List of top Chemistry Questions asked in AP EAPCET

The signs of $\Delta H^\circ$ and $\Delta S^\circ$ for a reaction to be spontaneous at all temperatures respectively are

Which of the following reactions give $\mathrm{H_2}$ as one of the products? (Reactions are not balanced.)

$\mathrm{NaBH_4 + I_2}$
$\mathrm{B_2H_6 + N(CH_3)_3}$
$\mathrm{Al + NaOH + H_2O}$
$\mathrm{BF_3 + NaH}$

Identify the hydride which is not correctly matched with the example given in brackets.

The conjugate base of phosphorus acid is $ x $. The conjugate base of oleum is $ y $. What are $ x $ and $ y $, respectively?

In Solvay process, $\mathrm{NH_3}$ is recovered when the solution containing $\mathrm{NH_4Cl}$ is treated with compound ‘X’. What is ‘X’?

At temperature $ T(K) $, the equilibrium constant $ K_c $ for the reaction: $$ \mathrm{AO_2(g) + BO_2(g) \rightleftharpoons AO_3(g) + BO(g)} $$ is 16. In a 1 L flask, one mole each of $\mathrm{AO_2}$, $\mathrm{BO_2}$, $\mathrm{AO_3}$, and $\mathrm{BO}$ are taken and heated to $ T(K) $. Identify the correct statements:

Total number of moles at equilibrium is 4
At equilibrium, the ratio of moles of $\mathrm{AO_2}$ and $\mathrm{AO_3}$ is 1:4
Total number of moles of $\mathrm{AO_2}$ and $\mathrm{BO_2}$ at equilibrium is 0.8

2.0 g of H$_2$ diffuses through a porous container in 10 minutes. How many grams of O$_2$ will diffuse from the same container in the same time under identical conditions?

100 mL of aqueous solution of 0.05 M Cu$^{2+}$ is added to 1 L of 0.1 M KI solution. The resultant solution was titrated with 0.1 M Na$_2$S$_2$O$_3$ solution using starch indicator until blue color disappeared. What is the volume (in mL) of Na$_2$S$_2$O$_3$ used?

The sum of the bond orders of O$_2^+$, O$_2^-$, O$_2$, O$_2^{2-$, and the sum of the unpaired electrons in them respectively are

Among the ions Mg$^{2+}$, O$^{2-}$, Al$^{3+}$, F$^{-}$, Na$^{+}$, and N$^{3-}$, the ion with the largest size and the ion with the smallest size are respectively

At T(K), the $v_{\text{rms}$ of CO$_2$ is 412 m/s$^{-1}$. What is its kinetic energy (in kJ mol$^{-1}$) at the same temperature? (CO$_2$ = 44 u)

The correct order of increasing bond lengths of C--H, O--H, C--C, and H--H is

The work function of Cu is 7.66 $\times 10^{-19}$ J. If photons of wavelength 221 nm are made to strike the surface (h = 6.63 $\times 10^{-34}$ Js), the kinetic energy (in J) of the ejected electrons will be

In an element with atomic number (Z) 25, the number of electrons with (n + l) value equal to 3 and 4 are x and y respectively. The value of (x + y) is

How many amines with molecular formula C$_3$H$_9$N can react with benzene sulphonlyl chloride?

The correct statement about the product of the following reaction is:
\[ \text{CH}_3\text{CHO} \xrightarrow{(i)\ \text{C}_2\text{H}_5\text{MgBr}} \xrightarrow{(ii)\ \text{H}_2\text{O}} \text{product} \]

The correct order of boiling points of the compounds given below is
[A)] Methoxy ethane
[B)] Propan-1-ol
[C)] Propanal
[D)] Propanone

Which of the following represents Etard reaction?

Match the following: