List of practice Questions

Bioreactors are useful in
The vant Hoff factor of $ BaC{{l}_{2}} $ at $ 0.01 \,M $ concentration is $ 1.98 $ . The percentage of dissociation of $ BaC{{l}_{2}} $ at this concentration is:
Two moles of $ PC{{l}_{5}} $ is heated in a closed vessel of $ 2L $ capacity. When the equilibrium is attained 40% of it has been found to be dissociated. What is the $ {{K}_{c}} $ in $ mol/d{{m}^{3}} $ ?
Audio signal cannot be transmitted because
Barnacles growing on the back of whale is an example for
In which of the following molecules the central atom does not follow the octet rule ?
Human chorionic gonadotropin is secreted by
The hormone which regulates sleep-wake cycle in man is
The respiratory rhythm centre is present in the
During meiosis I, the bivalent chromosomes clearly appear as tetrads during
In the diagram of types of placentation given above 'a', 'b', 'c? and ?d? respectively represent:
Which of the following is not purpose of transpiration ?
The basis of DNA finger-printing is
Arsenic containing medicine used for the treatment of syphilis, is
The monocotyledonous seed contains one large and shield shaped cotyledon known as
An orchid growing as an epiphyte on a mango tree is an example for
An oval depression called fossa is seen on
Match the items in column I with column II and choose the correct answer.
Choose the correct combinations
Find the pairs which are correctly matched with respect to aestivation of petals I. Valvate?Calotropts II. Twisted?Bean III. Imbricate?Cassia IV. Vexillary?China Rose
The distinct features of fabaceae are
An inverted pyramid of number and an inverted pyramid of biomass are respectively seen in
Which of the following are the characters of dinoflagellates ? 1. Planktonic golden yellow algae with soap-box like structure 2. Marine red biflagellated protista 3. Appear yellow, green, brown, blue and red in colour 4. Biflagellated organisms with pellicle 5. Saprophytic (or) parasite unicellular forms
$\int \frac{sec\,x\,dx}{\sqrt{cos\,2\,x}}$ is equal to
An electron revolves in a circle of radius $0.4 \mathring{A}$ with a speed of $10^5 ms^{-1}. $ The magnitude of the magnetic field, produced at the centre of the circular path due to the motion of the electron, in $Wb \, \, m^{-2} $ is