List of practice Questions

The three fundamental characters of all chordates are
The three important oxidation states of phosphorus are
The time period of a simple pendulum on the surface of the earth is $4 \,s$. Its time period on the surface of the moon is
The third line of the Balmer series in the emission spectrum of the hydrogen atom is due to the transition from the
The three concurrent edges of a parallelepiped represents the vectors $\overrightarrow{a},\overrightarrow{b},\overrightarrow{c}$ such that $[\overrightarrow{a}\,\overrightarrow{b}\,\overrightarrow{c}]= \lambda$. Then the volume of the parallelopiped whose three concurrent edges are the three concurrent diagonals of three faces of the given parallelopiped is
The term 'terror of Bengal' is used for
The term "the evil quartet" is related with four major causes of
The terms taxonomy and systematics were coined by
The tetrahedral voids formed by ccp arrangement of $Cl^{-}$ ions in rock salt structure are
The term "competent" refers to
The term independent of $x$ in the expansion of $(x- \frac {3} {x^2})^{18}$
The term inertia was first used by
The term ??iodiversity?
The temperature of the gas consisting of rigid diatomic molecules is T = 300K. Calculate the angular root mean square velocity of a rotating moelcule if its moment of inertia is equal to $I = 2 .1 \times 10^{-39} g\,cm^2$.
The tendency of $ {BF_3, BCl_3}$ and $ {BBr_3}$ to behave as Lewis acid decreases in the sequence
The tendency of the transition elements to form coloured compounds is attributed to
The temperature at which the r.m.s. velocity of carbon dioxide becomes the same as that of nitrogen at 21 $^\circ$C is
The temperature coefficient of resistivity of semiconductors is
The temperature of a substance increases by $27^{\circ} \, C$. On the Kelvin scale this increase is equal to
The temperature at which the average speed ofthe gas molecules is double to that at atemperature of 27 $^\circ$C is
The symbolic form of "(either p) or (not p )" is
The symbolic form of "p and q" is
The sum of two unit vectors is a unit vector. The magnitude of their difference is
The sun subtends an angle of $\left(\frac{1}{2}\right)^\circ$ on earth. The image of sun is obtained on the screen with help of a convex lens of focal length 100 cm the diameter of the image obtained on the screen will be
The suns angular diameter is measured to be $1920$". The distance of the sun from the earth is $1.496 \times 10^{11}\, m$. What is the diameter of the sun ?