List of top Chemistry Questions asked in AP EAPCET

The standard enthalpy of atomization of ethane according to the equation $ \text{C}_2\text{H}_6(g) \rightarrow 2\text{C}(g) + 6\text{H}(g) $ is $ 622 \, \text{kJ mol}^{-1} $. If standard mean C-H bond dissociation enthalpy is $ 99 \, \text{kJ mol}^{-1} $, the standard mean dissociation enthalpy of C-C bond (in kJ mol$ ^{-1} $) is
Total number of angular nodes of orbitals associated with third shell $ (n=3) $ of an atom is:
The number of metalloids in the following elements are: Si, Mn, B, F, Cu, Ag, K, Sb, As, Na, Ge
Which of the following sets of quantum numbers is correct for an electron in 4f orbital?
An oxide of chlorine with water gives the strongest acid. The ratio of chlorine and oxygen in its formula is:

The metal and metalloid in the $5^{th}$ period of the long form of the periodic table are respectively

Number of electrophiles from the following: CH₄, CO₂, NH₃, H₂O, SO₃, H⁺, BF₃

34.2% (W/V) sucrose $ \left( \text{C}_6\text{H}_2\text{O}_1\right) $ solution is isotonic with 18% (W/V) of unknown solution X. Formula of X is

The rate constants of a first-order reaction at 300 K is $ k_1 $ and 400 K is $ k_2 $. What is the value of $ \frac{k_2}{k_1} $ if activation energy of reaction is $ 41.5 \, \text{kJ mol}^{-1} $?
($R = 8.314 \, \text{J K}^{-1} \text{mol}^{-1}$

Consider the disproportionation reaction $ 2 \, \text{Cu}^{+} \rightleftharpoons \text{Cu}^{2+} + \text{Cu}(s) $. At equilibrium $[ \text{Cu}^{+} ] / [ \text{Cu}^{2+} ] = 10^4 $. If $ E_{\text{Cu}^{+}/\text{Cu}} = 0.15 \, \text{V} $, then $ E_{\text{Cu}^{2+}/\text{Cu}} $ (in V) is:

Match the following:
List - I (Enzyme reaction)   List - II (Enzyme used)
 

List - I (Enzyme reaction)List - II (Enzyme used)
A. SucroseI. Zymase
B. ProteinsII. Pepsin
C. StarchIII. Invertase
D. GlucoseIV. Diastase
Observe the two statements
Assertion (A): Benzyl chloride undergoes S$_{N}$1 reaction readily while chloro benzene does not.
Reason (R): C-Cl bond in chlorobenzene has partial double bond due to resonance.
The correct answer is

Basicity order of the following amines in aqueous medium
i) N-Methylaniline i
i) N, N-Dimethylaniline 
iii) Aniline

DDT is
The correct statement with respect to D-glucose (x) and D-Fructose (y) is D-glucose (x) and D-fructose (y) are related as follows.
Identify the correct statement with respect to enzyme competitive (X) and non-competitive (Y) inhibitors.
Two statements are given below
Statement (I): C-O bond length in methanol is 136 pm and in phenol 142 pm.
Statement (II): The C-O-H bond angle in methanol and phenol is almost same.
An organic compound with molecular formula C$_6$H$_6$O gives an orange-red precipitate with 2,4-dinitrophenylhydrazine. It gives negative Tollens' test. The product of it with hydroxylamine is

Better results for the preparation of ethers X and Y can be obtained from reactant pairs respectively

The structure of $\beta$-D-galactopyranose is
Among Mn, Tc, Re, and Bh, which are having the (n-1)d$^5$ ns$^2$ electronic configuration?
The geometries of mononuclear carbonyl complexes of Cr, Fe, Ni are respectively
SO$_3$ + H$_2$SO$_4$ $\rightarrow$ X + H$_2$O, Y (Hot, Conc) + C $\rightarrow$ Q + R + Z
Z is a neutral oxide. The shapes of molecules of Q and R respectively are

Which of the following are homopolymers?

Which of the following reactions occur during calcination?