List of top Chemistry Questions asked in EAMCET

For the reaction $N _{2}( g )+ O _{2}( g ) \rightleftharpoons 2 NO ( g )$ the equilibrium constant is $K _{1}$. The equilibrium constant is $K _{2}$ for the reaction $2 NO ( g )+ O _{2}( g ) \rightleftharpoons 2 NO _{2}( g ) .$ What is $K$ for the reaction $NO _{2}( g ) \rightleftharpoons 1 / 2 N _{2}( g )+ O _{2}( g ) ?$

Parkinson's disease is linked to abnormalities in the levels of dopamine in the body. The structure of dopamine is

Aluminium reacts with NaOH and forms compound 'X'. If the coordination number of aluminium in 'X' is 6, the correct formula of X is

Dipole moments of HCI = 1.03 D, HI= 0.38 D. Bond length of $HCl = 1.3 \mathring{A}$ and $HI = 1.6 \mathring{A}$. The ratio of fraction of an electric charge, e existing on each atom in HCl and HI is

Lattice energy of an ionic compound depends upon

For a first order reaction at 27$^{\circ}$C, the ratio of time required for 75% completion to 25% completion of reaction is

Which one of the following order is correct for the first ionisation energies of the elements ?

The chemical entities present in thermosphere of the atmosphere

The volumes of two $ \text{HCl} $ solutions A(0.5 N) and B(0.1 N) to be mixed for preparing 2 L of 0.2 N HCl solution are

When 0.1 mole of an acid is added to 2 L of a buffer solution, the pH of the buffer decreases by 0.5. The buffer capacity of the solution is

AB is an ionic solid. If the ratio of ionic radii of $ {{\text{A}}^{\text{+}}} $ and $ {{\text{B}}^{-}} $ is 0.52, what is the coordination number of $ {{\text{B}}^{-}} $ ?

Which one of the following reactions is an example of auto-catalysis?

Which one of the following reactions occur at the cathode?

Identify Bronsted-Lowry acids in the reaction given. $ \underset{(A)}{\mathop{{{[Al{{({{H}_{2}}O)}_{2}}]}^{3+}}}}\,+\underset{(B)}{\mathop{HCO_{3}^{-}}}\,\underset{(C)}{\mathop{{{[Al{{({{H}_{2}}O)}_{5}}(O{{H}^{-}})]}^{2+}}}}\, $ $ \underset{(D)}{\mathop{+{{H}_{2}}C{{O}_{3}}}}\, $ The correct answer is

The rate constant of a first order reaction is $ 0.0693\,{{\min }^{-1}}. $ What is the time (in minutes) required for reducing an initial concentration of $ \text{20}\,\text{mol}\,{{\text{L}}^{-1}} $ to $ \text{2}\text{.5}\,\text{mol}\,{{\text{L}}^{-1}} $ ?

The cell potential of the following cell at $ \text{25}{{\,}^{\text{o}}}\text{C} $ (in volts) is $ \underset{(1\,atm)}{\mathop{(pt){{H}_{2}}}}\,\left| \underset{(0.01M)}{\mathop{{{H}^{+}}}}\, \right|\left| \underset{0.1\,M}{\mathop{C{{u}^{2+}}}}\, \right|Cu $ $ (E_{C{{u}^{2+}}|Cu}^{o}=0.337\,V) $

$ \text{100}\,\text{c}{{\text{m}}^{\text{3}}} $ of $ \text{0}\text{.1 M HCl} $ and $ \text{100}\,\text{c}{{\text{m}}^{\text{3}}} $ of 0.1 M $ \text{NaOH} $ solutions are mixed in a calorimeter. If the heat liberated is "Q" kcal, the heat of neutralisation $ \text{( }\!\!\Delta\!\!\text{ H)} $ (in kcal) of $ \text{HCl(aq)} $ and $ \text{NaOH(aq)} $ is

$ \text{A(g)}\xrightarrow{{}}\text{B(g)} $ is a first order reaction. The initial concentration of A is $ \text{0}\text{.2}\,\text{mol}\,{{\text{L}}^{-1}}. $ After 10 min, the concentration of B is found to be $ \text{0}\text{.18}\,\text{mol}\,{{\text{L}}^{-1}}. $ The rate constant $ (in\,mi{{n}^{-1}}) $ for the reaction is

$ {{C}_{2}}{{H}_{5}}OH+SOC{{l}_{2}}\xrightarrow{Pyridine}X+Y+Z, $ in this reaction X, Y and Z respectively, are

Which of the following can give a Grignard reagent when reacted with magnesium m dry ether?

Acidified $ \text{KMn}{{\text{O}}_{\text{4}}} $ oxidises oxalic acid to $ \text{C}{{\text{O}}_{2}}. $ What is the volume (in litres) of $ {{10}^{-4}}\text{M}\,\text{KMn}{{\text{O}}_{\text{4}}} $ required to completely oxidise 0.5 L of $ {{10}^{-2}}\text{M} $ oxalic acid in acid medium?

Match the following lists:

The bond angle in $ \text{As}{{\text{H}}_{\text{3}}} $ is greater than that in:

What is X in the following reaction? $ KHS{{O}_{4}}+{{F}_{2}}\xrightarrow{{}}HF+X $

What is the conjugate base of $ \text{HSO}_{4}^{-} $ ?