Question # 1

In a period, from left to right in the periodic table, the size of atom generally.

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Increases

decreases

Remains constant

First increase upto the middle of period and then decreases

How much fresh water is used for domestic purpose

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8%

23%

69%

100%

Grignard reagent is reactive due to

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The presence of halogen atom

The presence of Mg atom

The polarity of C -Mg bond

None of the above

The electrophile in Aromatic sulphonation is

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H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Prilling is a process in which

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Concentration of urea is increased

Water is removed from urea

Molten urea is converted to solid drop

Some other ingredients are added to urea

Alkyl halides are considered to be very reactive compounds towards nucleophile because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bed leaving group

They have a nucleophilic carbon and a good leaving group

Group VI-B of transition elements contains

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Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

The ore CaSO4.2H2O has the general name.

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Gypsum

dolomite

Calcite

Epsom salt

Elimination biomolecular reactions involve.

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First order kinetics

Second order kinetics

third order kinetics

Zero order kinetics

Which one of the following is not steroid

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Cholesterol

Ergosterod

Female sex Harmons

Globulin

The process in when alkene are converted into carboxylic acid is known as

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Oxidation

Reduction

Hydrolysis

Hydration

Which set of Hybrid orbital has planner triangular shape

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sp

sp²

dsp²

sp³

Usually the percentage of moisture is paper is

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1- 3%

4-6%

6-8%

5%

In which layer of atmosphere, ozone is present.

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Thermosphere

Mesosphere

Stratosphere

Troposphere

Wohler synthesized first organic compound in laboratory from

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Heating cyanogen's

Cyanogen and ammonium chloride solution

Cyanogen and HNO2

Heating ammonium cyanate

Which has reddish brown colour.

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silver acetylide

Copper acetylide

BaSO4

Aqueous KMnO4 solution

Dolomite is a carbonate of

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Be

Mg

Na

Ba

What product is formed by the dry distillation of calcium acetate.

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CH3CH2COOH

CH3COOH

CH3COCH3

CH3CH2CHO

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