AP EAPCET 2021 - 20th August Evening Shift

Identify the best suitable reagent for the following reaction.

A subshell \(n=3, l=2\) can accommodate maximum of

If the work function for the photoelectron
emission of a metal is 3.75 eV, then the
threshold wavelength of the radiation needed
for the ejection of the electron is
approximately

With increasing principal quantum number, the energy difference between adjacent energy levels in \(\mathrm{H}\)-atom ............ .

The human body does not produce

A covalent molecule '\(X Y^{\prime}\)' is found to have a dipole moment of \(1.5 \times 10^{-29} \mathrm{C} \cdot \mathrm{m}\) and \(a\) bond length of \(150 ~\mathrm{pm}\). The percent ionic character of the bond will be

The hybridisation of \(\mathrm{Se}\) in \(\mathrm{SeF}_4\) and its geometry respectively are :

Incorrect matching amongst the following is (according to geometry of molecules)

The element with maximum bond energy is

For a \(A+B \rightarrow\) products, the rate of the reaction is given by rate \(=k[A][B]^2\). The units of rate constant \((k)\) will be

For an elementary reaction, \(X(g) \longrightarrow Y(g)+Z(g)\), the \(t_{1 / 2}\) is \(10 \mathrm{~min}\). In what period of time would the concentration of \(X\) be reduced to \(10 \%\) of its original concentration?

Arrange the following bases in decreasing
order of basicity.
1. Aniline
2. o-nitroaniline
3. m-nitroaniline
4. p-nitroaniline

A purple coloured compound of manganese \((X)\) decomposes on heating to liberate oxygen and forms compounds of manganese \(Y\) and \(Z\). Compound \(Z\) reacts with \(\mathrm{KOH}\) in presence of potassium nitrate to give compound \(Y\). ...

Match the following columns and choose the
correct code.

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In the electrolysis of a CuSO\(_4\) solution, how
many grames of Cu are plated out on the
cathode, in the time that is required to
liberate 5.6 L of O\(_2\)(g), measured at 1 atm and
273 K, at the anode?

Identify the coldest region among the
following layers of atmosphere.

The major product of the following reaction
sequence is

Match the following columns.

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The pH of 0.1 M solution of acetic acid will be
[degree of dissociation of acetic acid is
0.0132]

Alcohols with molecular formula \(\mathrm{C}_n \mathrm{H}_{2 n+2} \mathrm{O}\) are isomeric with

If two liquids \(A\) and \(B\) form a minimum boiling azeotrope at some specific composition, then which statement among the following is correct?

The vapour pressure of a solvent decreased by
20 mm of Hg when a non-volatile solute was
added to the solvent. The mole fraction of the
solute in the solution is 0.5. What should be
the mole fraction of the solvent for the
decrease in the v...

\(\mathrm{H}_3 \mathrm{BO}_3\) or \(\mathrm{B}(\mathrm{OH})_3\) is considered as an acid because its molecule

Xenon best reacts with

The correct order of acidic character of the following is

In the following reactions (i) and (ii), the number of moles of chlorine gas released respectively are
(i) \(\mathrm{MnO}_2+4 \mathrm{HCl} \longrightarrow\)
(ii) \(\mathrm{KMnO}_4+16 \mathrm{HCl} \longrightarrow\)

The electronegativity of the given elements
increases in the order.

The first ionisation enthalpies of \(\mathrm{Mg}\) and \(\mathrm{Al}\) can be expected to be ............ .

Which of the following statements is/are correct?
1. Mercury is the only metal that exists as liquid at room temperature.
2. Among non-metals, carbon has the highest melting point.
3. Hydrogen is the most abundant element in the universe.
4...

The main constituent of enamel on the surface of teeth is

A metal crystallises with a fcc lattice, the edge of whose unit cell is \(x \mathrm{~pm}\). The diameter of this metal atom would be .............. pm.

If the volume of \(15.9 \mathrm{~g}\) of carbon tetrachloride is \(10 \mathrm{~mL}\), calculate its density.

\(0.63 \mathrm{~g}\) of oxalic acid is dissolved in order to obtain \(250 \mathrm{~cm}^3\) of its solution. Find the normality of this solution. [oxalic acid \(\left.(\mathrm{COOH})_2 \cdot 2 \mathrm{H}_2 \mathrm{O}\right]\)

\(7.8 \mathrm{~g}\) of a compound having molecular formula \(\mathrm{C}_6 \mathrm{H}_6\), on reacting with \(\mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3\) gives \(8.4 \mathrm{~g}\) of a product which has molecular formula $$\mathrm{C}_8 \...

The complete combustion of one mole of
benzene produces .......... grams of carbon
dioxide.

When the temperature of a gas is increased from \(30^{\circ} \mathrm{C}\) to \(930^{\circ} \mathrm{C}\), the root mean square speed of the gas would

Three flasks of equal volume contain \(\mathrm{CH}_4, \mathrm{CO}_2\) and \(\mathrm{Cl}_2\) gases respectively. They will contain equal number of molecules, if

Which statements among the following are correct?
1. Freundlich isotherm fails at high pressure of the gas.
2. \(\Delta H < 0\) for both physical and chemical adsorption.
3. Physical adsorption in non-selective.
4. Chemical adsorption is re...

When an ideal gas expands isothermally from \(5 \mathrm{~m}^3\) to \(10 \mathrm{~m}^3\) at \(25^{\circ} \mathrm{C}\) against a constant pressure of \(10^7 \mathrm{~Nm}^{-2}\), then the work done on the gas is

Find the approximate value of \((\Delta H-\Delta U)\) in \(\mathrm{Jmol}^{-1}\), for the formation of CO from its elements at \(298 \mathrm{~K} .\left(R=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}\right)\)

A spherical iron ball 10 cm in radius is coated
with a layer of ice of uniform thickness, which
melts at a rate of 50 cm\(^3\)
/min. When the
thickness of the ice is 15 cm, the rate at which
the thickness of ice decreases is ........ cm/min...

Find the minimum value of \(2x+3y\), when \(xy=6\).

The volume of a spherical balloon is increasing at the rate of \(30 \mathrm{~cm}^3\) per minute. Find the rate of change of surface area of the balloon, when its radius is \(6 \mathrm{~cm}\).

If \(g(x)=\frac{1}{6} f\left(3 x^2-1\right)+\frac{1}{2} f\left(1-x^2\right), \forall x \in R\), where \(f^{\prime \prime}(x) > 0, \forall x \in R\). Then, \(g(x)\) is increasing in the interval

If the function \(f(x)=2 x^3-9 a x^2+12 a^2 x+1\) attains its maximum and minimum at \(p\) and \(q\) respectively, such that \(p^2=q\), then \(a\) equals

The equation of the pair of straight lines parallel to \(x\)-axis and touching the circle \(x^2+y^2-6 x-4 y-12=0\) is

The points where the circle \(x^2+y^2-3 x -4 y+2=0\) cuts the \(X\)-axis are

The center and radius of the circle \(x^2+y^2+8 x+10 y-8=0\) respectively are and units

The poles of the tangents to the circle \(x^2+y^2=4\) with respect to the circle \((x+2)^2+y^2=8\), lie on

If the power of the point \((1,6)\) with respect to the circle \(x^2+y^2+4 x-6 y-a=0\) is \(-16\) then \(a\) equals