Hybridisation in Carbon

Q.

The above reaction proceeds through

1. Nucleophilic substitution

2. Electrophilic substitution

3. More than one of the above processes

4. Free radical substitution

Q. The total number of pi-bonds in $C{H}_2=CH-CH=CH-C\equiv CH$ are ______.

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

Q.

Which of the following is a polar compound?

1. C₂H₆

2. HCl

3. CCl₄

4. CH₄

Q.

The addition of $HCl$ to vinyl chloride gives 1, 1-dichloroethane because of?

1. Mesomeric effect of $Cl$

2. Inductive effect of $Cl$

3. Restricted rotation around double bond

4. None of these

Q. Shape of the methane molecule is ________.

1. square planar
2. tetrahedral
3. trigonal planar
4. pyramidal

Q.

Conversion of $C{H}_4$ to $C{H}_{3}Cl$ is an example of which of the following reaction?

1. Electrophilic substitution

2. Free radical addition

3. Free radical addition

4. Free radical substituion

Q.

Which of the following statements is not characteristic of free radical chain reactions?

1. It is usually sensitive to change in solvent polarity

2. It may be initiated by U.V. light

3. It gives major product derived from most stable free radical

4. It proceeds in three main steps like initiation, propagation and termination

Q. Each carbon atom in benzene is in which state of hybridization?

1. sp³

2. sp²

3. sp

4. s³p

Q.

Number of ${}^{\pi }$ electrons in cyclobutadienyl anion $(C_4{H}_4{)}^{-2}$ is?

1. 4

2. 6

3. 2

4. 8

Q.

Which of the following can't be used in Friedal Craft's reactions?

1. FeCl₃

2. FeBr₂

3. AlCl₃

4. NaCl