List of practice Questions

A man speaks truth 2 out of 3 times. He picks one of the natural numbers in the set S = {1, 2, 3, 4, 5, 6, 7} and reports that it is even. The probability that it is actually even is

If cos x = |sin x| then, the general solution is

If $A = \{ x | x \in N, x \le 5 \}, B = \{ x | x \in Z, x^2 - 5x + 6 = 0\}$, then the number of onto functions from A to B is

$\sqrt{3}\, cosec \,20^{\circ} - \sec\, 20^{\circ}$ =

If $| 3x -5| \le 2$, then

For an ideal solution, the correct option is:

For a cell involving one electron \(E^\ominus cell=0.59V\) at 298 K, the equilibrium constant for the cell reaction is: [Given that \(\frac{ 2.303 RT }{F}\) \(=0.059 V\) at\( T 298 K \)] 

The major product of the following reaction is:

Among the following, the narrow spectrum antibiotic is:

The total energy of an electron in an atom in an orbit is 3.4 eV. Its kinetic and potential energies are, respectively:

A copper rod of \(88 cm \) and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is: (\(\alpha_{cu}-1.7\times 10^{-5}K^{-1} \)and \(\alpha_{Al}=2.2×10^{-5}K^{-1}\)) 

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

A block of mass \(10 kg\) is in contact against the inner wall of a hollow cylindrical drum of radius \( 1 m.\) The coefficient of friction between the block and the inner wall of the cylinder is \( 0.1\). The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be: (\(g=10 \frac{m}{s^2}\)

Cells in \(G_0\) phase:

What is the fate of the male gametes discharged in the synergid?

Pinus seed cannot germinate and establish without fungal association. This is because

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

Which of the following statements is incorrect?

Select the correct group of biocontrol agents.

Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

Select the correct sequence for transport of sperm cells in male reproductive system.

Which of the following pair of organelles does not contain DNA?

Concanavalin A is:(1) an alkaloid (2) an essential oil (3) a lectin (4) a pigment

Consider following features:
(a) Organ system level of organisation
(b) Bilateral symmetry 
(c) True coelomates with segmentation of body 
Select the correct option of animal groups which possess all the above characteristics.