List of practice Questions

A wire mesh consisting of very small squares is viewed at a distance of $8 \,cm$ through a magnifying converging lens of focal length $10\, cm$, kept close to the eye. The magnification produced by the lens is
A uniform rod of length $\ell$ and mass $m$ is free to rotate in a vertical plane about $A$. The rod initially in horizontal position is released. The initial angular acceleration of the rod is (Moment of inertia of rod about $A$ is $\frac{m \ell^{2}}{3}$ ):
Which of the following is secondary pollutant?
Which of the following is the most basic oxide ?
When sound waves travel from air to water, which one of the following remains constant?
In methane the bond angle is:
If $a_{r}$ and $a_{t}$ represent radial and tangential accelerations, the motion of a particle will be uniformly circular if:
How many isomers are possible for the alkane $C_{4}H_{10}$ ?
Dipole moment is shown by:
Cyanide process is used for the extraction of
The action of enzymes in living system is to:
Correct gas equation is:
Which combinations of quantum numbers $n, l, m$ and $s$ for the electron in an atom does not provide a permissible solution of the wave equation?
$ Ca^{2+}$ is isoelectronic with:
Consider the following equation of Bernoulli's theorem. $P+\frac{1}{2} \rho v^{2}+\rho g h=K \text { (constant) }$ The dimensions of $K / P$ are same as that of which of the following ?
Which of the following compounds is carborundum?
An $L-C$ circuit is in the state of resonance. If $C=0.1\, \mu F$ and $L=0.25\, H$, neglecting ohmic resistance of circuit, what is the frequency of oscillations?
Which of the following molecules has pyramidal shape?
Photochemical smog pollution does not contain-
A forward biased diode is :-
Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is-
Which of the following statements is incorrect?
Which of the following statements is incorrect ?
Which of the following statements is incorrect ?
Which of the following statements is true?