List of top Chemistry Questions

Identify from following cell reactions that is spontaneous under standard state of conditions.
A compound formed by elements A and B crystallizes in a cubic structure where A atoms are at the corner of the cube and B atoms are at the center of the cube. What is the formula of the compound?
An element with a molar mass 27g mol\(^{-1}\) forms a cubic unit cell. Calculate the number of atoms present in a unit cell if the density of metal is 2.7g cm\(^{-3}\).
\([a^3\times N_A = 40\) cm\(^3\) mol\(^{-1}]\)
Which of the following dopant is NOT used in Ge to obtain n-type semiconductor?
Identify a pair of gases from following that does not obey Henry's law.
2 g nonelectrolyte solute when dissolved in 50 g water increases its boiling point by 0.13 K.
Calculate the molar mass of solute if molal elevation constant of water is 0.52 K kg mol\(^{-1}\)
Calculate the molar conductivity of 0.2 M KCl solution at 298 K (\(k = 0.0248 \Omega ^{-1}\)cm\(^{-1}\))
Which of the following sentences is true for a basic solution?
Identify the reagent used in Etard reaction
Which of the following statements are TRUE?
(I) Inductive effect operates through the sigma bond
(II) Resonance effect operates through the pi bond
(III) Inductive effects operate through the pi bond
(IV) Resonance effect operates through the sigma bond
The cyclic \(π\)-molecular orbital formed by overlap of p-orbitals must contain,
Which of the following is NOT a redox reaction?
Identify the false statement regarding chirality from the following.
For a certain reaction \(\Delta H = -50\) kJ and \(\Delta S = -100\) J/K find the temperature so that the reaction is spontaneous.
A weak monobasic acid is 0.04 % dissociated in 0.25 M solution. What is pH of the solution?
What is the relationship between the degree of dissociation of a weak base and its concentration?
Calculate the enthalpy change of the reaction,
\(\text{H}_2\text{(g)}+\text{Cl}_2\text{(g)}\rightarrow 2\text{HCl(g)}\)
if bond energies (kJ mol\(^{-1}\)):
H–H = 436, Cl–Cl = 242, H–Cl = 431
Identify the type of hybridization of carbon that is attached to the OH group, in benzylic alcohol?
Calculate the temperature of 2 moles of gas occupying a volume of 5.0 liters at 24.6 atmospheres?
(\(R = 0.0821\) L atm K\(^{-1}\) mol\(^{-1}\))
The electronic configurations of elements are as-
\(A = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2\)
\(B = 1s^2 2s^2 2p^6 3s^2 3p^5\)
Which of the following is formula of ionic compound that could be formed between these two elements A and B?
What is the atomic number of an element having \(ns^1\) electronic configuration and belonging to 3d transition series?
Which of the following pairs represents isobars?
Which of the following contains maximum number of molecules?
What is the result when soap is used in hard water?
Which of the following statement about enzyme is correct ?