Organic Chemistry Some Basic Principles and Techniques Test

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Organic Chemistry Some Basic Principles and Techniques Test - 53

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Weekly Quiz Competition

Question 1
1 / -0

$$CO + NaOH \rightarrow ?$$

A
$$HCOONa$$

B
$$C_2H_2O_4$$

C
$$HCOOH$$

D
$$CH_3COOH$$

Solution

$$CO+NaOH \xrightarrow[]{\Delta }HCOONa$$
Option A is correct.
Question 2
1 / -0

How many $$\pi$$ bonds are present in naphthalene molecule?

A
$$3$$

B
$$4$$

C
$$5$$

D
$$6$$

Solution

$$5\pi$$ bonds are present in naphthalene.
Question 3
1 / -0

Which of the following is azo-group

A
$$ -N= $$

B
$$ -N=N- $$

C
$$ -NH- $$

D
$$ -CO-NH- $$

Solution

ago group is $$RN= RN$$
so correct match the group is option B is
Question 4
1 / -0

Ethylene possess

A
two sigma and two pi bonds

B
two pi bonds

C
five sigma and one pi bond

D
four sigma and one pi bond

Solution

Ethylene possess $$5\sigma$$ and $$1\pi$$ bond.
Question 5
1 / -0

Cresol has

A
Alcoholic OH

B
Phenolic OH

C
$$ -COOH $$

D
$$ -CHO $$

Solution

Cresols are organic compounds in which methyl and hydroxyl groups are directly attached to the benzene ring.
Hence, option $$B$$ is correct.
Question 6
1 / -0

Which of the following do not contain an acyl group?

A
Acid chloride

B
Amide

C
Ester

D
Ether

Solution

Acid chloride is $$RCOCl$$, Amide is $$RCONH_2$$, Ester is $$RCOOR$$, and ether is $$ROR$$.
Acyl group has the formula $$RCO-$$. Hence, ether do not contain acyl group.
Option $$D$$ is correct.
Question 7
1 / -0

Number of $$\sigma$$ and $$\pi$$ bonds present in 1-buten-3-yne respectively are

A
$$7\sigma, 3\pi$$

B
$$5\sigma, 2\pi$$

C
$$8\sigma, 3\pi$$

D
$$6\sigma, 2\pi$$

Solution
Question 8
1 / -0

A carbon-carbon triple bond in ethyne $$(-C\equiv C-)$$ consists of

A
All $$\sigma$$ bonds

B
Two $$\sigma$$ bonds and one $$\pi-$$ bonds

C
One $$\sigma$$ bonds and two $$\pi-$$ bonds

D
All $$\pi$$ bonds

Solution

A carbon-carbon triple bonds consist of one $$\sigma$$ bond and $$2\pi-$$ bonds.
Question 9
1 / -0

The number of $$\pi$$ bonds in 3-hexyne-1-ene is

A
$$1$$

B
$$2$$

C
$$3$$

D
$$4$$

Solution

$$\overset{1}{CH_2}\overset{1\ \pi}=\overset{2}{CH}-\overset{3}{C}\overset{2\ \pi}{\equiv} \overset{4}{C}-\overset{5}{CH_2}-\overset{6}{CH_3}$$
3-hexyne-1-ene

The number of $$\pi$$ bonds in 3-hexyne-1-ene is 3.
Question 10
1 / -0

Alchols may be represented by the general formula:

A
$$ C_{n}H_{2n+2}OH $$

B
$$ C_{n}H_{2n}OH $$

C
$$ C_{n}H_{2n+1}OH $$

D
$$ C_{n}H_{2n-1}OH $$

Solution

One of the H atoms of alkanes (having the molecular formula $$ C_{n}H_{2n+2} $$) is replaced by an $$-OH$$ group to form alcohols.
Thus $$ C_{n}H_{2n+2}-(1H)+(1-OH)\rightarrow C_{n} H_{2n+1}OH $$

Option C is the correct answer.

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Organic Chemistry Some Basic Principles and Techniques Test - 53

Result

Organic Chemistry Some Basic Principles and Techniques Test - 53

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SHARING IS CARING

Question 1

$$HCOONa$$

$$C_2H_2O_4$$

$$HCOOH$$

$$CH_3COOH$$

Solution

Question 2

$$3$$

$$4$$

$$5$$

$$6$$

Solution

Question 3

$$ -N= $$

$$ -N=N- $$

$$ -NH- $$

$$ -CO-NH- $$

Solution

Question 4

two sigma and two pi bonds

two pi bonds

five sigma and one pi bond

four sigma and one pi bond

Solution

Question 5

Alcoholic OH

Phenolic OH

$$ -COOH $$

$$ -CHO $$

Solution

Question 6

Acid chloride

Amide

Ester

Ether

Solution

Question 7

$$7\sigma, 3\pi$$

$$5\sigma, 2\pi$$

$$8\sigma, 3\pi$$

$$6\sigma, 2\pi$$

Solution

Question 8

All $$\sigma$$ bonds

Two $$\sigma$$ bonds and one $$\pi-$$ bonds

One $$\sigma$$ bonds and two $$\pi-$$ bonds

All $$\pi$$ bonds

Solution

Question 9

$$1$$

$$2$$

$$3$$

$$4$$

Solution

Question 10

$$ C_{n}H_{2n+2}OH $$

$$ C_{n}H_{2n}OH $$

$$ C_{n}H_{2n+1}OH $$

$$ C_{n}H_{2n-1}OH $$

Solution

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