In which of the following reactions, hydrogen peroxide acts as an oxidizing agent ?
All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the students. Which of the following statistical measures will not change even after the grace marks were given ?
For gaseous state, if most probable speed is denoated by C∗, average speed by C and mean square speed by C, then for a large number of molecules the ratios of these speeds are:
Diameter of plano-convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is 2×108m/s, the focal length of the lens is :
The distance of the point (1, 0, 2) from the point of intersection of the line 3x−2=4y+1=12z−2and the plane x y + z = 16, is :
On a hot summer night, the refractive index of air is smallest near the ground and increases with height from the ground. When a light beam is directed horizontally, the Huygens' principle leads us to conclude that as it travels, the light beam :
The period of oscillation of a simple pendulum is T=2πgL. Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution. The accuracy in the determination of g is :