List of practice Questions

The relation between time $t$ and distance $x$ is $t = ax^2 + bx$, where $a$ and $b$ are constants. The acceleration is:

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter ?

There are two opposing views about origin of Modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variations of DNA however suggested African origin of Modem man. What kind of observation on DNA variation could suggest this?

Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used :

Which of the following is the relatively most accurate method for dating of fossils ?

At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium ?

A child with mother of blood group A and father of blood group AB, will not have which of the following blood group?

Equimolar solutions in the same solvent have :

In contrast to annelids the Platyhelminthes show

In the reaction $ A(s)+B(g)+$ heat $ \rightleftharpoons 2C(s)+2D(g) $ at equilibrium, pressure of $B$ is doubled to re-establish the equilibrium. The factor by which concentration of $D$ is changed, is:

Which of the following is an inert gas ?

A cylindrical bar magnet is kept along the axis of a-circular coil. If the magnet is rotated about its axis, passing through the centre, perpendicular to the face, then:

Core of a transformer is made up of:

Sucrose molecule is made up of

Out of the following four dimensional quantities, which one qualifies to be called a dimensional constant ?

The pyramid of energy is always upright for any ecosystem. The situation indicates the fact that............

The site of EMP pathway of breakdown of glucose in a cell, is

$15 $ moles of $H_2$ and $5.2$ moles of $I_2$ are mixed and allowed to attain equilibrium at $500^\circ$C. At equilibrium, the concentration of $HI$ is found to be $10$ moles. The equilibrium constant for the formation of $HI$ is

The induction coil works on the principle of

Which mirror is to be used to obtain a parallel beam of light from a small lamp?

When a body falls in air, the resistance of air depends to a great extent on the shape of the body. $3$ different shapes are given. Identify the combination of air resistances which truly represents the physical situation. (The cross sectional areas are the same)

1. Disc 2. Ball 3. cigar sheped

The wavelength of the radiation emitted by a body depends upon

The number of $P - O - P$ bridges in the structure of phosphorus pentoxide and phosphorus trioxide are respectively

Consider a short magnetic dipole of magnetic length 10 cm. Its geometric length is

Angular velocity of hour hand of a watch is