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The decreasing order of rate of above reaction with nucleophile nu- is

CH₃O^– > HO^– > PhO^– > AcO^– 

Explanation:

If the nucleophilic atom or the centre is same, more basic the species stronger is the nucleophile. 

Here, the nucleophilic atom i.e. O is the same in all these species. This order can be easily explained on the general concept that a weaker acid has a stronger conjugate base.

It is fitted in the ignition system of engine. It is just like a step up transformer. The function of ignition coil is to convert 12 volt dc to around 22000 volts dc (low tension current in to high tension current) and supply to the spark plugs.

The valency of an element 1, atomic no. is 11.

Air filters keep the inside of the engine free of dust and insects. Replacing or cleaning air filter at the recommended interval to keep air flowing freely helps the car run well

The function of starting motor is to start the engine by drawing direct current (dc) from the battery. While cranking the engine with the help of the starting motor, it draws around 250 Amps of current from the battery for few seconds (4-5 sec.).

Sign convention: According to it: 

Object is always placed to the left of mirror. All distances are measured from the pole of the mirror. Distances measured in the direction of the incident ray are positive and distances measured in the direction opposite to that of the incident rays are negative. 

Mirror formula: \(\frac{1}{f}=\frac{1}{v}+\frac{1}{u}\) , where f= focal length of the mirror

v= image distance 

x= object distance

H₂ gas is formed when a metal react with an acid.

-CO functional group is called Ketone. 

1. Wear old clothes for this job. 

2. Soap dries fast. Wash one side at a time to keep the soap from drying on your car's paint. 

3. Wet and wring out your clothes before you dry, it will absorb water better. 

4. Do not use detergent, dish soap. Detergent, dish soap is designed for dishes. Use car wash soap only

The automobile sales person is a very important person in the sale and marketing of a vehicle. It is expected that a set of duties will be performed by this person. 

1. Sells/leases and delivers a minimum number of vehicle per month (target given by shop owner). 

2. Approaches, greets and offers assistance or direction to any customer who entersthe dealership. 

3. Assists customers in selecting a vehicle by asking questions and listening carefully to their responses. 

4. Explains fully the product performance, application and benefits.

KOH is base.

The number of groups in the modern periodic table is 18.

Fermentation of grade is chemical change. 

CH is Covalent Compound.

The innovation: Airbags have graduated from things that simply blast out of the dashboard to more advanced devices that protect you in a rollover, cushion your knee and adjust for smaller drivers. They can also determine the severity of the impact, your seat position and whether you're wearing a seat belt. 

What we did before: Relied on seat belts, if we wore them, to protect us. Which cars have them: All cars must have front airbags.

The approx pH value of NaOH is 14.

Sodium metal is deeped in Kerosene oil. 

In the reaction CuO + H₂ →Cu + H₂O, H₂ is oxidised.

The molecular formula of benzene is C₆H₆ 

Antacid of medicines is used for treating indigestion. 

The correct answer is Teflon.

• Teflon
  • It is a brand name for a synthetic chemical called polytetrafluoroethylene (PTFE).
  • It was first made in the 1930s to create a non-reactive, nonstick surface.
  • It’s known for its use in cookware, although it can also be used to coat other materials like wires or fabrics to make them waterproof. 
  • It is a suspected carcinogen, hormone disruptor, and reproductive toxin.
• Polyvinyl Chloride (PVC or Vinyl) is an economical and versatile thermoplastic polymer widely used in the building and construction industry to produce door and window profiles, pipes (drinking and wastewater), wire and cable insulation, medical devices, etc.
• Polystyrene is a versatile plastic used to make a wide variety of consumer products. As a hard, solid plastic, it is often used in products that require clarity, such as food packaging and laboratory ware.

The base of element classification by Mendal of Atomic mass. 

He is an element of group zero.

C₂H₄ hydrocarbon has a double bond.

The correct answer is Silk.

• Nylon
  • It is a plastic with super-long, heavy molecules built up of short, continually repeating sections of atoms.
  • These fibers are entirely synthetic, which means that they have no basis in organic material.
  • It used to make a variety of different types of apparel and consumer goods.
• Polyester
  • It is a synthetic fiber derived from coal, air, water, and petroleum.
  • It is a polymer primarily composed of compounds within the ester functional group.
  • This fabric is used in thousands of different consumer and industrial applications.
•  Acrylic
  • It is a transparent plastic material with outstanding strength, stiffness, and optical clarity.
  • It is easy to fabricate, bonds well with adhesives and solvents.
  • Common uses include lenses, acrylic nails, paint, security barriers, medical devices, LCD screens, etc.
• Silk
  • It is a natural protein fiber.
  • It is produced by certain insects and arachnids as a building material for cocoons and webs.
  • While other insects also produce silk-like substances, most of the world’s silk is derived from Bombyx mori larvae, which are worms that only live on mulberry trees.

Propane is a saturated hydrocarbon. 

IVA group of carbon and present in Periodic table. 

K₂SO₄ is salt. 

The process of coating iron with Zinc is called Corrosion. 

Hematite is the ore of Fe.

N₂ + 3H₂ ⇋ 2NH₃ is reversible reaction.

C₃H₈ is the molecular formula of Propane.

(OH)^– is liberated when base is disolved in water.

114 number are known element till now. 

Cinnabar is ore of Hg (Para).

If any element atomic number 12 then 2 will valency of that element.

Graphite allotrope of carbon is used in making of pencil.