List of practice Questions

A hyperbola having the transverse axis of length $2\, sin\, \theta$, is confocal with the ellipse $3x^2 + 4y^2 = 12$. Then its equation is
A hydrcarbon reacts with hypochlorous acid to give 2-chloroethanol. The hydrocarbon is
A hydride (X) of Group 15 element is distinctly basic and has unexpeclably high boiling point. It reacts with NaOCl to give another hydride (Y), which is a strong reducing agent and is used in organic analysis. X and Y are
A hollow sphere partly filled with water has moment of inertia I when it is rotating about its own axis at an angular velocity $\omega$. If its angular velocity is doubled then its moment of inertia becomes
A hollow glass prism gives
An insulator plate is passed between the plates of a capacitor. Then the displacement current
Time period of a simple pendulum of length $l$ is $T_{1}$, and time period of a uniform rod of the same length $l$ pivoted about one end and oscillating in a vertical plane is $T_{2}$. Amplitude of oscillation in both the cases is small. Then $T_{1}/T_{2}$ is
A circuit consists of five identical conductors as shown in figure. The two similar conductors are added as indicated by the dotted lines. The ratio of resistances before and after addition will be
A hole is drilled in a copper sheer. The diameter of the hole is 4.24 cm at 27.0$^\circ$C . What is the change in the diameter of the hole when the sheet is heated to 227$^\circ$C ? Coeffecient of linear expansion of copper = $1.70 \times 10^{-5}\,K^{-1}$
A hiker stands on the edge of a cliff $490\,m$ above the ground and throws a stone horizontally with a speed of $15\,ms^{-1}$. The time taken by the stone to reach the ground is
A heavy box having a mass of $300\, kg$ is pulled along the floor for $10\, m$. If the coefficient of sliding friction is $0.2$, kilocalories of heat produced is
A heavy nucleus at rest breaks into two fragments which fly off with velocities in the ratio 3 : 1. The ratio of radii of the fragments is
A helium nucleus makes full rotation in a circle of radius 0.8 min 2 s. The value of'magnetic field B at the centre of the circle, will be $(\mu _0=$ permeability constant)
A heat engine absorbs heat $Q_1$ at temperature $T_1$ and heat $Q_2$ at temperature $T_2$. Work done by the engine is $(Q_1 + Q_2)$. This data
Blood calcium level is a resultant of how much dietary calcium is absorbed, how much calcium is lost in the urine, how much bone dissolves releasing calcium into the blood and how much calcium from blood enters tissues. A number of factors play an important role in these processes. Mark the one which has no role
Estradiol is
Extracellular hormone receptors are
Dihydrosterone is active form of
Exophthalmia or Graves disease is caused by
Secretory activity of digestive glands is checked by
Sex corticoids are secreted by
A halogen atom combines with another non-metal to form a compound with slight metallic lustre. The halogen atom is
A guitar string is $90\, cm$ long and has a fundamental frequency of $124\, Hz$. To produce a fundamental frequency of $186\, Hz$, the guitar should be pressed
A group of fungi with septate mycelium in which sexual reproduction is either unknown or lacking are classified under
A Grignard reagent may be made by reacting magnesium with