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Which of the following molecules is least resonance stabilized?

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The period of oscillation of a simple pendulum is $T=2πgL .$ Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution. The accuracy in the determination of g is :

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 :

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:

A hoop of radius r and mass m rotating with an angular velocity $ω_{0}$ is placed on a rough horizontal surface. The initial velocity of the centre of the hoop is zero. What will be the velocity of the centre of the hoop when it ceases to slip?

If m is the A.M. of two distinct real numbers $l$and $n(l,n>1)$and$G_{1},G_{2}$ and $G_{3}$ are three geometric means between $l$and n, then $G_{1}+2G_{2}+G_{3}$equals,

If $∫f(x)dx=ψ(x)$, then $∫x_{5}f(x_{3})dx$is equal to

Consider the following reaction: $xMnO_{4}+yC_{2}O_{4}+zH_{+}3/4 xMn_{2+}+2yCO_{2}+2z H_{2}O$ The values of x, y and z in the reaction are, respectively:

If $α,β=0$, and $f(n)=α_{n}+β_{n}$and \displaystyle{\mid}{3}{1}+{f}