The gold numbers of three lyophobic colloids A, B and C are 0.005, 0.05 and 0.5 respectively. Which one of these will behave as the most effective protective colloid? Why?

Atomic number of three elements A. B and C are 10, 13 and 17 respectively:- which one of them will term cation and which one an'anion?

Which one of the following is most effective in coagulating Sb_(2)S_(3) sol?0

The velocities of two particles A and B are 0.05 and 0.02 m*s^(-1) respectively. The mass of B is five times the mass of A. the ratio of their de Broglie wavelength is-

A machine operates only when all of its three components function. The probabilities of the failures of the first, second and third components are 0.14, 0.10 and 0.05 respectively. What is the probability that the machine will fail.

The standard reduction potential of four elements A, B, C & D are - 0.40 V, +0.80 V, - 3.05 V & + 1.66 V respectively. Which of them is chemically most reactive ?

The coordinates of the vertices A, B and C of a triangle ABC are (0,5), (-1,-2) and (11,7) respectively . Find the coordinates of the foot of the perpendicular from B on AC.

If a and b be two real numbers and b > 0. then which one of the followings is false ?

Whenever horses a,b,c race together, their respective probabilities of winning the race are 0.3,0.5, and 0.2, respectively. If they race three times, the probability that the same horse wins all the three races, and the probability that a,b,c each wins one race are, respectively

A thermometer has its lower fixed point and upper fixed point marked as 0.5 and 101 respectively. What is the reading on this thermometer at 30^@ C.