List of top Chemistry Questions

Equimolar solutions of the following compounds are prepared separately in water. Which will have the lowest pH value ?

Calcination is the process in which:

The correct set of four quantum numbers for the valence electrons of rubidium atom $(Z = 37)$ is

Arrange the following compounds in the order of decreasing acidity

Volume of 3%solution of sodium carbonate necessary to neutralise a litre of 0.1 N sulphuric acid is

Volume of 3%solution of sodium carbonate necessary to neutralise a litre of 0.1 N sulphuric acid is

A mixture of chlorides of copper, cadmium, chromium, iron, and aluminium was dissolved in water acidified with HCl and hydrogen sulphide gas was passed for sufficient time. It was filtered, boiled and a few drops of nitric acid were added while boiling. To this solution ammonium chloride and sodium hydroxide were added and filtered. The filtrate shall give test for.

Identify the product C in the series

Nucleophilic addition reaction will be most favoured in

Which of the following is less acidic among the given halogen compounds?

In an \( \text{S}_\text{N}2 \) substitution reaction of the type \( \text{R} - \text{Br} + \text{Cl}^- \xrightarrow{\text{DMF}} \text{R} - \text{Cl} + \text{Br}^- \), which one of the following has the highest relative rate?

At high pressure, the entire surface gets covered by a monomolecular layer of the gas follows

Which of the following is incorrect with respect to property indicated?

Velocity constant of a reaction at 290 K was found to be \( 3.2 \times 10^{-3} \). At 300 K it will be:

The pair in which both species have same magnetic moment (spin only value) is:

Strong reducing behaviour of \( \text{H}_3 \text{PO}_4 \) is due to

The electrolytic cells, one containing acidified ferrous chloride and another acidified ferric chloride are connected in series. The ratio of iron deposited at cathodes in the two cells when electricity is passed through the cells will be:

Equal weights of NaCl and KCl are dissolved separately in equal volumes of solutions. Molarity of the two solutions will be:

Due to Frenkel defect, the density of ionic solids

A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At wt. = 177). The oxidation state of the metal in the salt is

What will be the main product when acetylene reacts with hypochlorous acid?

The greenhouse effect is because of the