Question # 1

Amino acid α-hydroxy carboxylic acid and

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CO₂ gas

H₂ gas

N₂ gas

NH₃ gas

Polycyclic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

BOD means

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Boron oxygen deuterium

Biochemical oxygen demand

Biochemical oxygen dissolved

Biochemical oxygen death

Which is not a component of environment?

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Biosphere

Lithosphere

Hydrosphere

None of these

Geometry of NH3 is

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^Tetrahedral

Square planer

Pyramidal

Linear

Under which condition CO has the maximum molar volume

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high T and P

Low T and High p

high T and low P

Low T and low P

Digestion of carbohydrates begins in the

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large intestine

Small intestine

Duoderium

Buccal cavity / mouth

Correct order of intermolecular forces

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Gas < liquid < solid

Liquid < gas < solid

Gas < liquid < solid

Gas = liquid = solid

solubility of carboxylic acids decreases in water with increase in molar mass because

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Bigger molecules are more polar

bigger molecules have bigger non-polar groups

bigger molecules make more hydrogen bonds

bigger molecules can form lesser hydrogen bonds/molecule

The destruction of the biological nature and activity of proteins by heat or chemical agent is called:

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Dehydration

Oxidation

Denaturation

Polymerization

The formation of PVC from vinyl chloride is an example of

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subtsitution reaction

addition polymerization

condensation polymerization

condensation reaction

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

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Chlorination, nitration, reducing

Nitration, chlorination, reducition

Nitration, reduction,chlorination

Nitration, reduction, acylation, chlorination, hydrolysis

Acetic acids react with PCI5 giving:

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Acetamide

Acetyl chloride

Alcohol

Ether

Phosphide ion has the electronic structure similar to that of

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Nitride ion

Fluoride ion

Sodium ion

Chloride ion

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

The conversion of chemical energy into electrical energy requires :

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Electrolytic cell

Galvanic cell

Voltaic cell

Both (b) and (c)

Which property is not present in Al?

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Reacts with acid

Reacts with bases

Changes litmus paper

Changes methyle orange colour

A compound is soluble in conc. H₂SO₄, it does not decolourise bromine in carbon tetrachloride but is oxidized by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is

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Primary alcohol

Tertiary alcohol

alkene

ether

In which molecule carbon atom is sp²hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

Rare earth elements are

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s-block elements

p-block elements

d-block elements

f-block elements

Reductive ozonolysis of benzene produces

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Acetone

Maleic anhydride

Phthalic acid

Glyoxal

An organic acdi having molecular formula C₂H₄O₂is

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Formic acid

Acetic acid

Oxalic acid

Propionic acid

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