1. specific heat of a metal is 0.0332 cal/gm.the atomic weight of metal is---

a)332    b)166

c)193     d)386

2.equivalent mass of a metal is 1.5 times that of oxygen, mass of its oxide is------------- times that of a metal

a)1.5      b) 2

c)1.67     d)1.33

3.200 gm of calcium is burned in limited supply of oxygen and further oxide is dissolved to make 1litre solution, if the efficiency of combustion is 50% then normality of the solution is??

a)1N             b) 1/10N

c)5N              d)1/20N

4.work done equal to 1litre atm  is

a)8.314J         b)101.3J

c).0821 J         d)760J

if the inversion temp of a gas is -80 degree celcius thn it will produce cooling under joule thomson efect at

1)298K            b)273K

c)193K             d)173K

1. by Dulong and petits law

atomic weight * specific heat=6.4

atomic weight*(0.0332)=6.4

atomic weight= 193

5 th answer

inversion temperature= - 80 degree celsius = 193 K

below this temperature the gas shows joule cooling effect....

so the right option must be d) 173 K

4th answer

1 litre atm = 1 x 10^-3 m³ x  101325 Pa

                    =  101.3  Pa m³

                     =  101.3 J