List of practice Questions

The boiling points of hydrides of group 16 are in the order
The blades of a windmill sweep out a circle of area $A$. If the wind flows at a velocity $v$ perpendicular to the circle, then the mass of the air of density $\rho$ passing through it in time $t$ is
The bleaching properties of $H_2O_2$ are due to its
The basicity of phosphorus acid is
The best method to prepare neopentyl chloride is
The binding energy of an electron in the ground state of He-atom is $E_0= 24.7e \,V$The energy required to remove both the electrons from the atom is
The bag $'A'$ contains $5$ white and $3$ black balls while the bag $'B'$ contains $4$ white and $7$ black balls. One of the bags is chosen at random and a ball is drawn from it. What is the probability that the ball is white?
The basic character of amines is because
The basic component of the smog is
The average self-induced emf in a 25mH solenoid when the current in it falls from 0.2 A to 0 A in 0.01 second, is
The average molecular speed is greatest in which of the following gas samples ?
The average depth of Indian ocean is about $3000\, m$. The fractional compression, $\frac{\Delta V}{V}$ of water at the bottom of the ocean is (Given : Bulk modulus of the water $= 2.2 ? 10^9 \,N \,m^{-2}$ and $g = 10 \,m\, s^{-2}$)
The atomicity of various noble gases is
The available space filled in hexagonal close packing pattern in one layer is
The average composition of portland cement is
The ascending or descending arrangement of taxonomic categories is called as
The atomic number of an element $M$ is $26$. How many electrons are present in the M-shell of the element in its $M^{3+}$ state
The atomic radius increases as we move down a group because
The area under acceleration-time graph represents the
The area under the curve $y = | \cos \, x - \sin \, x |, 0 \le x \le \frac{\pi}{2},$ and above x-axis is :
The arithmetic mean of first n odd natural numbers is
The area of the ellipse $\frac{x^2}{9} + \frac{y^2}{4} = 1 $ is :
The area of the parallelogram formed by the lines $ax+by+c_1=0, \: ax+by+c_2=0, \: px+qy+r_1=0, \: px+qy+r_2=0$
The area of the region bounded by the curves y =| x - 2 |, x = 1, x = 3 and the x-axis is
The area bounded by the line $y - x$ , x-axis and lines $x = -1$ to $x = 2$, is