Question # 1

Which of the following best describes the shape and polarity of the carbon disulphide molecule?

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Bent and polar

Linear and non-polar

Pyramidal and polar

Bent and non-polar

Temperature required for the dehydration of ethanol into ethene in the presence of HaSOu is

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130°C

170°C

175°C

180°C

Storage form of iron

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Transferrin

Ferritin

Myosin

Actin

The boiling point of H2O is 100°C while that of C2H5-OH is 78.5C°. The reason is that:

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H2O molecules are small-sized

the bond angles at oxygen atom are different

C2H5-group is electron donating

the number of H-bonds are greater in H20, than C2H5-OH

Amount of cellulose produced by plants every year is _____ approximately

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100 billion tons

90billion tons

80 billion tons

70 billion tons

In which of the following a re dipole-dipole interaction present?

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molecules of CCL₄

molecules of solid iodine

molecules of NH₃

atoms of the helium gas

An amino acid exists in the form of Zwitter-ion Which has:

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one - ve charge

one + ve charge

two + ve carges

one + ve and one -ve

Carboxylic acid can be prepared from:

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Hydrolysis of alkyl nitrites

Reaction of CO₂with Gringard's reagent

Hydrolysis of esters

All of these

Helical structure of protein is stabilized by

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Peptide bond

Dipeptide bond

Van der wall's forces

Hydrogen bonding

Which one of the following metals can replace the Copper from aqueous solution of its salt more easily?

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Cd

Fe

Zn

Na

The alternate name of Glucose is

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Dextrose

Grape sugar

Blood sugar

All

Which of the following is a typical transition metal

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Sc

Y

Ra

Co

Oceans cove ______ percent of the surface of the earth

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60

70

80

97

Which of the following has highest first ionization potential?

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Carbon

Oxygen

Nitrogen

Boron

Which of the following does not react with phenyl hydrazine?

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Ethanol

Ethanal

Acetone

Acetophenone

Which of the following charge

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Li

Be

H

He

Alkali metals react violently with halogens to form

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Hydrides

Halides

Anyhydrides

None of these

Which is the derived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

Baking powder has which one of the following formula

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Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

At what pH glycine shows the structure H_3N⁺-- CH₂-- COOH

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2

7

10

14

The oxides of which of the following elements will be acidic in character

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Mg

Rb

Li

Cl

White P when boiled with strong solution of caustic soda produces

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Phosphine

Posh acid

Phosphorous acid

None

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