Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is (A) More than 100 (B) Round about 100 (C) Between 50 and 100 (D) Less than 25

Tetraethyl lead is added to the petrol to increase its octane number,
because its octane number is
(A) More than 100
(B) Round about 100
(C) Between 50 and 100
(D) Less than 25
by

1 Answer

Answer :

(A) More than 100
by

Related questions

The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. (A) 3 (B) 300 (C) 3000 (D) 1000

Description : The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. (A) 3 (B) 300 (C) 3000 (D) 1000

Last Answer : (A) 3

Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes (A) Paralysis of muscles & loss of appetite (B) Nervous depression (C) Gastritis and diarrhea (D) All (A), (B) and (C)

Description : Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes (A) Paralysis of muscles & loss of appetite (B) Nervous depression (C) Gastritis and diarrhea (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Tetraethyl lead (TEL) is added to petrol to (a) prevent its freezing (b) increase its boiling point (c) increase its flash point (d) increase its anti-knocking rating

Description : Tetraethyl lead (TEL) is added to petrol to (a) prevent its freezing (b) increase its boiling point (c) increase its flash point (d) increase its anti-knocking rating

Last Answer : Ans:(d)

Which of the following is used to increase the anti-knocking property of petrol? (1) Tetramethyl lead (2) Tetraethyl lead (3) nimethyl lead (4) Triethyl lead

Description : Which of the following is used to increase the anti-knocking property of petrol? (1) Tetramethyl lead (2) Tetraethyl lead (3) nimethyl lead (4) Triethyl lead

Last Answer : (2) Tetraethyl lead Explanation: An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at ... engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.

Which of the following is used to increase the anti-knocking property of petrol ? (1) Tetramethyl lead (2) Tetraethyl lead (3) Trimethyl lead (4) Triethyl lead

Description : Which of the following is used to increase the anti-knocking property of petrol ? (1) Tetramethyl lead (2) Tetraethyl lead (3) Trimethyl lead (4) Triethyl lead 

Last Answer : Tetraethyl lead

Use of gasoline blend like tetraethyl lead in internal combustion engine a. increases the octane rating of the fuel b. allows engine to operate at higher compression ratio c. avoids auto-ignition of fuel d. all of the above

Description : Use of gasoline blend like tetraethyl lead in internal combustion engine a. increases the octane rating of the fuel b. allows engine to operate at higher compression ratio c. avoids auto-ignition of fuel d. all of the above

Last Answer : ANSWER d. all of the above

An antiknock for petrol is - (1) sodium hydroxide (2) ethanol (3) sodium benzoate (4) lead tetraethyl

Description : An antiknock for petrol is - (1) sodium hydroxide (2) ethanol (3) sodium benzoate (4) lead tetraethyl

Last Answer : (4) lead tetraethyl Explanation: The organic compound that is used as an antiknock agent in petroleum is tetraethyl lead. This is a lead based organic compound.

Mercaptans are (A) Low boiling sulphur compounds(B) Added in LPG cylinders to detect gas leakage by its smell(C) Undesirable in petrol, as they reduce its octane number(D) All (A), (B) and (C)

Description : Mercaptans are (A) Low boiling sulphur compounds (B) Added in LPG cylinders to detect gas leakage by its smell (C) Undesirable in petrol, as they reduce its octane number (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Tetra-ethyl lead is added in gasoline to (A) Increase its smoke point (B) Reduce gum formation(C) Reduce the pour point(D) Increase its octane numbe

Description : Tetra-ethyl lead is added in gasoline to (A) Increase its smoke point (B) Reduce gum formation (C) Reduce the pour point (D) Increase its octane numbe

Last Answer : (D) Increase its octane numbe

The quality of petrol is expressed in terms of – (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Description : The quality of petrol is expressed in terms of – (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Last Answer : (3) Octane number Explanation: Octane rating or octane number is a standard measure of the of the ignition quality of has (gasoline or petrol). Higher this number, the less ... premature burning in the combustioncharnber) when burnt in a standard (spark-ignition internal combustion) engine.

The quality of petrol is expressed in terms of (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Description : The quality of petrol is expressed in terms of (1) Cetane number (2) Gold number (3) Octane number (4) Added unlead compounds

Last Answer : Octane number

Which of the following is an additive used for improving the cetane number of diesel? (A) Tetraethyl lead (B) Tetramethyllead (C) Ethyl nitrate or acetone (D) None of these

Description : Which of the following is an additive used for improving the cetane number of diesel? (A) Tetraethyl lead (B) Tetramethyllead (C) Ethyl nitrate or acetone (D) None of these

Last Answer : (A) Tetraethyl lead

Phenols are added in gasoline to (A) Improve the octane number(B) Act as an antioxidant(C) Reduce its viscosity(D) Increase its pour point

Description : Phenols are added in gasoline to (A) Improve the octane number (B) Act as an antioxidant (C) Reduce its viscosity (D) Increase its pour point

Last Answer : (B) Act as an antioxidant

Presence of aromatics in (A) Diesel increases its cetane number (B) Kerosene increases its smoke point (C) Petrol increases its octane number (D) All (A), (B) and (C)

Description : Presence of aromatics in (A) Diesel increases its cetane number (B) Kerosene increases its smoke point (C) Petrol increases its octane number (D) All (A), (B) and (C)

Last Answer : (C) Petrol increases its octane number

In spark ignition engines, the knocking tendency can be decreased by a) decreasing compression ratio b) controlling intake throttle c) controlling ignition timing d) adding dopes like tetraethyl lead and ethylene dibromide

Description : In spark ignition engines, the knocking tendency can be decreased by a) decreasing compression ratio b) controlling intake throttle c) controlling ignition timing d) adding dopes like tetraethyl lead and ethylene dibromide

Last Answer : Answer: d Explanation: None.

Straight run petrol as compared to methyl/ethyl alcohol has (A) Lower calorific value (B) Lower octane number (C) Higher specific gravity (D) Higher ignition temperature

Description : Straight run petrol as compared to methyl/ethyl alcohol has (A) Lower calorific value (B) Lower octane number (C) Higher specific gravity (D) Higher ignition temperature

Last Answer : (B) Lower octane number

Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic (A) Cracking (B) Polymerisation (C) Reforming (D) Isomerisation

Description : Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic (A) Cracking (B) Polymerisation (C) Reforming (D) Isomerisation

Last Answer : (C) Reforming

Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil (A) Gives higher yield of petrol (B) Lower octane number of petrol (C) Higher sulphur content in the product (D) Higher gum forming material in petro

Description : Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil (A) Gives higher yield of petrol (B) Lower octane number of petrol (C) Higher sulphur content in the product (D) Higher gum forming material in petro

Last Answer : (A) Gives higher yield of petrol

__________ prohibits the use of alcohols directly in petrol engines. (A) Low octane number (B) High cost & availability (C) Low flash point (D) Low calorific value

Description : __________ prohibits the use of alcohols directly in petrol engines. (A) Low octane number (B) High cost & availability (C) Low flash point (D) Low calorific value

Last Answer : (B) High cost & availability

Antioxidants are added in petrol to (A) Impart colour to it, for easy identification (B) Minimise the gum formation (C) Prevent icing of the carburettor (D) Prevent the lead build up in engines

Description : Antioxidants are added in petrol to (A) Impart colour to it, for easy identification (B) Minimise the gum formation (C) Prevent icing of the carburettor (D) Prevent the lead build up in engines

Last Answer : (B) Minimise the gum formation

What is the quality rating for diesel fuel, similar to the octane number for petrol?

Description : What is the quality rating for diesel fuel, similar to the octane number for petrol?

Last Answer : Catane number

A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol

Description : A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of a) 75% iso-octane and 25% normal heptane b) 75% normal heptane and 25% iso-octane c) 75% petrol and 25% diesel d) 75% diesel and 25% petrol

Last Answer : Answer: a Explanation: None.

Octane number of petrol normally used in petrol engines is of the order of a. 20-30 b. 40-60 c. 60-70 d. 80-90

Description : Octane number of petrol normally used in petrol engines is of the order of a. 20-30 b. 40-60 c. 60-70 d. 80-90

Last Answer : ANSWER d. 80-90

Ignition quality of petrol is expressed by a. Octane number b. cetane number c. calorific value d. self-ignition temperature

Description : Ignition quality of petrol is expressed by a. Octane number b. cetane number c. calorific value d. self-ignition temperature

Last Answer : ANSWER a. Octane number

Can using a petrol with a higher octane rating than recommended provide any benefits?

Description : Can using a petrol with a higher octane rating than recommended provide any benefits?

Last Answer : Using a petrol with a higher octane rating than recommended may provide improved performance in some high-performance or high-compression engines, but generally does not provide any significant benefits in most engines.

What happens if you use a petrol with a lower octane rating than recommended for your engine?

Description : What happens if you use a petrol with a lower octane rating than recommended for your engine?

Last Answer : Using a petrol with a lower octane rating than recommended for your engine can cause knocking or pinging during combustion, which can damage the engine over time.

Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

Description : Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

Last Answer : Write the values of boiling temperature for cetane(diesel).iso-octane(petrol), Butane, Propane an methane fuel and write effect of it on its system.

The normal heptane(C7H16) is given a rating of ____________ octane number. a) 0 b) 50 c) 100 d) 120

Description : The normal heptane(C7H16) is given a rating of ____________ octane number. a) 0 b) 50 c) 100 d) 120

Last Answer : Answer: a Explanation: None.

How is the octane rating of petrol determined?

Description : How is the octane rating of petrol determined?

Last Answer : The octane rating of petrol is determined through a test that compares the fuel's resistance to knocking to that of a reference fuel, typically iso-octane and n-heptane.

What is the octane rating of petrol?

Description : What is the octane rating of petrol?

Last Answer : The octane rating of petrol is a measure of its resistance to knocking or pinging during combustion, and is typically between 87 and 93 in the United States.

What is low octane petrol?

Description : What is low octane petrol?

Last Answer : Low octane petrol has a lower octane rating than regular petrol, and may not be suitable for use in high-performance or high-compression engines.

What is high octane petrol?

Description : What is high octane petrol?

Last Answer : High octane petrol has a higher octane rating than regular petrol, and is designed for use in high-performance or high-compression engines.

What happens if you use the wrong octane petrol in your car?

Description : What happens if you use the wrong octane petrol in your car?

Last Answer : Using petrol with the wrong octane rating can cause knocking or pinging in the engine, which can lead to engine damage over time.

The economical diesel fuels have got octane rating varying from a) 30 to 50 b) 30 to 60 c) 20 to 30 d) 25 to 30

Description : The economical diesel fuels have got octane rating varying from a) 30 to 50 b) 30 to 60 c) 20 to 30 d) 25 to 30

Last Answer : b) 30 to 60

The colour of gasoline is an indication of its (A) Octane number (B) Lead susceptibility (C) Gum forming tendency & thoroughness of refining (D) None of these

Description : The colour of gasoline is an indication of its (A) Octane number (B) Lead susceptibility (C) Gum forming tendency & thoroughness of refining (D) None of these

Last Answer : (C) Gum forming tendency & thoroughness of refining

Octane number of 2, 2, 4 - trimethyl pentane is (A) 0 (B) 100 (C) In between 0 and 100 (D) More than 100

Description : Octane number of 2, 2, 4 - trimethyl pentane is (A) 0 (B) 100 (C) In between 0 and 100 (D) More than 100

Last Answer : (B) 100

Glycol is added to aviation gasoline because it (1) reduces evaporation of petrol (2) increases efficiency of petrol (3) prevents freezing of petrol (4) reduces consumption of petrol

Description : Glycol is added to aviation gasoline because it (1) reduces evaporation of petrol (2) increases efficiency of petrol (3) prevents freezing of petrol (4) reduces consumption of petrol

Last Answer : prevents freezing of petrol

The octane number of aviation gasoline may be (A) 79 (B) 87 (C) 97 (D) > 100

Description : The octane number of aviation gasoline may be (A) 79 (B) 87 (C) 97 (D) > 100

Last Answer : (D) > 100

Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as (A) α-methyl naphthalene (B) 2-2-4 tri methyl pentane (C) 1, 3 butadiene (D) Tetra methyl ethylene

Description : Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as (A) α-methyl naphthalene (B) 2-2-4 tri methyl pentane (C) 1, 3 butadiene (D) Tetra methyl ethylene

Last Answer : (B) 2-2-4 tri methyl pentane

Octane number of n-heptane is assumed to be (A) 100 (B) 0 (C) 70 (D) ∞

Description : Octane number of n-heptane is assumed to be (A) 100 (B) 0 (C) 70 (D) ∞

Last Answer : (B) 0

CONDENSED STRUCTURE OF THE FOLLOWING1. 5,5 – diethyl – 3,3 – dimethyl – 1 - octyne2. 2,4,4,6 – tetraethyl – 3,3 – nondiene3. 1,1,4,4 – tetramethylheptaneIDENTIFY IF ITS ALKANE ALKYNE ALKENE?

Description : CONDENSED STRUCTURE OF THE FOLLOWING1. 5,5 – diethyl – 3,3 – dimethyl – 1 - octyne2. 2,4,4,6 – tetraethyl – 3,3 – nondiene3. 1,1,4,4 – tetramethylheptaneIDENTIFY IF ITS ALKANE ALKYNE ALKENE?

Last Answer : ℤ.

Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to (A) Increase the yield of light distillates (B) Suppress coke formation (C) Enhance the octane number of gasoline (D) Reduce gum content in gasoline

Description : Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to (A) Increase the yield of ... coke formation (C) Enhance the octane number of gasoline (D) Reduce gum content in gasoline

Last Answer : (B) Suppress coke formation

Pick out the correct statement pertaining to catalytic cracking. (A) With increase in the reactor pressure, octane number of gasoline decreases (B) With increase in the reactor temperature, gasoline yield decreases for a given conversion (C) Percentage conversion increases with increase in the catalyst to oil ratio (D) All (A), (B) and (C)

Description : Pick out the correct statement pertaining to catalytic cracking. (A) With increase in the reactor pressure, octane number of gasoline decreases (B) With increase in the reactor temperature, gasoline yield decreases for a given ... with increase in the catalyst to oil ratio (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n octane into pure compounds each at 1 atm is (A) -2 RT ln 0.5 (B) -RT ln 0.5 (C) 0.5 RT (D) 2 RT

Description : The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n octane into pure compounds each at 1 atm is (A) -2 RT ln 0.5 (B) -RT ln 0.5 (C) 0.5 RT (D) 2 RT

Last Answer : (B) -RT ln 0.5

Octane numbers of motor gasoline used in India and America are respectively (A) 87 & 94 (B) 94 & 87 (C) 94 & 100 (D) 83 & 100

Description : Octane numbers of motor gasoline used in India and America are respectively (A) 87 & 94 (B) 94 & 87 (C) 94 & 100 (D) 83 & 100

Last Answer : (A) 87 & 94

The two reference fuel used for cetane rating are (a) Cetane and iso octane (b) Cetane and tetra ethyl lead (c) Cetance and n-heptane (d) Cetane and α- methyl naphthalene

Description : The two reference fuel used for cetane rating are (a) Cetane and iso octane (b) Cetane and tetra ethyl lead (c) Cetance and n-heptane (d) Cetane and α- methyl naphthalene

Last Answer : Ans : d

Which of the following contains high content of lead? (1) Coal (2) Cooking gas (3) High octane fuel (4) Low octane fuel

Description : Which of the following contains high content of lead? (1) Coal (2) Cooking gas (3) High octane fuel (4) Low octane fuel

Last Answer : High octane fuel

Glycol added to petrol acts as a/an __________ agent. (A) Anti-knocking (B) Anti-icing (C) Anti-gum forming (D) Dewaxing

Description : Glycol added to petrol acts as a/an __________ agent. (A) Anti-knocking (B) Anti-icing (C) Anti-gum forming (D) Dewaxing

Last Answer : (B) Anti-icing

37. Euro –II norm stipulate ‘sulphur’ level in diesel and petrol to be ... e) 400 ppm in diesel and 150 ppm in petrol. f) 350 ppm in diesel and 180 ppm in petrol. g) 100 ppm in diesel and 50 ppm in petrol. h) 350 ppm in diesel and 150 ppm in petrol.

Description : 37. Euro –II norm stipulate ‘sulphur’ level in diesel and petrol to be ... e) 400 ppm in diesel and 150 ppm in petrol. f) 350 ppm in diesel and 180 ppm in petrol. g) 100 ppm in diesel and 50 ppm in petrol. h) 350 ppm in diesel and 150 ppm in petrol.

Last Answer : h) 350 ppm in diesel and 150 ppm in petrol.

17. Euro –II norm stipulate ‘sulphur’ level in diesel and petrol to be ... a) 400 ppm in diesel and 150 ppm in petrol. b) 350 ppm in diesel and 180 ppm in petrol. c) 100 ppm in diesel and 50 ppm in petrol. d) 350 ppm in diesel and 150 ppm in petrol.

Description : 17. Euro –II norm stipulate ‘sulphur’ level in diesel and petrol to be ... a) 400 ppm in diesel and 150 ppm in petrol. b) 350 ppm in diesel and 180 ppm in petrol. c) 100 ppm in diesel and 50 ppm in petrol. d) 350 ppm in diesel and 150 ppm in petrol.

Last Answer : d) 350 ppm in diesel and 150 ppm in petrol.