List of top Chemistry Questions

The alloy of copper that contains zinc is
In which of the following compounds, carbon exhibits a valency of $4$ but oxidation state $-2$ ?
In zinc blende structure, the coordination number of the cation is
Which one of the following amines cannot be prepared by Gabriel's synthesis?
When a solution containing non-volatile solute is diluted with water
Which of the following compound is chiral?
The van't Hoff factor $i$ for a dilute aqueous solution of sucrose is
Which of the following is a correct name according to IUPAC rules?
Which of the following is the largest is size?
The $S.I$ unit of activity of a radioactive sample is
Phenol on heating with alcoholic $KOH$ and chloroform - undergoes
The best coagulant for the precipitation of $Fe ( OH )_{3}$ is
Freundlich adsorption isotherm equation is
The correct order of reducing character of alkali metals is
Zeigler-Natta catalyst is used to prepare
Two oxides of a metal contain $36.4 \%$ and $53.4 \%$ of oxygen by mass respectively. If the formula of the first oxide is $M _{2} O$, then that of the second is
The standard enthalpy of formation of $C_2H_{4(g)}, CO_{2(g)}$ and $H_2O_{(l)}$ are $52, -394$ and $-286\, kJ\, mol^{-1}$ respectively. Then the amount of heat evolved by burning $7\, g$ of $C_2H_{4(g)}$ is
Chemically unreactive three different gases $A, B$ and $C$ of molecular masses $16, 32$ and $64$ are enclosed in a vessel at constant temperature till equilibrium is reached. Which of the following statements is true?
When $6.3\, g$ of sodium bicarbonate are added to $30.0\, g$ of acetic acid solution, the residual solution is found to weigh $33.0\, g$. The mass of carbon dioxide released in the reaction is
According to kinetic theory of gases
According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?
A solid compound $XY$ has $NaCl$ structure. If the radius of the cation is $100\, pm$, the radius of the anion $(Y^-)$ will be -
The complex, $[Pt(Py)(NH_3)Br\,Cl]$ will have how many geometrical isomers?
Which one of the following is present as an active ingredient in bleaching powder for bleaching action?
The rms velocity of hydrogen is $\sqrt {7}$ times the rms velocity of nitrogen. If $T$ is the temperature of the gas, which of the following is true?