Chemistry: Post your doubts here!

[Studydayandnight]

NEED HELPPPP

Correct answer is D.

 

[Studydayandnight]

How is the answer B?

:'(

 

[Studydayandnight]

Omg, I don't understand half the paper. -_-

HELPPP

Correct answer is B.

 

[princess Anu]

Helpppppppp

Correct answer is B.

See if you understand this

 

[princess Anu]

Q2

 

[Studydayandnight]

Q2

I do get it Thanks

 

[tiki-taka]

28. all correct
29. only 1 is correct
can someone explain the logic??

 

[The Sarcastic Retard]

if "X" represents any one of the elements of G2: http://www.chemguide.co.uk/inorganic/group2/heatniteqtn.gif
1 mol of Mg(NO3)2 ------> 2 mol of NO2
n = m/Mr
n(Mg(NO3)2) = 7.4/148.3
n(NO2) = 2 * n(Mg(NO3)2) = 0.099797... ; 0.10 (2sf)
m = Mr * n
m(NO2) = 46 * 0.10 = 4.6g

 

[The Sarcastic Retard]

View attachment 54088
28. all correct
29. only 1 is correct
can someone explain the logic??

check answer of 28... It should be D

 

[Metanoia]

Omg, I don't understand half the paper. -_-

HELPPP

Correct answer is B.

Look at the molecules, which one of them is optically active (have a chiral carbon)?

Look at the groups connected to the double bonds, which of them is showing the trans isomerism?

 

[Sarosh Jameel]

HELP !

 

[Metanoia]

HELP !

With such questions, the neatest approach would be to use the tables to keep track of the quantities of reactants and products.

 

[obaid-ur-rehman]

9701/11/O/N/12 Ques 4

 

[princess Anu]

9701/11/O/N/12 Ques 4

is it A

 

[Kool boy]

Any idea about chemistry paper 32

 

[Ibrahim Siraj Pasha]

pH =-log ( 0.06667)
=0.176[/QUOTE]

 

[The Sarcastic Retard]

is it A

According to me, its should be near 630 - 660. I got 630so A too. Wait for answer.

 

[Studydayandnight]

Helpppp please!!!!!

 

[princess Anu]

is it B

Helpppp please!!!!!

 

[Boss201]

when 20cm (cube) of a gaseous hydrocarbon were completely burnt in excess of oxygen, 60cm(cube) of carbon dioxide and 40cm(cube) of water vapour were formed, all volumes being measured at same temperature and pressure.

what is the formula of the hydrocarbon ?

A.C2H6
B.C3H4
C.C3H6
D.C3H8

ANS : B

how to work out this question ?

Thanks