Question # 1

Which of the following is a reddish brown gas

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N₂O₃

NO₂

N₂O₃

N₂O₅

Which is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

Cholesterol is an important precursor in the biosynthesis of

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Sex harmonies

Adrenal hormones

Vitamin D

All of these

Kerosene oil is a mixture of hydrocarbon having carbon

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11 to 13

10 to 12

11 to 12

8 to 9

Which is the longest periodic table

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4

5

6

7

Chile saltpeter has the chemical formula

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NaNO3

KNO3

Na2B4O7

Na2CO3.H2O

Which of the following statement is correct

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Na atom is smaller than Na⁺

Na atom is larger than K atom

F atom is smaller than F^-

F atom is larger than F^-

Who gave the law of Triads in 1829?

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Dobereiner

Mosely

Newland

Mendeleev

The percentage of carbon is different types of iron products is in the order of.

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Cast iron > wrought iron > Steel

Wrought iron >Steel >Cast iron

Cast iron > Steel > Wrought iron

What is clinker

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Roasted calcareous material

Roasted argillaceous material

Roasted calcareous and argillaceous material

Roasted gyposum

The solution of which acid is used for seasoning of food.

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Which the correct statement

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Cl^-is smaller than Cl atom

Cl^-(Ion) and Cl (atom) are equal in size

Na⁺is smaller than Na atom

Na⁺is larger than Na atom

Iodine deficiency in diet is known to cause.

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Beri Beri

Goiter

Rickets

Night blindness

The oxides of beryllium are

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Basicity

Rancidity

Amphoteric

none of all

Which woody raw material is used for the manufacture of paper pulp.

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Cotton

Bagasse

Poplar

Rice straw

The pH of truly acidic rain is

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7-6.8

6.5-6

6-5.6

less than 5

Which substance shows very weak hydrogen bonding with water.

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Methanol

Ethanol

Diethyl ether

Benzene

An ester can be prepared by the reaction of.

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Two alcohols

Alcohol and an aldehyde

An alcohol and an organic acid

an acid and a ketone

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