List of top Chemistry Questions

The correct structure of tribromooctaoxide is:

Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?

Under isothermal condition, a gas at 300 K expands from 0.1 L. to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is: [Given that 1 L bar=100J]

The biodegradable polymer is:

The mixture that forma maximum boiling azeotrope is :

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 structure of intermediate A in the following reaction, is;

Which one is malachite from the following?

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

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

For the second period elements the correct increasing order of first ionisation enthalpy is :

Match the Xenon compounds in Column-I with its structure in Column II and assign the correct code:

Column I		Column II
A	\(XeF_4\)	I	pyramidall
B	\(XeFe_6 \)	II	square planar
C	\(XeOF_4  \)	III	distorted octahedral
D	\(XeO_3\)	IV	square pyramidal

Code:

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

Identify the incorrect statement related to PCI from the following:

The most suitable reagent for the following conversion, is:

Which of the following is an amphoteric hydroxide?

Which will make basic buffer?

The compound that is most difficult to protonate is:

Which of the following species is not stable ?

The manganate and permanganate ions are tetrahedral, due to:

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

The value of x in the following chemical reaction is
\(C_3H_8 + xO_2 \rightarrow YCO_2 + zH_2O\)

Compounds with spin-only magnetic moment equivalent to five unpaired electrons are