List of top Chemistry Questions

Which will make basic buffer?

An alkene \("A"\) on reaction with \(O_3\) and \(Zn - H_2{0}\) given propanone and ethanol in equimolar ratio. Addition of \(HCI\) to alkene \("A"\) gives. \("B"\)as the major product. The structure of product \("B"\) is : 

\(pH\) of a saturated solution of \(Ca(OH)_2\) is \(9\). The solubility product \((K_{sp})\) of \( Ca(OH)_2\) is: 

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is

For the chemical reaction \(N_2(g)+ 3H_2(g)= 2NH_3(g)\) the correct option is :

Match LIST I with LIST II

LIST I		LIST II
A	Pure nitrogen	I	Chlorine
B	Haber process	II	Sulphuric acid
C	Contact process	III	Ammonia
D	Deacon's process	IV	Sodium azide or Barium azide

Which of the following is the correct option?

The structure of intermediate A in the following reaction, is;

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:

Which is the correct thermal stability order for\( H_2E\) (E=O, S, Se, Te and Po)? 

Among the following, the reaction that proceeds through an electrophilic substitution, is:

Conjugate base for Brönsted acids \(H_2O\) and \( HF\) are

The number of \(\sigma \)and \(\pi\) bonds in pent-2-en-4-yne is: 

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:

The non-essential amino acid among the following is:

A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :

Which of the following diatomic molecular species has only bonds according to Molecular Orbital Theory?

In which case change in entropy is negative? (1)(2) (3 (4)

The correct order of the basic strength of methyl substituted amines in aqueous solution is:

Which of the following reactions are disproportionation reaction?
a)\(2Cu^{+}\rightarrow Cu^{2+}+Cu^{0}\)
\(b)3MnO_4^{2-}+4H^{+} \rightarrow2MnO_4^{-}+MnO_2+2H_2O\)
\(c)2KMnO_4\frac{\Delta}{\rightarrow}K_2MnO_4+MnO_2+O_2\)
\(d)2MnO_4^{-}+3Mn^{2+}+2H_2O \rightarrow 5MnO_2+4H^\oplus\)
Select the correct option from the following:

If the rate constant for a first order reaction is k the time (t) required for the completion of 99% of the reaction is given by:

The mixture that forma maximum boiling azeotrope is :

The biodegradable polymer is:

The correct structure of tribromooctaoxide is:

What is the correct electronic configuration of the central atom in \(K_4[Fe(CN)_6]\) based on crystal field theory?