Number average molecular mass of a polymer that contains 15 molecules with each of mass, 8,000 and 15 molecules with each of mass 80,000 is

Temporary hardness of water is removed in Clark's process by adding

Observe the following statements :
a. The thermal stability of hydrides of group 16 elements follow the order :
\(\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}\)
b. Acidic nature of hydrides of group 16 elements follow the order :
\(\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}\)
c. The reducing nature of \(\mathrm{H}_2 \mathrm{~S}, \mathrm{H}_2 \mathrm{Se}\) and \(\mathrm{H}_2\) Te follow the order :
\(\mathrm{H}_2 \mathrm{~S} < \mathrm{H}_2 \mathrm{Se} < \mathrm{H}_2 \mathrm{Te}\)
The correct statement are:

Noble metals, like gold and platinum are soluble in which of the following mixtures?

Which of the following is not correct?

The drug, which was designed to prevent the interaction of histamine with the receptors present in the stomach wall is

During the electrolysis of cryolite, aluminium and fluorine are formed in ........ molar ratio :

If the pair of straight line given by \(A x^2+2 H x y+B y^2=0\), where \(\left(H^2>A B\right)\), forms an equilateral triangle with the line \(a x+b y+c=0\), then \((A+3 B)(3 A+B)=\)

A ball moving with velocity \(2 \mathrm{~m} / \mathrm{s}\) collides head on with another stationary ball of double the mass. If coefficient of restitution is 0.5 , then their velocities (in \(\mathrm{m} / \mathrm{s}\) ) after collision will be :

\(\int \sin ^4 x \cos ^4 x d x=\)

The number of ways in which 3 men and 3 women can be arranged in a row of 6 seats, such that the first and last seats must be filled by men is

The escape velocity of an object from a planet is \(16 \mathrm{kms}^{-1}\). If the escape velocity of the object from another planet having twice the density and three times the radius of the planet is \(v \sqrt{2} \mathrm{~ms}^{-1}\), then the value of \(v\) is

Given 5 different green toys, 4 different blue toys and 3 different red toys, how many combinations of toys can be chosen taking at least one green and one blue toy?