Question # 1

How magnesium reacts with water?

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In frozen ice water

With cold water

In with steam

In hot state

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

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

Which one among the following is not a good leaving group

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HSO4-

CI-

OH-

Br-

The hydrocarbon with maximum B.P is

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CH4

C6H14

C4H10

C2H6

The enthalpy change for the reaction C2H2 + 5/2 O2 --------> 2CO2 + H2O is known as enthalpy of

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Fomation of CO2

Fusion ofC2H4

Combustion of C2H4

Vaporization of C2H2

Which is the optimum temperature for the activity of enzyme

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20 - 35°C

10 - 15°C

55 - 70°C

35 - 55°C

For a chemical reaction in which one of the reactant also act as solvent, the order will be

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First order

Third order

Second order

pseudo-first order

An element that is not an essential par of proteins is

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O

N

H

S

Out of monochloro, monobromo and mongiodo derivatives of ethane, the mos reactive compound towards nucleophilic substitution will be

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C2H5Br

C2H5Cl

C2H5I

All are equally reactive

Combustion analysis is performed for the determination of

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Molar mass of the compound

Empirical formula of the compound

Structural formula of the substance

Mass of halogens present in organic compounds

Which one of the following elements is not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

When 0.1 g of magnesium is treated with an excess of hydrochloric acid, what volume of gas at room temperature and pressure will be produced

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10 cm³

25 cm³

48 cm³

100 cm³

The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:

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Hund's rule

Markownikov's rule

Pauli's Exclusion Principle

Auf bau Principle

Which of the following phosphorus is most reactive?

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Red phosphorus

White phosphorus

Scrlet phosphorus

Violet phosphorous

The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits

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Metamerism

Tautomerism

Enatiomerism

Geometrical isomerism

Acetic acid is manufactured by the fermentation of

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Ethanol

Methanol

Ethanal

Methanal

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

Which of the following discoveries resulted in a version of the Mendeleefs

periodic law

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The nucleus of atom by Rutherford

The elements polonium and radium by the Curies

Atomic numbers by Moseley

x-rays by Roentgen

The osmotic pressure of 1 m solution at 27°C is

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2.46 atm

24.6 atm

1.21 atm

12.1 atm

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

In the extraction of iron, slag is produced which is

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CO

FeSiO₃

MgSiO₃

CaSiO₃

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