List of top Chemistry Questions asked in TS EAMCET

Which of the following statements are correct? I. Reaction of bromine with excess fluorine gives a T-shaped compound. II. Iodine oxides decompose on heating. III. Roasting of sulphide ores gives \(\mathrm{SO_2}\) as a byproduct. The correct answer is

\(\mathrm{XeF_4}\) on reaction with \(\mathrm{O_2F_2}\) at \(143\ \mathrm{K}\) gives a Xenon compound \(A\). On complete hydrolysis, \(A\) gives HF and \(B\). The hybridisation of the central atom in \(B\) is

At \(T\)(K), the following data is obtained for the decomposition of \(A(g)\), which follows first order kinetics \[ A(g)\rightarrow B(g)+C(g) \] \[ \begin{array}{|c|c|} \hline \text{Time (s)} & \text{Total pressure (atm)} \hline 0 & 0.5 100 & 0.6 x & 0.65 \hline \end{array} \] What is \(x\) (in s)? \[ (\log1.25=0.097,\qquad \log1.4285=0.1549) \]

The following reaction takes place in a galvanic cell at \(298\) K \[ \mathrm{Fe^{2+}(aq)+Ag^+(aq)\rightarrow Fe^{3+}(aq)+Ag(s)} \] The \(\Delta_rG^\circ\) (in kJ mol\(^{-1}\)) and \(\log K_c\) values are respectively \[ (F=96500\ \mathrm{C\,mol^{-1}},\; E^\circ_{\mathrm{Ag^+/Ag}}=0.80\ \mathrm{V},\; E^\circ_{\mathrm{Fe^{3+}/Fe^{2+}}}=0.77\ \mathrm{V},\; R=8.3\ \mathrm{J\,mol^{-1}K^{-1}}) \]

A metal crystallizes in cubic lattice with edge length of \(4\ \text{\AA}\). The number of unit cells of this metal present in \(128\ \text{cm}^3\) volume is

An alkene, \(\mathrm{C_4H_8}\) (\(X\)), on reaction with HBr gives a compound \(Y\). Hydrolysis of \(Y\) follows the \(S_\mathrm{N}1\) mechanism. The ozonolysis products of \(X\) are

Observe the following reaction sequence and the statements given about the product \(Y\)

I. Reaction of \(Y\) with \(\mathrm{Br_2/UV}\) light forms aryl bromide.
II. Reaction of \(Y\) with \(\mathrm{CrO_3/(CH_3CO)_2O}\) followed by hydrolysis gives a compound which is acidic in nature.
The correct answer is

If two liquids \(A\) and \(B\) have \[ P_A^\circ:P_B^\circ=1:2 \] and have mole fraction in solution as \(1:2\), then mole fraction of \(B\) in vapour phase is

Given below are two statements Statement-I: The solubility of \(\mathrm{CaCl_2}\) and \(\mathrm{MgCl_2}\) in water is more than that of \(\mathrm{NaCl}\). Statement-II: \(\mathrm{Ca(NO_3)_2}\) on heating gives three products. The correct answer is

Empirical formula weight of borazine is \[ (\text{At. wt: }H=1\ \text{u},\ B=10.8\ \text{u},\ N=14\ \text{u}) \]

An alkene, \(X\) \((\mathrm{C_5H_{10}})\) exhibits cis/trans isomerism. Bromination of \(X\) followed by reaction with reagent(s) \(Y\) gave the product \(Z\). What are \(Y\) and \(Z\)?

IUPAC names of the following compounds \(X\) and \(Y\) are respectively

Which of the following reactions give hydrogen gas? \[ \begin{aligned} \text{I. }&\text{Reaction of tin with steam} \text{II. }&\text{Passage of steam over hot coke} \text{III. }&\text{Passage of air over hot coke} \end{aligned} \] The correct answer is

The pH of \(0.01\) M aqueous aniline solution at \(298\) K is \(8.3\). Its degree of dissociation \((\alpha)\) is \[ (K_b\text{ of aniline}=4\times10^{-10}; \ \text{antilog}(0.7)=5.0; \ \text{antilog}(0.3)=2.0; \ \text{antilog}(0.4)=2.5) \]

What is the enthalpy change (in kJ mol\(^{-1}\)) for the following reaction? \[ \mathrm{CH_4(g)\rightarrow C(g)+4H(g)} \] Given \[ \Delta_fH^\circ(\mathrm{CH_4})=-74.8\ \text{kJ mol}^{-1}, \] \[ \mathrm{H_2(g)\rightarrow 2H(g)};\qquad \Delta_aH^\circ=435\ \text{kJ mol}^{-1}, \] \[ \mathrm{C(s)\rightarrow C(g)};\qquad \Delta_aH^\circ=716.7\ \text{kJ mol}^{-1}. \]

The chemical prepared by Solvay's process is \(X\). The chemical prepared by Castner-Kellner process is \(Y\). \(X\) and \(Y\) are respectively

A solution is prepared by reacting \(500\) mL of \(0.2\) M \(\mathrm{KMnO_4}\) with \(500\) mL of \(0.2\) M \(\mathrm{KBr}\) solution in basic medium. What are the concentrations of \(\mathrm{KBr}\) and \(\mathrm{KBrO_3}\) respectively in the resultant solution?

At \(T\)(K), the pressure of two ideal gases \(A\) and \(B\) is in the ratio \[ P_A:P_B=2:5. \] At this temperature, their densities are the same. The molar mass ratio \[ (M_A:M_B) \] is

How many of the following molecules ions are paramagnetic in nature? \[ \mathrm{N_2,\ O_2,\ F_2,\ NO,\ CO,\ O_2^-,\ O_2^{2-},\ N_2^+,\ NO^+,\ NO^-,\ H_2} \]

Which of the following is an endothermic process? \((g=\text{gas})\)

Consider the following \[ \mathrm{HF,\ H_2O,\ BeCl_2,\ CO_2,\ BF_3,\ NF_3,\ CCl_4,\ CHCl_3} \] The number of polar molecules is

In which of the following compounds, the size of manganese is maximum?

Observe the given two statements about \(\alpha\)-particle experiment and Rutherford assumptions. Statement-I: The ratio of atomic radius to its nuclear radius is \(10^5\). Statement-II: In an atom, the majority of the space is vacant. The correct answer is

The work functions of three metals \(A\), \(B\) and \(C\) are respectively \(2.25\), \(2.42\) and \(3.6\) eV. All the three metals are irradiated with light of wavelength \(330\) nm. The kinetic energies of photoelectrons emitted from \(A\), \(B\) and \(C\) are respectively \(E_A\), \(E_B\) and \(E_C\). The correct relationship among \(E_A\), \(E_B\) and \(E_C\) is \[ (h=6.6\times10^{-34}\ \mathrm{Js},\; c=3\times10^8\ \mathrm{ms^{-1}}) \]

Given below are two statements Statement-I: Phenol is acidic due to resonance stabilization of phenoxide ion. Statement-II: Phenol has no reaction with \(\mathrm{Na_2Cr_2O_7}\) and concentrated \(\mathrm{H_2SO_4}\). The correct answer is