Class 11th

Does bromine water test work for alkynes?

Consider the reactions

A and B are

Given below are two statements:
Statement I: Hyper conjugation is permanent effect.
Statement II: Hyper conjugation in ethyl cation (CH₃—CH₂⁺) involves the overlapping of Csp² – H₁ₛ bond with empty 2p orbital of other carbon.
Choose the correct option:

If the Thompson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:

Consider two spring balances hooked as shown in the figure. We pull them in opposite directions with equal force. If the reading shown by A is 5 N, reading shown by B will be ______ N.

A particle moves with a velocity v = (5i - 3j + 6k) ms^-1 under the influence of a constant force F = (i - j - k)N. The instantaneous power applied to the particle is ______ Watts.

A grass hopper can jump maximum distance 1.6 m. It spends negligible time on ground. How far can it go in 2√2s (in meters)?

If the molar specific heat at constant pressure for a polyatomic non-linear gas is x and the molar specific heat at constant volume for a diatomic gas is y, find the value of x y.

A flying disc of radius r is moving with constant speed v? while rotating anticlockwise with angular speed v?/r along a curve PQ as shown below. Radius of curvature of curve at the instant is 4r. The magnitude of acceleration of point A at the instant is (3v₀²)/(nr). Find n.

Shown in figure is a block at rest having an inclined smooth groove in vertical plane. The horizontal surface is smooth. A ball of same mass as that of block at rest is released from top end. The time when ball will leave groove is √(nL/(2g√3)). Find n.