Question # 1

In which group, melting point and boiling point increase downward in a group

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IA

II A

VII A

Both a and b

Which sugar is called milk sugar

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Glucose

Fructose

Lactose

Maltose

The percentage of nitrogen in urea is.

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36%

46%

56%

65%

What is Glacial acetic acid

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Pure acetic acid

95% acetic acid

a mixture of acetic acid and glycerol

Vinegar

Which of the following the highest hydration energy

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Li⁺

Na⁺

K⁺

Mg⁺⁺

Phenol when distilled with zinc dust gives.

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Toluene

Benzaldehyde

Benzoic acid

Benzene

The word paper is derived from the name of which reedy plant

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Rose

Sun flower

Papyrus

Water

Group VI-B of transition elements contains

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Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

Electron affinity is measure of energy

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Required to remover the electron

Released by adding an electron

Required to excite an electron

Released by removing an electron

Which one of the following gases is used welding purpose usualy.

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Methane

Ethane

Ethene

Acetylene

Cholesterol is an important precursor in the biosynthesis of

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Sex harmonies

Adrenal hormones

Vitamin D

All of these

Which substance is water repellant and used in ceramic insulators.

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Asbestos

Lead compounds

Silicon carbide

silicones

Which one is not an argillaceous material.

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Clay

Shale

State

Gypsum

In which compound, the oxidation state of boron in not +3

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H2BO3

Ca2B2O11

Na2B4O7

Mg3B2

Dolomite is a carbonate of

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Be

Mg

Na

Ba

Which reagent will react with both aldehyde and ketones

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Grignard reagent

Tollen's reagent

Fehling's reagent

Benedict's reagent

Reverse of esterification is known as

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Trans esterification

Saponification

Hydrolysis

Neutralization

When ethyl bromide is heated with Ag2O the product formed is.

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Ethanol

Ethene

Ethanol

Di ethyl ether

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