stable compound amongst the following.

1. But-2-ene
2. Butane
3. But-1-yne
4. But-1-ene

Q.

Name the allotrope of carbon which has a hexagonal arrangement of atoms.

1. Graphite

2. Diamond

3. Coke

4. Coal

Q.

If the outer most shell of an atom has one to three electrons; it is generally a ________.

Q. Which of the following is a non-metal that belongs to group IV-A in the modern periodic table?

1. Hydrogen
2. Aluminium
3. Chlorine
4. Carbon

Q.

Answer the following question:

Why is graphite used for making lead pencils?

Q. Tick the correct statement regarding formation of ionic bonds.​

1. Ionic bond is formed due to transfer of electrons.​
2. Ionic bond is formed between two non-metals.​
3. Ionic bond is formed between a metal and non-metal.​
4. ${\mathrm{CaCl}}_2$ is an ionic compound.​

Q.

Which of the following shows variable valencies ?

1. $\mathrm{Na}$

2. $\mathrm{Mg}$

3. $\mathrm{P}$

4. $\mathrm{Cl}$

Q. How many carbon atoms are present in butene?

1. six
2. five
3. three
4. four

Q. Atoms tends to have eight electrons in the valence shell.

1. False
2. True

Q. Allotropes of fullerene contains how many carbon atom?

1. 60

Q.

Write the electronic configuration of Carbon.

Q. Two combining atoms having six valence electrons each will share electron pairs.

1. one
2. two
3. three
4. four

Q. What is the maximum number of hydrogen atoms required to attain the octet configuration by the carbon atom?

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

Q. Diamond has a rigid 3-D structure.

1. True
2. False

Q. (a) Give IUPAC names and formulae of an organic compound containing single bonds and the other containing a triple bond.
(b) Which of the following is the molecular formula of benzene?
C₆H₆, C₆H₁₀, C₆H₁₂, C₆H₁₄
(c) Which of the two has a branched chain : isobutane or normal butane?

Q. Match the given molecules with the number of electron pairs shared between their atoms.

1. one
2. two
3. three

Q. Acetylene contains a carbon-carbon :

1. single bond
2. double bond
3. triple bond
4. none of the above

Q. Copy and complete the following table which relates to three homologous series of hydrocarbons:

General Formulae	CnH2n	CnH2n − 2	CnH2n + 2
IUPAC name of the homologous series
Characteristic bond type			Single bone
IUPAC name of the first member of the series
Type of reaction with chlorine		Addition

Q. In the periodic table, carbon belongs to the category of _________.

1. metals
2. nonmetals
3. metalloids
4. noble gases