List of practice Questions

An object and its real image are located at distances $25\, cm$ and $40 \,cm$ respectively from the two principal foci of a convex lens. The linear magnification of the image is near to
An ion with mass number $37$ possesses one unit of negative charge. If ion contains $11.1\%$ more neutrons than electrons, the symbol of the ion, $X$, is
An ecologist uses the term biodiversity for the variety of species of
Body of ovule is attached to funicle at a point called
Nerve impulse transmission at neuromuscular junction requires
Pressure sensitises
Which is not a function of progesterone
Among the RNA polymerases, the RNA polymerase-II transcribes
Mammalian kidney is
The compound that does not liberate $CO_2$, on treatment with aqueous sodium bicarbonate solution, is
The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to
The carbon-based reduction method is not used for the extraction of
Upon treatment with ammoniacal $H_2 S$, the metal ion that precipitates as a sulphide is
Among $P, Q, R$ and $S$, the aromatic compounds(s) is/are
Acid anhydride on reaction with primary amines give
What is the total number of electrons that can have the values $n=2, l=1, s=1 / 2$ in the electronic configuration $1 s^{2} 2 s^{2} 2 p^{3} ?$
Calculate the wavelength associated with an electron moving with a velocity of $10^{6} m / s$ (mass of $e^{-}=9.1 \times 10^{-31} kg,\, \left. h=6.6 \times 10^{-34} kg\, m ^{2} s ^{-1}\right)$
Which of the following pairs is not correctly matched?
Above the Boyle temperature, the compressibility factor of the real gases, $ Z $ is
The bond order of $N _{2}^{+}$on the basis of molecular orbital theory is [Atomic number of $N =7$ ]
A uniform rope of mass $ 0.1 \,kg $ and length $ 2.45 \,m $ hangs from a ceiling. The time taken by a transverse wave to travel the full length of the rope is
A thermodynamic state of a given sample of an ideal gas is completely described, if its
A steady current $I$ flows along an infinitely long hollow cylindrical conductor of radius $R$. This cylinder is placed coaxially inside an infinite solenoid of radius $2R$. The solenoid has $n$ turns per unit length and carries a steady current $I$. Consider a point $P$ at a distance $r$ from the common axis. The correct statement(s) is (are)
A rectangular sheet of fixed perimeter with sides having their lengths in the ratio $8 : 15$ is converted into an open rectangular box by folding after removing squares of equal area from all four corners. If the total area of removed squares is $100$, the resulting box has maximum volume. Then the lengths of the sides of the rectangular sheet are
A particle of mass $m$ is projected from the ground with an initial speed $u _{0}$ at an angle $\alpha$ with the horizontal. At the highest point of its trajectory, it makes a completely inelastic collision with another identical particle, which was thrown vertically upward from the ground with the same initial speed $u_{0}$. The angle that the composite system makes with the horizontal immediately after the collision is