List of practice Questions

$CrCl_{3} \cdot 6H_{2}O$ exists in different isomeric forms which show different colours like violet and green. This is due to

Covalency of oxygen cannot exceed $2$ unlike sulphur which can show $+4$ or $+6$ because

Cow?? milk is slightly yellowish in colour due to the presence of

$ {Cr_2 O^{2-}_7 ->[H^+] Cr^{3+} , }$ E wt of $ {Cr_2 O^{2-}_7}$ is

Coulomb's law correctly describes the electric force is that (pick the wrong statement)

$\cos^2 \, 1^\circ + cos^2 2^0 + cos^2 \, 3^0 + ... + \cos^2 \, 90^\circ$ =

$cos[tan^{-1}\{sin(cot^{-1}x)\}]$ is equal to

$\cos \theta .\cos(90 - \theta) - \sin \theta \sin (90 - \theta)$ equals:

Cortisol is secreted from

$\cos^{-1}(\cos\,x)=x$ is satisfied by

Correct sequence of layers of bacterial cell envelope from outward to inward is

Correct sequence of stages of succession on a bare rock is

Corrosion is basically a

Copper matte is put in silica lined converter to

Copper pyrites is concentrated by

Corm is

Coordination number of Cr is six. A complex ion of Cr with $C_2O_4^{ 2-}$, en and superoxide ion, $O_2^ -$ has the formula $[Cr(C_2O_4)_x(en)_y(O_2)_z]^-$. The ratio x : y : z will be

Coordination number of $Zn$ in $ZnS$ (Zine blende) is

Copolymer is

Copper is refined by