List of practice Questions

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

Skull of man is

Six cards and six envelopes are numbered $1$, $2$, $3$, $4$, $5$, $6$ and cards are to be placed in envelopes so that each envelope contains exctly one card and no card is placed in the envelope bearing the same number and moreover the card numbered $1$ is always placed in envelope numbered $2$. Then the number of ways it can be done is

Six moles of an ideal gas performs a cycle shown in figure. If the temperature are $T_A = 600\, K, T_B = 800\, K, T_C = 2200 \,K$ and $T_D = 1200\, K$, the work done per cycle is approximately