List of practice Questions

Solid NaCl is a bad conductor of electricity because

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?

Soft iron is preferred as the core of transformers due to its :

Soil erosion producing finger-like narrow depressions is called

Solenocytes and metanephridia are excretory organs of

Solid $CH_4$ is

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

Soft drinks and baby feeding bottles are generally made up of

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 metal cannot be stored in

Sodium metal is kept under

Sodium-potassium pump transports

Sodium and copper have work functions 2.3 eV and 4.5 eV respectively. Then, the ratio of their threshold wavelengths is nearest to

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

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

$SO_2$ and $NO_2$ cause polluted by increasing

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

Soap mixed with water below critical micelle concentration behaves as

Smallest flower is

Smelting is usually carried out in

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

Skeletal muscle fibre has light and dark bands. Which his correct match of protein with its light refractive property and colour $\quad$Protein$\quad$$\quad$$\quad$ Colour $\quad$$\quad$$\quad$Property