Some Basic Concepts of Chemistry · Chemistry · MHT CET

Which of the following pair of compounds demonstrates the law of multiple proportions?

What is number of atoms present in $$2.24 \mathrm{~dm}^3 \mathrm{~NH}_{3(\mathrm{~g})}$$ at STP?

Calculate the percent atom economy when a product of formula weight $$175 \mathrm{u}$$ is obtained in a chemical reaction using $$225 \mathrm{u}$$ for...

According to reaction, $$\mathrm{Mg}(s)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{MgCl}_2(a q)+\mathrm{H}_2(g) \uparrow .$$ Calculate the mass of $$...

What is the value of percent atom economy when an organic compound of formula weight $$75 \mathrm{~u}$$ is obtained from reactants having sum formula ...

Which from following substances consists of total 1 mole atoms in it? (Molar mass of $$\mathrm{NH}_3=17, \mathrm{H}_2 \mathrm{O}=18, \mathrm{~N}_2=28,...

How many moles of nitrogen atoms are present in $$8 \mathrm{~g}$$ of ammonium nitrate? (Molar mass of ammonium nitrate $$=80$$ )

Calculate the $$\mathrm{pH}$$ of a buffer solution containing $$0.01 ~\mathrm{M}$$ salt and $$0.004 \mathrm{~M}$$ weak acid. $$\left(\mathrm{pK}_{\mat...

What volume of ammonia is formed when $$10 ~\mathrm{dm}^3$$ dinitrogen reacts with $$30 ~\mathrm{dm}^3$$ dihydrogen at same temperature and pressure?...

Identify number of moles of donor atoms in $$2 \mathrm{n}$$ mole of $$\mathrm{SCN}^{-}$$.

Which of the following concentration terms depends on temperature?

What is the mass in gram of 1 atom of an element if its atomic mass is $$10 ~\mathrm{u}$$ ?

How many moles of urea are present in 5.4 g ? (Molar mass = 60)

Which among the following is NOT an extensive property?

What is the volume (in dm$$^3$$) occupied by 75 g ethane at S.T.P. ?

"Mass can neither be created nor destroyed" is the statement of

What amount of oxygen is used at S.T.P. to obtain 9 g water from sufficient amount of hydrogen gas?

What is value of percent atom economy if formula weight of product is 46 u and sum of formula weight of all reactants is 92 u?

What is the molarity of solution containing $$3.2 \mathrm{~g}$$ of $$\mathrm{NaOH}$$ (molar mass $$40 \mathrm{~g} \mathrm{~mol}^{-1}$$) in $$250 \math...