AP EAPCET 2023 - 15th May Evening Shift

\(\text { Which of the following reaction is not feasible? }\)

Which of the following has more $\mathrm{p} K_a$ value?

The de Broglie wavelength of an electron travelling with $20 \%$ of velocity of light is
\(\left(h=6.626 \times 10^{-34} \mathrm{Js} ; m_e=9.1 \times 10^{-31} \mathrm{~kg}\right)\)

Which of the following electron arrangement does not obey Hund's rule?

In nucleoside, the base is attached to which position of sugar molecule?

Vinegar and butter are the sources for which of the following carboxylic acids respectively?

$$ \begin{aligned} &\text { Identify } X, Y \text { and } Z \text { in the following reactions sequence }\\ &\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH} \xrightarrow{X} \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{C...

Which of the following is not the property of covalent substances?

\(\text { Which of the following sets is correct? }\)



Molecule
Hybridisation
Geometry
Number of lone pairs of electrons on central atom


I



SiH

4




SiH

4

SiH_(4)

s

p
3
...

At $T(\mathrm{~K})$, the equilibrium constant for the reaction $a A(g) \rightleftharpoons b B(g)$ is $K_c$. If the reaction takes place in the following form $2 a A(g) \rightleftharpoons 2 b B(g)$, its equilibrium constant is $K^{\prime}{ }...

The rate constant, $k$ of a zero order reaction $2 \mathrm{NH}_3(g) \xrightarrow[1130 \mathrm{~K}]{\mathrm{Pt}} \mathrm{N}_2(g)+3 \mathrm{H}_2(g)$ is $y \times 10^{-4} \mathrm{molL}^{-1} \mathrm{~s}^{-1}$. The rate of formation of hydrogen ...

ortho-sulphobenzimide is used as

Hypothyroidism is due to
[A.] high level of iodine in the diet.
[B.] enlargement of thyroid gland.
[C.] low levels of iodine in the diet.
[D.] increased levels of thyroxine.

Which of the following produces nitrogen gas after the reaction with nitrous acid?

Arrange the following in order of increasing number of unpaired electrons in them
i. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
ii. $\left[\mathrm{MnCl}_6\right]^{3-}$
iii. $\left[\mathrm{FeF}_6\right]^{3-}$
iv. $\left[\mathrm{Co}\left(...

\(\text { Match the following. }\)

Identify the correctly matched pairs,
i. TiO - pigment industry.
ii. $\mathrm{MnO}_2$ - dry battery cells.
iii. Cu/Ni alloy - UK 'copper' coins.

The number of Faradays required to completely deposit magnesium from 1 L of $0.1 \mathrm{M} \mathrm{MgCl}_2$ aqueous solution is

Two statements are given below.
Statement I Chlorobenzene on nitration gives 1-chloro-4-nitrobenzene as major product.
Statement II Chlorobenzene undergoes nitration slowly than benzene.
Identify the correct answer

In $\mathrm{S}_{\mathrm{N}} 2$ reaction, the carbon in the transition state is

Among the following, the correctly matched pair is

Observe the following solutions.
I. Black coffee
II. 0.2 M NaOH
III. Lemon juice
IV. Lime water
V. Human saliva
VI. Tomato juice
The number of solutions having pH range of $1-7$ and 7-14, in the above list, is respectively

What is the van't Hoff factor of ferric sulphate? (Assume $100 \%$ ionisation)

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

6 g of urea (molar mass $=60 \mathrm{~g} \mathrm{~mol}^{-1}$ ) and 9 g of glucose $\left(\right.$ molar mass $\left.=180 \mathrm{~g} \mathrm{~mol}^{-1}\right)$ were dissolved in 35 g of water. The mass per cent of urea and glucose is respec...

\(\text { Match the following. }\)


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The correct order of melting points of Al, Ga, In is

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

Among the following the correct statements are
I. Germanium exists only in traces.
II. $\mathrm{PbF}_4$ molecule is tetrahedral in shape.
III. $\mathrm{GeX}_2$ is more stable than $\mathrm{GeX}_4$.
The correct answer is

The correct order of covalent radii of $\mathrm{Si}, \mathrm{Ge}, \mathrm{Sn}$ is

The first ionisation enthalpies of $\mathrm{Na}, \mathrm{Mg}$ and Si are respectively 496, 737 and $786 \mathrm{~kJ} \mathrm{~mol}^{-1}$. What would be the first ionisation enthalpy of Al in $\mathrm{kJ} \mathrm{mol}^{-1}$ ?

In which of the following pairs the polymer is correctly matched with the forces possessed by them.
A. Neoprene - Weak intermolecular forces
B.Terylene - Hydrogen bonding
C. Polystyrene - Very weak intermolecular forces
D. Polythene - Hydro...

\(\text { Match the following. }\)


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In $A_x B_y$ crystal structure, $A$ atoms occupied all
Octahedral as well as tetrahedral voids and $B$ atoms are at fcc centres. What is the formula of compound $A_x B_y$.

At 300 K , one mole of a gas present in a 10 L flask exerted a pressure of 2.706 atm. What is its compressibility factor $(Z)$ ?
(Given $R=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$ )

At. $T(\mathrm{~K})$, equal weights of $\mathrm{H}_2, \mathrm{D}_2$ and $\mathrm{T}_2$ are present in closed vessel. The pressure exerted by this gaseous mixture is $p \mathrm{~atm}$. The ratio of partial pressure of $\mathrm{T}_2, \mathrm{...

The most effective coagulating agent for antimony sulphide sol is

The plot of $\log \frac{x}{m}$ ( $y$-axis) and $\log p$ ( $x$-axis) is a straight line inclined at an angle of $45^{\circ}$. When the intercept, $k$ is 10 and pressure is 0.3 atm the amount of solute in grams absorbed per gram of adsorbent ...

If the work done by 2 mol of an ideal gas during isothermal reversible expansion from 5 L to 50 L is -189.1 L atm at constant pressure, the temperature of the gas (in ${ }^{\circ} \mathrm{C}$ ) is

At 300 K the enthalpy change for the following reaction is $-2800 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
\(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6(s)+6 \mathrm{O}_2(g) \longrightarrow 6 \mathrm{CO}_2(g)+6 \mathrm{H}_2 \mathrm{O}(l)\)
What is...

If the points of contact of the tangents drawn from $(0,0)$ to the curve $y=x^2+3 x+4$ are $(\alpha, \beta)$ and $(\gamma, \delta)$, then $\beta+\delta=$

If $(2, a)$ and $(b, 19)$ are two stationary points of the curve $y=2 x^3-15 x^2+36 x+c$, then $a+b+c=$

If the angle between the curves $y=e^{2(1+x)-4}$ and $x^2 y=1$ at the point $(1,1)$ is $\theta$, then $|\sin \theta|+|\cos \theta|=$

The area (in sq units) of the region bounded by the curves $y=4|\cos x|$ and $y=-|\cos x|$ from $x=-\frac{\pi}{2}$ to $\frac{\pi}{2}$ is

The coefficient of the highest power of $x$ in the expansion of $\left(x+\sqrt{x^2-1}\right)^8+\left(x-\sqrt{x^2-1}\right)^8$ is

If $C_j={ }^n C_j$, then $C_0 C_r+C_1 C_{r+1}+C_2 C_{r+2}+\ldots+C_{n-r} C_n=$

Let $A(1,2)$ be the centre and 3 be the radius of a circle $S$. Let $B(-1,-1)$ be the centre and $r$ be the radius of another circle $S^{\prime}$. If $\frac{\pi}{3}$ is the angle between the circles $S$ and $S^{\prime}$, then the number of ...

The distance between the centres of similitude of the circles $x^2+y^2+6 x-8 y+16=0$ and $x^2+y^2-2 x-2 y+1=0$ is

If $P\left(\frac{\pi}{3}\right)$ and $Q\left(\frac{2 \pi}{3}\right)$ represent two points on the circle $x^2+y^2-4 x+6 y-12=0$ in parametric form, then the length of the chord $P Q$ is

Let $A(2,3), B(3,-1)$ and $C(-3,2)$ be three points. If the centre of the circle passing through $A, B$ and $C$ is $(h, k)$, then $2 k-4 h=$