Which is not a water softner

a)Calgon

b)Permutit

c)Na₂CO₃

d)Na₂S

The hardness of water is due to ----------- metal ion

a)Ca²⁺ & Na²⁺

b)Mg²⁺ & K⁺

c)Ca²⁺ &Mg²⁺

d)Zn²⁺ & Ba²⁺

True peroxide is:

a)BaO₂

b)MnO₂

c)PbO₂

d)NO₂

a substance is taken through the process abc as shown in the fig. if the internal energy of the substance incs by 5000J and a heat of 2625 cal is gien to the system then calculate the value of J

theres a diagram  HC2 Pg 63 problem no. 12

please reply fast

Does a solid also have two kinds of molar heat capacities Cp and Cv? if yes do we have Cp>Cv and Cp -  Cv=R

explain

The [pressure of a gas changes linearly with volume from 10kPa 200cc to 50kPa 50cc.

a)Calcul;ate the work done by the gas

b) If no heat is supplied or extracted from the gas what is the change in internal energy of the gas

explan

Prob from HC Verma 2

gProblem 18 pg 63

fig shows variation of internal energy with volume V of 2 mole of an ideal gas in a cyclic process abcdaThe temperatures of the gas at b and c are 500K and 300K respectively Calculate heat absorbed by the gas during the process

there's a diaram please refer the book and reply soon

The equation sin^-1(3x/5)+sin^-1(4x/5)=sin^-1x, has

a)3 roots

b)the roots whose sum is zero

c)roots which form an A.P.

d)no roots

 

If g(x) is a polynomial satisfying g(x) g(y) = g(x) + g(y) + g(xy)-2 for all real x & y and g(2)=5 then g(3) is equal to

a)10

b)24

c)21

d)12

30g of Mg and 30g of O2 are reacted and th residual mixture contains

a)60g of MgO only

b)40g of MgO and 20g of O2

c)45g of MgO and 15g of O2

d)50g of MgO and 10g of O2

2.56g of sulphur in 100g of CS₂ has depression in freezing point of 0.01⁰C

K_f = 0.1 K molality^-1 Hence atomicity of sulphur in CS₂ is

a)2

b)6

c)4

d)8