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 \(K_{sp} = 9 \times 10^{-6}\).

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:

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).

Which quantum number combination is impossible for a hydrogenic atom orbital?

Which species has bond order 2.5 and is paramagnetic?

What are X and Y respectively in the following set of reactions? (R--Br + \(CH_{3}CH_{2}O^-\) \(\rightarrow\) X; R--Br + \((CH_{3})_{3}CO^-\) \(\rightarrow\) Y)

Ethanal \(\xrightarrow{i. (CH_3)_2CHMgBr,\ ii.\ H_2O}\) X;
Propanone \(\xrightarrow{i.\ C_2H_5MgBr,\ ii.\ H_2O}\) Y.
Consider statements: I. Ease of dehydration \(Y>X\); II. Acidic character \(X>Y\); III. Reactivity towards Lucas reagent \(X>Y\). I. Ease of dehydration is Y > X
II. Acidic character is X > Y
III. Reactivity towards Lucas reagent is X > Y

Which of the following are the correct statements about D-glucose? flalign* I. & It forms oxime with hydroxyl amine &
II. & It forms addition product with NaHSO_3 &
III. & It forms cyanohydrin with HCN &
IV. & It forms saccharic acid with bromine water & flalign*

In which of the following given sets, complexes are correctly arranged in the increasing order of their spin only magnetic moment values? align* I. & [Fe(CN)_6]^4- < [Fe(CN)_6]^3- < [Fe(H_2O)_6]^3+
II. & [Co(NH_3)_6]^3+ < [Ni(H_2O)_6]^2+ < [Cr(H_2O)_6]^3+
III. & [V(H_2O)_6]^3+ < [Cr(CN)_6]^3- < [Fe(H_2O)_6]^2+ align*

Which of the following is most effective towards coagulation of CdS sol?

What mass (in g) of glycerol is required to produce the same anti-freezing effect in 1.0 L of water as that of 20 g of NaCl in 1.0 L of water? (molar mass of glycerol = 92 g mol\(^{-1}\), assume NaCl is 97% dissociated)

The structure of \(Al_{2}Cl_{6}\) is given below. The correct order of bond angles X, Y and Z is

In which of the following sets, molecules are correctly arranged in the decreasing order of covalent character? I. \( \text{AlCl}_{3} > \text{MgCl}_{2} > \text{NaCl} \) II. \( \text{BeCl}_{2} > \text{MgCl}_{2} > \text{CaCl}_{2} \) III. \( \text{CaI}_{2} > \text{CaBr}_{2} > \text{CaCl}_{2} \)

Wavelength of a particular line in Balmer series of atomic spectrum of hydrogen is 656.4 nm. What is the wavelength (in nm) of corresponding line in the spectrum of $He^{+1}$?

The correct order of their acidic strength for the given compounds is:

Artificial sweetener with glycosidic linkage is X. Another one with dipeptide and ester linkage is Y. Correct statement regarding X and Y is:

Formation of micelles takes place only above a particular temperature. This temperature is known as:

Which of the following pairs of ions are not paramagnetic in nature? (Atomic Number: $La=57$, $Ce=58$, $Eu=63$, $Gd=64$, $Tb=65$, $Yb=70$, $Lu=71$)

Consider the following carbocations: (I) $(CH_3)_2CH-CH_2^+$, (II) $CH_2=CH-C^+H-CH_3$, (III) $(CH_3)_2CH-C^+H-CH_3$. The correct order of stabilities of these is:

At T(K), 0.004 M $Na_2SO_4$ solution is isotonic with 0.01 M glucose solution. The degree of dissociation of $Na_2SO_4$ is:

Which of the following point defects are shown by AgBr crystals? I. Metal excess defect, II. Schottky defect, III. Metal deficiency defect, IV. Frenkel defect

Borax $+ H_2O \rightarrow A + B$. What are A and B respectively?

0.42 g of an organic compound containing C, H and O gave on combustion 0.942 g of $CO_2$ and 0.231 g of $H_2O$. The empirical formula weight of the compound is (At.wt: $C=12$ u, $H=1$ u, $O=16$ u)

One mole of $A(g)$ was taken in a 1L closed flask and heated to T(K). At equilibrium, the concentration of $A(g)$ is equal to four times the equilibrium concentration of $B(g)$. What is $K_c$ for $A(g) \rightleftharpoons B(g) + C(g)$?

Which of the following set of quantum numbers represent the electron with highest energy?