Identify the correct statements from the following
I) Sulphur sol is an example for multi molecular colloid.
II) Starch sol is an example for associated colloid.
III) Artificial rubber is an example for macromolecular colloid.

The correct order of coagulating power of the following ions to coagulate the positive sol is
\(\underset{\mathrm{I}}{\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},} \underset{\mathrm{II}}{\mathrm{Cl}^{-}}, \underset{\mathrm{III}}{\mathrm{SO}_4^{2-}}\)

If uncertainity in the measurement of position and momentum of a microscopic object of mass $\text{'}\mathrm{m}\text{'}$ are equal, then the uncertainity in the measurement of velocity is given by the expression

In which of the following reactions, benzaldehyde is formed from benzoyl chloride and hydrogen in the presence of $\mathrm{Pd}-{\mathrm{BaSO}}_4$?

If the most probable speed of \(\mathrm{CO}_2\) at \(27^{\circ} \mathrm{C}\) is \(400 \mathrm{~ms}^{-1}\). The root mean square velocity of \(\mathrm{CO}_2\) at the same temperature in \(\mathrm{ms}^{-1}\) is approximately

Which of the following chemicals can be added for sweetening of food items at cooking temperature and does not provide calories?

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:

In Huygen's eyepiece

The rank of \(\left[\begin{array}{ccc}1 & -1 & 1 \\ 1 & 1 & -1 \\ -1 & 1 & 1\end{array}\right]\) is

If the line joining the points \((k, 2,3)\) and \((1,1,2)\) is parallel to the line joining the points \((5,4,-1)\) and \((3,2,-3)\), then the value of \(k\) is equal to

The pole of the line \(x+y+2=0\) with respect to the circle \(x^2+y^2-4 x+6 y-12=0\) is

A prism \((\mu=1.5)\) has the refracting angle of \(30^{\circ}\). The deviation of a monochromatic ray incident normally on its one surface will be (given, \(\sin 48^{\circ} 36^{\prime}=0.75\))

A Carnot engine having an efficiency 1/5 as a heat engine, is used as a refrigerator. If the work done on the system is 50 J, then the
amount of energy absorbed from the reservoir at lower temperature is