List of top Chemistry Questions

What is the role of bithional in toilet soaps?
$\Delta G^{\circ}$ versus $T$ plot in the Ellingham's diagram slopes downward for the reaction
Among the metals $Fe , Zn , Pb , Ag$ and $Pt$, which do not give a metal nitrate on treatment with concentrated $HNO _{3}$ ?
Arrange the given set of compounds in order of increasing boiling points. I. $1$-chloropropane II. Iso-propyl chloride III. $1$-chlorobutane
The shapes of $ SF_{4} $ and $ XeF_{2} $ respectively are
The order of reactivity of halides towards $S_N1$ mechanism is
Which of the following is an amorphous solid?
Which of the following is not an artificial sweetener?
Which one of the following compounds shows cis-trans isomerism?
Which of the following formulae is mismatched?
What is the percentage of free space in $fcc$ and $bcc$?
Tincture of iodine is
The yellow colour in $NaCl$ crystals is due to
The standard electrode potential for Daniell cell is $1.1\, volt$. What is the standard Gibbs energy for the reaction?
The species $ {Ar, K^+}$ and $ {Ca^{2+}}$ contain the same number of electrons. In which order do their radii increase?
The polymer obtained by the interaction of ethylene glycol and terephthalic acid is
The heat of combustion of carbon to $ {CO_2}$ is $ {- 393.5 \, kJ/mol}$. The heat released upon formation of 35.2 g of $ {CO_2}$ from carbon and oxygen gas is:
The function of "Sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of the pump?
The equilibrium constant for the equilibrium $PCl _{5}(g) \rightleftharpoons PCl _{3}(g)+ Cl _{2}(g)$ at a particular temperature is $2 \times 10^{-2}\, mol L ^{-1}$. The number of moles of $PCl _{5}$ that must be taken in a one litre flask at the same temperature to obtain a concentration of $0.20$ mole of chlorine at equilibrium is
The domestic sewage in large cities
The degeneracy of hydrogen atom that has energy equal to $\frac{-R_{ H }}{9}$ is (where $R_{ H }=$ Rydberg constant)
The antibiotics have no effect on viruses because
Photochemical smog always contains
Number of possible isomers for the complex $ {[Co(en)_2Cl_2] Cl}$ will be : (en = ethylenediamine)
Number of possible alkynes with formula $C_5H_8$ is