List of top Chemistry Questions

Specify the coordination geometry around and hybridisation of N and B atoms in a 1 : 1 complex of $BF_3$ and $NH_3$.

$sp^3$ has s-character

Species acting both Bronsted acid and base is

Some medicines are more effective in the colloidal form because of

Solubility of iodine in water may be increased by adding

Solubility curve of $Na_2SO_4?10H_2O$ in water with temperature is given as shown in the figure. From the figure, we can say that

Solid $X$ is a very hard solid which is electrical insulator in solid as well as in molten state and has extremely high melting point. What type of solid is it?

Solid NaCl is a bad conductor of electricity because

Solid $ {CO2}$ is known as dry ice:

Solid $CH_4$ is

Soft drinks and baby feeding bottles are generally made up of

Sodium sulphate is soluble in water but barium sulphate is insoluble because

Sodium thiosulphate $(Na_2S_2O_3.5H_2O)$ is used in photography to

Sodium when dropped in water catches fire because

Sodium metal cannot be stored in

Sodium metal is kept under

Sodium extract of Lassaigne?? solution is treated with, $FeSO_4, FeCl_3$ and $dil.H_2SO_4$ to get a blood red colour. Which of the following is probable organic compound?

Sodium carbonate can be manufactured by Solvay??s process but potassium carbonate cannot be prepared because

Soaps do not work in hard water containing calcium and magnesium ions because

Soap mixed with water below critical micelle concentration behaves as

$SO_2$ and $NO_2$ cause polluted by increasing

$SO_2$ is one of the air pollutants. $SO_2$

$ {SnCl2}$ gives a precipitate with a solution of $ {HgCl2}$. In this process $ {HgCl2}$ is

Smelting is usually carried out in

$ {SnCl2 + 2HgCl2 -> }$$\underset{\text{White ppt.}}{ {(A)}}$ $ {(A) + SnCl2 -> }$$\underset{\text{Grey}}{ {(B)}}$ A and B are