List of top Chemistry Questions asked in AP EAPCET

Which of the following processes represents the extraction of pure metal from its ore?
Which of the following coordination compounds exhibits optical isomerism?
Given below are two statements: Statement I: Sucrose consists of \(\alpha\)-D-glucose and \(\beta\)-D-fructose units. Statement II: Lactose consists of \(\beta\)-D-galactose and \(\beta\)-D-glucose units.
Histamine is responsible for various physiological effects. Which of the following statements are correct?

• [(I)] Histamine is a potent vasodilator.

• [(II)] Histamine lowers blood pressure by constricting blood vessels.

• [(III)] Histamine is responsible for nasal congestion associated with common cold and allergies.
Toluene undergoes bromination in presence of iron followed by treatment with sodium in dry ether. The major product formed is \[ C_6H_5CH_3 \xrightarrow{Br_2/Fe} X \xrightarrow{2Na,\ dry\ ether} Y \]
Among the following amines, the one which will give carbylamine test is
Given below are two statements: Statement I: The formation of \([O_2]^+[PtF_6]^-\) is the basis for the formation of xenon fluorides. Statement II: \(O_2\) and Xe have almost the same first ionization enthalpies.
A transition metal ion \(X^{3+}\) has a magnetic moment of \(\sqrt{15}\) BM. The atomic number of the metal \(X\) is
The number of complexes among the following having exactly four unpaired electrons is \[ [Cr(H_2O)_6]^{2+}, \; [Mn(H_2O)_6]^{2+}, \; [Fe(H_2O)_6]^{2+}, \; [Co(H_2O)_6]^{3+}, \] \[ [Cu(H_2O)_6]^{2+}, \; [CoF_6]^{3-}, \; [Cr(CN)_6]^{4-}, \; [MnCl_4]^{2-} \]
Non-stick cookware is coated with Teflon and unbreakable crockery is made up of melamine-formaldehyde resin. The correct classification of these polymers respectively is
The emf values of three galvanic cells I, II and III are \(E_1\), \(E_2\) and \(E_3\) respectively. Determine the correct order among them. \[ \text{(I)}\quad Zn|Zn^{2+}(1M)||Cu^{2+}(0.1M)|Cu \] \[ \text{(II)}\quad Zn|Zn^{2+}(1M)||Cu^{2+}(1M)|Cu \] \[ \text{(III)}\quad Zn|Zn^{2+}(0.1M)||Cu^{2+}(1M)|Cu \]
Which halogen oxide is used in the estimation of carbon monoxide?
Given below are two statements: Statement I: Animal skin is positively charged and tannin is negatively charged. Statement II: In leather tanning, chromium salts are used in place of tannin.
Match List-I with List-II.
Consider the following steps involved in the extraction of Aluminium. What is \(Z\)? \[ \text{Bauxite} \xrightarrow[\;523K\;]{\text{Hot conc. NaOH}} X(aq) \xrightarrow[\;CO_2\;]{} Y \xrightarrow[\;1473K\;]{} Z \xrightarrow[\;\text{electrolysis}\;]{} Al \]
The value of the rate constant for the reaction \(A \rightarrow \text{products}\) is \(5 \times 10^{-5}\ \mathrm{s^{-1}}\) at \(300\ \mathrm{K}\). Its activation energy is \(50\ \mathrm{kJ\ mol^{-1}}\). At temperature \(T\), the rate constant becomes \(1.0 \times 10^{-4}\ \mathrm{s^{-1}}\). What is the value of \(T\) (in K)? \[ \text{Given: } R = 8.3\ \mathrm{J\ mol^{-1}\ K^{-1}}, \qquad \log 2 = 0.3 \]
The boiling point of 1M aqueous solution of KCl (85% dissociation) having density \(1.04\ \text{g mL}^{-1}\) is \[ \text{(Given: } K_b(\mathrm{H_2O}) = 0.52\ \mathrm{K\ kg\ mol^{-1}}, \quad \text{Molar mass of KCl} = 74.5\ \mathrm{g\ mol^{-1}} \text{)} \]
The IUPAC name of the complex [Pt(NH$_{3}$)$_{2}$Cl(NO$_{2}$)] is:
The reaction of H$_2$O$_2$ with KIO$_4$ in an alkaline medium gives:
Which of the following transition metal complexes is expected to be diamagnetic?
Which of the following statements are correct about a dry cell?

• [(I)] It is also known as Leclanche cell.

• [(II)] Electrolyte is a moist paste of \(NH_4Cl\) and \(ZnCl_2\).

• [(III)] Reaction at cathode is \[ MnO_2 + NH_4^+ + e^- \rightarrow MnO(OH) + NH_3 \]

• [(IV)] It can be charged.
Which of the following elements has the highest first ionization enthalpy?
The number of lone pairs on the central atom in ( SF_4 ), ( XeF_4 ), ( CF_4 ), and ( BF_3 ) are respectively:
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 \(K_{sp} = 9 \times 10^{-6}\).
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: