List of practice Questions

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
I f F and F are independent events such that $O < P(E) < 1$ and $O < P (F ) < 1$, then
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
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
Static concept of species was put forward by
What is true of ecosystem?
Cork is formed from
The most stable hydride is
Formation of gametophyte directly from sporophyte without meiosis is
According to fluid mosaic model, plasma membrane is composed of