List of practice Questions

In a biotic community, the primary consumers are
The primary acceptor, during CO2 fixation in C3 plants, is
Although much $CO_2$ is carried in blood, yet blood does not become acidic, because
The point, at which polytene chromosome appear to be attached together, is called
The polytene chromosomes were discovered for j the first time in
The closure of lid of pitcher in pitcher plant, is due to
The angular speed of a flywheel making 120 revolutions/minute is
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?
The carbon dioxide is transported via blood to lungs mostly
The primary succession refers to the development of communities on a
The pyrenoids are made up of
In an egg, the type of cleavage is determined by
On heating one end of a piece of a metal, the other end becomes hot because of
Identify the correct match between tiger reserve and its state
'Nothing lives for ever, but life continues'. What does it mean?
The number of possible isomers of the compound with molecular formula $C_7H_8 O$ is
The normal boiling point of water is 373 K(at 760 mm). Vapour pressure of water at 298 K is 23 mm. If enthalpy of vaporisation is 40.656 kJ the boiling point of water at 23 mm atmospheric pressure will be
The function $f(x) = [x] \cos \left(\frac{2x-1}{2}\right) \pi$, [.] denotes the greatest integer function, is discontinuous at
The $ BCl_3$ is a planar molecule whereas $NCl_3$ is pyramidal because
The prokaryotic flagella possess
The number of floating ribs in the human body is
The mammalian corpus luteum produces
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
The concentration units independent of temperature would be
The correct order of the $O - O$ bond length in $O_2,H_2 O_2 $ and $O_3 $ is