Question # 1

The critical temperature of NH₃ is greater than CO₂ due to its:

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Greater polarity

Stable polarity

Lesser polarity

None of above

Albumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Globular protein

The pH range of the acid rain is:

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6.5 __ 6

Less than 5

8 __ 7.5

7 __ 6.5

1 gram formula refers to

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Amount in grams equivalent to 1 mole of a atom

Amount in grams equivalent to 1 mole of a covalent compound

Amount in grams equivalent to 1 mole of a ionic compound

Amount in grams equivalent to 1 mole of an ion

Chemical equilibrium involving reactants and products in more than one phase is called:

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Homogeneous

Heterogeneous

Dynamic

Static

Choose the crop for which ammonium nitrate is not used:

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paddy rise

cotton

wheat

sugar cane

Select the name of reedy plant from which word paper is derived:

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Sunflower

Water hyacinth

Papyrus

Rose

Acetylide can give back ethyne upon treatment with

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water

strong base

dil. Acid

weak base

The forces of attraction between the solid atoms of helium are

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hydrogen boding

coordinate covalent bond

covalent bond

London dispersion force

Which one is not related with evaporation

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Continuous

Cooling

Exothermic

Spontaneous

Substances that tend to decrease the activity of enzymes are called

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coenzyme

activators

inhibitors

apoenzyme

All are ortho & Para directing except

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X

OH

NR₃

NH₂

If a large number of amino acids (hundreds to thousands) are joined by peptide bonds, the resulting product is called

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Dipeptide

Tripeptide

Polypeptide

None of these

Formation of a cation is:

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Exothermic process

Non-endothermic process

Endothermic process

None of above

Number of elements in the first period of the periodic table are

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Two

Four

One

Eight

17.1 grams sucrose (C₁₂H₂₂O₁₁) dissolved in 250 cm³of solution. This has molarity

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0.1 M

0.2 M

0.01 M

0.02 M

Which of the following is an ortho-para directing group

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Which of the following undergoes uncleophilic substitution exclusively by S_N1 mechanism?

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Benzyl chloride

Ethyl chloride

Chlorobenzene

Isopropyl choride

The number of electron pairs shared in carbon tetrachloride molecule is

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2

3

4

1

When the rate of formation of reactants is equal to the rate of formation of products, this is known as

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Chemical reaction

Chemical equilibrium

Chemical kinetics

None

Acetamides are formed by the reaction of carboxylic acids with

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Acids

Bases

Salts

NH₃

Aldehydes are reduced to :

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Pri-alcohol

Sec-alcohol

Ter-alcohol

All of these

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