List of top Chemistry Questions asked in AP EAPCET

The number of \(\sigma\)-bonds, \(\pi\)-bonds and lone pairs of electrons present in the product C respectively are \[ C_2H_5NO_2 \xrightarrow{Sn/HCl} A \xrightarrow[\text{Heat}]{CHCl_3+KOH} B \xrightarrow{H_2O} C \]

When vapours of alcohol X are passed over heated copper at \(573\ K\), it gives an alkene. What is X?

Identify the product \(Z\) formed in the given sequence of reactions

In addition to \(-NH_2\) and \(-COOH\) groups, the functional group present in the amino acid serine is X and the functional group present in the amino acid cysteine is Y. X and Y are respectively

Identify the product Y in the following reaction sequence \[ C_2H_4 \xrightarrow[(ii)\ AgCN]{(i)\ HBr} X \xrightarrow[\text{Catalyst}]{H_2} Y \]

Among the following, identify the compound which will form resonance stabilized carbocations after the leaving group is lost.

Compounds: I, II, III, IV

What is Y in the given sequence of reactions?

Identify the pair of ions which act as good reducing agents.

Consider the following statements about sulphur allotropes and identify the incorrect statement.

Consider the following statements regarding the hydrolysis of \(XeF_4\): I. It is a disproportionation reaction II. Xe and \(XeO_3\) are formed in 2:1 molar ratio III. \(O_2\) gas is evolved in this reaction Choose the correct statements.

Which of the following has maximum number of electrons in \(t_{2g}\) orbitals?

Identify the polymer X formed from the monomers Y and Z.

In which of the following sets, the alloy is correctly matched with its components? I. Brass : Cu, Zn II. Bronze : Cu, Sn III. German silver : Cu, Zn, Cr Choose the correct answer.

At \(300\,K\), \(x\) moles of \(CaCl_2\) \((i=2.5;\ \text{molar mass}=111\,g\,mol^{-1})\) is dissolved in \(2.5\,L\) of water. The osmotic pressure of the resultant solution is \(0.75\,atm\). What is \(\Delta T_b\) of the solution? \[ (\text{density of water}=1\,g\,mL^{-1},\; K_b=0.52\,K\,kg\,mol^{-1},\; R=0.08\,L\,atm\,mol^{-1}K^{-1}) \]

In which of the following, colloidal system is correctly matched with its example?

Observe the following cell \[ M(s)\;|\;M^{2+}(xM)\;||\;H^+(0.02M)\;|\;H_2(g,1\,bar)\;,\;Pt(s) \] What is the value of \(x\)? Given: \[ \frac{2.303RT}{F}=0.06V \] \[ E^\circ_{M^{2+}|M}=-0.14V \] \[ E^\circ_{H^+|H_2}=0.0V \] \[ E_{cell}=0.077V \] \[ \log 4=0.602 \] \[ \text{antilog}(2.7)=0.05,\qquad \text{antilog}(2.60)=0.04 \]

At \(1130\,K\), the decomposition of ammonia on Pt catalyst follows zero order kinetics. The rate of this reaction at \(t=10\) min is \(x\ mol\,L^{-1}\,min^{-1}\). What will be its rate (in \(mol\,L^{-1}\,min^{-1}\)) at \(t=20\) min, at the same temperature?

Observe the following statements: I. Micelles have both lyophilic and lyophobic parts II. Starch in water is an example for multimolecular colloid III. The CMC of a soap is \(10^{-3}\,\text{mol L}^{-1}\). It can form a micelle when its concentration is less than \(10^{-3}\,\text{mol L}^{-1}\) IV. Gold sol can be prepared by Bredig's Arc method Choose the correct statements.

The \(\Lambda_m\) (on y-axis) of \(NaCl\) and \(CsCl\) was plotted against \(\sqrt{c}\) \((c=\text{concentration on x-axis})\). Identify the correct figure for these electrolytes. \[ \Lambda_m=\Lambda_m^\circ-K\sqrt{c} \] Given: \[ \lambda^\circ_{Na^+}=50\; S\,cm^2\,mol^{-1} \] \[ \lambda^\circ_{Cs^+}=77\; S\,cm^2\,mol^{-1} \]

Correct statements about oxidising smog are I. \[ \text{Primary precursors of it are } O_3,\ PAN \] II. It occurs in warm, dry and sunny climate III. Its formation can be controlled by the use of catalytic converters in automobiles

\(X\), \(Y\) and \(Z\) are three allotropes of carbon. They are used in black ink, in water filters and as reducing agent in metallurgy respectively. The correct statement about their production is

From the following list, identify the number of substituents which exert \(+R\) effect when present on benzene ring \[ -Cl,\quad -COCH_3,\quad -NHC_2H_5,\quad -OCH_3,\quad -NHCOCH_3,\quad -COOCH_3 \]

An alkyne \(X\) \((C_4H_6)\) does not form sodium alkynide. Reaction of \(X\) with HBr gave \(Y\). Another reaction of \(X\) with \(Na/\text{liq. }NH_3\) gave \(Z\). Identify \(Y\) and \(Z\).

A compound is formed by \(A\) (cations), \(B\) (cations) and \(O\) (anions). Atoms of \(O\) form a ccp lattice. Atoms of \(A\) occupy \(50\%\) of octahedral voids and atoms of \(B\) occupy \(25\%\) of tetrahedral voids. What is the molecular formula of the compound?