List of top Chemistry Questions asked in AP EAPCET

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

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

The reaction between \(X\) and \(Y\) produces a solid substance and a mixture of two gases, one of which is a colourless toxic gas. \(X\) and \(Y\) respectively are

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: \[ \frac{2.303RT}{F}=0.06V \] \[ E^\circ_{M^{2+}|M}=-0.14V \] \[ E^\circ_{H^+|H_2}=0.0V \] \[ E_{cell}=0.077V \] \[ \log 4=0.602 \] \[ \text{antilog}(2.7)=0.05,\qquad \text{antilog}(2.60)=0.04 \]

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 \(Z\).

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

At \(298\,K\), for the reaction \[ N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g) \] \[ \Delta H=-92.4\ \text{kJ} \] and \[ \log K_c=5.75. \] What is the entropy change \((\Delta S)\) (in J K\(^{-1}\)) for this reaction at the same temperature? \[ (R=8.3\ \text{J K}^{-1}\text{mol}^{-1}) \]

Identify the end product \(Z\) in the given sequence of reactions \[ C_3H_6 \xrightarrow[\left(C_6H_5COO\right)_2]{HBr} X \] \[ X \xrightarrow[\text{Anhy. }AlCl_3]{C_6H_6} Y \] \[ Y \xrightarrow[(iii)\ NaOH/CaO,\Delta]{(i)\ KMnO_4/OH^- \;\; (ii)\ H_3O^+} Z \]

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

Identify the sets in which both the metals react with water? \[ \text{I.}\quad Be,\ Mg \] \[ \text{II.}\quad Li,\ Mg \] \[ \text{III.}\quad Na,\ K \] \[ \text{IV.}\quad K,\ Ca \]

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

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.

The number of radial nodes possible for \(3p\)-orbital is \(x\) and the number of angular nodes possible for \(4d\)-orbital is \(y\). What is \(x:y\)?

Which of the following radical initiates the chain reaction responsible for depletion of ozone layer?

From the following, identify the set in which polymer is correctly matched with its type:

The spin only magnetic moment of the element having highest third ionization enthalpy among Ti, V, Cr, Mn and Fe in its \(+3\) state is (BM):

At 300 K, one mole of a gas present in a 10 L flask exerted a pressure of 2.71 atm. What is its compressibility factor? \((R=0.082~L~atm~mol^{-1}K^{-1})\)

In graphite, the C-C bond length within the layer is X pm and the distance between two adjacent layers is Y pm. X and Y respectively are:

Identify the chiral molecules from the following.

The de Broglie wavelength of a particle of mass $m$ moving with a velocity $v$ is given by

The elements with atomic numbers 9, 17, 35, 53 belong to the family of

At T(K), a gas is adsorbed on the surface of a solid. The signs of $\Delta H$ and $\Delta S$ are respectively:

The reaction of an aldehyde with Tollens' reagent gives