Question # 1

A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

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Aceton3

Dimethyi ether

Acetic acid

Acetaldehyde

Ethyl alcohol reacts with PCL and produces:

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Haloalkane

Alkyl halide & H3PO3,

Alkyl halide & POCl3

Alkyl halides &H3PO4.

The elements like N,P,K added into the large amount in soil are called:

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Basic elements

Additives

Macronutrients

Micronutrients

Glycogen on hydrolysis give

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Glucose

Lactose

Fructose

None

In which of these processes are small organic molecules changed into macromolecules?

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the fractional distillation of crude oil

the cracking of petroleum fractions

the hydrolysis of proteins

the polymerization

A single chlorine free radical can destroy how many ozone molecules

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100

100000

10000

10

The number of unpaired electrons present in Fe ions is

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1

2

5

0

Primary pollutant is that:

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Waste product of an industry

Which causes cancer

Whose concentration cannot be controlled

Which corrode the metal only

Naphthalene has two fused aromatic ring of carbon atom the molecular formula

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C10H8

C10H14

C10H10

C12H12

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destory

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50,000

10,000

20,000

None of these

Amount of product formed increases with time, this statement is true for reactions-------with kinetics

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1s order

3rd order

zero order

Any order

A set of compounds in which reactivity of halogen atom in the ascending order is

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Chlorobenzene, vinyl chloride, chloroethane

Chloroethane, chlorobenzene, vinyl chloride

Vinyl chloride,chlorobenzene chloroethane

Vinyl chloride, chloroethane,chlorobenzene

Which of the following reagents is used to distinguish between methanoic acid and ethanoic acid?

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Amm. silver nitrate solution

Neutral ferric chloride

Sodium hydroxide solution

Sodium carbonate solution

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

The final product formed by distilling ethyl alcohol with excess of Cl₂and Ca(OH)₂is

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CH₃CHO

CCl₃CHO

CHCl₃

(CH₃)₂O

Which is symmetric alkene?

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CH=C-CH₂

CH≡CH

CH₃-C≡C - CH₃

B and C

Ammonium nitrate fertilizer is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

Benzene does not undergo

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

Benzene hexachloride is used as

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Dye

Antimaterial drug

Antibiotic

Insecticide

When a metal is dipped in 1 molar of its solution at 298 K. then potential set up is called

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Standard electrode potential

Electric charge

Ionization potential

Electroplating

Zn + HCI are used in

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Clemenson reduction

Wof kishner reduction

Kolb's electrolysis

Wutruz reaction

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

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