Action of water or dilute mineral acids on metals can give

Ortho and para hydrogen differ in

Hydrogen resembles in many of its properties

Which of the following reaction produces hydrogen

Among the following, identify the compound which cannot act as both oxidising and reducing agents

On reaction with Mg, very dilute nitric acid produces

Which is distilled first

Which pair does not show hydrogen isotopes

Among and the correct order of acid strength is </span

The following graph illustrates

64 equal drops of water are falling through air with a steady velocity  , if the drops coalesce, what is their new velocity?

A steel ball of diameter 3.2 mm falls under gravity through an oil of density 920kg and viscosity  1.64Ns. The density of steel may be taken as7820kg What is the terminal velocity of the ball?

A steel ball of diameter 3 mm falls through glycerine and covers a distance of 25 cm in  10s. The specific gravity of steel and glycerine are 7.8 and  1.26 respectively. The viscosity of glycerine is about......... pa"

A boat of area  floating on the surface of a river is made to move horizontaly with a speed of  by applying a tangential force. If the river is  deep and the water in contact with the bed is stationary, what is the tangential force needed to keep the boat moving ? (viscosity of water 0.01 poise)

The slope of the tangent to the curve at is

To find the slope we differentiate the given curve w.r.t x.