List of practice Questions

The C- H bond distance is the longest in
Malaria fever coincides with liberation of
Calgon used as a water softner, is
Which of the following is the true structure of HO?
Which one of the following atoms will have the smallest size?
When n type semiconductor is heated
Floral formula of tomato/tobacco is
Acid rains are produced by
Which one of the following is the smallest in size?
Two identical p-n junctions may be connected in series with a battery in three ways . The potential drops across the two p-n junctions are equal in
The molecule which has pyramidal shape is
Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between the planet and the star is proportional to $ R^{-5/2} $ , then
For an ideal gas
The lines $2x - 3y = 5$ and $3x - 4y = 7$ are diameters of a circle of area 154 sq unitis. Then, the equation of this circle is
I f F and F are independent events such that $O < P(E) < 1$ and $O < P (F ) < 1$, then
A five digit number divisible by $3$ is to be formed by using the numerals $0$, $1$, $2$, $3$, $4$ and $5$ without repetition. The total number of ways in which can be done is
Energy in a current carrying coil is stored in the form of
A solid cylinder of mass $M$ and radius $R$ rolls without slipping down an inclined plane of length $L$ and height $h$. What is the speed of its centre of mass when the cylinder reaches its bottom -
The impurity atoms with which pure silicon should be doped to make a p-type semiconductor are those of
A car is moving along a straight road with a uniform acceleration. It passes through two points P and Q separated by a distance with velocity 30 km/ h and 40 km/h respectively. The velocity of the car midway between P and Q is
The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation
Eddy currents are produced when
What is true of ecosystem?
Static concept of species was put forward by
Cork is formed from