Question # 1

Which gas has highest boiling points.

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He

Ne

Ar

Kr

An sp3- hybrid orbital contains.

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25% s- characters

50% s- characters

75% s- characters

100% s - characters

--------------- element forms an ion with charge 3⁺

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Beryllium

Aluminium

Carbon

Silicon

On heating aldehydes with Fehling's solution we get a precipitate whose colour is

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Pink

Black

Yellow

Brick red

The enzyme which bring about exchange of functional group between two compounds is called.

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Hydrolases

Transferase

Lyases

Ligases

Which nitrogen fertilizer make the soil acdic.

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Calcium nitrate

sodium nitrate

Potassium nitrate

Ammonium nitrate

Water will be considered polluted if it has dissolved oxygen.

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3ppm

4ppm

5ppm

6 ppm

Which sugar is called milk sugar

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Glucose

Fructose

Lactose

Maltose

Which of these polymers is an addition polymer

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Nylon 6, 6

polystyrene

Terylene

epoxy resin

Which one of the following elements has the largest second ionization energy.

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O

Na

F

Ne

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

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Stainless steel is

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Compound

An element

Mixture

100% pure iron

An aldehyde compound can be reduced to alkane by

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Wurtz reaction

Grignard reaction

Wolf Kishner reaction

Kolbe's reaction

Which one of the following is inorganic fertilizer.

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Manure

Urea

Ammonium nitrate

All of these

Cholesterol is an important precursor in the biosynthesis of

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Sex harmonies

Adrenal hormones

Vitamin D

All of these

Which is more basic

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RbOH

NaOH

KOH

Li OH

Which of the following acid can be used as a catalyst in Friedel Craft's reactions

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AlCl₃

HNO₃

BeCl₂

NaCl

Which reagent is used to reduce a carboxylic group to an alcohol

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N₂/ Ni

H₂/Pt

NaBH₄

LiAIH₄

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