List of top Chemistry Questions

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
Identify the major product from the following reaction sequence.
major product from the following reaction sequence.
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 ?
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 $\Delta_{mix}V = 0$?}
Aluminium chloride in acidified aqueous solution gives a complex ion 'X'. The hybridization of central atom in X is
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
Hydration enthalpy of which of the following ions is highest?
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$_6$
Identify the correct statements from the following. (i). For adiabatic process, $\Delta U = W_{adiabatic$} (ii). Work is a path function. (iii). Volume is an extensive property.
Match the following List - I (Type of reaction) \quad List - II (unbalanced equation) A Combination reaction \quad i) AgNO$_3$ + CaCl$_2$ $\rightarrow$ AgCl + Ca(NO$_3$)$_2$ B Decomposition reaction \quad ii) Cl$_2$ $\rightarrow$ Cl$^-$ + ClO$_3^-$ C Disproportionation reaction \quad iii) Mg + N$_2$ $\rightarrow$ Mg$_3$N$_2$ D Displacement reaction \quad iv) KClO$_3$ $\xrightarrow{\Delta$ KCl + O$_2$}
If the total electricity required to deposit 1 mole of a metal M is equal to that of 10.7 amperes of current for 10 hours. The equivalent weight of the metal is (atomic weight = M u)
20 mL of gas A and 10 mL of gas B diffuses through a porous membrane separately in 1 minute. If the vapor density of B is X, what is the vapor density of A?
The general formula of the compound formed when a metal (M) of group - 1 reacts with non metal (x) of group - 16 is
Arrange the following species in the decreasing order of their bond orders. NO \quad NO$^+$ \quad NO$^-$ (I) \quad (II) \quad (III)
In which of the following, elements are correctly arranged in the decreasing order of their second ionization enthalpies.
Identify the element which has highest second ionization enthalpy
Given below are half-cell reactions:
\(MnO_4^- + 8H^+ + 5e^- → Mn^{2+} + 4H_2O\),
\(E°_{(Mn^{+2}/MnO_4^-)} = –1.510 V\)
\((\frac{1}{2})O_2 + 2H^+ + 2e^- → H_2O,\)
\(E°(O_2/H_2O) = +1.223 V\)
Will the permanganate ion, \(MnO_4^-\) liberate \(O_2\) from water in the presence of an acid?