49) In a bag there are 6 red balls, 2 blue balls and 7 white balls. What is the probability of getting either a white or red ball?

50) The type of space lattice found in alpha-iron is

51) In an electrolytic process, the component to be plated is

52) The temperature at which structure of steel completely changes to austenite is called

53) Young's Modulus of Elasticity is