List of top Questions asked in AP EAPCET

The major products \(P\) and \(Q\) of the following reactions respectively are: \[ \text{I.}\quad n\text{-Pentyl bromide}\xrightarrow{Zn/H^+}P \] \[ \text{II.}\quad n\text{-Pentyl bromide}\xrightarrow[\text{Dry Ether}]{Na}Q \]

\(Z\) is an aromatic compound with substituents \(P\) and \(Q\). What are \(P\) and \(Q\)?

The hybridization of elements present in Fullerene and graphite are respectively:

Which of the following behaves as a Lewis acid?

Identify A, B, C, and D in the reactions (I), (II): \[ \text{(I)}\quad xCl_2+yNaOH \rightarrow A+B+H_2O(l) \] (cold, dil) \[ \text{(II)}\quad xCl_2+yNaOH \rightarrow C+D+H_2O(l) \] (hot, conc)

Enthalpy of formation of \(CO(g)\), \(CO_2(g)\), \(N_2O(g)\) and \(N_2O_4(g)\) are \(-110\), \(-393\), \(81\), \(9.7\ \text{kJ mol}^{-1}\) respectively. Calculate \(\Delta_rH\) for the following reaction: \[ N_2O_4(g)+3CO(g)\rightarrow N_2O(g)+3CO_2(g) \]

Identify the correct statements from the following:
(a) The ionic product of water at \(100^\circ C\) is \(\lt 10^{-14}\).
(b) pH of a solution decreases with increasing temperature.
(c) \(NaH_2PO_4\) on hydrolysis gives a basic solution.
(d) \(NH_3\) can act both as Bronsted acid and base.

For a reaction to be spontaneous, the required conditions are:

\(1\ \text{L}\) of \(0.02\ \text{M}\) aqueous \(HCl\) is mixed with \(1\ \text{L}\) of \(0.01\ \text{M}\) aqueous \(H_2SO_4\) solution. Assuming complete dissociation and no change in the volume upon mixing, the pH of resultant solution is \((\log_{10}2=0.3)\):

The mass % of carbon in \(C_{57}H_{110}O_6\) is:

The mass of hydrogen in grams present in \(1.0\ \text{L}\) of pure water of density \(1.0\ \text{g cm}^{-3}\) is:

The ratio of rates of diffusion of Helium (\(He\)) to Hydrogen (\(H_2\)) is:

The correct order of dipole moment of the molecules \(NH_3\) (I), \(BF_3\) (II), \(H_2O\) (III), \(NF_3\) (IV) is:

Equivalent weights of \(KMnO_4\) and \(K_2Cr_2O_7\) in acidic medium are respectively. (Molecular weight of \(KMnO_4=M_A\) and Molecular weight of \(K_2Cr_2O_7=M_B\))

The successive ionization enthalpies of an element \(X\) in \(\text{kJ mol}^{-1}\) are \(1012,\ 1907,\ 2955,\ 4955,\ 6275\) and \(21260\) respectively, the element \(X\) is:

The number of \(sp^2\), \(sp^3\) hybridised carbons in cumene, respectively are:

The spectral series formed when electrons of excited hydrogen atoms return to the third orbit from higher energy orbits is:

The logic gates in which all the inputs must be low to get a high output are:

The maximum amplitude of an AM wave is found to be \(20\ \text{V}\) while its minimum amplitude is \(4\ \text{V}\). The modulation index is:

The incorrect set of quantum numbers \((n,l,m,s)\) for an electron in \(3p\) orbital is:

Identify the elements \(x\) and \(z\) in the following representation. (Sb = antimony)

A short bar magnet placed in a horizontal plane has its axis aligned along north-south direction. Null points are found on the axis of the magnet at \(20\ \text{cm}\) from the center of magnet. The earth's magnetic field at the place is \(B\) and angle of dip is \(0^\circ\). If the total magnetic field on the normal bisector of the magnet \(20\ \text{cm}\) from the center of the magnet is \(0.6\ \text{G}\), then the magnitude of \(B\) is:

A radioactive substance has a half life of \(10^8\) years and an activity of \(10^4\ \text{Bq}\). The number of atoms of this substance present is:

\(\dfrac{50}{\pi}\ \mu\text{F}\) capacitor is connected to a \(250\ \text{V},\ 50\ \text{Hz}\) AC supply. Then the rms current of the circuit is:

Microwaves are used in the following: