Question # 1

Which of the following is a molecular formula of vinyl acetate

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C₄H₆O₂

C₂H₄O₂

C₄H₆O₃

None of these

lonic bond is produced after complete transfer of

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nucleus

neutrons

electrons

protons

Formula of paltimic acid is:

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C₁₁H₂₂COOH

C₁₃H₂₇COOH

C₁₅H₃₁COOH

C₁₇H₃₅COOH

Phosphoprotein comes under the type of proteins

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Simple protein

Derived protein

Conjugated

Both A & B

Dipole-induced dipole forces are also called

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dipole-dipole forces

ion-dipole forces

Debye forces

London-dispersion forces

Dichlorodifluoromethane, CC/2F2 has been used in aeroso propellants and as a refrigerant.
Which statement helps to explain why dichlorodifluromethane is chemically inert ?

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The carbon-fluorine bond energy is large

The carbon-fluorine bond has a law polarity

Fluorine is highly electronegative

Fluorine compound are non-flammable

In a crystal the atoms are locate at the position of:

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infinite potential energy

minimum potential energy

Zero potential energy

maximum potential

The molecules of air don't settle down. This is due to:

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non-polar nature of gases

different molar mass

elastic collisions of gas molecules

pressure of dust particles in air

The substance used in the soil to provide element.Which are essential for plant growth are known as:

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manures

fertilizers

pesticides

additive

RNA is a polymer of a nucleotide which consist of three components. Which one is not the component in the nucleotide of an RNA

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D-Ribose

wracil base

prosphate group

thyamine base

For an ideal gas, number of mole in terms of its pressure P, temperature T and gas constant is

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PT/R

PRT

PV/RT

RT/P

Inter molecular forces in solid hydrogen are

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Covalent forces

Van der Waal forces or London dispersion forces

Hydrogen bonds

All of these

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Zn

H

S

O

The number of moles of NH₄CI dissolved in 500 cm³of its 15%, W/N solution is

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1 mole

1.4 mole

2.0 mole

2.4 mole

The percentage of H is the highest in

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CH₄

NH₃

H₂SO₄

C₆H₁₂O₆

How is the secondary structure of protein stabilized

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Through hydrogen bonding

Through ionic bonding

Through van der wall forces

Through covalent bonding

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

The three N - Hσ-bonds are made by

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sp³- s overlap

sp²- s overlap

P - p overlap

sp - overlap

Out of Cu, Ag, Fe and Zn the metal which can displace all others from theri salt solution is

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Ag

Cu

Zn

Fe

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

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Wurtz reaction

Frankland's reaction

Cannizaro reaction

Kalobe's reaction

Components of environment are:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Lithium reacts with air to form

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Peroxide

Normal oxide

Superoxide

None of these

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