List of practice Questions

Water is used as a moderator in nuclear reactor. Moderator is a light substance that absorb neutrons.
o-Nitrophenol is more volatile than p-nitrophenol Intramolecular hydrogen bonding is present in o-nitrophenol while intermolecular H bonding is in p-nitrophenol.
Centripetal force does no work. Force and displacement are perpendicular to each other.
At pole value of acceleration due to gravity (g) is greater than that of equator. Earth rotates on its axis in addition to revolving round the sun.
All veins carry deoxygenated blood except
A wire of length $l$ carries a steady current. It is bent first to form a circular plane loop of one turn. The magnetic field at the centre of the loop is $B$. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same is
Assuming earth to be a sphere of a uniform density, the value of $g$ in a mine $100\, km$ below the earth surface will be
The angular speed of earth, so that the object on equator may appear weight less, is $ (g=10)\,m/s^{2}$ , radius of earth $6400\,km$
Mass of moon is $ 1/81 $ times that of earth and its radius is $ 1/4 $ the radius of earth. If escape velocity on the surface of the earth is $11.2\,km/s $ . Then the value of escape velocity at surface of the moon will be
Pressure inside two soap bubbles are $1.01$ and $1.02$ atmospheres. Ratio between their volumes is
A block slides down an inclined plane making an angle $ \theta =30^{\circ}$ with the horizontal with an acceleration $ \frac{g}{4} $ , then coefficient of frictions will be
A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $ 1\,m/s$ so as to have same K.E. as that of the boy. The original speed of the man will be
If a cycle wheel of radius $4\,m $ completes one revolution in two seconds. Then acceleration of the cycle will be
A wheel of mass $ 10\,kg $ has a moment of inertia of $ 160\,kg-m^2 $ about its own axis, the radius of gyration will be
A cyclist moves in a circular track or radius $ 100\,m $ . If the coefficient of friction $ 0.2 $ . Then the maximum speed with which the cyclist can take a turn without leaving inwards, is
Smallest internuclear distance is found in
Which of the following hydrogen halides is most basic?
Strongest acid among the following is
Given that $C+O_{2} \rightarrow C O_{2} ; \Delta H^{\circ} = -a\,kJ$. $2 CO + O _{2} \rightarrow 2 CO _{2} ; \Delta H ^{\circ}=- b \,kJ$ The heat of formation of $CO$ is
A solid $AB$ has $NaCl$ type structure. The radius of $A^+$ is $100\, pm$. What is the radius of $B^-$ ?
The common features among the species $CN^-$, CO and $NO^+$ are
The correct order of hybridisation of the central atom in the following species $NH_3$, $[PtCl_4]^{2-}$ , $PCl_5$, and $BCl_3$ is
Which of the following is incorrect : -
Which one of the following is an incorrect statement?
Which one of the following is correctly matched?