List of top Chemistry Questions

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?

Pick out the unsaturated fatty acid from the following

An organic compound of molecular formula $C_{4}H_{10}O$ does not react with sodium. With excess of $HI$, it gives only one type of alkyl halide. The compound is

$0.833$ mole of a carbohydrate with empirical formula $CH_{2}O$ , has $10\, g$ of hydrogen. Molecular formula of the carbohydrate is

A neutral compound with molecular formula $C_2H_6O$ evolves hydrogen when treated with

Aspirin, an antipyretic drug is chemically

Substance used for the preservation of colouredfruit juices is

Which of the following is an insecticide ?

The drug that is effective in the treatment of typhoidis

The antiseptic present in Dettol is