List of practice Questions

What does thermal motion mean ?
What happen to the elastic property of a substance after annealing (cooling slowly after heating)
What does the shaded region represent in the figure given below ?
What current is to be passed for 0.25 s for deposition of a certain weight of metal is equal to its electro-chemical equivalent ?
What do you mean by degenerate orbitals
What does the given figure represent?
What does the negative electronic energy (negative sign for all values of energy) for hydrogen atom means?
What are the products formed when $Li_2CO_3$ undergoes decomposition?
Weight of body at earth's surface is W. At a depth half way to the centre of earth it will be
Weightlessness in satellite is due to
What are the advantage of gobar gas over conventional utilization?
Wavefront of a wave has direction with wave motion
Wavelength of light used in an optical instrument are $\lambda_1=4000A^\circ$ and $\lambda_2=5000A^\circ$ then ratio of their respective resolving powers (corresponding to $\lambda_1$ and $\lambda_2$ ) is
Wax gland present in the ear canal is called
We can derive Newton??
Water will be absorbed by root hairs when
Watson and Crick $(1953)$ proposed $DNA$ double helix model and won the Nobel Prize; their model of $DNA$ was based on (i) $X$-ray diffraction studies of $DNA$ done by Wilkins and Franklin (ii) Chargaff's base equivalence rule (iii) Griffith's transformation experiment (iv) Meselson and Stahl's experiment.
Wave mechanical model of the atom depends upon
Water lost in guttation is
Water stomata are found in
Water is often treated with chlorine to
Water is used as a coolant because
Water has maximum density at
Water flows along a horizontal pipe whose cross-section is not constant. The pressure is 1 cm of Hg where the velocity is $35 cms^{-1}$. At a point where the velocity is 65 $cms^{-1}$, the pressure will be
Water at $4 ^\circ \,C$ is filled to the brim of 2 beakers. A boy perfomed an experiment 'A' of heating and 'B' of cooling. The observation was