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The species in which the N atom is in a state of sp hybridization is :

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A solution of (-) –1 - chloro - 1 - phenylethane is toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of :

If the function, $g(x)={kx+1 ,0≤x≤3mx+2,3$

The integral $∫_{2}gx_{2}+g(36−12x+x_{2})dxgx_{2} $ is equal to:

Assuming human pupil to have a radius of 0.25 cm and a comfortable viewing distance of 25 cm, the minimum separation between two objects that human eye can resolve at 500 nm wavelength is :

Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar?

The negation of $s∨(r∧s)$ is equivalent to :

Let C be the circle with centre at (1, 1) and radius = 1. If T is the circle centred at (0, y), passing through origin and touching the circle C externally, then the radius of T is equal to

The anode voltage of a photocell is kept fixed. The wavelength $λ$ of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows: