List of top Chemistry Questions

$200$ joules of heat was supplied to a system at constant volume. It resulted in the increase in temperature of the system from $298$ to $323\, K$. What is the change in internal energy of the system?

Which will give turbidity fastest on reaction with Lucas reagent ?

Carbylamine reaction is given by

German silver is

Atomic no. $81$ is placed in

Fog is an example of

Electronic configuration of $Na$ is

13.6 eV is needed for ionization of a hydrogen atom. An electron in a hydrogen atom in its ground state absorbs 1.50 times as much energy as the minimum required for it to escape from the atom. What is the wavelength of the emitted electron? $\left(m_{e}=9.109\times10^{-31} Kg, e=1.602\times10^{-19} Coloumb, h=6.63\times10^{-34} Js\right)$

10 g of a gas at NTP occupies 5 litres. The temperature at which the volume becomes double for the same mass of gas at the same pressure is

Method used to convert fresh ppt. into colloidal state by adding a small amount of electrolyte is

$10^{-4}$ g of gelatin is required to be added to $ 100 cm^3$ of a standard gold sol to just prevent its coagulation by the addition of $1 cm^3 of 10% NaCl$ solution to it. Hence, the gold number of gelatin is

Which one of the following is an example of heterogenous catalysis?

The reduction of benzoyl chloride with $H_2/Pd\, BaSO_4$ gives

Acetaldehyde can be prepared by

1 faraday of electricity will liberate 1 gram atom of the metal from the solution of

1-Butanol is oxidised with acidified $K_2Cr_20_7$, it gives

$1$, $3$, $5$, $7$-Octatetraene contains $X$ $\sigma$-bonds and $Y$ $\pi$-bonds. $'X'$ and $'Y'$ are

Cobalt containing vitamin is

Vitamin $C$ helps in absorption of

Which vitamin is fat soluble?

Which of the following does not reduce Benedict's solution?

The heats of neutralisation of four acids $A,B,C$ and $D$ when neutralised against a common base are $13$. $7, 9.4,11.2$, and $12.4 \,kcal$ respectively. The weakest and strongest among these acids are respectively

Malachite is an ore of

The electronegativity of the following elements is in the order

Which one of the following statements regarding ammonia is not correct?