List of practice Questions

Laterally united anthers with free filaments is the characteristic feature of
Why are vascular bundles termed ?closed? in monocots?
Between breaths, the intrapleural pressure is approximately ___ mmHg less than atmospheric pressure.
In which of the following classes of fungi, sexual reproduction is absent?
Ammonia is a Lewis base and it forms complexes with many cations. Which one of the following cations does not form a complex with ammonia?
Which of the following is an example of absorption?
Which of the following reactions show the process of smelting?
Molecules of a noble gas do not possess vibrational energy because a noble gas
The strength of ${H_2O_2}$ (in g/L) in 11.2 volume solution of ${H_2O_2 }$ is
Which of the following does not show electrical conductance?
A hypothetical electrochemical cell is shown below :- $\overset{T}{A}|A+(xM)||B^+(yM)|\overset{\oplus}{B}$ The emf measured is +0.20V. The cell reaction is:
A cyclic process is shown in the figure. Work done during the cyclic process ABCDA is
A convex lens of focal length 20 cm made of glass of refractive index 1.5 is immersed in water having refractive index 1.33. The change in the focal length of lens is
The 3' - 5' phosphodiester linkages inside a polynucleotide chain serve to join
Select the correct option with respect to cockroaches.
The two slits are 1 mm apart from each other and illuminated with a light of wavelength $5 \times 10^{-7}$ m. If the distance of the screen is 1 m from the slits, then the distance between third dark fringe and fifth bright fringe is
A Carnot?s engine operates with source at $127?C$ and sink at $ 27?C$. If the source supplies 40 kJ of heat energy, the work done by the engine is
A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is
Two capillary tubes of radii 0.2 cm and 0.4 cm are dipped in the same liquid. The ratio of heights through which liquid will rise in the tubes is
A block of wood floats in water with $\left( \frac{4}{5} \right)^{th}$of its volume submerged. If the same block just floats in a liquid, the density of the liquid (in Kg m$^{-3}$) is
A boy walks to his school at a distance of 6 km with constant speed of ${2.5\, km \, h^{-1}}$ and walks back with a constant speed of ${4\, km \, h^{-1}}$. His average speed for round trip expressed in ${ km \, h^{-1}}$, is
From the top of a tower of height 40 m, a ball is projected upwards with a speed of ${20 \,m \, s^{-1}}$ at an angle of elevation of 30?. Then the ratio of the total time taken by the ball to hit the ground to its time to same height is Take ${g = 10 \, m \, s^{-2}}$
Two bars $A$ and $B$ of circular cross-section and of same volume and made of the same material are subjected to tension. If the diameter of $A$ is half that of $B$ and if the force applied to both the rods is the same and it is in the elastic limit, the ratio of extension of $A$ to that of $B$ will be
A 280 day old radioactive substance shows an activity of 6000 dps, 140 days later its activity becomes 3000 dps. What was its initial activity?
Which of the following hormones contains iodine?