List of practice Questions

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?
Glucose on treatment with Tollens reagent produce silver mirror. This shows the presence of:
The random motion of colloidal particles in the dispersion medium is known as:
$Ag _{2} O + H _{2} O _{2} \longrightarrow 2 Ag + H _{2} O + O _{2}$ In the above reaction $H _{2} O _{2}$ acts as a :
The value of azimuthal quantum number $ (l) $ is $2$ then the value of principal quantum number $ (n) $ is:
The formula of malachite ore is:
The IUPAC name of $Ni ( CO )_{4}$ is :
Which compound is formed when calcium carbide reacts with heavy water?
What is true for plasmid : -