List of top Questions asked in AP EAPCET- 2026

Which of the following is not an example of an antibiotic?

White phosphorus reacts with sulphuryl chloride and forms a solid substance A and a gas D. When A is heated at high temperature, it decomposes to give a colorless oily liquid 'X' and a gas C. The shape of X is:

The following graph is obtained for the adsorption of a gas on a metal surface at 300K. What is the value of $x/m$ when the pressure of gas is 2 bar?

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

Chlorine reacts separately with cold, dilute NaOH and hot, concentrated NaOH. Which of the following statements regarding these reactions is not correct?

The following equation is obtained for a first order reaction: $\log k = 14 - \frac{1.25 \times 10^4 K}{T}$. The $E_a$ (in kJ $mol^{-1}$) and frequency factor A (in $s^{-1}$) of the reaction are respectively:

Match the following:
figure [H]

figure

A solid solute is dissolved in water. The mole fraction of solute is 0.02. What is the molality of the solution?

Observe the following reaction: $2N_2O_5(g) \rightarrow 4NO_2(g) + O_2(g)$. At T(K), the concentration of $N_2O_5(g)$ changed from 2 mol $L^{-1}$ to 1.5 mol $L^{-1}$ in 100 min. What is the average rate (in mol $L^{-1} min^{-1}$) of this reaction?

What are X and Y in the following reaction sequence? $Ethanal \rightarrow C_4H_8 \xrightarrow{Br_2/CCl_4} X \xrightarrow{alc. KOH, NaNH_2} Y$

Metals A and B crystallize in "simple cubic" and "face centered cubic" lattice respectively. The number of metal atoms A and B per unit cell are respectively:

A and B are two position isomers of an alkene $C_5H_{10}$. Both A and B do not exhibit cis-trans isomerism. Addition of HBr with A forms X (major product) and B adds HBr to form Y (major product). What are X and Y respectively?

The following reaction takes place in a cell at 298 K: $2M^{3+}(aq) + 2I^{-}(aq) \rightarrow 2M^{2+}(aq) + I_2(s)$. What is the value of $\log K_c$ for this reaction? (Given: $E_{cell}^\circ = 0.235 V, F = 96500 C mol^{-1}, R = 8.3 J mol^{-1} K^{-1}$)

1 mL of 30 % (w/V) $H_2O_2$ solution at STP gives 100 mL of oxygen gas. The volume strength of $H_2O_2$ (in V) is:

Identify the pairs in which chemical substance is correctly matched with its use: (I) Liquid $CO_2$ - As solvent in dry cleaning, (II) $NaClO_3$ - herbicide, (III) $H_2O_2$ - bleaching agent.

Identify the incorrect statement from the following:

Statement I: The groups $NHCOCH_3$ and $-OCOCH_3$ deactivate the benzene ring for electrophilic attack. Statement II: -OH and $-CH_2CH_3$ groups activate the benzene ring for electrophilic attack.

Which of the following is not correctly matched with respect to the nature of oxides?

Which of the following orders are not correct regarding first ionisation enthalpy of the given elements (I: B>Al, II: Al>Ga, III: Ga>In, IV: In>Tl)?

In a tube, a liquid is flowing as shown in the diagram. The correct order of the velocity (u) of liquid flowing in this tube is: figure [H]

figure

At T(K) the $K_c$ for the reactions (I) and (II) are $2.4 \times 10^{30}$ and 1.4 respectively. What is the $K_c$ value for: $\frac{1}{2}N_2(g) + \frac{1}{2}O_2(g) + \frac{1}{2}Br_2(g) \rightleftharpoons NOBr(g)$?

The pH of a 0.1 M solution of a weak monobasic organic acid is 4.0. What is the dissociation constant of the acid?

What is $\Delta_r H^\ominus$ (in kJ mol$^{-1}$) for the following reaction at 298 K? $C_3H_8(g) + 5O_2(g) \rightarrow 3CO_2(g) + 4H_2O(l)$ (Given: $\Delta_f H^\ominus$ of $C_3H_8(g)$, $CO_2(g)$ and $H_2O(l)$ is -104, -393 and -285 kJ mol$^{-1}$ respectively)

Consider the following reaction: $A(g) + B(g) \rightleftharpoons C(g) + D(g)$. Which one of the following is zero for this reaction at 298 K?

One mole of $O_2$ (g) was passed over hot coke. At the end of the reaction, 40 % of $O_2$ (g) was unreacted. What is the volume (in L) of reaction mixture at STP (273.15 K and 1 bar)? (Assume only CO (g) is formed in the reaction)