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In which of the following pairs the two species are not isotructural ?

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Let R be the real line. Consider the following subsets of the plane $R×R$.$S={(x,y):y=x+1and0<x<2},T={(x,y):x−y$is an integer }. Which one of the following is true?

The equilibrium constant \displaystyle{K}_{{{P}_{}}}

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is

Suppose an electron is attracted towards the origin by a force k/r where 'k' is a constant and 'r' is the distance of the electron from the origin. By applying Bohr modeal to this system, the radius of the $n_{th}$ orbital of the electron is found to be $_{′}r_{n}$ and the kinetic energy of the electron to e $T_{n}$. Then which of the following is true ?

How many different words can be formed by jumbling the letters in the word MISSISSIPPI in which no two S are adjacent?

The alkene that exhibits geometrical isomerism is :

If $u,v,w$ are noncoplanar vectors and p, q are real numbers, then the equality $[3u,pv,pw]−[pv,w,qu]−[2w,qv,qu]=0$ holds for(A) exactly one value of (p, q)(B) exactly two values of (p, q)(C) more than two but not all values of (p, q)(D) all values of (p, q)

The organic chloro compound, which shows complete stereochemical inversion during a $S_{N}2$ reaction, is