List of practice Questions

According to Lewis concept of acids and bases,ethers are
According to Bohr hypothesis, discrete quantity is
According to Bohr?? theory, the wave number of last line of Balmer series is $(R = 1.1 \times 10^7 \,m^{-1})$
Accessory photosynthetic pigments in most green plants are
According to Allen's Rule, the mammals from colder climates have
According to binomial nomenclature, scientific name of an organism consists of
Accelerated eutrophication occurs due to
Accessory excretory organs of man are
Absorption of water from soil by seeds increases the _______ thus helping seedlings to come out of soil.
Abdominal muscles and internal intercostal muscles contract actively during
Abiogenesis theory of origin supports
About $6\%$ of the power of a $100\, W$ light bulb is converted to visible radiation. The average intensity of visible radiation at a distance of $8\, m$ is (Assume that the radiation is emitted isotropically and neglect reflection.
Absence of circulatory system in Hydra is compensated by
A120 V, 60Hz a.c. power is connected $800\Omega$ non-inductive resistance and unknown capcitance in series. The voltage drop across the resistance is found to be 102V, then voltage drop across eapacitor is
ABC is a triangle and AD is the median. If the coordinates of A are ( 4, 7, - 8)and the coordinates of centroid of the triangle ABC are (1, 1, 1), what are the coordinates of D?
ABCD is a convex quadrilateral. 3, 4, 5 and 6 points are marked on the sides AB, BC, CD and DA respectively . The number of triangles with vertices on different sides is
A wire of length $L$, radius $r$ when stretched with a force $F$ changes in length by $l$. What will be the change in the length of a wire of same material having length $2L$, radius $2r$ and stretched by a force $2F$ ?
A wire of resistance R is elongated n-fold to make a new uniform wire. The resistance of new wire
A x molal solution of compound in benzene has a mole fraction of solute equal to 0.2. The value of x is
A wire is stretched between two rigid supports vibrates in its fundamental mode with a frequency of $50 \,Hz$. The mass of the wire is $30 \,g$ and its linear density is $4 \times 10^{-2}\, kg \,m s^{-1}$. The speed of the transverse wave at the string is
A wire is stretched to double its length. The strain is :
A wire of length $36 \,m$ is to be cut into two pieces. One of the pieces is to be made into a square and the other into a circle. What should be the lengths of the two pieces, so that the combined area of the square and the circle is minimum?
A wire of length $L$ has a linear mass density $\mu$ area of cross-section $A$ and Young?? modulus Y. It is suspended vertically from a rigid support. The extension produced in the wire due to its own weight is
A wheel with $20$ metallic spokes each of length $0.8 \,m $ long is rotated with a speed of $120$ revolution per minute in a plane normal to the horizontal component of earth magnetic field $H$ at a place. If $H = 0.4 \times 10^{-4}\, T$ at the place, then induced emf between the axle and the rim of the wheel is
A white precipitate is obtained by the hydrolysis of