List of top Chemistry Questions

Which of the following is not an amphoteric substance ?
Correct order of reactivity:
Which of the following product is formed in the reaction $ CH_3MgBr {->[(i)CO_2][(ii)H_2O]} ? $

Acrolein is a hard,horny and a high melting point material. Which of the following represent its structure:

The final product C, obtained in this reaction, would be:
final product C

Which of the following pairs of compounds are enantiomers:

The value of Planck's constant is 6.63×10–34Js. The velocity of light is 3.0×108 ms–1. Which value is closest to the wavelength in nanometers of a quantum of light with a frequency of 8×1015 s–1:

What is the entropy change (in JK–1mol–1) when one mole of ice is converted into water at 0ºC?(The enthalpy change for the conversion of ice to liquid water is 6.0 KJ mol–1 at 0ºC)
Which one of the following is a free-radical substitution reaction:

The radioisotope, tritium 13(H) has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how many milligrams of it would remain after 49.2 years:

When m-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are) 
In a set of the given reactions, acetic acid yielded a product C.
CH3COOH+PCl5 \(\rightarrow\) A  \(\xrightarrow[Anh.\,AlCl_3]{C_6H_6}\) B  \(\xrightarrow[ether]{C2H5MgBr}\)  ‘C’, product C would be 
A and B in the following reactions are : 
HCN/KCN

The compound on reaction with NaIO4 in the presence of KMnO4 given:

IUPAC name of the compound given below is:

H3CCH3CH3CH3

Which one of the following monomers gives the polymer neoprene on polymerization :
The $pH$ of a solution is $5.0$. If $H ^{+}$ion concentration is decreased $100$ times. Then the solution will be:
Percentage of silver in the alloy German silver is:
The molar heat capacity of water at constant pressure, C, is 75 JK–1mol–1. When 1.0 KJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is:
The mixture of concentrated $HCl$ and $HNO _{3}$ made in $3: 1$ ratio contains
Which one of the following expressions represent the electron probability function ?
$ \text{O}_{2}^{2-} $ is the symbol of...... ion.
The noble gas used in atomic reactors is:
What is the number of free electrons present on each carbon atom in graphite?
The chemical formula of zeolite is