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Questions

Physics

Multiple Choice Question with Only One Choice Correct
A null vector has
(a) zero magnitude and a specific direction
(b) a finite magnitude and no specific direction
(c) a finite magnitude and a specific direction
(d) zero magnitude and no specific direction

Chemistry

Multiple Choice Question
An orbital with l = 0 is symmetrical about the

(a)

x-axis only

(b)

y-axis only

(c)

z-axis only

(d)

nucleus

Mathematics

True or False :
If a < b < c < d, then the roots of the equation (x - a) (x - c) + 2(x - b) (x - d) = 0 are real and distinct.

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