List of top Chemistry Questions

Among the following, the most stable carbocation is
An ionic compound is formed by elements X and Y. Element Y forms a face-centered cubic (FCC) lattice, and element X occupies one-third of the tetrahedral voids. What is the formula of the compound?
A metal crystallizes to form simple cubic unit cell. Calculate the void volume of unit cell. [\(a = 3.36\times 10^{-8}\) cm]
What is the product of decarboxylation of anhydrous sodium benzoate?
Which of the following is correct decreasing order of acidic strength for the compounds listed below?
I: p-chlorophenol, II: p-Cresol, III: p-nitrophenol, IV: p-methoxyphenol.
What is the concentration of hydrogen ion in the solution when the concentration of hydroxyl ion is \(0.08\) mol / dm\(^3\) at \(298\) K ?
Identify the elements of alkali metals and alkaline earth metals respectively having highest 1st ionization enthalpy.
What is the nature of \(\text{Al}_2\text{O}_3\)?
Find the pH of a solution formed by mixing equal volume of solution of \(0.1\) M sodium propionate and \(0.1\) molar propionic acid.
(Given The dissociation constant of propionic acid is \(1.3\times 10^{-5}\))
What is oxidation state of oxygen in \(\text{OF}_2\) and in \(\text{KO}_2\) respectively?
Which of the following ions are responsible for hardness of water?
The enthalpy of combustion of cyclohexane, cyclohexene and \(\text{H}_2\) are respectively \(-3920,-3800\) and \(-241\) KJ mol\(^{-1}\). The enthalpy of hydrogenation of cyclohexene is
A gas expands from a volume of \(1\) dm\(^3\) to \(1.25\) dm\(^3\) under a pressure of \(1\) bar. Find the change in internal energy if \(150\) J of heat is supplied to the system.
Match List I with List II
List I
(Buffers)		List II
(Applications)
(A) \(\text{HCO}_3^{-1}+\text{H}_2\text{CO}_3\)(I) Maintain the pH of blood forms \(7.36\) to \(7.42\)
(B) Phosphates(II) In Medicine
(C) Sodium Citrate(III) In Qualitative analysis of basic radicals
(D) \(\text{NH}_4\text{Cl}+\text{NH}_4\text{OH}\)(IV) In fertilizers

Choose the correct answer from the options given below:
In which of the following processes the internal energy of system remain constant?
A gas occupies a volume of \(0.35\) dm\(^3\) at \(290\) K and \(2\) atm. Pressure. Calculate the volume of gas at STP.
In the compound \(^1\text{CH}_2 = ^2\text{CH}-^3\text{CH}_2-^4\text{CH}_2-^5\text{C}\equiv ^6\text{CH}\), The \(C_2-C_3\) bond is of type
If the energy of an electron in the first Bohr orbit of the H-atom is \(-2.18\times 10^{-18}\) J then the energy of the electron in the second orbit will be
\(1\) g of \(\text{H}_2\) contains the same number of molecules as in
What type of polymer the natural rubber is?
Identify the use of antipyretic drugs.
Which of the following reactions is exhibited only by primary amines?
Identify the cation present in chlorophyll in green plants.
Which from following reagents is used to prepare alkyl isocyanides from RX?
Which carbon atoms of glucose, numbered from 1 to 6 forms a hemiacetal structure between -CHO and -OH groups.?