List of top Chemistry Questions

$R-OH + HX \rightarrow RX + H_2O$. the reactivity of alcohols is

Quasi-fluid nature of membrane is due to

Quartz is an example of

Quartz is the crystalline variety of

Pyrosilicates are the silicates in which twotetrahedral units are linked at

Pyrex glass is a mixture of

Pyrolusite is an ore of

Purple of cassius is

Pure water does not conduct electricity because it

Pure nascent hydrogen is best obtained by

Pure methane can be produced by

Protonic acid is

Propanoyl chloride is subjected to reduction with $ {H_2}$ in boiling xylene in the presence of Pd supported on $ {BaSO_4}$. The product formed is

Primary, secondary and tertiary amines may be separated by using

Primary nitro compounds react with nitrous acid to form nitrolic acid which dissolve in NaOH giving

Pressure of $1 \,g$ of an ideal gas $A$ at $27 \, ^{\circ}C$ is found to be $2$ bar. When $2 \,g$ of another ideal gas $B$ is introduced in the same flask at same temperature the pressure becomes $3$ bar. What would be the ratio of their molecular masses?

Pressure versus temperature graph of an ideal gas of equal number of moles of different volumes are plotted as shown in figure. Choose the correct alternative.

Pressure deviation from ideal behaviour takes place because of

Pressure exerted by a perfect gas is equal to

Powdered substances are more effective adsorbents than their crystalline form because

Potassium fluoride $KF$ has $NaCl$ structure. Its density is $248 \,g\, cm^{-3}$ and its molar mass is $58 \,g\, mol^{-1}$. The distance between K+ and F ions in KF is

Potential difference across resting membrane is negatively charged This is due to differential distribution of the following ions

Potassium crystallizes with a

Polyvinyl alcohol can be prepared by

Position of double bond in alkene can be identified by