List of practice Questions

The order of reactivities of methyl halide in the formation of Grignard reagent is:
Work done during isothermal expansion of one mole of an ideal gas from $10$ atm to $1$ atm at $300\, K$ is:
The number of bullets are fired in all possible directions with the same initial velocity $u$. The maximum area of ground covered by bullets is :
The method of classification, called cladistics, is based on:
The maximum energy is possessed by an electron, when it is present:
The main function of lysosome is:
The magnetic field due to a current carrying circular loop of radius $3\, cm$ at a point on the axis at a distance of $4\, cm$ from the centre is $54 \,\mu T$. What will be its value at the centre of the loop?
The magnetic field due to a straight conductor of uniform cross-section of radius a and carrying a steady current is represented by
The limiting molar conductivities $\Lambda^{\circ}$ for NaCl, KBr and KCl are 126, 152 and 150 S $cm^2\, mol^{-1}$ respectively. The $\Lambda^{\circ}$ for NaBr is
The liquefied metal expanding on solidification is :
The Indian salamander is:
The geometrical isomerism is shown by
The energy of a photon is equal to the kinetic energy of a proton. The energy of the photon is E. Let $ \lambda_1 $ be the de-Broglie wavelength of the proton and $ \lambda_2 $ be the wavelength of the photon. The ratio $ \frac{\lambda_1}{\lambda_2} $ is proportional to
The emitter-base junction of a transistor is ............. biased while the collector-base junction is ............. biased.
The element which forms oxides in all oxidation states $+1$ to $+5$ is
The electrostatic force between two charges of $10\,\mu C$ and $20\,\mu C$ at a distance of $2m$ is to be halved. This can be effected by
The direction of Lorentz force can be found by:
The dipole moment is the highest for
The crystal system of a compound with unit cell dimensions $a = 0.387\, nm$, $b = 0.387\, nm$ and $c = 0.504 \,nm$ and $\alpha = \beta = 90^{\circ}$ and $\gamma$ = $120^{\circ}$ is
The correct order of bond angles (smallest first) in $H_2S, NH_3, BF_3$ and $SiH_4$ is
The conjugate base of $H_2PO_4^ -$ is
The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is
The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is
The compound having only primary hydrogen atoms is
The classical example of adaptive radiation in development of new species is