List of practice Questions

The alga used for quick sewage disposal is:
Lactic acid is produced by Rhizopus species:
Biosphere consists of
Avena curvature test is a bioassay for examining the activity of
Water in liquid state is more stable than ice at room temperature. Water in liquid form has higher entropy than ice.
In the iodometric titration starch is used as an indicator. Starch is a polysaccharide.
In optical fibre, the diameter of the core is kept small. This smaller diameter of the core ensures that the fibre should have incident angle more than the critical angle required for total internal reflection.
In angiosperms the conduction of water is more efficient because their xylem has vessels. Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma rich in mitochondria.
Graphite is an example of tetragonal crystal system. For a tetragonal system, $a=b \neq c, \alpha=\beta$ $=90^{\circ}, \gamma=120^{\circ}$
Cobalt-$60$ is useful in cancer therapy Cobalt-$60$ is a source of $\gamma$-radiations capable of killing cancerous cells.
A thin stainless steel needle can lay floating on a still water surface. Any object floats when the buoyancy force balances the weight of the object.
Animals giving birth to young ones are
Largest bird is
Reptile living both on land and water is
Whale is member of class
Canal system occurs in
Embryo sac represents
Retrogressive metamorphosis occurs in
Hydra reproduces a sexually through
An infolding in bacteria of cell membrane is
Cell organelle connecting cell membrane with nuclear envelope is
Acceleration due to gravity at earth's surface is $g \,ms ^{-2}$. Find the effective value of gravity at a height of $32\, km$ from sea level $:\left(R_{e}=6400 \,km \right)$
Near earths surface, time period of a satellite is $4 h$. Find its time period at height $4R$ from the centre of earth :
A body of mass $0.1\, kg$ attains a velocity of $ 10\,ms^{-1}$ in $0.1 \,s.$ The force acting on the body is :
If force $\vec{ F }= 5 \hat{ i }+3 \hat{ j }+4 \hat{ k }$ makes a displacement of $\vec{ s }=6 \hat{ i }-5 \hat{ k }$, work done by the force is :