A. 0.8
B. 7.8
C. 200
D. 10000
Related Mcqs:
- All the atoms of the world comprise of electrons, proton & neutron except that of ______________ atom in which neutron is absent ?
A. Deuterium
B. Hydrogen
C. Neon
D. Helium - Nuclear fission of one atom of uranium-235 produces the energy equivalent to about ____________ MeV?
A. 20
B. 200
C. 500
D. 2000 - The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?
A. 159
B. 1837
C. 2537
D. 10000 - Half life of a radioactive isotope corresponds to the time required for half of the _______________ to decay ?
A. Atoms
B. Neutrons
C. Nucleons
D. Electrons - Direct conversion of thermal energy to electrical energy is facilitated by the____________________?
A. Fuel cells
B. Photo voltaic cell
C. Magneto hydrodynamic generator
D. None of these - Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________?
A. Achieve very high purity of aluminium (99.9%)
B. Keep the electrolyte in liquid condition by the generation of heat
C. Electrolytically dissociate alumina
D. Both B. & C. - In ________________ process, there is an increase in entropy with no degradation of energy ?
A. Isothermal expansion
B. Isochoric heat addition
C. Polytropic expansion
D. Isobaric heat addition - A solar cell converts the sunlight directly into ______________ energy?
A. Thermal
B. Electrical
C. Mechanical
D. Chemical - Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________________ kJ ?
A. +4000
B. -4000
C. 10000
D. -10000 - The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?
A. 130
B. 180
C. 230
D. 250
