List of top Chemistry Questions asked in AP EAPCET

The energy of the second bohr orbit of the hydrogen atom is $-328 \, \text{kJ mol}^{-1}$; hence the energy of the fourth bohr orbit would be:

Which of the following polymer is bio-degradable polymer:

When lithium nitrate and calcium nitrate are heated in separate test tubes, which of the following observations would be identical for both?

The number of unit cells in 5.85 g of cube shaped ideal crystal of NaCl \((Z=4)\) is \(x\times10^{21}\). The value of x is

Observe the following reaction sequence (major product). \[ \mathrm{CH_3CH_2CH_2Br} \xrightarrow{\mathrm{HBr}} Y \xrightarrow[\text{major}]{\mathrm{alc.\ KOH}} Z \] Correct statement regarding \(Z\) is

If the velocity of an electron in the first Bohr's orbit of H-atom is x $ms^{-1}$, then the velocity (in $ms^{-1}$) of an electron in the fourth Bohr's orbit of the same atom is:

Which one of the pairs will form a buffer solution?

At \(1\,\mathrm{K}\), \(15\) moles of \(\mathrm{H_2}\) reacts with \(5.2\) moles of \(\mathrm{I_2}\) and forms \(10\) moles of \(\mathrm{HI}\). The equilibrium constant for the reaction \[ 2\mathrm{HI}(g)\rightleftharpoons \mathrm{H_2}(g)+\mathrm{I_2}(g) \] is

Which of the following statements are correct about adsorption from solution phase? I. The extent of adsorption decreases with an increase in temperature II. The extent of adsorption depends upon the concentration of solute in solution III. The extent of adsorption depends on nature of adsorbate and adsorbent

If three faradays of electricity is passed through the solutions of \(AgNO_3\), \(CuSO_4\) and \(AuCl_3\), the molar ratio of cations deposited at the cathodes will be:

The emf values of three galvanic cells I, II and III are \(E_1\), \(E_2\) and \(E_3\) respectively. Determine the correct order among them. \[ \text{(I)}\quad Zn|Zn^{2+}(1M)||Cu^{2+}(0.1M)|Cu \] \[ \text{(II)}\quad Zn|Zn^{2+}(1M)||Cu^{2+}(1M)|Cu \] \[ \text{(III)}\quad Zn|Zn^{2+}(0.1M)||Cu^{2+}(1M)|Cu \]

Which of the following vitamins is water-soluble?

If a graph is drawn between \(log(x/m)\) (y-axis) and log p (x-axis) we get a straight line with slope equal to 2 and intercept equal to 0.60. The value of x/m at 9 atm is (\(log 4=0.60\))

An organic compound has the empirical formula CH$_2$O. Its vapour density is 45. The molecular formula of compound is

The difference between the radii of M and N shells of $He^+$ is $\Delta R_1$(nm). The difference between the radii of L and N shells of $Li^{2+}$ is $\Delta R_2$(nm). The ratio of $\Delta R_1$ to $\Delta R_2$ is:

In which of the following reactions, chlorine undergoes disproportionation? \[ \begin{aligned} \text{I.} \quad & \text{Reaction with cold, dilute NaOH} \\ \text{II.} \quad & \text{Reaction with hot, concentrated NaOH} \\ \text{III.} \quad & \text{Reaction with } \mathrm{H_2S} \end{aligned} \] The correct answer is

When 50 mL of 2M \(N_{2}O_{5}\) was heated, 0.28 L of \(O_{2}\) was formed at STP after 30 minutes. The concentration of unreacted \(N_{2}O_{5}\) is X M and average rate is Y. What are X and Y?

At \(T(K)\), the rms velocity of an ideal gas is \(x\,\text{m s}^{-1}\). At what temperature (in K), the rms velocity becomes \(3x\,\text{m s}^{-1}\)?

In which of the following reactions mesityl oxide is formed?

A solid solute is dissolved in water. The mole fraction of solute is 0.02. What is the molality of the solution?

Study the following list: I. Lys, II. Gln, III. Ser, IV. Cys, V. Tyr, VI. Asn. X is the set of amino acids containing -OH group and Y is the set of amino acids containing -CONH$_2$ group. What are X and Y respectively?

Which of the following is a conjugate acid-base pair?

Toluene undergoes bromination in presence of iron followed by treatment with sodium in dry ether. The major product formed is \[ C_6H_5CH_3 \xrightarrow{Br_2/Fe} X \xrightarrow{2Na,\ dry\ ether} Y \]