List of top Chemistry Questions

The oxide that gives H$_2$O$_2$ most readily on treatment with H$_2$O is :

The statements that are TRUE : (A) methane leads to both global warming and photochemical smog (B) methane is generated from paddy fields (C) methane is a stronger global warming gas than CO₂ (D) methane is a part of reducing smog. Choose the most appropriate answer from the options given below :

What are the products formed in sequence when excess of $CO_2$ is passed in slaked lime ?

In the reaction of hypobromite with amide, the carbonyl carbon is lost as :

Given below are two statements :
Statement I : Penicillin is a bacteriostatic type antibiotic.
Statement II : The general structure of Penicillin is :
Choose the correct option :

The correct sequence of correct reagents for the following transformation is :

At 298.2 K the relationship between enthalpy of bond dissociation (in kJ mol$^{-1}$) for hydrogen ($E_H$) and its isotope, deuterium ($E_D$), is best described by :

Which of the following equation depicts the oxidizing nature of $H _{2} O _{2} ?$

The major product of the following reaction is :
CH$_3$CH$_2$CH=CH$_2$ + H$_2$/CO $\xrightarrow{\text{Rh catalyst}}$

The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl$_5$ is :

The major products A and B formed in the following reaction sequence are :

Select the correct statements.
(A) Crystalline solids have long range order.
(B) Crystalline solids are isotropic.
(C) Amorphous solids are sometimes called pseudo solids.
(D) Amorphous solids soften over a range of temperatures.
(E) Amorphous solids have a definite heat of fusion.
Choose the most appropriate answer from the options given below :

Given below are two statements:
Statement I: $\alpha$ and $\beta$ forms of sulphur can change reversibly between themselves with slow heating or slow cooling.
Statement II: At room temperature the stable crystalline form of sulphur is monoclinic sulphur.

Indicate the complex/complex ion which did not show any geometrical isomerism :

The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethylbenzene from benzene is:

Which one of the following compounds will liberate $CO_2$ when treated with $NaHCO_3$?

(A) $HOCl + H _{2} O _{2} \rightarrow H _{3} O ^{+}+ Cl ^{-}+ O _{2}$
(B) $I _{2}+ H _{2} O _{2}+2 OH ^{-} \rightarrow 2 I ^{-}+2 H _{2} O + O _{2}$
Choose the correct option.

Which one of the following compounds is not aromatic ?

Match List - I with List - II : List - I (Class of Drug)
(a) Antacid
(b) Artificial Sweetener
(c) Antifertility
(d) Tranquilizers List - II (Example)
(i) Novestrol
(ii) Cimetidine
(iii) Valium
(iv) Alitame

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :

Consider the above reaction, and choose the correct statement :

Which one of the following complexes is violet in colour ?

Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature ? (Given Z for Nd=60, Yb=70, La=57, Ce=58)

Which one of the following correctly represents the order of stability of oxides, $ X_2O $; (X = halogen) ?

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface ?