List of top Chemistry Questions asked in AP EAPCET

The minimum volume of water (in L) required to dissolve 1.5 g of \(CaSO_{4}\) (molar mass = 136 g mol\(^{-1}\)) at 298 K is given that \(K_{sp} = 9 \times 10^{-6}\).
Which of the following statements are correct regarding methods used to remove hardness of water? I. Temporary hardness due to Ca and Mg bicarbonates can be removed by boiling. II. In Clark's process, lime is used to precipitate calcium carbonate. III. Calgon softens water by forming soluble complexes with Ca$^{2+}$ and Mg$^{2+}$.
X, Y, Z are calcium compounds. X is a primary raw material for manufacturing cement. Y is used to recover ammonia in Solvay process and Z is employed for making casts of statues. Identify the incorrect statement from the following:
At a given temperature T in a 10.0 L flask, 2.0 moles of N$_2$O$_4$(g) is heated. At equilibrium, 20% of N$_2$O$_4$(g) dissociates into NO$_2$(g). The value of K$_C$ for the reaction N$_2$O$_4$(g) $\rightleftharpoons$ 2NO$_2$(g) is:
If the molar masses of Na$_2$S$_2$O$_3$ and I$_2$ are M$_1$ and M$_2$ respectively, then the equivalent weights of Na$_2$S$_2$O$_3$ and I$_2$ in the reaction: \[ 2\,\text{Na}_2\text{S}_2\text{O}_3 + I_2 \rightarrow 2\,\text{NaI} + \text{Na}_2\text{S}_4\text{O}_6 \] are respectively:
For the reaction, \(2Al_{2}O_{3}(s) \rightarrow 4Al(s) + 3O_{2}(g)\), \(\Delta H = +3340\,\text{kJ}\). What is the enthalpy of formation of \(Al_{2}O_{3}(s)\) (in kJ)?
An ideal gas with density (3.0 g L^-1) has a pressure of (684 mm Hg) at (25^C). The rms speed (in m s^-1) of the gas is (1 atm = 10^5 Pa).
At 27^C, 1.6 g of O$_2$ gas at 5 atm expands isothermally against a constant external pressure of 1 atm. The work done (in J) is (1 L-atm = 100 J):
Correct increasing order of first ionization enthalpy is: C, O, N, F
Volume of 4.4 g CO$_2$ at STP is:
Which species has bond order 2.5 and is paramagnetic?
Which quantum number combination is impossible for a hydrogenic atom orbital?
What are X and Y respectively in the following sequence of reactions?
The product Z of the given reaction sequence is: \(C_2H_4 \xrightarrow[(ii)\ KMnO_4/H^+]{(i)\ H_2O/H^+} X \xrightarrow{SOCl_2} Y \xrightarrow{(C_2H_5)_2Cd} Z\)
Which of the following does not form benzoic acid on oxidation with alkaline \(KMnO_4\) followed by acidification?
Which one of the following is not correct?
Consider the following organic halides:
(I) Bromobenzene,
(II) 2-Bromopropane,
(III) 1-Bromopropane.
The correct order of reactivity towards \(S_N2\) reaction is:
The number of \(\alpha\)-hydrogens present in the major product (X) in the given reaction is:
(Reaction: Alkyl halide + alc. KOH \(\rightarrow\) X)
What are A and C in the following sequence of reactions? \(C_2H_2 \xrightarrow{A} B \xrightarrow{\text{polymerisation}} C\)
The antibiotic which is supposed to be toxic towards certain strains of cancer cells is:
Observe the following reactions: I. D-Glucose \(\xrightarrow{NH_2OH}\) II. D-Glucose \(\xrightarrow[(ii) NH_2OH]{(i) (CH_3CO)_2O}\). Correct statement regarding the reactions I and II is:
Which of the following colloidal system represents a gel?
Which of the following reactions is non-spontaneous?
The fusion of chromite ore with \(Na_2CO_3\) in free access of air leads to the formation of yellow coloured solution of compound A and residue B along with the evolution of \(CO_2\) gas. Identify the correct statements regarding A and B.
I. A contains Cr-O-Cr linkage
II. B is \(Fe_2O_3\)
III. Oxidation state of chromium in A is +6
Which anion of the simple salt can be confirmed by Brown ring test?