List of top Chemistry Questions

Under which of the following conditions, the gases does not follow Henry's law?
Determine the specific rate constant of the reaction. If the half-life period of a first-order reaction is 1402 s, then the rate constant is:
An aqueous solution of \( X \) on addition of hydrogen peroxide in ice-cold conditions gives blue colour to the ethereal layer. Then, \( X \) can be:
Which one of the following sets of monosaccharides forms sucrose?
Carbon monoxide is poisonous to human beings because:
Which of the following has highest mass ?
The valency of Calcium is
When the equation,\(\text{Na} + \text{H}_2\text{O} \rightarrow \text{NaOH} + \text{H}_2\) is balanced,what is the coefficient for 'Na' ?
The chemical reaction in which heat is absorbed is called
Which of the following atomic numbers of elements have similar chemical properties?
Atomic number of an element is 17 then the period to which this element belongs
How many s-block and p-block elements are there in the second period of the modern periodic table ?
In the modern periodic table group 2 (IIA) elements are called as
Which of the following is not an inert gas element ?
Which one of the following is not a product in the electrolysis of aqueous NaCl ?
The orbital which is filled with electrons immediately after '3p' is -
The impurities present in the ore is called as
The correct set of four quantum number values for the valence electron of sodium atom is
In electrolytic refining of metals, the pure metal is taken as
Which of the following is an ore of Iron ?
When n = 4, the total number of subshells in an orbit is n =
Which of the following has larger wavelength in electromagnetic spectrum?
Which of the following is used as a flux in the smelting of Haematite?
The reaction that takes place in Thermite process is
What does the symbol '∆' represent in a chemical equation ?