List of top Chemistry Questions asked in AP EAPCET

$P_4\text{O}_\text{10} \text{H}_2\text{O} \xrightarrow{\text{X}} \xrightarrow{\text{Y}} \text{The number of P-OH, P=O bonds in Y is respectively}$

Observe the following solutions \[ \text{I. Black coffee} \quad \text{II. 0.2M NaOH} \quad \text{III. Lemon juice} \quad \text{IV. Lime water} \quad \text{V. Human Saliva} \quad \text{VI. Tomato juice} \] The number of solutions having pH range of 1-7 and 7-14, in the above list, is respectively

34.2% (W/V) sucrose $ \left( \text{C}_6\text{H}_2\text{O}_1\right) $ solution is isotonic with 18% (W/V) of unknown solution X. Formula of X is

Which of the following in not correct?

Match the following:

Property	Expression
A. π	I. K_b · m
B. ΔT_f	II. K_f · m
C. ΔT_b	III. CST
D. (P⁰ - P) / P⁰	IV. (n₁ / (n₁ + n₂))

1.06 g of Na$_2$CO$_3$ (molar mass = 106 g mol$^{-1}$) is dissolved in 500 g water. What is its molality?

The number of moles of OH$^-$ ions present in 100 mL of 0.2 M Al(OH)$_3$ solution is (assume 100% dissociation)

An example of a network solid is:

Which of the following does not belong to an ideal solution?

Identify the reaction in which oxygen is not one of the products.

The weight percentage of C and H in a hydrocarbon is in the ratio of 4:1. What is its empirical formula?

Observe the following reaction \[ \text{a} \, \text{P}_4(s) + \text{b} \, \text{OH}^-(aq) + \text{H}_2\text{O}(l) \rightarrow \text{c} \, \text{PH}_3(g) + \text{d} \, \text{H}_2\text{PO}_4^-(aq) \] a, b, c and d are respectively

x g of methane was burnt completely in the presence of oxygen. The liberated gases were passed into a solution containing 370 g of Ca(OH)$_2$. The weight of white precipitate obtained was 500 g. What is the value of x (in g)? (Given : C = 12; H = 1; Ca = 40; O = 16 u)

Observe the following reaction \[ xS_8 (s) + yOH^-(aq) \to zS^{2-}(aq) + 2S_2O_3^{2-}(aq) + 6H_2O(l) \] x, y and z are respectively.

In neutral or faintly alkaline medium, ${MnO4^-}$ oxidizes ${I^-}$ to iodate. What is the number of moles of ${KMnO_4}$ required to completely convert 1 L of 0.5 M KI to iodate?

48 g of methane was completely burnt in the presence of oxygen. The liberated gas was passed into a solution containing 370 g of Ca(OH)$_2$. What is the weight (in g) of CaCO$_3$ formed?
(Atomic weights: C = 12, H = 1, Ca = 40, O = 16)

A first-order reaction has the rate constant of $1.15 \times 10^{-3} \, \text{s}^{-1}$. The time required to reduce 10 g of reactant to 6 g is $x \times 10^2$ sec. What is the approximate value of $x$?

Consider the reaction carried out at T(K):
$\text{A(g) + B(g) → C(g)}$
$\text{The rate law for this reaction is \(r = k[A]^2[B]^2$}\). The concentration of A in experiment 2 and rate in experiment 3 shown as $x$ and $z$ in the table. $x$ and $z$ are respectively:\[\begin{array}{|c|c|c|c|} \hline \text{Experiment} & [A]~(\text{mol L}^{-1}) & [B]~(\text{mol L}^{-1}) & \text{Initial rate (mol L}^{-1} \text{s}^{-1}) \\ \hline 1 & 0.05 & 0.05 & R \\ 2 & x & 0.05 & 2R \\ 3 & 0.20 & 0.10 & z\\ \hline \end{array}\]

If the standard enthalpy change ($\Delta H^o$) for reaction \[ \text{H}_2(g) + \text{Br}_2(l) \rightarrow 2 \text{HBr}(g) \] is $-72.8 \, \text{kJ}$, the standard enthalpy of formation ($\Delta H_f^o$) of $\text{HBr}(g)$ in $\text{kJ mol}^{-1}$ is:

At $ T(K) $, the equilibrium constant for $ A (g) \rightleftharpoons B (g) $ is $ 10^2 $. If the rate of forward reaction is 0.025 mol L$^{-1}$ s$^{-1}$, the rate of backward reaction (in mol L$^{-1}$ s$^{-1}$) is

20 mL of 0.1 M HCl is added to 30 mL of 0.1 M NaOH. To this solution, extra 50 mL of water was added. What is the molarity of the final solution formed?

The rate constant, $ k $, of a zero order reaction $ 2 \text{NH}_3 (g) \xrightarrow{P_{1130K}} \text{N}_2 (g) + 3 \text{H}_2 (g) $ is $ y \times 10^{-4} \, \text{mol} \, \text{L}^{-1} \, \text{s}^{-1} $. The rate of formation of hydrogen (in mol L$^{-1}$ s$^{-1}$) is

The molarity of the solution when 4.9 g of H$_2$SO$_4$ is dissolved in 250 mL of solution is

If the time required for 40% completion of a first order reaction is 50 minutes, what is the time required for completion of 80% of the same reaction?
($ \log 2 = 0.3010, \log 5 = 0.6990, \log 6 = 0.7782 $)

Given below are two statements
Assertion (A): A catalyst generally increases the rate of a reaction
Reason (R): It lowers the activation energy of a reaction by providing a new path