List of practice Questions

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?
Which one of the following is not a derived unit ?
The term anomers of glucose refers to :
Which of the following molecules/ions does not contain unpaired electrons ?
Phenyl magnesium bromide reacts with methanol to give :
Total volume of atoms present in a face-centred cubic unit cell of a metal is (r is atomic radius):
The IUPAC name for the complex $[Co(NO_2)(NH_3)_5]Cl_2$ is:
A body initially at rest is moving with uniform acceleration $a$. Its velocity after $n\, s$ is $v$. The displacement of the body in $2\, s$ is :
The magnetic force on a point charge is $\vec{ F }= q (\vec{ V } \times \vec{ B })$ Here, $q=$ electric charge $\vec{ V }=$ velocity of point charge $\vec{ B }=$ magnetic Held The dimension of $\vec{B}$ is :
The first diffraction minimum due to single slit diffraction is $ \theta $ , for a light of wavelength $5000\,?$. If the width of the slit is $ 1\times 10^{-4}, $ then the value of $\theta$ is :
A velocity of a particle at an instant is $10\, m / s$. After $3\, s$ its velocity will become $16\, m / s$. The velocity at $2\, s$, before the given instant will be :
Two stones are projected with same velocity $v$ at an angle $\theta$ and $(90-\theta)$. If $H$ and $H_{1}$ are the greatest heights in the two paths, what is the relation between $R , H$ and $H_{1}$ ?
A particle moves with a velocity $(5i -3j + 6k) ms^{-1}$ undre the influence of a constant force $F=(10 i +10 j +20 K)N .$ The instantaneous power applied to the particle is
A weight $w$ is suspended from the midpoint of a rope, whose ends are at the same level. In order to make the rope perfectly horizontal, the force applied to each of its ends must be:
The energy spectrum of $\beta$-particles [number N(E) as a function of $\beta$-energy E] emitted from a radioactive source is :
In a common-base mode of a transistor, the collector current is 5.488 mA for an emitter current of 5.60 mA. The value of the base current amplification factor ($\beta$) will be :