List of practice Questions

In 1984, Bhopal gas tragedy was caused due to leakage of

When a thin metal plate is placed in the path of one of the interfering beams of light

The number of ?

Oxidation number of ???

A positive carbylamine test is given by

Which of the following is used as a moderator in nuclear reaction?

In Young?s experiment, the monochromatic light is used to illuminate two slits $A$ and $B$ as shown. Interference fringes are observed on a screen placed in front of the slits. Now if a thin glass plate is placed normally in the path of beam coming from the slit $A$, then

Diode is used as a/an

Energy is not carried by which of the following wave?

Boolean algebra is essentially based on

A particle of mass $ m $ moving with velocity $ v $ collides with a stationary particle of mass $ 2m $ . The speed of the system, will be:

The reaction responsible for the production of light energy from the sun is

In n-type semiconductors, majority charge carriers are

Kidney of adult reptiles are

An animal, which is diploblastic and radially symmertrical is:

In sponges, circulation of waler in flagellated chamber is facilitated by:

Two identical circular loops of metal wire are lying on a table without touching each other. Loop A carries a current which increases with time. In response, the loop B

The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K. is

The oxidation number of sulphur in $S_8 , S_2F_2, H_2S$ respectively, are

The normality of 0.3 M phosphorus acid $(H_3PO_3)$ is

The coordination number of metal crystallising in a hexagonal close packing is

Let $PQR$ be a right angled isosceles triangle, right angled at $P (2,1)$. If the equation of the line $QR$ is $2x + y = 3$, then the equation representing the pair of lines PQ and PR is