Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

In C.G.S. system the magnitude of the force is 100 dyne. In another system where fundamental physical quantities are kilogram, and minute, the magnitude of the force is

Which is the correct unit for measuring nuclear radii

Student I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum. They use different lengths of the pendulum and/or record time for different number of oscillations. The observations are shown in the table
Least count for length = 0.1 cm.
Least count for time = 0.1 s.

If E_I,E_II and E_III are the percentage errors in g, for students I, II and III respectively.

newton-second is the unit of

In Williamson’s synthesis

The angle between the lines x and x cos where is

Hence θ=α−β

The wheel rim has a diameter of 15 Metres. Which of the following is closest to the inside circumference of the Tyre designed to fit on the rim. ?

The circle graph represents a total of 240 animals. The shaded area represents the number of monkeys. How many of the animals many of the animals are monkeys?

An aldehyde on treatment with yields:

In the figure if TP and TQ are the two tangents to a circle with centre O so that ÐPOQ = 110º, then ÐPTQ is equal to

Hence ∠PTQ = 70°

the straight lines x and passes through the point

Ether fire can be extinguished by:

In the figure, , AC = BC, OA = 12 cm and OC = 6.5 cm. Find the area of DA.OB.

In the figure, compute the area of quadrilateral ABCD.

Glycerol is oxidised by bismuth nitrate to produce