List of practice Questions

The picture below shows three different types of plants (marked as P-I, P-II and P-III) which flower on the basis of their critical photoperiod. Now identify these plants (P-I, II and III).
The physical quantity that has no dimensions is:
The phenomenon in which adsorption and absorption takes place simultaneously is called
The photoelectric current can be increased by
The photoelectric cut off voltage in a certain experiment is $1.5\, V$. The maximum kinetic energy of photoelectrons emitted is
The physical quantity having the same dimensional formula as that of entropy is :
The phase difference between velocity and acceleration of simple harmonic oscillator.
The phase of shortest duration in mitosis is
The pH range for phenolphthalein is
The pH value of 0.001 M aqueous solution of NaCl is
The pH of human urine is approximately
The pH of neutral water is 6.5,then the temperature of water is
The $pH$ of succus entericus is
The pH of tears coming out of a person's eye is approximately
The pH of a 0.1 M aqueous solution of $NH_4OH$ is : $(K_b = 1.0 \times 10^{-5})$
The pH of a solution prepared by mixing 2.0 mL of HCl solution of pH 3.0 and 3.0 mL of NaOH of pH 10.0 is
The pH of $D_2O$ and $H_2O$ at 298 K is
The period of the function $\sin\left(\frac{2x}{3}\right)+\sin\left(\frac{3x}{2}\right) $ is
The perpendicular bisector of the line segment joining P (1, 4) and Q(k, 3) has y-intercept -4. Then a possible value of k is
The perimeter of the triangle with vertices at $ (1, 0, 0), (0, 1, 0) $ and $ (0 , 0 , 1)$ is :
The period of revolution of an earth's satellite close to surface of earth is 90 min. The time period of another satellite in an orbit at a distance of four times the radius of earth from its surface will be
The period of $\sin^2 \theta$ is
The percentage of element M is 53 in its oxide of molecular formula $M_2O_3$. Its atomic mass is about
The percentage of radioactive substance left after 5 half lives is
The peak voltage of 220 Volt AC mains (in Vol.) Is .