Question # 1

Substances that tend to decrease the activity of enzymes are called:

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coenzymes

activators

inhibitors

apoenzyme

Soap is formed when triglyceride reacts with

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Caustic soda

Soda lime

Lime

Caustic potash

Dipole-dipole interaction are present in the

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atoms of the He gas

molecules of CCl4

molecules of solid iodine

molecules of :NH3

The largest item which is recycled is

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newspaper

plastic

aluminium

oil

Which of the following is precursor of T3 and T4

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Gaba

Dopa

B-Alanine

Di-iodotyrosine

Macromolecular hypothesis acceptance due to efforts of standinger came about in:

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1910

1920

1930

1940

Which is an intermediate in SN1 reaction

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Ethoxide ion

Carbocation

alkyl halide

alkene

C₆H₁₂O₆is molecular formula of:

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Glucose

Dextrose

Fructose

All of these

Which of the compounds cannot show positional isomerism?

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Alkanes

Alkenes

Alkynes

Alcohols

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

Newspaper can be recycled again and again by how many times?

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2

3

4

5

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

When two hydrogen atoms approach to form a chemical bond

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The repulsive forces dominate the attractive forces

The attractive forces, dominate the repulsive forces

The energy of atoms increases

The two atoms start ionization

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

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Carbon monoxide

Diamond

Ethane

Methane

How many cm³of 1 M H₂SO₄required to neutralize 10 cm³of 1 M NaOH

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2 cm³

2.5 cm³

5 cm³

10 cm³

Which of the following gives iodoform on heating with a solution of I₂containing Na₂CO₃?

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Ethyl alcohol

Acetone

Ethyl alcohol as well as acetone

Methyl alcohol

18 g glucose is dissolved in 90 g of water. The relative lowering vapor pressure is equal to :

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1/5

5.1

1/51

6

When the 6d orbital is completed the entering electron goes into

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7f

7 s

7 p

7 d

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

The process in which orbitals of different energies and shapes mix up with each other to give equivalent is called,

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Hybridization

Polymerization

Isomerisation

Carbonization

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

Generally electron affinities for elements in a period from left to right

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Decreases

Increases

Remain same

Increases alternatively

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