List of practice Questions

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group ?
A block A of mass $m_1$ rests on a horizontal table. A light string connected to it passes over a frictionless pully at the edge of table and from its other end another block B of mass $m_2$ is suspended. The coefficient of kinetic friction between the block and the table is $\mu_k$. When the block A is sliding on the table, the tension in the string is
Consider $3^{rd}$ orbit of $He^+$ (Helium), using non-relativistic approach, the speed of electron in this orbit will be [given $ K= 9 \times 10^9$ constant, Z = 2 and h (Planck's Constant) = $6.6 \times 10^{-34} J s$]
Two metal wires of identical dimensions are connected in series. If $\sigma_1$ and $\sigma_2$ are the conductivities of the metal wires respectively, the effective conductivity of the combination is
A resistance 'R' draws power 'P' when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes 'Z', the power drawn will be
What is the mole fraction of the solute in a $1.00\, m$ aqueous solution ?
A circuit contains an ammeter, a battery of $30\, V$ and a resistance $40.8\, ohm$ all connected in series. If the ammeter has a coil of resistance $480\, ohm$ and a shunt of $20\, ohm$, the reading in the ammeter will be
A potentiometer wire of length $L$ and a resistance $r$ are connected in series with a battery of e.m.f. $E_0$ and a resistance $r_1$ An unknown e.m.f. $E$ is balanced at a length $l$ of the potentiometer wire. The e.m.f. $E$ will be given by
A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as
Erythropoiesis starts in
A gene showing codominance has
The term 'linkage' was coined by
Multiple alleles are present
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
In human females, meiosis-II is not completed until
Which of the following layers in an antral follicle is a cellular?
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
Alleles are
An electron moves on a straight line path $XY$ as shown. The abcd is a coil adjacent to the path of electron. What will be the direction of current, if any, induced in the coil?
The dimension of magnetic flux is
Values for Brewster's angle can be
Buna-$N$ synthetic rubber is obtained by copolymerisation of
Let $X$ be a random variable with its expectation $ E(X)=3 $ and its variance $ V(X)=2 $ . If $V$ is another random variable defined by $ Y=10X, $ then the ordered pair $ (E(Y),\,V(Y)) $ is equal to
The number of the solutions of the equation $ {{5}^{2x-1}}+{{5}^{x+1}}=250, $ is/are
A unit cell with edge length $ a\ne b\ne c $ and axial angles $ \alpha =\beta =\gamma =90^{\circ} $ is called