List of top Chemistry Questions asked in AP EAPCET

Which of the following will give a white precipitate with \( \text{AgNO}_3 \) solution?
Identify the set containing isoelectronic species.
In which polymer preparation, Ziegler–Natta catalyst is used?
The percentage of ionization of \( 1 \, \text{L} \) of \( x \, \text{M} \) acetic acid is \( 4.242\% \) and is called solution "A". The percentage of ionization of \( 1 \, \text{L} \) of \( y \, \text{M} \) acetic acid is \( 3\% \) and is called solution "B". Solution "A" is mixed with solution "B". What is the concentration of acetic acid in the resultant solution? (\( K_a \) of acetic acid = \( 1.8 \times 10^{-5} \))
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?
The conjugate acid and base of ammonia are X and Y, respectively. What are the shapes of X and Y?
A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is its empirical formula?
Identify the incorrect statement about the group 13 elements
The improper functioning of 'X' results in Addison's disease. Hormone 'Y' is responsible for the development of secondary female characteristics. 'X' and 'Y' are respectively:
The radius of fourth orbit in \( He^+ \) ion is \( R_1 \) pm and radius of third orbit in \( Li^{2+} \) ion is \( R_2 \) pm. The value of \( (R_1 - R_2) \) in pm is:
For which of the following processes entropy change (\(\Delta S\)) is negative?
I) Sublimation of dry ice
II) Freezing of water
III) Crystallisation of the dissolved substance
IV) Burning of rocket fuel
At \( T \)(K), the vapour pressure of pure benzene and toluene are \( 75 \) and \( 22 \) mm Hg respectively. 23.4 g of benzene and 64.4 g of toluene are mixed to form an ideal solution. If the vapours are in equilibrium with the liquid mixture, the mole fraction of toluene in vapour phase is:
At T(K), the following gaseous equilibrium is established. W + X \( \rightleftharpoons \) Y + Z The initial concentration of W is two times to the initial concentration of X. The system is heated to T(K) to establish the equilibrium. At equilibrium the concentration of Y is four times to the concentration of X. What is the value of \(K_c\)?
Observe the following numbers:
I) 0.0063
II) 132.00
III) 1004
The number of significant figures in I, II and III respectively is
Which of the following does not exist?

Match the items given in List-I and List-II.

 

The wavenumber of the first line (\(n_2 = 3\)) in the Balmer series of hydrogen is \( \overline{\nu}_1 \, \text{cm}^{-1} \). What is the wavenumber (in cm\(^{-1}\)) of the second line (\(n_2 = 4\)) in the Balmer series of He\(^{+}\)? 

What volume will 2 moles of an ideal gas occupy at STP (Standard Temperature and Pressure)?
Choose the incorrect statement from the following
The energy required to increase the temperature of 180 g of liquid water from 10$^\circ$C to 15$^\circ$C is 3765 J. What is $C_p$ of water in J mol$^{-1}$ K$^{-1}$? ($H_2O$ = 18 u)

At T(K), \( K_c \) value for \( \text{AO}_2(g) + \text{BO}_2(g) \rightleftharpoons \text{AO}_3(g) + \text{BO}(g) \) is 16. In a closed 1 L flask, one mole each of \( \text{AO}_2 \), \( \text{BO}_2 \), \( \text{AO}_3 \), and \( \text{BO} \) are taken and heated to T(K). What is the concentration (in mol L\(^{-1}\)) of \( \text{AO}_3 \) at equilibrium?  

How many atoms are present in 1 mole of oxygen gas (O2)?

How many of the following molecules / ions have a trigonal planar structure? 
\( \text{BO}_3^{3-}, \, \text{NH}_3, \, \text{PCl}_3, \, \text{BCl}_3, \, \text{ClF}_3, \, \text{XeO}_3 \)

The enthalpy change (ΔH) for the reaction N2(g) + 3H2(g) → 2NH3(g) is -92 kJ/mol.

What is the enthalpy change for the decomposition of 1 mol of NH3(g) into its elements?
The \(E^\circ_{{M}^+_{(aq)}}/{M}_{(s)}\) is highest with negative sign for alkali metal 'x' and lowest with negative sign for alkali metal 'y'. In flame test, the characteristic colours of 'x' and 'y' are respectively: