List of practice Questions

Bengal famine was caused by
Which of the following do not evolve $O_2$?
Which of the following compound is used as antiknock compound ?
Which of the following is not an antihistamine?
Bacterial conjugation was first shown by
At a time, maximum amount of urea will be present in
At what speed, the velocity head of water is equal to pressure head of $40\, cm$ of Hg?
Terms cistron, mucon and recon were coined by
Which of the following is not of biotic origin?
A vessel contains oil (density $0.8 \, \, g \text{m/cm}^{3}$ ) over mercury (density $= 13.6 \, \, g \text{m/cm}^{3}$ ). A homogeneous sphere floats with half of its volume immersed in mercury and the other half in oil. The density of the material of the sphere in $g \text{m/cm}^{3}$ is
A vertebra with posteriorly concave and anteriorly convex centrum is called
A man throws balls with same speed vertically upwards one after the other at an interval of $2 \,s$. What should be the speed of throw so that more than two balls are in the sky at any time ?
Liquid of density $\rho$ flows along a horizontal pipe of uniform area of cross section $a$ with a velocity $v$ through a right angled bend. What force should be applied to the bend to hold it in equilibrium?
A car is moving on a circular road of diameter $50\, m$ with a speed of $5m\, s^{-1}$. It is suddenly accelerated at a rate of $1 \,ms^{-2}$. If the mas s of the car is $500 \,kg$, then the net force acting on the car is
A train of weight $10^7\, N$ is running on a level track with uniform speed of $36 \,km \,h^{-1}$. The frictional force is $0.5\, kg\, f$ per quintal. If $g = 10\, ms^{- 2}$, power
A stretched string of length $l$ fixed at both ends can sustain stationary waves of wavelength $\lambda$ such that ($n$ is an integer)
A special cell called heterocyst is found in
Which of the following product is formed in the reaction $ { CH3MgBr ->[(i) \, CO_2][(ii) \, H_2O]} ?$
Which of the following statements is correct?
??inged petiole??is found in
Who is the ??ather of endocrinology??
Two identical straight wires are stretched so as to produce $6$ beats per second when vibrating simultaneously. On changing the tension slightly in one of them, the beat frequency still remains unchanged. Denoting by $T_{1}$ and $T_{2},$ the higher and the lower initial tensions in the strings, it could be said that while making the above changes in tension:
Which of the following are correct for axolotl larva? (i) it shows neoteny and paedogenesis (ii) absence of thyroxine affect metamorphosis (iii) it is die larva of hemichordata
Two ships $A$ and $B$ are sailing straight away from a fixed point $O$ along routes such that $?\,AOB$ is always $120^{\circ}$. At a certain instance, $OA = 8\, km, OB = 6\, km$ and the ship $A$ is sailing at the rate of $20 km/hr$ while the ship $B$ sailing at the rate of $30 km/hr$. Then the distance between $A$ and $B$ is changing at the rate (in km/hr) :
Two point charges $ +8q$ and $-2q$ are placed as shown in the figure.
The point where the electric field is zero is