List of top Chemistry Questions asked in AP EAMCET

If the first ionisation enthalpy of Li, Be and C respectively are 520, 899, 1086 kJ/mol, the first ionisation enthalpy (in kJ/mol) of B will be

The correct order of density of Be, Mg, Ca, Sr is:

The bond lengths of diatomic molecules of elements X, Y, and Z respectively are 143, 110, and 121 pm. The atomic numbers of X, Y, and Z respectively are:

A → P is a zero-order reaction. At 298 K, the rate constant of the reaction is $ 1 \times 10^{-3} $ mol L$^{-1}$ s$^{-1}$. Initial concentration of 'A' is 0.1 mol L$^{-1}$. What is the concentration of 'A' after 10 sec?

Two statements are given below:
I. SO₂ is used as antioxidant in wine
II. BHA is used as food preservative in dry fruits

In which of the following Galvanic cells, emf is maximum? (Given: $ E^\circ_{\text{Mg}} = -2.36 \, V $ and $ E^\circ_{\text{Cl}_2/\text{Cl}^-} = +1.36 \, V $)

What happens when $ \mathrm{H_2O_2} $ is added to an aqueous solution of ferrous sulphate in an acidic medium?

The dissociation constants of a diacid HA are $K_{a1} = 6 \times 10^{-2}$ and $K_{a2} = 6 \times 10^{-5}$. The pH of 0.011 M $HA$ solution is 2.0. What is the value of $\left[\frac{{A}^-}{{HA}}\right]$?

The number of –OH groups in open chain and ring structures of D-glucose are respectively

Which of the following are present in DNA?

At STP $x$ g of a metal hydrogen carbonate (MHCO$_3$) (molar mass $84 \, {g/mol}$) on heating gives CO$_2$, which can completely react with $0.02 \, {moles}$ of MOH (molar mass $40 \, {g/mol}$) to give MHCO$_3$. The value of $x$ is:

p-Methyl benzene nitrile can be prepared from which of the following?

At $ T(K) $, two liquids A and B form an ideal solution. The vapour pressures of pure liquids A and B at that temperature are 400 and 600 mm Hg respectively. If the mole fraction of liquid B is 0.3 in the mixture, the mole fractions of A and B in vapour phase respectively are:

Identify the incorrect set from the following:

Which of the following is correct statement?

Aniline on direct nitration at 288 K gives 51% (A), 47% (B) and 2% (C). ‘B’ on diazotisation, followed by reaction with CuCN | KCN gives a compound X. The percentage of nitrogen in X is:

Which complex among the following is most paramagnetic?

At 300 K, for the reaction, \[ \text{A}_2 \text{B}_2(g) \rightleftharpoons \text{A}_2(g) + \text{B}_2(g) \]
$\text{is 100 mol L}^{-1}$. $\text{What is its } K_p \text{(in atm)} \text{at the same temperature?} $
$\text{(R = 0.082 L atm mol}^{-1}$ $\text{K}^{-1}) $

What are X and Y respectively in the following reactions?

A mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction. The hydrocarbon which will not be formed is:

The number of molecules having one lone pair of electrons on the central atom is from the following list: SnCl$_2$, XeF$_6$, SO$_3$, ClF$_3$, BrF$_5$, H$_2$O, XeO$_3$.

Arrange the following in the correct order of their acidic strength: I. $ \text{C}_6 \text{H}_4 (\text{OH}) $ (I) II. $ \text{C}_6 \text{H}_5 (\text{OH}) $ (II) III. $ \text{C}_6 \text{H}_4 (\text{NO}_2)(\text{OH}) $ (III) IV. $ \text{C}_6 \text{H}_4 (\text{NO}_2)(\text{OH}) $ (IV)

The correctly matched set of the following is:

What are the variables in the graph of powder diffraction pattern of a crystalline solid?

The equilibrium constant for the dissociation of HI at 773 K is: