List of practice Questions

The function of Mehalis glands in Taeniais:
How many g of dibasic acid (mol. wt. 200) should be present in 100 mL of the aqueous solution to give 0.1 normality ?
The resistance of a discharge tube is
A disc is rolling (without slipping) on a horizontal surface. C is its centre and Q and P are two points equidistant from C. Let $v_P$, $v_q$ and $v_c$ be the magnitude of velocities of points P,Q and C respectively, then
Bell-metal is an alloy of
The internal resistance of a cell of e.m.f. 2 V is $0.1\, \Omega$ It is connected to a resistance of $3.9\, \Omega$. The voltage across the cell will be
A potentiometer consists of a wire of length 4 m and resistance $10\, \Omega$ It is connected to a cell of e.m.f. 2 V. The potential difference per unit length of the wire will be
In a meter bridge, the balancing length from the left end (standard resistance of one ohm is in the right gap) is found to be 20 cm. The value of the unknown resistance is
Aldol condensation will not take place in
A person aiming to reach exactly opposite point on the bank of a stream is swimming with a speed of 0.5 m/s at an angle of $ 120^\circ$ with the direction of flow of water. The speed of water in the stream, is
A mass m supported by a massless string wound around a uniform hollow cylinder of mass m and radius R. If the string does not slip on the cylinder, with what acceleration will the mass fall on release?
Haemophilic man marries a normal woman. Their offsprings will be
At $25^\circ $C and 730 mm pressure, 380 mL of dry oxygen was collected. If the temperature is constant, what volume will the oxygen occupy at 760 mm pressure?
In Friedal-Craft's alkylation besides $AlCl_3$ the other reactants are
The average kinetic energy of a gas molecules at $27^{\circ} C$ is $6.21 \times 10^{-21} J$. Its average kinetic energy at $227^{\circ}C$ will be
A body is projected vertically upwards from the surface of a planet of radius $R$ with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is
A mirror forms a real image of unit magnification, Its nature is
Electric charges $+ 10\mu C, + 5\mu C, - 3 \mu C\, and\, + 8 \mu C$ are placed at the comers of a square of side $\sqrt2\,m$. The potential at the centre of the square (V) is
Magnetic field intensity at the centre of coil of 50 turns, radius 0.5 m and carrying a current of 2 A, is
The solubility of a saturated solution of calcium fluoride is $2 \times 10^{-4}$ moles per litre. Its solubility product is
Mean life of a radioactive element is one year. Then its half life is (in year)
Biaxial crystal among the following is
The number of atoms in a radioactive sample reduces from 1000 to 100 in two days. Then the number of atoms remaining at the end of four days is
The joint between atlas and axis is called
Ionisation energy of hydrogen atom is 13.6 eV. Then the energy required to ionise a hydrogen atom in which the electron is in the second orbit from the nucleus is (eV)