Q:1

Aluminum is the third most abundant elements in earth crust after?

Oxygen

Silicon

None of the above

Both of the Both

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Q:2

An ordinary misoscope is used to measure the objec

upto 500 nm &nb

upto 850 nm

upto 1000 nm &nb

upto 1200 nm

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Q:3

Alkenes mostly follow reaction of?

addition reaction

elimination reaction

substitution reaction

all of them

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Q:4

White fumes

Mono atomic molecule

Effusion

Law of diffusion

NH3 & HCl

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Q:5

Which substituent group decrease the reactivity of benzene, because they ?

Increase the electronic density of benzene ring

Decrease the electronic density of benzene ring

Decrease the stability of phenonium ion

Both b & c

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Aluminum is the third most abundant elements in earth crust after?

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An ordinary misoscope is used to measure the objec

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Alkenes mostly follow reaction of?

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Q:4

White fumes

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Q:5

Which substituent group decrease the reactivity of benzene, because they ?

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