List of top Chemistry Questions on Some basic concepts of chemistry asked in JEE Advanced

To check the principle of multiple proportions, a series of pure binary compounds $\left( P _{ m } Q _{ n }\right)$ were analyzed and their composition is tabulated below. The correct option(s) is(are)
 
CompoundWeight % of P Weight % of Q
15050
244.455.6
34060
Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is
Given that the abundant of isotope $^{54}Fe$, $^{56}Fe$ and $^{57}Fe$ are $5\%$, $90\%$ and $5\%$ respectively, the atomic mass of $Fe$ is :
Consider a titration of potassium dichromate with acidified Mohr?s salt solution using diphenylamine as indicator. The number of moles of Mohr?s salt required per mole of dichromate is :
Which has maximum number of atoms?
How many moles of electron weighs 1 kg?
In the standardisation of Na$_2S_2O_3$ using K$_2Cr_2O_7$ by iodometry, the equivalent weight of K$_2Cr_2O_7$ is
The reaction,$3CIO^{-}(aq)\rightarrow CIO_3^- (aq)+2CI^-(aq)$ is an example of
An aqueous solution of $6.3\, g$ oxalic acid dehydrate is made upto $250\, mL$. The volume of $0.1N\, NaOH$ required to completely neutralize $10 \,ml$. of this solution is
The equivalent weight of MnSO$_4$ is half of its molecular weight, when it converts to
In which mode of expression, the concentration of a solution remains independent of temperature?
If two compounds have the same empirical formula but different molecular formulae, they must have
A molal solution is one that contains one mole of solute in
The IUPAC name of the compound having the formula is
If 0.5 mol of $BaCl_2$ is mixed with 0.2 mol of $Na_3PO_4$ the maximum number of moles of $Ba_3(PO_4 )_2$ that can be formed is
2.76 g of silver carbonate on being strongly heated yields a residue weighing
The largest number of molecules is in
The total number of electrons in one molecule of carbon dioxide is
When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is