List of practice Questions

A stone is thrown up vertically and the height $'x'$ ft reached by it in time $'t'$ secs is given by $x = 80t - 16t^2$ . The stone reaches the maximum height in time ?
If $f\left(x\right)= \cos^{-1} \left(\frac{1-\left(\log _{e} x\right)^{2}}{1+\left(\log _{e} x\right)^{2}}\right)$ , then $ f'\left(\frac{1}{e}\right) =$
If for the curve $y = 1 + bx - x^2$, the tangent at $(1 - 2)$ is parallel to $x$-axis, then $b =$
Damage of Taj Mahal is being caused by .....
Cro-Magnon people were
'C DNA' is a
Brick-red colour in Benedict's test indicates_________percent diabetes patient
Blastopore in frog development occurs in
Axes of polariser and analyser are inclined at an angle $60^{\circ}$. Intensity of emerging light from analyser is $I$. Intensity of light on the polariser is
The science that deals with the application of principles of heredity to the improvement of mankind is
Which one of the following is a sex-linked disease ?
Development of microsporangium in angiosperms and gymnosperms is of
Metadiscoidal placenta is found in
Isogamy is found in
The mode of asexual reproduction in Euglena is
Anthesis is
Circulatory system is absent in
A portion of cardiovasular system that transports oxygen-depleted blood from the heart to the lungs and brings oxygenated blood back to the heart is referred as :
After the industrial revolution melanic moths survived because $\ldots\ldots\ldots\ldots$
A solid melts slightly above 273 K and is a poor conduct or of heat and electricity. To which of the following categories does it belong ?
Decrease in wavelength as a result of scattering is observed in
In Young's double slit experiment, intensities at a bright fringe is $I$. When one of the slits is dosed, intensity at the same position is
A black body emits maximum energy at wavelength $\lambda_0$ when temperature is $T_1$. At temperature $T_2$, it emits maximum energy at $\frac{4}{5} \lambda_0$? Ratio of the two temperature $T_1: T_2$ is
Weight of a body
A plano-convex lens $(f = 20 cm)$ is silvered at plane surface. Now focal length will be