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Bakelite is obtained from phenol by reacting with

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$∫cosx+3 sinxdx $ equals:

Which one of the following pairs of species have the same bond order ?

Let A be a $2×2$ matrix with real entries. Let I be the $2×2$identity matrix. Denote by tr (A), the sum of diagonal entries of A. Assume that $A_{2}=I$.Statement 1: If $A=I$and $A=−I$, then det $A=−1$.Statement 2: If $A=I$and $A=−I$, then $tr(A)=0$.

Which of the following pairs represents linkage isomers ?

If x, v and a denote the displacement, the velocity and the acceleration of a particle executing simple harmonic motion of time period T, then. Which of the following does not change with time ?

If the mean deviation of the numbers $1,1+d,1+2d,…,1+100d$ from their mean is 255, thenthe d is equal to

The alkene that exhibits geometrical isomerism is :

The differential equation of the family of circles with fixed radius 5 units and centre on the line $y=2$is