List of practice Questions

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 .
The peak voltage of input a.c. to a full wave rectifier is $E_0$ The peak inverse voltage is
The peptide linkage formed between glycine $(NH_{2}CH_{2}COOH)$ and alanine
to give glycylalanine can be shown as
The percentage by weight of hydrogen in $H_2O_2$ is
The partial pressure of hydrogen in a flaskcontaining 2 g of $H_2$ and 32 g of $S0_2$ is
The particle size ranges from_________in colloidal state
The pathway of water from soil upto the secondary xylem is
The parabola $y^{2} = 2x$ divides the circle $x^{2 }+ y^{2} = 8$ in two parts. Then, the ratio of the areas of these parts is
The parametric form of equation of the circle $x^2 + y^2 - 6x + 2y - 28 = 0$ is
The part of internal ear responsible for hearing is
The oxide of nitrogen that is neutral in character is
The oxide which on dissolving in water turns blue litmus red is
The pair producing virtual as well as real image is
The pale blue syrupy liquid, $H_{2}O_{2}$ discovered by J. Thenard, is estimated by using
The oxidation state of oxygen in $O_2F_2$ is
The oxidation state of phosphorus vary from