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

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 
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1 Answer

Answer :

Tetraethyl lead
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Related questions

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.

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)

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.

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

Description : 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

Last Answer : (A) More than 100

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.

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)

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

The element present as an anti-knocking agent in petrol?

Description : The element present as an anti-knocking agent in petrol?

Last Answer : Lead

With increase in __________ Knocking tendency in a spark ignition petrol engine decreases. (A) Supercharging (B) Wall temperature (C) Compression ratio (D) Engine speed

Description : With increase in __________ Knocking tendency in a spark ignition petrol engine decreases. (A) Supercharging (B) Wall temperature (C) Compression ratio (D) Engine speed

Last Answer : Option D

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

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

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.

If petrol is used in a diesel engine a. higher knocking will occur b. efficiency will be low c. low power will be obtained d. black smoke will be produced

Description : If petrol is used in a diesel engine a. higher knocking will occur b. efficiency will be low c. low power will be obtained d. black smoke will be produced

Last Answer : ANSWER a. higher knocking will occur

Out of glucose, urea and dodecyl trimethyl ammonium chloride, which one forms micelles in aqueous solution above certain concentration ?

Description : Out of glucose, urea and dodecyl trimethyl ammonium chloride, which one forms micelles in aqueous solution above certain concentration ?

Last Answer : Ans. Dodecyl trimethyl ammonium chloride. 

Catalyst used in the production of high density polythene by low pressure Ziegler process is(A) Aluminium triethyl activated with TiCl4(B) Platinum(C) Molybdenum(D) Nickel

Description : Catalyst used in the production of high density polythene by low pressure Ziegler process is (A) Aluminium triethyl activated with TiCl4 (B) Platinum (C) Molybdenum (D) Nickel

Last Answer : (A) Aluminium triethyl activated with TiCl4

Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is (A) Ni (B) V2O5 (C) Fe (D) Aluminium triethyl combined with titanium tetrachloride

Description : Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is (A) Ni (B) V2O5 (C) Fe (D) Aluminium triethyl combined with titanium tetrachloride

Last Answer : (D) Aluminium triethyl combined with titanium tetrachloride

The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann elimination. Which of the following

Description : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann elimination. Which of the following

Last Answer : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann ... to accomplish this? A. B. C. D.

Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions:

Description : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions:

Last Answer : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions: A. B. C. D.

Erythromycin contains (A) Dimethyl amino sugar (B) Trimethyl amino sugar (C) Sterol and sugar (D) Glycerol and sugar

Description : Erythromycin contains (A) Dimethyl amino sugar (B) Trimethyl amino sugar (C) Sterol and sugar (D) Glycerol and sugar

Last Answer : A

Prominent foul smell of Karnal bunt is due to (A) Trienthyl amine (B) Trimethyl amine (C) Dimethyl amine (D) None

Description : Prominent foul smell of Karnal bunt is due to (A) Trienthyl amine (B) Trimethyl amine (C) Dimethyl amine (D) None

Last Answer : (B) Trimethyl amine

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

Erythromycin contains (A) Dimethyl amino sugar (B) Trimethyl amino sugar (C) Sterol and sugar (D) Glycerol and sugar

Description : Erythromycin contains (A) Dimethyl amino sugar (B) Trimethyl amino sugar (C) Sterol and sugar (D) Glycerol and sugar

Last Answer : (A) Dimethyl amino sugar

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.

The knocking tendency in CI engines increases with (a) Increase of coolant water temperature (b) Increase of temperature of inlet air (c) Decrease of compression ratio (d) Increase of compression ratio

Description : The knocking tendency in CI engines increases with (a) Increase of coolant water temperature (b) Increase of temperature of inlet air (c) Decrease of compression ratio (d) Increase of compression ratio

Last Answer : Ans :c

Which hydrocarbon molecule with eight carbons would produce the lowest octane number (i.e., the most knocking) when used as a fuel in automobile? (a) 2-Methyl-3,3-dimethylpentane (b) n-Octane (c) 2-Isopropylpentane (d) 2-Methylheptane

Description : Which hydrocarbon molecule with eight carbons would produce the lowest octane number (i.e., the most knocking) when used as a fuel in automobile? (a) 2-Methyl-3,3-dimethylpentane (b) n-Octane (c) 2-Isopropylpentane (d) 2-Methylheptane

Last Answer : n-Octane

Gasoline with an octane number of 90 is equivalent in knocking characteristics to a mixture of heptane and isooctane of the following composition : (a) 20% heptane + 80% isooctane (b) 90% heptane + 10% isooctane (c) 80% heptane + 20% isooctane (d) 10% heptane + 90% isooctane

Description : Gasoline with an octane number of 90 is equivalent in knocking characteristics to a mixture of heptane and isooctane of the following composition : (a) 20% heptane + 80% isooctane (b) 90% heptane + 10% isooctane (c) 80% heptane + 20% isooctane (d) 10% heptane + 90% isooctane

Last Answer : 10% heptane + 90% isooctane

A knocking sound is produced in the engine when the fuel (a) Burns fast (b) contains lubricating oil (c) Burns slow (d) contains water

Description : A knocking sound is produced in the engine when the fuel (a) Burns fast (b) contains lubricating oil (c) Burns slow (d) contains water

Last Answer : Burns fast

Stabilisation of gasoline (petrol) means (A) Removal of dissolved gases from it (B) Increasing its oxidation stability (C) Improving its lead susceptibility (D) Increasing its vapour pressure

Description : Stabilisation of gasoline (petrol) means (A) Removal of dissolved gases from it (B) Increasing its oxidation stability (C) Improving its lead susceptibility (D) Increasing its vapour pressure

Last Answer : (A) Removal of dissolved gases from it

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

Pick out the wrong statement. (A) Higher temperature is employed in visbreaking than in thermal cracking (B) Pyrolysis is a mild thermal cracking process (C) Lead susceptibility of petrol produced by catalytic process is more than that produced by thermal cracking (D) Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process

Description : Pick out the wrong statement. (A) Higher temperature is employed in visbreaking than in thermal cracking (B) Pyrolysis is a mild thermal cracking process (C) Lead susceptibility of ... Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process

Last Answer : (A) Higher temperature is employed in visbreaking than in thermal cracking (B) Pyrolysis is a mild thermal cracking process

Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes (A) Blood poisoning (B) Anaemia (C) Nervous system disorder (D) All (A), (B) & (C)

Description : Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes (A) Blood poisoning (B) Anaemia (C) Nervous system disorder (D) All (A), (B) & (C)

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

Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes (A) Blood poisoning (B) Anaemia (C) Nervous system disorder (D) All (A), (B) and (C)

Description : Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes (A) Blood poisoning (B) Anaemia (C) Nervous system disorder (D) All (A), (B) and (C)

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

What causes engine knocking?

Description : What causes engine knocking?

Last Answer : Engine knocking is caused by the premature detonation of fuel in the engine, which can lead to decreased performance and engine damage.

What is knocking in an engine?

Description : What is knocking in an engine?

Last Answer : Knocking is a type of engine noise that occurs when fuel ignites too early in the combustion process, causing pressure waves that can damage the engine.

Suppose you are playing Jenga, and an earthquake hits, knocking the tower down. Who wins?

Description : Suppose you are playing Jenga, and an earthquake hits, knocking the tower down. Who wins?

Last Answer : Whoever was the last to touch the tower. When I pull a piece, it is still stable to make it through an earthquake.

Who from Gondwanaland has arrived knocking on the Mansion door?

Description : Who from Gondwanaland has arrived knocking on the Mansion door?

Last Answer : Who, indeed, and how much?

Why so little chatter about the storm here on Fluther? It's headed right for me, here in Delaware. Is it in line to be knocking on your door too?

Description : Why so little chatter about the storm here on Fluther? It's headed right for me, here in Delaware. Is it in line to be knocking on your door too?

Last Answer : It sort of passed by, it was too far off the coast to do much. We just had a lot of wind and clouds.

What is this knocking/popping noise from inside my car?

Description : What is this knocking/popping noise from inside my car?

Last Answer : answer:Dear I really think it's time you buy a new car, lol. Anyways, this could be a lot of things. My immediate concerns are either your engine is knocking, or your motor mounts are going bad. If the ... tell, but there's some things to start worrying about, lol. But like I said new car time lol

What do you say when they come knocking at the door?

Description : What do you say when they come knocking at the door?

Last Answer : I tell them (I think) they are brainwashed and that I am not kidding.

Etiquette question: Would you ever enter someone else's bedroom without knocking?

Description : Etiquette question: Would you ever enter someone else's bedroom without knocking?

Last Answer : Never, never, never (unless it is a child who is 9 years old or younger.)

What law, if any, did this man violate by knocking on an armored car window?

Description : What law, if any, did this man violate by knocking on an armored car window?

Last Answer : I don’t know what specific law, but it seems reasonable there should be rules about approaching armored cars carrying who-knows-how-much money. Don’t mess with them! It’s always deemed suspicious, at least, I would think.

Any advice for knocking loose a stubborn pin?

Description : Any advice for knocking loose a stubborn pin?

Last Answer : Soak it in Kroil.

How do I go about talking to my landlord about entering without asking/knocking?

Description : How do I go about talking to my landlord about entering without asking/knocking?

Last Answer : answer:The laws covering this type of behavior vary widely from state to state. Talk to a local paralegal or Legal Aid. I would install a chain lock so that at the least when you are home he cannot get in without knocking.

Who's that knocking at the door?

Description : Who's that knocking at the door?

Last Answer : Perhaps it’s Paul McCartney. Do me a favor and open the door, and let ‘em in.

In today's Real Estate market what percentage under the seller's asking price would be reasonable to consider knocking off when making an offer on a house?

Description : In today's Real Estate market what percentage under the seller's asking price would be reasonable to consider knocking off when making an offer on a house?

Last Answer : answer:Largely depends on where you are—in California the question is “What should you offer over the asking price”, since the asking price is considered (even in this market) a minimum-bid. So, Twocatkitten, where do you hail from?

What sneaks through doors and windows without knocking? What heats an unlit stove? What gives the cat a snug place to rest? -Riddles

Description : What sneaks through doors and windows without knocking? What heats an unlit stove? What gives the cat a snug place to rest? -Riddles

Last Answer : The sun!

It’s unknown, although rumors at the time involved a cow knocking over a lantern in a barn.

Description : It’s unknown, although rumors at the time involved a cow knocking over a lantern in a barn.

Last Answer : Who led the first land expedition to the Pacific Coast?

how to feed my ginnypigit keeps knocking over the bowl?

Description : how to feed my ginnypigit keeps knocking over the bowl?

Last Answer : just feed it to him out your hand

why the dog is knocking

Description : Our Doberman is still knocking, what is it?

Last Answer : "still"? Take him to the vet - if I simplify it, it can be caused by injury, illness, nervousness ... I assume he's not cold.