List of practice Questions

The main digestive function of enterokinase is

Activity of radioactive element decreased to one-third of original activity $R_{o}$ in $9\, yr$. After further $9\, yr$, its activity will be

The ??pin-only??magnetic moment [in units of Bohr magneton,$\left(\mu_{\beta}\right)$ ] of $Ni^{2+}$ in aqueous solution would be (Atomic number of Ni = 28):

What is the $pH$ value of $M H _{2} SO _{4}$ ?

Aqueous solution of $Na_2S_2O_3$ on reaction with $Cl_2$ gives

Angle of repose is equal to the angle of limiting friction. When the body is just at the point of motion, the force of friction in this stage is called limiting friction.

Blood group is due to

Three moles of $PCl_5$, three moles of $PCl_3$ and two moles of $Cl_2$ are taken in a closed vessel. If at equilibrium the vessel has $1.5$ moles of $PCl_5$, the number of moles of $PCl_3$ present in it is

If the colour code of carbon resistor is as follows, then give the value of its resistance in $k \, \Omega$, Colour of I strip-yellow Colour of II strip-blue Colour of III strip-orange Colour of IV strip-gold

Which one of the following pairs is not correctly matched ?

A solution of colourless salt $H$ on boiling with excess $NaOH$ produces a non-flammable gas. The gas evolution ceases after sometime. Upon addition of $Zn$ dust to the same solution, the gas evolution restarts. The colourless salt(s) $H$

The correct statement(s) concerning the structures $E, F$ and $G$ is/are

The RNA primer is used in

The Bulk Modulus for an incompressible liquid is

Figure shows three resistor configurations $R_{1}, R_{2}$ and $R_{2}$ connected to $3 V$ battery. If the power dissipated by the configuration $R_{1}, R_{2}$ and $R_{3}$ is $P_{1}, P_{2}$ and $P_{3}$, respectively, then

In a potentiometer, the null point is received at $7th$ wire. If now we have to change the null point at the $9th$ wire, what should we do?

In a potentiometer, the null point is received at $7th$ wire. If now we have to change the null point at the $9th$ wire, what should we do?

A galvanometer coil has a resistance of $15\, \Omega$ and gives full scale deflection for a current of $4\, mA$. To convert it to an ammeter of range $0$ to $6\, A$

When a concentrated solution is diluted by adding more water, molarity of the solution remains unchanged. Product of moles of a solute and volume is equal to the molarity.

The pH of a $0.001 \,M$ solution of $ HCl $ is

Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100 $\Omega$. The conductivity of this solution is $1.29 S m^{-1}.$. Resistance of the same cell when filled with 0.2 M of the same solution is 520 $\Omega$. The molar conductivity of 0.02 M solution of the electrolyte will be:

A body executes simple harmonic motion. The potential energy (PE), the kinetic energy (KE) and total energy (TE) are measured as function of displacement x. Which of the following statements is true?

A mass M is suspended from a spring of negligible mass. The spring is pulled a little and then released so that the mass executes SHM of time period T. If the mass is increased by m, the time period becomes $ \text{5T/3,} $ then the ratio of $ \frac{m}{M} $ is

In an SHM, kinetic and potential energies become equal when the displacement is 1/$\sqrt{2}$ times the amplitude. In SHM, kinetic energy is zero when potential energy is maximum.