List of top Chemistry Questions asked in AP EAMCET

Match the following bond enthalpies with their respective bonds: 

From the following, identify the groups that exhibit negative resonance (-R) effect when attached to a conjugated system: \[ \text{Formyl (A), Amino (B), Alkoxy (C), Cyano (D), Nitro (E)} \]
A dibromide \( X (C_4H_8Br_2) \) on dehydrohalogenation gave \( Y \), which on reduction with \( Z \) gave a non-polar isomer of \( C_4H_8 \). What are \( X \) and \( Z \) respectively?
The concentration of 1L of \( CaCO_3 \) solution is 1000 ppm. What is its concentration in mol \( L^{-1} \)?
(Ca = 40 u, O = 16 u, C = 12 u)
At 293 K, methane gas was passed into 1 L of water. The partial pressure of methane is 1 bar. The number of moles of methane dissolved in 1 L water is
(K$_H$ of methane = 0.4 kbar).

At 298 K, for a first order reaction (A → P) the following graph is obtained. The rate constant (in s\(^{-1}\)) and initial concentration (in mol L\(^{-1}\)) of ‘A’ are respectively: 

Given below are two statements:
Statement-I: Easily liquefiable gases are readily adsorbed.
Statement-II: Adsorption enthalpy for physisorption is less compared to adsorption enthalpy for chemisorption.
The correct answer is:
Which of the following does not show optical isomerism?
A polymer X is biodegradable and is obtained from the monomers Y, Z. What are Y and Z?
Which of the following is an essential amino acid?
Which of the following hormones is responsible for preparing the uterus for implantation of a fertilized egg?
Identify the correct set from the following.
Chlorobenzene (X) when reacted with reagent ‘A’ gets converted to phenol (Y). The major product obtained from nitration of X gets converted to p-nitrophenol (Z) by reaction with reagent B. What are A and B respectively?

Match the following reactions with the product obtained from them: 

What are X and Y respectively in the following reaction sequence?  

Arrange the following in decreasing order of their acidity: 

What are X and Y in the following set of reactions?

An alkyl halide \( C_3H_7Cl \), on reaction with a reagent X, gave the major product Y (\( C_4H_7N \)). Y on hydrolysis released a gas, which turns red litmus to blue. What are X and Y?
Aniline on direct nitration at 288 K gives 51% (A), 47% (B) and 2% (C). ‘B’ on diazotisation, followed by reaction with CuCN | KCN gives a compound X. The percentage of nitrogen in X is:

Identify Z in the following reaction sequence. 


 

What are the reagents X and Y respectively used in the following reaction sequence to convert a nitrile to a methyl group? 


 

Cumene on oxidation in the presence of air gives a compound X. This in the presence of dilute acid gives Y and Z. The total number of \( sp^2 \) carbons in Y and Z is:

What are X, Y and Z in the given reaction sequence?


 

The product of Finkelstein reaction X, is not used in which of the following named reaction?
In the ground state of hydrogen atom, electron absorbs 1.5 times energy than the minimum energy \( (2.18 \times 10^{-18} J)\) to escape from the atom. The wavelength of the emitted electron (in m) is \((m_e = 9 \times 10^{-31} kg)\)