List of top Chemistry Questions asked in TS EAMCET

In which of the following the s-block elements are arranged in the correct order of their melting points?

Zinc on reaction with concentrated nitric acid gives an oxide of nitrogen (A). Zinc with dilute nitric acid gives another oxide of nitrogen (B). Oxidation numbers of nitrogen in (A) & (B) are respectively

The increasing order of boiling points of the following is

Which of the following statements is not correct?

Reagents and compound to convert ethyl bromide → 2-butanone:

The number of lone pairs of electrons on the central atom of $\text{XeO}_3, \text{XeOF}_4$ and $\text{XeF}_6$ respectively is

Which of the following statement is not correct?

If the sum of bond orders of O$_2$ and O$_2^-$ is x, then bond order of O$_2^+$ will be

What are X and Y in the following reaction sequence?

Identify correctly matched sets:
I. NaHCO$_3$ - fire extinguisher
II. Na$_2$CO$_3$ - water softening
III. NaOH - purification of bauxite

Observe the elements from H (Z=1) to Ca (Z=20). How many elements have no unpaired electrons in their ground state?

Observe the elements from H(Z=1) to Ca(Z=20). The number of elements with 1, 2 and 3 unpaired electrons in their ground state is respectively

According to Bohr's theory of hydrogen atom, the approximate angular momentum of electron in H atom in the ground state is ($h = 6.62 \times 10^{-34}$ Js):

The emission spectrum of hydrogen contains a few lines. The energy ($\Delta E$) of one of the lines is $0.4578 \times 10^{-18}J$. The $n_1$ and $n_2$ belonging to this line are respectively

Isopentyl alcohol reacts with reagent X → carboxylic acid → decarboxylation → Y. Reaction of Y with Z → t-butyl alcohol. Identify X and Z.

An alcohol X (C$_4$H$_{10}$O) reacts with Conc.HCl/ZnCl$_2$ to give corresponding chloride. X on dehydration forms Y, which reacts with Baeyer's reagent to give Z. What is Z?

An alcohol X ($\text{C}_5\text{H}_{12}\text{O}$) produces turbidity instantly with conc. $\text{HCl}/\text{ZnCl}_2$. Isomer (Y) of $\text{X}$ undergoes dehydration with conc. $\text{H}_2\text{SO}_4$ at $443 \text{ K}$. $\text{X}$ and $\text{Y}$ respectively are

The Gibbs energy change of the reaction (in kJ mol⁻¹) corresponding to the following cell
Cr | Cr³⁺(0.1M) || Fe²⁺(0.01 M) | Fe
(Given: \(E^\circ_{Cr^{3+}/Cr} = -0.75V\); \(E^\circ_{Fe^{2+}/Fe} = -0.45V\), 1F = 96,500 C mol⁻¹)

At 298 K, equilibrium: M(s)+2Ag$^+$(aq)→M$^{2+}$(aq)+2Ag(s), K=10$^{15}$, ΔS=10 J/K. Find ΔrH (kJ/mol). FRT×2.303=0.06, F=96500 C/mol.

The molar conductivity of acetic acid solution at infinite dilution is 390 S cm$^2$ mol$^{-1}$. What is the molar conductivity of 0.01 M acetic acid solution (in S cm$^2$ mol$^{-1}$)? (Given: $K_a(\text{CH}_3\text{COOH})=1.8\times10^{-5}$, assume $1-\alpha \approx 1$)

At $298 \text{ K}$ the equilibrium constant for the reaction, $\text{M}(\text{s})+2\text{Ag}^+(\text{aq}) \rightleftharpoons \text{M}^{2+}(\text{aq})+2\text{Ag}(\text{s})$ is $10^{15}$. What is the $E_{\text{cell}}^{\circ}$ (in $\text{V}$) for this reaction? ($\frac{2.303 \text{ RT}}{F} = 0.06 \text{ V}$)

The equilibrium constant for the reaction $M(s) + 2Ag^{+}(aq) \rightarrow M^{2+}(aq) + 2Ag(s)$ is $10^{15}$. What is the Gibbs energy change ($\Delta_r G^{\ominus}$ in KJ mol$^{-1}$) for this reaction?
($\frac{RT}{F} \times 2.303 = 0.06V$; F = 96500 C mol$^{-1}$)

At 298K, if the standard Gibbs energy change \(\Delta_r G^\circ\) of a reaction is - 115 kJ, the value of \(\log_{10} K_p\) will be (\(R = 8.314 \text{ J K}^{-1}\text{mol}^{-1}\))

Identify the correct statements:
I. Energy of an isolated system is constant
II. In a closed system, exchange of both energy and matter is possible
III. Enthalpy is extensive