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The $C - O - H$ bond angle in alcohols is slightly less than the tetrahedral angle whereas the $C - O - C$ bond angle in ether is slightly greater because

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Important Questions on Alcohols, Phenols and Ethers

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

A flask contains a mixture of isohexane and

3

-methylpentane. One of the liquids boils at

63^{o} C

while the other boils at

60^{o} C .

What is the best way to separate the two liquids and which one will be distilled out first?

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

One mole of an ideal gas passes through a process where pressure and volume obey the relation

P = P_{o} [1 - \frac{1}{2} {(\frac{V_{o}}{V})}^{2}]

. Here

P_{o}

and

V_{o}

are constants. Calculate the change in the temperature of the gas if its volume changes from

V_{o}

2 V_{o}

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

The plot that depicts the behavior of the mean free time

τ

(time between two successive collisions) for the molecules of an ideal gas, as a function of temperature

(T),

qualitatively, is: (Graphs are schematic and not drawn to scale)

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true ?

(A) the mean free path of the molecules decreases

(B) the mean collision time between the molecules decreases.

(D) the mean collision time remains unchanged.

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

An ether is more volatile than an alcohol having the same molecular formula due to

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

a + \frac{1}{a} = 8, t h e n a^{3} + \frac{1}{a^{3}} = ?

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

The specific heats,

C_{p}

and

C_{v}

of a gas of diatomic molecules,

A,

are given (in units of

J m o l^{- 1} K^{- 1}

) by

29

and

22,

respectively. Another gas of diatomic molecules,

B,

has the corresponding values

30

and

21 .

If they are treated as ideal gases, then:

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Consider two separate ideal gases of electrons and protons having same number of particles. The temperature of both the gases are same. The ratio of the uncertainty in determining the position of an electron to that of a proton is proportional to:

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Straight lines

x - y = 7

and

x + 4 y = 2

intersect at

B .

Points

A

and

C

are so chosen on these two lines such that

A B = A C .

The equation of line

A C

passing through

(2, - 7)

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

An ideal gas is enclosed in a cylinder at pressure of

2

atm and temperature,

300 K .

The mean time between two successive collisions is

6 \times 10^{- 8} s .

If the pressure is doubled and temperature is increased to

500 K,

the mean time between two successive collisions will be close to:

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

An ether is more volatile than alcohol having the same molecular formula. This is due to

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

The correct order of boiling points of below compounds is
Question Image

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

The maximum area of a rectangle inscribed in the circle

{(x + 1)}^{2} + {(y - 3)}^{2} = 64

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Two gases - argon (atomic radius

0.07 n m,

atomic weight

40

) and xenon (atomic radius

0.1 n m,

atomic weight

140

) have the same number density and are at the same temperature. The ratio of their respective mean free times is closest to:

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Let

f (x)

be a polynomial in

x

. Then the second derivative of

f (e^{x})

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Identify the incorrect statement from the following.

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Given

f (x) = x^{3} - 4 x

, if

x

changes from

2

1.99

, then the approximate change in the value of

f (x)

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Let

f (x) = 1 + \frac{x}{1!} + \frac{x^{2}}{2!} + \frac{x^{3}}{3!} + \frac{x^{4}}{4!}

. The number of real roots of

f (x) = 0

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

The compound with maximum vapour pressure at a given temperature is

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Physical Properties of Ethers

Which of the following has the lowest boiling point?

The C–O–H bond angle in alcohols is slightly less than the tetrahedral angle whereas the C–O–C bond angle in ether is slightly greater because

Important Questions on Alcohols, Phenols and Ethers

Learn and Prepare for any exam you want !

The $C - O - H$ bond angle in alcohols is slightly less than the tetrahedral angle whereas the $C - O - C$ bond angle in ether is slightly greater because