List of top Questions asked in AP EAMCET

The principal quantum number \( n \) corresponding to the excited state of \( He^+ \) ion, if on transition to the ground state two photons in succession with wavelengths \( 1026 \text{\AA} \) and \( 304 \text{\AA} \) are emitted: \((R = 1.097 \times 10^7 \text{ m}^{-1})\)
Which physical quantity is measured in barn?
Which one of the following is not classified as pulse modulation?
Two statements are given below:
Statement I: Nitrogen has more ionization enthalpy and electronegativity than beryllium.
Statement II:\( CrO_3 \), \( B_2O_3 \) are acidic oxides.
Correct answer is:
The ratio of ground state energy of \( \text{Li}^{2+}, \text{He}^{+}, \text{H} \) is:
At \( T(K) \) for one mole of an ideal gas, the graph of \( P \) (on y-axis) and \( V^{-1} \) (on x-axis) gave a straight line with slope of \( 32.8 \) L atm mol\(^{-1} \). What is the temperature (in K)? \((R = 0.0821 \text{ L atm mol}^{-1} \text{ K}^{-1})\)
Identify the correct statements from the following:
i. Reaction of hydrogen with fluorine occurs even in dark.
ii. Manufacture of ammonia by Haber process is an endothermic reaction.
iii. HF is an electron-rich hydride.
In which of the following reactions, hydrogen is one of the products?
Two statements are given below:
Statement I: SnF\(_4\), PbF\(_4\) are ionic in nature.
Statement II: GeCl\(_2\) is more stable than GeCl\(_4\).
The correct answer is:
Species A, B, C, D formed in the following bond cleavages respectively are
bond cleavages
Two statements are given below.
Statement I: The reaction Cr$_2$O$_3$ + 2Al → 2Cr + Al$_2$O$_3$ (ΔG° = -421 kJ) is thermodynamically feasible.
Statement II: The above reaction occurs at room temperature.
The correct answer is
Assertion (A): Carboxylic acids are more acidic than phenols.
Reason (R): Resonance structures of carboxylate ion are equivalent, while resonance structures of phenoxide ion are not equivalent.
In the reaction sequence, Y is: \[ CH_3CO_2H \xrightarrow{\text{(1) NH}_3, \text{(2)} \Delta} P \xrightarrow{\text{Br}_2/\text{NaOH}} Y \]
What is the major product 'Z' in the following sequence?
major product ’Z’ in the following sequence
Consider the following reactions. \[ \text{C}_2\text{H}_2 + \text{H}_2\text{O} \xrightarrow[\text{333 K}]{\text{Hg}^{2+}/\text{H}^+} [X] \xrightleftharpoons{\text{Isomerization}} Y \] Y cannot be obtained from which of the following reactions?
Polymers that can be softened on heating and hardened on cooling are called
The number of –OH groups in open chain and ring structures of D-glucose are respectively
Conversion of X to Y is an example of
Conversion of X to Y is an example of
Which of the following is not an example of allylic halide?
Which of the following solutions is used in the styptic action which prevents bleeding of blood?
‘A’ is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of 10% NaCl is added. What is the gold number of ‘A’?
‘A’ is a protecting colloid.
The basicity of H$_3$PO$_2$, H$_3$PO$_3$, H$_3$PO$_4$ respectively is
Which of the following reactions of KMnO$_4$ occurs in acidic medium?
Which complex among the following is most paramagnetic?
In water, which of the following gases has the highest Henry’s law constant at 293 K?