List of top Chemistry Questions

Among the following the correct order of acidity is :
At $100^{\circ} C$ the vapour pressure of a solution of $6.5 \,g$ of a solute in $100 \,g$ water is $732\, mm$. If $K_b = 0.52$, the boiling point of this solution will be:
The correct statement regarding the basicity of arylamines is:
Predict the correct order among the following:
The addition of a catalyst during a chemical reaction alters which of the following quantities ?
Fog is a colloidal solution of
Which of the following has two stereoisomers?
An aqueous solution of a salt $MX_2$ at certain temperature has a van?t Hoff factor of 2. The degree of dissociation for this solution of the salt is :
A solution contains 4 g of NaOH and 16.2 g of water. The mole fraction solute and solvent are respectively
The following equations indicate reactions that occur spontaneously.
Fe(s) + NiCl$_2$(aq) $\rightarrow$ FeCl$_2$(aq) + Ni(s)
Zn(s) + FeCl$_2$(aq) $\rightarrow$ ZnCl$_2$(aq) + Fe(s)
Ni(s) + PbCl$_2$(aq) $\rightarrow$ NiCl$_2$(aq) + Pb(s)
Which is the increasing order of the reactivity of the metals?
What is the oxidation state of sulfur in HSO$_4^{-}$?
Gas A decomposed according to the following reaction:
A(g) $\rightarrow$ B(g) + C(g)
A student conducted an experiment and determined that the equilibrium pressure of gas A was 0.20 P, where P was the total pressure of the system. What is the equilibrium constant $K_p$ for this reaction?
What is the molality of a 10% (by weight) C$_6$H$_{12}$O solution (molecular weight = 90)?
A 25 mL sample of hard water is titrated with a 0.001 M solution of EDTA, and the end point of the titration is reached at 50 mL of EDTA added. What is the concentration of Ca$^{2+}$ and Mg$^{2+}$ ions in solution?
2CrO$_4^{2-}$ + 3SnO$_2^{2-}$ + H$_2$O → 2CrO$_2^{-}$ + 3SnO$_3^{2-}$ + 2OH$^{-}$
How many moles of OH$^{-}$ form when 50.0 mL of 0.100 M CrO$_4^{2-}$ is added to a flask containing 50.0 mL of 0.100 M SnO$_2^{2-}$?
Which of the following compounds will give racemic mixture on nucleophilic substitution by OH$^{-}$ ions?
Which of the following statements is most likely true concerning the given reaction?
2A(g) + B(g) → 2C(g) + D(s)
In aqueous solution Cu(+1) salts are unstable because
Name the given compound : Cu(ClO$_4$)$_2$
Immediately, upon bringing a hot piece of metal into a room, the heat is felt from 5 m away. The type of heat transfer is probably
Which statement about the bonding between carbon atoms is correct?
Which of the following compound in its anionic form is aromatic.
A 13 g gaseous sample of an unknown hydrocarbon occupies a volume of 11.2 L at STP. What is the hydrocarbon?
Which of the following changes to a reaction will always increase the rate constant for that reaction?
Equal molar quantities of oxygen and hydrogen gas were placed in container A under high pressure. A small portion of the mixture was allowed to effuse for a very short time into the vacuum in container B. Which of the following is true concerning partial pressures of the gases at the end of the experiment?