List of practice Questions

Find error in calculation of resistivity of R = 65 ? 1 O l = 5 ? 0.1 mm d = 10 ? 0.5 mm
Favourable condition for product formation in the given reaction. $SO_{2}\left(g\right)\quad \frac{1}{2}O_{2}\left(g\right)\quad\quad SO_{3}\left(g\right);$ $\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad H=-42\,kj\,is$
Energy flow in an ecosystem is
Dikaryon formation is the characteristic feature of
[Cr(HO)]Cl (atomic number of Cr = 24) has a magnetic moment of 3.83 BM. The correct distribution of 3d-elections in the chromium present in the complex is
Element A and B have electronegativities 3 and 1.2 respectively? Nature of bond between them?
Cell wall of fungi is composed of :
Cassiterite is ore of :
Both chasmogamous and cleistogamous flowers are present in
Best stage to observe shape, size and number of chromosomes is ______
Grignard reagent can?t be prepared from
Which of the following is invert sugar?
Formula of plaster of paris is :
Due to ? decay, what is the effect on neutron and proton numbers?
Two concentric circular coil of radius 20 cm and 30 cm carries current of 2A and 3A respectively in opposite direction then magnetic field at centre will be :-
A particle is thrown vertically up with speed 6 m/s. Find maximum height achieved.
Find pressure on swimmer at a depth of 10 m in water.
The magnitude of point charge due to which the electric field 30 cm away has the magnitude ,$2 \, NC^{-1}$ will be
The common impurity present in bauxite is
Tertiary alkyl halide is practically inert to substitution by $S_N2$ mechanism because of
Snow blindness is caused due to
For a cell reaction involving two electron changes, ${E^{\circ}_{cell} = 0.3 \, V}$ at $ 25^{\circ} C$. The equilibrium constant of the reaction is
An object is placed at a distance of 20 cm from the pole of a concave mirror of focal length 10 cm. The distance of the image formed is
A step-up transformer operates on a 230 V line and a load current of 2 A. The ratio of primary and secondary windings is 1 : 25. Then the current in the primary is
A man weighing 60 kg is in a lift moving down with an acceleration of $1.8 \, ms^{-2}$. The force exerted by the floor on him is