List of top Chemistry Questions asked in AP EAPCET

One mole of \( \text{C}_2\text{H}_5\text{OH(l)} \) was completely burnt in oxygen to form \( \text{CO}_2\text{(g)} \) and \( \text{H}_2\text{O(l)} \). The standard enthalpy of formation (\( \Delta_f H^\ominus \)) of \( \text{C}_2\text{H}_5\text{OH(l)} \), \( \text{CO}_2\text{(g)} \) and \( \text{H}_2\text{O(l)} \) is x, y, z kJ mol\(^{-1}\) respectively. What is \( \Delta_r H^\ominus \) (in kJ mol\(^{-1}\)) for this reaction?
At \( 298 \) K, \( \Delta U^\circ \) and \( \Delta S^\circ \) for the following reaction are \( -10.5 \) kJ and \( +44.1 \) J\( K^{-1} \); \( 2X(g) + Y(g) \longrightarrow 2Z(g) \). What is \( \Delta G^\circ \) (in kJ) for this reaction? (\( R = 8.314 \) J\( K^{-1} \)mol\(^{-1} \))
One mole of \( \text{C}_2\text{H}_5\text{OH(l)} \) was completely burnt in oxygen to form \( \text{CO}_2\text{(g)} \) and \( \text{H}_2\text{O(l)} \). The standard enthalpy of formation (\( \Delta_f H^\ominus \)) of \( \text{C}_2\text{H}_5\text{OH(l)} \), \( \text{CO}_2\text{(g)} \) and \( \text{H}_2\text{O(l)} \) is x, y, z kJ mol\(^{-1}\) respectively. What is \( \Delta_r H^\ominus \) (in kJ mol\(^{-1}\)) for this reaction?
A and B are ideal gases. At T(K), 2 L of A with a pressure of 1 bar is mixed with 4 L of B with a pressure of P\(_B\) bar in a 100 L flask. The pressure exerted by gaseous mixture is 0.1 bar. What is the value of P\(_B\) in bar?
At \( 298 \) K, \( \Delta U^\circ \) and \( \Delta S^\circ \) for the following reaction are \( -10.5 \) kJ and \( +44.1 \) J\( K^{-1} \); \( 2X(g) + Y(g) \longrightarrow 2Z(g) \). What is \( \Delta G^\circ \) (in kJ) for this reaction? (\( R = 8.314 \) J\( K^{-1} \)mol\(^{-1} \))

How many molecules are present in 4.4 grams of CO\(_2\)? 
(Molar mass of CO\(_2\) = 44 g/mol, Avogadro's number = \(6.022 \times 10^{23}\))

Two 1 L flasks at T(K) contain O2 and helium with rms velocities of x m s-1 and y m s-1, respectively. What is the relationship between x and y?
Which option has the greatest mass?
Which of the following has the highest ionization energy?
Which element has the smallest atomic radius among the following?
Choose the incorrect statement from the following:
Match the following
The ratio of wavelengths of first line (\( n_2 = 3 \)) and second line (\( n_2 = 4 \)) of Balmer series of hydrogen spectrum is
The orbital with number of total nodes as 3 and angular nodes as 3 is
The ratio of wavelengths of first line (\( n_2 = 3 \)) and second line (\( n_2 = 4 \)) of Balmer series of hydrogen spectrum is
The number of d-electrons in Fe2+ (Z = 26) is not equal to:

Which of the following represents the wavelength of spectral line of Balmer series of He$^+$ ion? (R = Rydberg constant, n $>$ 2)

During the denaturation of proteins, which of the following structures will remain intact?
Identify the sets in which enzyme, its source and enzyme reaction are correctly matched:
I) maltase, yeast; proteins $\rightarrow$ peptides
II) diastase, malt; starch $\rightarrow$ maltose
III) zymase, yeast; glucose $\rightarrow$ C$_2$H$_5$OH + CO$_2$
Sucrose when boiled with dilute HCl gives two functional isomers X and Y. X gives monocarboxylic acid with bromine water but not Y. The number of --OH groups in cyclic structure of X is
Identify the correct statements regarding the enzymes
I) Almost all enzymes are proteins
II) Enzymes are not specific in nature
III) Enzymes work effectively in the pH range of 5–7
IV) Enzymes work effectively between 310 K and 330 K temperature
Which of the following reagents will oxidise glucose to gluconic acid?
Br$_2$/H$_2$O
HNO$_3$
[Ag(NH$_3$)$_2$]^+ / OH$^-$
Which of the following contain $\alpha$-D-glucose units?
a) cane sugar b) milk sugar c) cellulose d) amylose
The pyrimidine bases found in RNA are

Match the following:
List-I (Glycosidic linkage) 
A. $\alpha$-1,4 
B. $\beta$-1,4 
C. $\alpha$-1,4, $\alpha$-1,6 
List-II (Polysaccharide) 
I. Amylose 
II. Amylopectin 
III. Cellulose