List of top Chemistry Questions

A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 Pa at 298 K. Calculate:
(i) molar mass of the solute 
(ii) vapour pressure of water at 298 K.

Which of the following is not a thermodynamic coordinate?

The correct name of $\left[Pt{\left(N{H}_3\right)}_{4}C{l}_2\right]\left[PtC{l}_4\right]$ is:

Phenyl methyl ether (anisole) reacts with $HI$ to give phenol and methyl iodide and not iodobenzene and methyl alcohol because

The organic halogen compound used as refrigerant in refrigerators and air-conditioners is

Among the following compounds the one that is most reactive towards electrophilic nitration is :

Butene-1 may be converted to butane by reaction with

Which one of the following ions forms most stable complex compound?

In which of the following, functional group isomerism is not possible?

Which of the following cannot work as oxidizing agent ?

The correct order of reactivity of the halides, ethyl chloride $(I)$, isopropyl chloride $(II)$ and benzyl chloride $(III)$ in $S_N1$ reaction is

Among the following molecules: $SO_2,SF_4,ClF_3, BrF_5$ and $XeF_4$, which of the following shapes does not describe any of the molecules mentioned?

In the electrolysis of water, one faraday of electrical energy would evolve at STP

At temperature 300 K for reaction  C2H4(g) + 3O2(g)→ 2CO2(g) + 2H2O(g); ΔH = −336.2 kcal.  The approximate value of ΔU  at 300 K for the same reaction (R = 2 cal degree^{− 1} mol^{− 1}) will be-

Which of the following statements is incorrect?

Consider the reaction between PbS and HNO₃.
PbS + HNO₃ →
Which of the following is not formed.

S-I: Sulphur exists as S8 while oxygen exists as O2.
S-II: In oxygen, pπ-pπ bonding occurs while it is not effective in sulphur.

Which among the following have a single unpaired electron?
N₂, 0₂, CN^-, O₂^-, C₂^2- , N^2-

Which of the following is colorless?

Consider the following compound.

Correct order of their basicity is:

Arrange the following in increasing order of acidity.

Which of the following orbitals has the highest energy?

Number of ambidentate nucleophiles among the following is:
CN^-, SCN^- NO₂^-, CH₃COO^-, C₂0₄^2-, NH₂^-, SO₄^2-

Equal volume of 1 M HCI and 1 M H2SO4 neutralized by dil. NaOH and heat released is x and y kcal respectively, then which is correct?