List of top Chemistry Questions asked in AP EAPCET

Which of the following species has an unpaired electron?

Which of the following molecules is not linear?

The standard molar enthalpy of vaporisation ($\Delta_{vap}H^\ominus$) of A, B and C liquids is 23.3, 41 and 29 kJ mol$^{-1}$ respectively. The correct order of dipole-dipole attractive forces in these liquids is

At 25$^\circ$C, the solubility product of MCl is $1 \times 10^{-10}$. What is its molar solubility in 0.1 M NaCl solution at same temperature?

The solubility products of NiS, ZnS, CdS and HgS are $4.7 \times 10^{-1}$, $1.6 \times 10^{-24}$, $8 \times 10^{-27}$ and $4 \times 10^{-53}$ respectively. An aqueous solution contains Ni$^{2+}$, Zn$^{2+}$, Cd$^{2+}$, and Hg$^{2+}$ of equal concentration. H$_2$S gas was passed into this solution very slowly. The first and the last ions that precipitate as sulphides are respectively

Bond enthalpy of Ge-Ge bond is 260 kJ mol$^{-1}$. The bond enthalpies of Si-Si and Sn-Sn bonds in kJ mol$^{-1}$ are respectively.

Identify the molecules which have sp- hybridized carbon(s) from the list given under. I. Ethane nitrile $\quad$ II. Buta-1, 3-diene $\quad$ III. Propa-1, 2-diene, IV. Ethyne $\quad$ V. Benzene

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 $\quad$ $\quad \quad \quad 0.1 15 \quad \quad \quad \quad 0.05 20 \quad \quad \quad \quad 0.1-x$