List of top Chemistry Questions

Which molecular formula is also an empirical formula?
A man straightens up his room. His action does not violate the second law of thermodynamics because
An imaginary metal crystallises in a cubic lattice. The unit cell edge length is 100 pm, (1 pm = $10^{-12}$ m). The density of this metal is 200 g/cm\(^3\). The atomic mass of the metal is 60.2 g/mol. How many of these metal atoms are there within a unit cell?
Which of the following would be the most soluble in water?
The shortest bond would be present in which of the following substances?
Which of the following does not show hydrogen bonding?
The product formed by the condensation reaction of alcohols is
A buffer is formed by adding 500 ml of 0.20 M correct to 500 mL of 0.10 M NaC H$_2$O$_2$. What would be the maximum amount of HCl that could be added to this solution without exceeding the capacity of the buffer?
Which of the following is true for an acid-base concentration cell such as the one used by the pH meter?
A compound 'A'with molecular formula \({C_5H_{10}O}\)gives a positive \({2,4-DNP}\) test but a negative Tollen's test. On treatment with sodium hypochlorite, it gives \({CHCl_3}\) and compound 'B'. Compound 'B' is
$CH _{3} C \equiv CCH _{3} \xrightarrow{H 2 / P t} A \xrightarrow{D_{2} / P t} B$ The compounds $A$ and $B$, respectively are
$CO$ is a stronger ligand than $Cl^-$ because
The sulphur compound in which the sulphur atom has octet configuration in its valence shell among the following is
The degree of dissociation of $P C l_{5}(\alpha)$ obeying the equilibrium $PCl _{5} \rightleftharpoons PCl _{3}+ Cl _{2}$ is related to the equilibrium pressure by
The average kinetic energy of an ideal gas per molecule in SI unit at $25^{\circ} C$ will be
Which of the following compound has all the four types $\left(1^{\circ}, 2^{\circ}, 3^{\circ}\right.$ and $\left.4^{\circ}\right)$ of carbon atoms?
The normality of $26\%$ (wt/vol) solution of ammonia (density $= 0.855$ ) is approximately :
$1.25\, g$ of a sample of $Na _{2} CO _{3}$ and $Na _{2} SO _{4}$ is dissolved in $250\, ml$ solution. $25 ml$ of this solution neutralises $20\, ml$ of $0.1\, N\, H _{2} SO _{4}$. The $\%$ of $Na _{2} CO _{3}$ in this sample is
Formation of polyethylene from calcium carbide takes place as follows $ CaC _{2}+2 H _{2} O \longrightarrow Ca ( OH )_{2}+ C _{2} H _{2}$ $C _{2} H _{2}+ H _{2} \longrightarrow C _{2} H _{4} $ $ nC _{2} H _{4} \longrightarrow\left(- CH _{2}- CH _{2}-\right) n$ The amount of polyethylene obtained from $64.1\, kg$ of $CaC _{2}$ is
Which of the followings forms the base of talcum powder?
Give the possible structure of $X$ in the following reaction : $C_6 H_6 + D_2 SO_4 \xrightarrow{D_2O} X$
Nucleotides are joined together by between $ 5' $ and $ 3' $ carbon atoms of pentose sugar
What will happen when $D-(+)$-glucose is treated with methanolic �$HCl$ followed by Tollens� reagent ?
At what temperature, the rate of effusion of $N_2$ would be $1.625$ times than that of $SO_2$ at $50^{\circ} C$ ?
A compound of Xe and F is found to have 53.5% of Xe. What is oxidation number of Xe in this compound ?