HELP WITH PHYSICS, CHEMISTRY AND MATHS A LITTLE BIT, ENTRY TEST (PIEAS)

[Jango]

Answer to 3 is b.

No idea about the other two!:p

Which other unis are you giving test for?

 

[nForce]

it does gives addition reaction like with halogens like bromine

and i think the answer to the first question is d
sodium acetate

Reaction of halogens with benzene is essentially a substitution.You get the hydrogen chloride/bromide etc from the reaction.

See, the thing is, all kinds of reaction are possible.But the most likely answer is addition because of very high activation energy barrier.

 

[rmi5]

wait, i thought id didnt undergo addition reactions? can you explain? and what about the other 2? DO YOU WANT ME TO FAIL? WHAT DID I EVER DO TOY YOU?

@Zarvan , @xenon54 @rmi5 do any of you know math?

Q2 would be both 403, and 397 Hz.
But, I don't know chemistry. @xenon54 , can you help him for his chemistry questions?

 

[Dr. Strangelove]

Reaction of halogens with benzene is essentially a substitution.You get the hydrogen chloride/bromide etc from the reaction.

See, the thing is, all kinds of reaction are possible.But the most likely answer is addition because of very high activation energy barrier.

i know it look at the question of op

 

[Hashshāshīn]

Physics question: Either 397 or 403 (unless if direction is specified)

Hate chemistry, so I don't know anything about it. But physics is the only real science anyway

 

[Dr. Strangelove]

this is a damn defence forum no chem phys specially my natural enemy mathematics

 

[Hashshāshīn]

this is a damn defence forum no chem phys specially my natural enemy mathematics

There would be no 'defence' without these three subjects.

 

[Jf Thunder]

Hahaha little baby, go away shooo shooo.

Keep your chemistry away from me.

dude, my UNI depends on it

 

[Dr. Strangelove]

There would be no 'defence' without these three subjects.

this is common sense you nincompoop
i dont like any subject for that matter

 

[Hashshāshīn]

this is common sense you nincompoop

What is common sense? What OP is asking? It's been common knowledge for 1000s of years, right?

 

[Jf Thunder]

Hate chemistry, so I don't know anything about it. But physics is the only real science anyway

which of the following EM raidiation shows the highest energy per quantum
a) RW b)MW c)Visible light d)X rays

 

[Dr. Strangelove]

What is common sense? What OP is asking? It's been common knowledge for 1000s of years, right?

my comment was sarcastic

which of the following EM raidiation shows the highest energy per quantum
a) RW b)MW c)Visible light d)X rays

x rays or mw

 

[Hashshāshīn]

which of the following EM raidiation shows the highest energy per quantum
a) RW b)MW c)Visible light d)X rays

X-rays.

In order of highest to lowest energy: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, microwave and radio wave.

Energy of a wave depends on its frequency. Therefore;

Higher frequency = Higher energy
Shorter Wavelength = Lower energy (As Wavelength and Frequency are inversely proportional).

Energy of Photon: E=hf

 

[kbd-raaf]

No offense bud, but if you're asking basic questions the night before your exam, it's not looking good.

which of the following EM raidiation shows the highest energy per quantum
a) RW b)MW c)Visible light d)X rays

The energy per quantum is found by multiplying the frequency by Planck's constant.

Which one has the highest frequency (lowest wavelength)? And you have your answer. Hint it's not visible light.

 

[xenon54 out]

Q2 would be both 403, and 397 Hz.
But, I don't know chemistry. @xenon54 , can you help him for his chemistry questions?

I can try.