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Hydrocarbons

230276 In the reaction.
${CHCl}_{3} + 4 {OH}^{-} ⟶ {HCOO}^{-} + 2 H_{2} O$
The intermediate species formed is/are

1

{CCl}_{2}

2

{CCl}_{2}^{-}

3 Both (a) and (b)

4 None of the above

Explanation:

: ${CHCl}_{3} + {OH}^{-} \to: {CCl}_{3}^{G} \overset{- {Cl}^{-}}{⟶} : {CCl}_{2}$
original image

UPTU/UPSEE-2014

Hydrocarbons

230277 Octane number of petrol can be improved by admixing it with which of the following chemicals?

1

{Et}_{4} Pb

2

{CH}_{3} OC {({CH}_{3})}_{3}

3 1-methyl naphthalene

4 Pyrene

Explanation:

,b) : Octane number of petrol can be increased by adding some small amount of certain chemicals known as anti-knock agent or compound. e.g - TEL or ${Et}_{4} Pb$ . In the modern days some special types of antiknock agents are used to increase the octane number of petrol by increasing the number of carbons in the chain known as methyltert-butyl ether ${CH}_{3} OC {({CH}_{3})}_{3}$ . Hence, the option A and B are correct.

UPTU/UPSEE-2011

Hydrocarbons

230279 Which of the following compounds would have the highest boiling point?

1

{CH}_{3} {CH}_{2} {CH}_{2} {CH}_{3}

2

{CH}_{3} {NH}_{2}

3

{CH}_{3} OH

4

{CH}_{2} F_{2}

Explanation:

: ${CH}_{3} OH$ (methanol) has highest boiling point because there is a intermolecular hydrogen bonding in methanol and high electronegative of $O$ -atom, is strong. Therefore, ${CH}_{3} OH$ has the highest boiling point.

UPTU/UPSEE-2009

Hydrocarbons

230280 Mustard gas is a

1 Oil gas

2 Poisonous gas

3 Fuel gas

4 Life gas

UPTU/UPSEE-2009

Hydrocarbons

230276 In the reaction.
${CHCl}_{3} + 4 {OH}^{-} ⟶ {HCOO}^{-} + 2 H_{2} O$
The intermediate species formed is/are

1

{CCl}_{2}

2

{CCl}_{2}^{-}

3 Both (a) and (b)

4 None of the above

Explanation:

: ${CHCl}_{3} + {OH}^{-} \to: {CCl}_{3}^{G} \overset{- {Cl}^{-}}{⟶} : {CCl}_{2}$
original image

UPTU/UPSEE-2014

Hydrocarbons

230277 Octane number of petrol can be improved by admixing it with which of the following chemicals?

1

{Et}_{4} Pb

2

{CH}_{3} OC {({CH}_{3})}_{3}

3 1-methyl naphthalene

4 Pyrene

Explanation:

,b) : Octane number of petrol can be increased by adding some small amount of certain chemicals known as anti-knock agent or compound. e.g - TEL or ${Et}_{4} Pb$ . In the modern days some special types of antiknock agents are used to increase the octane number of petrol by increasing the number of carbons in the chain known as methyltert-butyl ether ${CH}_{3} OC {({CH}_{3})}_{3}$ . Hence, the option A and B are correct.

UPTU/UPSEE-2011

Hydrocarbons

230279 Which of the following compounds would have the highest boiling point?

1

{CH}_{3} {CH}_{2} {CH}_{2} {CH}_{3}

2

{CH}_{3} {NH}_{2}

3

{CH}_{3} OH

4

{CH}_{2} F_{2}

Explanation:

: ${CH}_{3} OH$ (methanol) has highest boiling point because there is a intermolecular hydrogen bonding in methanol and high electronegative of $O$ -atom, is strong. Therefore, ${CH}_{3} OH$ has the highest boiling point.

UPTU/UPSEE-2009

Hydrocarbons

230280 Mustard gas is a

1 Oil gas

2 Poisonous gas

3 Fuel gas

4 Life gas

UPTU/UPSEE-2009

Hydrocarbons

230276 In the reaction.
${CHCl}_{3} + 4 {OH}^{-} ⟶ {HCOO}^{-} + 2 H_{2} O$
The intermediate species formed is/are

1

{CCl}_{2}

2

{CCl}_{2}^{-}

3 Both (a) and (b)

4 None of the above

Explanation:

: ${CHCl}_{3} + {OH}^{-} \to: {CCl}_{3}^{G} \overset{- {Cl}^{-}}{⟶} : {CCl}_{2}$
original image

UPTU/UPSEE-2014

Hydrocarbons

230277 Octane number of petrol can be improved by admixing it with which of the following chemicals?

1

{Et}_{4} Pb

2

{CH}_{3} OC {({CH}_{3})}_{3}

3 1-methyl naphthalene

4 Pyrene

Explanation:

,b) : Octane number of petrol can be increased by adding some small amount of certain chemicals known as anti-knock agent or compound. e.g - TEL or ${Et}_{4} Pb$ . In the modern days some special types of antiknock agents are used to increase the octane number of petrol by increasing the number of carbons in the chain known as methyltert-butyl ether ${CH}_{3} OC {({CH}_{3})}_{3}$ . Hence, the option A and B are correct.

UPTU/UPSEE-2011

Hydrocarbons

230279 Which of the following compounds would have the highest boiling point?

1

{CH}_{3} {CH}_{2} {CH}_{2} {CH}_{3}

2

{CH}_{3} {NH}_{2}

3

{CH}_{3} OH

4

{CH}_{2} F_{2}

Explanation:

: ${CH}_{3} OH$ (methanol) has highest boiling point because there is a intermolecular hydrogen bonding in methanol and high electronegative of $O$ -atom, is strong. Therefore, ${CH}_{3} OH$ has the highest boiling point.

UPTU/UPSEE-2009

Hydrocarbons

230280 Mustard gas is a

1 Oil gas

2 Poisonous gas

3 Fuel gas

4 Life gas

UPTU/UPSEE-2009

Hydrocarbons

230276 In the reaction.
${CHCl}_{3} + 4 {OH}^{-} ⟶ {HCOO}^{-} + 2 H_{2} O$
The intermediate species formed is/are

1

{CCl}_{2}

2

{CCl}_{2}^{-}

3 Both (a) and (b)

4 None of the above

Explanation:

: ${CHCl}_{3} + {OH}^{-} \to: {CCl}_{3}^{G} \overset{- {Cl}^{-}}{⟶} : {CCl}_{2}$
original image

UPTU/UPSEE-2014

Hydrocarbons

230277 Octane number of petrol can be improved by admixing it with which of the following chemicals?

1

{Et}_{4} Pb

2

{CH}_{3} OC {({CH}_{3})}_{3}

3 1-methyl naphthalene

4 Pyrene

Explanation:

,b) : Octane number of petrol can be increased by adding some small amount of certain chemicals known as anti-knock agent or compound. e.g - TEL or ${Et}_{4} Pb$ . In the modern days some special types of antiknock agents are used to increase the octane number of petrol by increasing the number of carbons in the chain known as methyltert-butyl ether ${CH}_{3} OC {({CH}_{3})}_{3}$ . Hence, the option A and B are correct.

UPTU/UPSEE-2011

Hydrocarbons

230279 Which of the following compounds would have the highest boiling point?

1

{CH}_{3} {CH}_{2} {CH}_{2} {CH}_{3}

2

{CH}_{3} {NH}_{2}

3

{CH}_{3} OH

4

{CH}_{2} F_{2}

Explanation:

: ${CH}_{3} OH$ (methanol) has highest boiling point because there is a intermolecular hydrogen bonding in methanol and high electronegative of $O$ -atom, is strong. Therefore, ${CH}_{3} OH$ has the highest boiling point.

UPTU/UPSEE-2009

Hydrocarbons

230280 Mustard gas is a

1 Oil gas

2 Poisonous gas

3 Fuel gas

4 Life gas

UPTU/UPSEE-2009

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