Question # 1

Which one of the following organic acids is made fork methanol?

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propanoic acid

butanoic acid

formic acid

acetic acid

The gecko a small lizard can up a smooth glass window the gecko has millions of microscopic hairs on its toes and each hair has thousand of pads at its tip the result is that the molecules in the pad are extremely close to the glass surface on which the gecko is climbing.

What is the attraction between the gecko is climbing.

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co-ordinate bonds

covalent bonds

ionic bonds

van der Waals forces

Which of the following is basic amino acid

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Lysine

Histidne

Proline

Both a and b

The high molecular weight materials which yield on hydrolysis the amino acids is called:

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Carbohydrates

Lipids

Fatty acids

Proteins

Chlorination of water is effective for

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Killing pathogens

Removing dust

Removing hardness

Increasing oxygen content

Essential alpha-amino acids are those which are necessary in the diet.

Which one is an essential alpha-amino acids

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Alanine

Aspartic acid

Glycine

Tryptophan

Iodine value of an oil or fat may be defined as

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the number of grams of iodine taken up by 1 g of the oil or fat

the number of grams if iodine taken by 10 g of the oil or fat

the number of grams of iodine taken by 100 g of the oil or fat

none of the above

Lithosphere has amount of silicon:

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35.30%

27.72%

40.01%

21.13%

The value of oxidation number of chlorine in HCIOs is

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+7

+5

-1

+3

The proteins which are derived by conjugated proteins are called as

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Simple protein

Complex protein

Derived protein

None

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBh₄or LiAH₄?

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1-Propanol

2-Propanol

2-Methyl2-Proponal

Ethanol

Who rejected the vital force theory

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Wholer

Fisher

Newton

Lewis

Alkanes normally have ______ hybridization

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Sp

Sp²

Sp³

d sp³

A buffer of a 0.09 molar acetic acid and 0.11 molar sodium acetate has pH = 4.83. If 0.01 mole NaOH in 1 dm³of the buffer solution is added, then pH of the buffer becomes

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4.74

4.92

5.0

4.0

Which of the following favours the reverse reaction in chemical equilibrium?

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Increasing the concentration of the reactant

Removal of the least one of the products at regular intervals

Increasing the concentration of one or more of the products

None of these

Which one of the following statements about glucose and sucrose is incorrect?

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Both are soluble in water

Both are naturally occuring

Both are carbohydrates

Both are disaccharides

Which is mild oxidizing agent ?

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Tollen's reagent

KMnO₄ / H₂SO₄

K₂Cr₂O₇ / H₂SO₄

HNO₃

A polymer may be

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Linear

Branched

Cross linked

All of these

When SO₂is passed through acidified K₂Cr₂O₇solution

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The solution turns blue

The solution is decolourised

SO₂is reduced

Green Cr₂(SO₄)₃is formed

Which of the following statements is incorrect about vitamins

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Often function as coenzymes

Molecules contain at least one ring structure

Are often synthesized by the body

Are polyfunctional compounds

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