List of practice Questions

500 mL of nitrogen at $27^\circ C$ is cooled to $-5^\circ C$ at the same pressure. The new volume becomes

The oxide which cannot act as a reducing agent is

Which of the following is a redox reaction ?
Which of the following protein destroy the antigen when it enters in body cell?
The $\alpha$-D-glucose and $\beta$-D-glucose differ from each other due to difference in carbon atom with respect to its
Uncertainty in position of an electron (mass of an electron is =$9.1\times10^{-28}g)$ moving with a velocity of $3 \times 10 ^4$ cm/s accurate upto 0.001% will be (use $\frac{h}{4\pi}$ in uncertainty expression where $h = 6.626 \times 10^{-27}$ erg s)
The radius of hydrogen atom in the ground state is 0.53 $\mathring{A}.$ The radius of $Li^{2+}$ ion (at. no. = 3) in a similar state is
About 20 km above the earth, there is an ozone layer. Which one of the following statements about ozone and ozone layer is true?
The position vector of a particle is $ \overrightarrow{r} = (a \, \cos \, \omega t) \widehat{i} + (a \sin \omega t) \widehat{j}$. The velocity of the particle is
The pyrenoids are made up of
Besides annelida and arthropoda, the metamerism is exhibited by
'Nothing lives for ever, but life continues'. What does it mean?
The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (e.g. line no. 5 arises from the transition from level B to A). Which of the following spectral lines will occur in the absorption spectrum?
Respiratory quotient (R.) for fatty acid is
In an A.C. circuit, the current flowing is \(I=5sin(100 t - \frac{π}{2}) ampere\) and the potential difference is \(V = 200 sin (100 t) volts\). The power consumption is equal to
The phenomenon in which an allele of one gene supresses the activity of an allele of another gene is known as
In an egg, the type of cleavage is determined by
The plant body of moss (Funaria) is
If enthalpies of formation for $C _{2} H _{4}(g), CO _{2( g )}$ and $H _{2} O _{(1)}$ at $25^{\circ} C$ and $1\, atm$ pressure are $52,-394$ and - $286\, kJ / mol$ respectively, then enthalpy of combustion of $C _{2} H _{4}( g )$ will be
A dental disease characterized by mottling of teeth is due to the presence of certain chemical element in drinking water. Which of the following is that element?
A well developed archegonium with neck consisting of 4-6 rows and neck canal cells, characterises
Which of the following organisms possesses characteristics of a plant and an animal?
The function of contractile vacuole, in protozoa, is
The organisms attached to the substratum, generally, possess
A reaction occurs spontaneously if :