Question # 1

Which compound is formed, when CH₃OH reach with CH₃- Mg -Br

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Ethane

Methane

Ethanol

Acetone

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

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Hydrolases

Transferase

Lyases

Ligases

Phosphorous helps the growth of

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root

leave

stem

seed

Which one of the following is inorganic fertilizer.

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Manure

Urea

Ammonium nitrate

All of these

Flavour of ethyl butyrate is

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Orange

Pine apple

Banana

Apricot

Laughing gas is chemically

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NO

NO₂

N₂O

N₄O₄

Ozone is mostly produced in

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Tropical region

North polar region

South polar region

Thermosphere zone of atmosphere

SN1 reaction usually occurs in

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All of these

Which is most difficult to be oxidized

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CH₃CHO

CH₃COCH₃

HCHO

C₂H₅CHO

The percentage of clay and liem stone in cement is in the ratio of.

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1 : 1

1 :2

1:3

3:1

Cyclic structure of benzene was proposed by

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Dewar

Faraday

Down

Kekule

Lead monoxide is

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Amphoteric

Neutral

Acidid

Basic

Dennturing of protein is

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Hydrolysis of protein

Unfolding of protein

Three dimensional twisting and folding of peptide chain

Developing hydrogen bonding in peptide chain

Typical transition element is

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Sc

CO

Ra

Y

Organic compound having fruity smell are

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Caboxylic acid

Alcohols

Ethers

Esters

Which of the following specie has the maximum number of unpaired electrons.

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O2

O2+

O2-

O2^-2

In which country first of all paper was invented

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USA

China

Egypt

Germany

CO₂H is a functional group as

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Alkoxy

Carbonyl

Carboxyl

Hydroxyl

Hydrogen bond is the strongest between the molecules of.

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HF

HCl

HBr

HI

The most ionic is

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HF

HCl

HBr

HI

------------- does not belong to Alkaline-Earth metals

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Be

Ra

Ba

Rn

Which of the following is a typical transition metal.

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Sc

Y

Ra

CO

The colour of transition metal complexes

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d-d transitions of electrons

paramagnetic nature of transition elements

ionization

loss of s-electron

Which of the following is a reddish brown gas

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N₂O₃

NO₂

N₂O₃

N₂O₅

The reaction between Cu and conc. H2SO4 produces

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SO3

SO2

H2

Cu + ions

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