List of top Questions asked in AP EAMCET

Let $ x $ grams of benzoic acid (molar mass = 122 g/mol$^{-1}$) be dissolved in 50 g of benzene. Its freezing point was found to be 277.82 K. What is the value of $ x $? (Given: $ K_f $ of benzene = 5.1 K kg mol$^{-1}$, freezing point of benzene = 278.45 K, and van't Hoff's factor of benzoic acid = 0.5)

At 298 K, the density of an aqueous solution containing 82 g of acetic acid per dm$^3$ is 1.01 kg dm$^{-3}$. If the molarity of the solution is $x$ M, the molality $m$ of the same solution is (molar mass of acetic acid = 60 g mol$^{-1}$):

X-ray diffraction studies show that a metal 'M' crystallises in an fcc unit cell with edge length of 400 pm. If the density of the metal is $7.5 \times 10^3 { kg/m}^{-3}$, the number of unit cells present in 0.015 kg of it is:

What is the percentage of carbon in the compound X, formed in the given sequence of reactions?

In Kjeldahl's method of estimation of nitrogen, the ammonia evolved from 0.2 g of an organic compound was absorbed in 60 mL of 0.1 M $H_2SO_4$. If 40 mL of 0.1 M NaOH is required for complete neutralisation of the unused acid, the percentage of nitrogen in the compound is:

If the mean of the data 7, 8, 9, 7, 8, 7, $\lambda$, 8 is 8, then the variance of the data:

Which one of the following pairs of gases does not represent the greenhouse gases?

Given are two statements regarding the properties of carbon in Group 14 of the periodic table:
Statement-I: Carbon has the highest catenation power in group 14 elements.
Statement-II: Carbon has small size and high electronegativity compared to other elements of group 14.

$BF_3 + LiAlH_4 \rightarrow X + LiF + AlF_3$. The incorrect statement about 'X' is:

The bicarbonate of which alkali metal does not exist as a solid?

The lattice of $MH_{2.55}$ is different from the lattice of $M$. What is $M$?

What is the conjugate base of $ OH^- $?

One mole of compound AB reacts with one mole of compound CD according to the equation: \[ {AB} + {CD} \rightleftharpoons {AD} + {CB} \] At equilibrium, it was found that $\frac{3}{4}$ mole of AB and CD had been converted to AD and CB. There is no change in volume. The equilibrium constant for the reaction is:

If $ AB = 2i + 3j - 6k $, $ BC = 6i - 2j + 3k $ are the vectors along two sides of a triangle ABC, then the perimeter of triangle ABC is:

Given the reaction at 300 K:

with $\Delta G^\circ = -15 \, kJ \, mol^{-1}$. Calculate the value of log $K$ for the reaction at the same temperature (R = 8.3 J $K^{-1} \, mol^{-1}$).

In $ \triangle ABC $, $ (r_2 + r_3) \csc^2 \frac{A}{2} =$

Given below are two statements regarding the use of a bomb calorimeter:
Statement-I: $\Delta U$ can be measured by bomb calorimeter.
Statement-II: Heat is not transferred from calorimeter to surroundings.

Observe the following reaction: \[ {H}_2{O}(s) + {F}_2(g) \rightarrow {HF}(g) + {HOF}(g) \] In this reaction, identify the correct redox changes.

'x' cm$^3$ of CH$_4$ gas diffused through a porous membrane in 25 min, Under the same conditions 'y' cm$^3$ of another gas of molar mass 64 g mol$^{-1}$ diffused in 20 min. The ratio of x and y is:

At $T$K, for one mole of an ideal gas, $P$, $V$ and ${v}_{rms}$ were measured. A graph of $({v}_{rms})^2$ (on y-axis) and $PV$ (on x-axis) goes straight line passing through origin. Its slope is $m$. What is its molar mass (in kg mol$^{-1}$)?

Which of the following orders are correct regarding their covalent bond character?
i. KF $<$ KI
ii. SnCl2 $<$ SnCl4
iii. NaCl $<$ CuCl

Identify the sets containing isostructural molecules from the following options:
i: ${SiF}_4$, ${CCl}_4$
ii: ${NF}_3$, ${XeO}_3$
iii: ${BeCl}_2$, ${HgCl}_2$
iv: ${SF}_4$, ${XeF}_4$

Match the following:

What is the radius of the second Bohr orbit of $ {He}^+ $ ion?

If $ 0<x<\frac{1}{2} $ and $ \alpha = \sin^{-1} x + \cos^{-1} \left(\frac{x}{2} +\frac{\sqrt{3} - 3x^2}{2} \right) $, then $ \tan \alpha + \cot \alpha = $: