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All posts related to Science

Kishlay
Shared from BITSAT Mock - 6 on Sep 15, 2020 9:51 AM

On adding 0.1 M solution of [Ag+], [Ba2+] and [Ca2+] (each) in a Na2SO4 solution, compound that will be precipitated first is
[Ksp BaSO4 = 10-11, Ksp CaSO4 = 10-6 and Ksp Ag2SO4 = 10-5]

 
Ag2SO4
BaSO4
CaSO4
None of the above
Please type your answer before submitting.
Kishlay

You must specify how the answer must be given

Jerry Purohit
Shared from IISER Mock - 1 on Sep 14, 2020 10:06 PM

The equivalent mass of a metal is 4. The vapour density of its chloride is 59.25. Its atomic mass is:

 
8
16
12
20
Please type your answer before submitting.
Nidhi Chanda

Did not understand

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Abhisumat Pattnaik
Shared from BITSAT Mock - 11 on Sep 13, 2020 1:22 PM

Three particles A, B and C carrying respectively one, two and three positive charges on them enter into a magnetic field which is perpendicular to their velocities. If the masses of the particles A, B and C are in the ratio 1 : 2 : 3, then choose the correct statement among the following:

 
A will deflect the most.
B will deflect the most.
C will deflect the most.
All will be delectated equally.
None of these
Please type your answer before submitting.
Abhisumat Pattnaik

It isn't mentioned that their Kinetic energies are equal ...

Harshit Singh
Shared from BITSAT - 2018 on Sep 12, 2020 5:58 PM

What is the freezing point of a 10% (w/w) solution of a non volatile solute in water?
[Kf of water = 1.86° K kg mol-1, Molar mass of the solute = 32 g mol-1]

 
90°C
10°C
6.47°C
-6.47°C
Please type your answer before submitting.
Harshit Singh

Idk if such options will be in exam but if yes then this question can be done in 10sec cause there is always depression in freezing point so temperature will be less than 0.

Ashish Srivari
Shared from BITSAT - 2018 on Aug 20, 2020 4:51 PM

When N2O5 is heated at certain temperature, it dissociates as:

N2O5(g) N2O3 g + O2(g); Kc = 2.5
At the same time, N2O3 also decomposes as:
N2O3(g) N2O g + O2 (g)

If initially 4.0 moles of N2O5 are taken in 1.0 litre flask and allowed to dissociate and concentration of O2 at equilibrium is 2.5 M. Equilibrium concentration of N2O5 is:

 
1.0 M
1.5 M
2.166 M
1.846 M
Please type your answer before submitting.
Ashish Srivari

How did you solve for x when there are 2 variables and only one equation?