List of practice Questions

Deficiency symptoms of nitrogen and potassium are visible first in

Equal masses of $H_2, O_2$ and methane have been taken in a container of volume V at temperature $27^\circ$C in identical conditions. The ratio of the volumes of gases ${H_2 : O_2 :CH_4}$ would be

Five kingdom system of classification suggested by R.H. Whittaker is not based on

For a given exothermic reaction, $K_p$ and $K_p'$ are the equilibrium constants at temperatures $T_1$ and $T_2$, respectively. Assuming that heat of reaction is constant in temperature range between $T_1$ and $T_2$, it is readily observed that :-

Fruit colour in squash is an example of

Function of filiform apparatus is to

Hydrogen atom in ground state is excited by a monochromatic radiation of $\lambda$ = 975 $\mathring{A}$. Number of spectral lines in the resulting spectrum emitted will be

If the focal length of objective lens is increased then magnifying power of

In acidic medium, $H_2O_2 $ changes $ Cr_2O_7^{2-} $ to $CrO_5 $ which has two (-O-O-) bonds. Oxidation state of Cr in $CrO_5 $ is

In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is $G$, the resistance of ammeter will be

The main function of mammalian corpus luteum is to produce:

In the Young's double slit experiment, the intensity of light at a point on the screen where the path difference $\lambda$ is K,( $\lambda$ being the wavelength of light used). The intensity at a point where the path difference is ${\lambda}/4 $ will be

In vitro clonal propagation in plants is characterized by

In which one of the following processes CO2 is not released?

Injury localized to the hypothalamus would most likely disrupt

Light with an energy flux of $ 25 \times 10^4 W m^{-2} $ falls on a perfectly reflecting surface at normal incidence. If the surface area is $ 15 c m^2 $, the average force exerted on the surface is

Reason of lanthanoid contraction is

The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index p, of the prism is

The barrier potential of a $p-n$ junction depends on (1) type of semiconductor material (2) amount of doping (3) temperature Which one of the following is correct?

The binding energy per nucleon of \(Li\) and \(He\) nuclei are \(5.60\, MeV\) and \(7.06\, MeV\) respectively. In the nuclear reaction \(^7_3Li+_1^1H \rightarrow  _2^4He + _2^4He+Q\) the value of energy Q released is

The main function of mammalian corpus luteum is to produce

The mean free path of molecules of a gas, (radius 'r') is inversely proportional to :

The motile bacteria are able to move by

The organization which publishes the Red list of species is

The pair of compounds that can exist together is