A polymer is termed as an ‘elastomer’, if its percentage elongation is more than 100%. An elastomer is termed as ‘rubber’ if its percentage elongation is more than _______________ percent ?
The units of the rate constant for a second order reaction are__________________?
Between 230 and 370°C, blue brittleness is caused in mild steel because of the_________________?
Principal alloying element in Elinvar (used for making hair springs for watches) is__________________?
Neutrons are present in all atoms except that of ___________________?
An atom bomb works on the principle of __________________?
A psychrometer does not measure the __________________ temperature of moist air?
With increase in ___________________ Knocking tendency in a spark ignition petrol engine decreases?
Case hardening is not done by________________?
Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?
