List of practice Questions

If a machine is lubricated with oil
The thermo-emf of a thermocouple is $25 \mu V/^\circ C$ at room temperature. A galvanometer of $40 \Omega $ resistance, capable of detecting current as low as $10^{-1} A, $ is connected with the thermocoupie. The smallest temperature difference that can be detected by this system is
For circuit the equivalent capacitance between P and Q is
Which one of the following methods is neither meant for the synthesis nor for separation of amines ?
The electric field and the potential of an electric dipole vary with distance r as
The de-Broglie wavelength of neutrons in thermal equilibrium at temperature $T$ is
Shear stress is related to
Marsh gas mainly contains
For decolourisation of $1$ mole of acidified $KMnO_4$ the moles of $H_2O_2$ required are
Which one of the following is a wrong statement
What is antisense technology?
Lanthanoid contraction is caused due to
Given below are four logic gate symbols. Those for OR, NOR and NAND are respectively
The noble gas forming maximum number of compounds is
Which of the following is soluble in water?
Which of the following will decolourise alkaline $KMnO_4$ solution?
When a ray of light enters a glass slab from air
Two masses of 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their momenta is
$Given A = sin^2 \theta + cos^4 \theta , then for all real values of \theta$
Two events A and B have probabilities 0.25 and 0.50, respectively. The probability that both A and B occur simultaneously is 0.14. Then, the probability th a t neither A nor B occurs, is
The probability that an event A happens in one trial of an experiment, is 0.4. Three independent trials of the experiments are performed. The probability that the event A happens at least once, is
Two circles $ x^2 + y^2 = 6$ and $ x^2 + y^2 - 6x + 8 = 0$ are given. Then the equation of the circle passing through their points of intersection and the point (1, 1) is
Given positive integers $r >1, n > 2$ and the coefficient of $(3r)th$ and $ (r + 2)th $ terms in the binomial expansion of $(1 + x)^2n$ are equal. Then,
Both the roots of the equation $(x-b)(x-c)+(x-a)(x-c)+(x-a)(x-b)=0$ are always
A ship of mass $3\times 10^7$ kg initially at rest, is pulled by a force of $5\times 10^4 N$ through a distance of 3 m. Assuming that the resistance due to water is negligible, the speed of the ship is