Question # 1

The order or reactivity of hydrogen halides with alkenes is.

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HI/Br

HBr > HI

HCl > HBr

HBr>HCl

Which one of these protects us against the disease;

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Carbohydrates

Lipids

Proteins

all of these

Main component of natural gas is

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Methane

propane

Butane

Propene

Glucose and fructose are;

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trioses

tetroses

pentoses

hexoses

General formula of alkenes.

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C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

The order of reactivity of hydrogen halides with alkenes is.

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HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

Which is disaccharide?

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Glucose

Fructose

Sucrose

Starch

Dilute acids react with carbonates to produce the given products except.

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Salt

Water

Hydrogen

Carbon dioxide

When crude oil is heated in the fractionating tower:

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Vapour of higher boiling point fraction condense first in the lower part of the tower.

Vapours of lower boiling point fraction condense first in the lower part of tower.

Vapour of higher boiling point condense lather in the upper part of tower.

Vapours of higher boiling point never condense.

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

Alkenes are produced in large amounts by cracking of.

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Natural gas

Petroleum

Benzene

xylol

Infrared radiation emitted by the earth are absorbed by?

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CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

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