The elements Li, B, C, Be and N have the electronegativities 1.0, 2.0, 1.5 and 3.0, respectively on the Pauling scale.

The electronegativity values of C,H,O,N and S are 2.5, 2.1, 3.5, 3.0 and 2.5 respectively. Which of the following is the most polar?

Two events A and B have probabilities 0.25 and 0.5 respectively. The probabilities that A and B occur simultaneously is 0.15. Then the probability that A or B occurs is

Reduction potentials of A, B, C and D are 0.8 V, 0.79 V ,0.34 V and -2.37 V respectively. Which element displaces all the other three elements ?

The quantum number for the last electrone n = 2 , l=0 , m=0 , s=1/2 represents the element.

Consider two hot bodies B_(1) and B_(2) which have temperature 100^(@)"C" and 80^(@)"C" respectively at t = 0. The temperature of surroundings is 40^(@)" C" . The ratio of the respective rates of cooling R_(1) and R_(2) of these two bodies at t = 0 will be

The element of second row and third column in the inverse of [[1, 2, 1], [2, 1, 0], [-1, 0, 1]] is

If the lines a x+2y+1=0,b x+3y+1=0a n dc x+4y+1=0 are concurrent, then a ,b ,c are in

If the co-ordinates of A and B are (1,1)and (5,7), then the equation of the perpendicular bisector of the line segment AB is............... A) 2x+3y=18 B) 2x-3y+18=0 C) 2x+3y-1=0 D) 3x-2y+1=0