Biology; Chemistry; Physics: Post your doubts here!

[Saad Mughal]

What do they form? Does copper react with them?what about caesium? What do they form?

Caesium is the most reactive metal of all. It would probably explode while reacting with the water. Still though, Caesium Hydroxide would be formed.

 

[Saad Mughal]

What about Caesium?
View attachment 27157 Please answer this too.

HCl is covalent. Have you heard of hydrides? They are unique bonds of Hydrogen (with group 1 metals mostly) in which hydrogen forms negative ion. So the answer should be D, in which Sodium Hydride (NaH) would be formed.

 

[TheLeagueofShadows]

c

HCl is covalent. Have you heard of hydrides? They are unique bonds of Hydrogen (with group 1 metals) in which hydrogen forms negative ion. So the answer should be D, in which Sodium Hydride (NaH) would be formed.

dafaq is thiz shizz?

 

[Saad Mughal]

c
dafaq is thiz shizz?

Chemistry.

 

[TheLeagueofShadows]

what about this?

 

[TheLeagueofShadows]

And what about this?

 

[Saad Mughal]

what about this?

Answer is C. Number of Particles = No. of moles * Avogadro Number.

 

[starship]

what about this?

c

 

[TheLeagueofShadows]

Answer is C. Number of Particles = No. of moles * Avogadro Number.

why not no of atoms?

 

[starship]

And what about this?
View attachment 27159

D

 

[Saad Mughal]

And what about this?
View attachment 27159

Since it reacts with Na2CO3 to form CO2. The reaction is Acid + Metal Carbonate, so we know that it is a carboxylic acid.
Also, since it reacts with bromine to turn it colourless. The compound has a carbon-carbon double bond.
The answer hence should be D.

 

[Saad Mughal]

why not no of atoms?

Number of atoms are for one mole of an element only not molecules such as ethanol and ethane.

 

[TheLeagueofShadows]

Since it reacts with Na2CO3 to form CO2. The reaction is Acid + Metal Carbonate, so we know that it is a carboxylic acid.
Also, since it reacts with bromine to turn it colourless. The compound has a carbon-carbon double bond.
The answer hence should be D.

But if you count the no. of carbon and hyrogen atoms acc. to formula, it doesnt make sense.Why?

 

[Saad Mughal]

But if you count the no. of carbon and hyrogen atoms acc. to formula, it doesnt make sense.Why?

Look, one mole of ANY compound contains the same no. of molecules i.e. Avogadro Number of molecules.

 

[TheLeagueofShadows]

Look, one mole of ANY compound contains the same no. of molecules i.e. Avogadro Number of molecules.

O bhai jaan, the other question, not this one.

 

[TheLeagueofShadows]

the carboxylic wala.

 

[usama321]

Saad Mughal. Zinc reacts with water to make hydroxide, not oxide. It burns to form oxide

 

[Saad Mughal]

O bhai jaan, the other question, not this one.

k. Look, the important part is that the compound MUST contain a carboxyl functional group AND a carbon-carbon double bond. And this is only found in D.

 

[TheLeagueofShadows]

I was opting for carboxylic acid. But how are we supposed to choose our answer if the carboxylic acid formula is not right? I mean banda check karta ha?

 

[Saad Mughal]

Saad Mughal. Zinc reacts with water to make hydroxide, not oxide. It burns to form oxide

Zinc reacts with water over ages.
Zinc reacts with steam to form ZnO.
If you use powdered zinc and very hot water then the zinc reacts otherwise it is a process that takes ages.