Question # 1

If a salt bridge is removed between the two half cells the voltage

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Drops to zero

Does not change

Increases gradually

Increases rapidly

The essential component of organic compound is

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O

C

P

N

Which of the following fluorides does not exist?

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NF₅

PF₅

AsF₅

SbF₅

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

How many moles of Helium gas occupy 22.4 L at 0^oC at 1 atm.Pressure?

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0.11

0.90

1.0

1.11

Isopropyl alcohol on oxidation forms

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Acetone

Ether

Ethylene

Acetaldehyde

Cannizzaro reaction is not given by

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Trimethyl acetaldehyde

Acetaldehyde

Benzaldehyde

Formaldehyde

In N.W.F.P the phosphate fertilizer are produced at

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D.I.Khan

Haripur

Nowshera

Dargai

The rotation of two carbon atoms joined by double bond would happened only if

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Pi bond is broken

Sigma bond is broken

Both bonds are broken

None of above

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

The symbol of the element whose atoms have the outer most electronic configuration 2s² 2p³ is

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N

Li

P

Na

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