Question # 1

On which bases froth floatation process take place?

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Density bases

Concentration basis

Watting basis

None of these

Water become hard because of:

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Ca+2

Mg+2

SO-24

all of these

Monosaccharides are crystalline solids

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Grey

Crimson

Silver

White

The general formula of alkane is

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C_nH_2n+2

C_nH_2n-2

C_nH_2n

C_nH_2n+1

For reactions having large Kc value, the reaction proceeds to:

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Completion

Equilibrium state

back ward

None of these

Acid rain damages the building it is due to reaction on.

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Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxilat

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

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

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

All acids turn blue litmus.

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Red

Blue

Pinck

White

Which one is Lewis Acid?

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BF₃

AICI₃

FeCl₃

All of these

Basic solution have pH value.

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Less than 7

Greater than 7

equal to 7

None of these

Acids have taste

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Bitter

Seetish

Sour

Saltish

Incomplete combustion of alkanes produce.

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Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

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