List of top Chemistry Questions

The density of Na is 0.613 g cm$^{-3}$. If the edge length of unit cell of Na is 5\AA, the effective number of atoms of Na per unit cell is (Atomic weight of Na = 23 u)}
The standard Gibbs energy ($\Delta G^\ominus$) for the following reaction is A(s) + B$^{2+}$ (aq) $\rightleftharpoons$ A$^{2+}$ (aq) + B(s), K$_c$=10$^{12}$ at 25$^\circ$C (K$_c$= equilibrium constant)

What is the concentration (in mol L$^{-1}$) of the product after 20 s in the following reaction. Given that A $\rightarrow$ 3 B , rate = k[A]$^0$ Time(s) \(\quad\) Concentration of the reactant (mol L$^{-1}$) 0 \(\quad\) \(\quad \quad \quad 0.1 15 \quad \quad \quad \quad 0.05 20 \quad \quad \quad \quad 0.1-x\)

Arrange the following oxides in correct order of their acidic character. N$_2$O$_5$, P$_2$O$_5$, N$_2$O$_3$, As$_2$O$_3$
The hybridization of metals involved in the following complexes, respectively are [Mn(CN)$_6$]$^{3-}$, [CoF$_6$]$^{3-}$
Hydrolysis of nucleic acid gives nitrogenous base sugar and ________
The product formed in the given reaction is Phenylmagnesium bromide (C$_6$H$_5$-MgBr) reacting with D$_2$O, leading to product ?.
Hydrolysis of the minor product formed from the reaction of 1-Bromo propane and ethanolic KCN given
With reference to the carbonyl group which statement(s) is/are correct? a) Carbonyl Carbon is electrophilic b) Carbonyl Carbon is nucleophilic c) Carbonyl Oxygen is electrophilic d) Carbonyl Oxygen is nucleophilic
Sugar present in DNA is
The rate of reaction of t-butyl bromide and NaOH in water depends on the concentration of
Which of the following reactions takes places when tertiary butanol passed over heated copper at 573 K ?
Identify the major product from the following reaction sequence.
major product from the following reaction sequence.
The no. of positively and negatively charged sols respectively in the following are TiO$_2$, blood, CdS, Cu, Ag, Clay, SiO$_2$, Fe$_2$O$_3$
Which of the following represents correct order of oxidizing power of halogens with water
Freundlich adsorption isotherm fails at which of the following condition?
Which of the following elements are not regarded as transition elements?
The decreasing order of acidic nature of the following compounds is
decreasing order of acidic nature of the following compounds
Ag crystallizes in fcc lattice. What is the total number of tetrahedral voids present in 540 g of Ag metal? (N$_A$ = Avagadro number, Ag atomic weight = 108 g mol$^{-1}$)
3.1 g of a compound, 'X' (molar mass = 62 g mol$^{-1}$) is dissolved in 19.5 g of other compound, Y (molar mass = 78 g mol$^{-1}$). The ratio of mole fractions of X and Y in the solution is
For which of the following liquid mixtures $\Delta_{mixH = 0$ and $\Delta_{mix}V = 0$?}
Hydration enthalpy of which of the following ions is highest?
Identify the correct statements from the following: (a) Alkali metals are strong reducing agents. (b) KO$_2$ is a diamagnetic oxide. (c) Lithium chloride exists as LiCl . 2H$_2$O
Aluminium chloride in acidified aqueous solution gives a complex ion 'X'. The hybridization of central atom in X is
Match the following: List - I \quad (Type of hydride) \quad List - II \quad (Example) A) Electron precise \quad i) SiH$_4$ B) Saline \quad ii) H$_2$O C) Electron deficient \quad iii) MgH$_2$ D) Electron rich \quad iv) B$_2$H$_6$