List of top Chemistry Questions

The $pK_a$ of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which $50\%$ of the acid is ionized is

Styrene can be purified by

Glauber salt is

Plexiglass is a commercial name of

Value of $x$ in potash alum, $K_2SO_4\cdot Al_x(SO_4)_3\cdot 24H_2O$ is

In the following reaction, The produce X is

The temperature of sink of a Carnot engine is 27?C. If the efficiency of engine be 25%, then the temperature of source must be

In producing chlorine through electrolysis 100 W power at 125 V is being consumed. How much chlorine per min is liberated? Electro chemical equivalent of chlorine is $ 0.367\,\times {{10}^{-6}}\,kg/C $ .

Regeneration in Hydra will be faster if it is cut off from

Rayon is

Propene on hydroboration and oxidation produces

Sodium formate on heating gives

Hydrolysis ofphenyl isocyanide forms

When dihydroxy acetone reacts with $HI0_4$, the product is/are

Lucas reagent is

Freon used as refrigerant is

The product of following reaction is $2C{{H}_{3}}MgBr+C{{H}_{2}}O\xrightarrow{{}} $

On hydrolysis $PCl_3$ gives

Which of the following disaccharide has different type of linkage?

Which of the following process will give soap?

$ NaH $ contains how many covalent bonds?

Number of a and $n$ bonds in $C _{6} H _{5} COOH$ are

In the reaction $CH _{3} CH _{2} COONH _{4} {->[{ P _{2} O _{5}}]} A {->[{ H ^{+} / H _{2} O }]}B A$ and $B$ are

The amount of heat released when $20\, mL$ of $0.5 \,M \,NaOH$ is mixed with $100 \,mL$ of $0.1 \,M \,HCl$ is $x \,kJ$. The heat of neutralisation (in $kJ \,mol ^{-1}$ ) is

For a gaseous reversible reaction, which of the following expressions is correct?