TS EAMCET 2020 (Online) 14th September Evening Shift

Reactions that produce $n$-butanol in the following are :
I. $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { (ii) } \mathrm{NaOH} / \mathrm{H}_2 \mathrm{O}_2]{\text { (i) } \mathrm{B}_2 \mathrm{H}_6}$
II. $\mathr...

An organic compound, ' $A$ ' with molecular formula $\mathrm{C}_8 \mathrm{H}_8 \mathrm{O}$ on reaction with $\mathrm{I}_2 / \mathrm{KOH}$ gives salt of carboxylic acid ' $B$ ' and a halo-compound ' $C$ '. Compound ' $C$ ' on the reaction wi...

\(\text { What are } X \text { and } Y \text { in the following reaction sequence? }\)

Given the ratio of kinetic energy of electron in two orbitals is $16: 9$. Calculate the ratio of wavelength of electron waves?

Which of the following results is not true about photoelectric effect?

Which of the following statements support the cyclic form for glucose?

(i) It doesn't give Schiff's test.
(ii) It is found to exist in two different crystalline forms.
(iii) It oxidises with nitric acid to give saccharic acid.
(iv) Pentaa...

\(\text { Predict } A \text { and } B \text { in the following reaction sequence : }\)
\(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{COOH}\)
$$ \xrightarrow[\text { Red phosphorus }]{\mathrm{Br}_2} A \xrightarrow{\ma...

What is the correct order of bond lengths in the following molecules?
I. $\mathrm{O}_2$
II. $\mathrm{O}_2^{+}$
III. $\mathrm{O}_2^{-}$
IV. $\mathrm{O}_2^{2-}$

Which one of the following compound is hypervalent?

For a given reaction, $2 A \rightleftharpoons B+C$, the equilibrium constant is $2 \times 10^{-3}$. If at any given time the composition of the reaction mixture is $[A]=[B]=[C]=6 \times 10^{-5} \mathrm{M}$; predict in which direction the re...

For a reversible reaction $A \rightleftharpoons B$, pre-exponential factor is same for both the forward and backward reactions and has value of $20 \mathrm{~S}^{-1}$. If the enthalpy change along the forward reaction is $-41.5 \mathrm{~kJ} ...

\(\text { The structure of paracetamol is }\)

The major product formed by the reaction of benzylamine with nitrous acid is

When $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$ is heated at $250^{\circ} \mathrm{C}$, the change in colour is from

Which compound is zero valent metal complex?

Trans uranium elements are

$\mathrm{Mg}^{2+}$ displaces hydrogen from acids but copper does not. A galvanic cell prepared by combining $\mathrm{Cu} / \mathrm{Cu}^{2+}$ and $\mathrm{Mg} / \mathrm{Mg}^{2+}$ has an EMF of 2.71 V at 298 K . If the potential of copper ele...

Acid rain is mainly caused by the emissions of which of the following gases?
I. Sulphur dioxide
II. Carbon dioxide
III. Nitrogen dioxide
IV. Methane

The order of circled $\mathrm{C}-\mathrm{H}$ bond dissociation energy in the following compound is

Arrange the following in the correct order of reactivity towards nucleophilic substitution reaction.
I. 1-chloro-2-nitrobenzene
II. Chlorobenzene
III. 1-chloro-3-nitrobenzene

Relative lowering of vapour pressure of a dilute solution is 0.5 . What is the mole fraction of the non-volatile solute?

The solubility product of a sparingly soluble $A B_2$ salt is $2.56 \times 10^{-4} \mathrm{M}^3$ at $25^{\circ} \mathrm{C}$. The $K_f$ of water is 1.8 K kg mol ${ }^{-1}$. The depression in freezing point of a standard solution of $A B_2$ i...

Which element does not exist in elemental state in the earth's crust?

Pick the correct statement.
I. Borax is white crystalline solid containing $\left[\mathrm{B}_4 \mathrm{O}_5(\mathrm{OH})_4\right]^{2-}$ units.
II. Aqueous solution of borax is acidic in nature.
III. Cobalt gives blue colour in borax bead te...

Which element does not show catenation property?

Phosphine is prepared by the reaction of $\mathrm{P}_4$ with which of the following?

The most stable form of sulphur allotrope is

Arrange the following ions in the correct order with respect to their ionic radii.

\(\text { The structure given below is an example of }\)
I. A condensation and biodegradable polymer.
II. A biodegradable and thermoplastic polymer.
III. A biodegradable and thermosetting polymer.
IV. A polyester and thermoplastic polymer...

During the course of estimating nitrogen using Kjeldahl's method, the organic compound is heated with

Which of the following statement(s) are correct, when alkali metals burn in the presence of oxygen?
I. Lithium forms monoxide
II. Sodium forms peroxide
III. Potassium, rubidium and cesium forms superoxide

At atmospheric pressure and very low temperature, water crystallises to

Intercepts of a plane in crystal is given by $a, b / 2,3 c$ in a simple cubic unit cell. The miller indices are

Given the ratio of amounts of nitrogen and oxygen in a particular gaseous mixture is $4: 1$. Calculate the ratio of number of their molecules?

Sulphuric acid reacts with sodium hydroxide as follows:
\(\mathrm{H}_2 \mathrm{SO}_4+2 \mathrm{NaOH} \longrightarrow \mathrm{Na}_2 \mathrm{SO}_4+2 \mathrm{H}_2 \mathrm{O}\)
What will be the amount of sodium sulphate formed, when l L of 0....

What is the ratio of kinetic energy of 7 grams of nitrogen and 4 grams of oxygen at $T(\mathrm{~K})$ ?

Equal amount of gases are kept in two separate containers. If densities of the two gases are in $1: 2$ ratio and their temperatures are in 2:1 ratio, calculate the ratio of their respective pressures.

Which of the following is true for spontaneous adsorption?

For the reactions,
$$ \begin{aligned} 2 \mathrm{Cl}(g) & \longrightarrow \mathrm{Cl}_2(g) \\ \mathrm{CO}_2(g) & \longrightarrow \mathrm{CO}(g)+\frac{1}{2} \mathrm{O}_2(g) \end{aligned} $$
What are the signs of $\Delta S$, respectively?

Which of the following statement is correct?

If $\alpha$ is a root of multiplicity 3 of the equation $x^5-8 x^4+25 x^3-38 x^2+28 x-8=0$, then $\alpha^2-5 \alpha+6=$

Let $f: R \rightarrow R$ be a bijection. A curve represented by $y=f(x)$ is such that $f^{\prime}(x)>0 \forall x \in \mathbf{R}$. The tangent and normal drawn at $P(\alpha, 1)$ on the curve cuts the $X$-axis at $A, B$ respectively and $C$ i...

The $x$-coordinate changes on the curve $y=3 x^5+15 x-8$ at the rate of $\frac{1}{5}$ units/sec. $A\left(x_1, y_1\right), B\left(x_2, y_2\right)$ are the points on the curve at which the $y$-coordinate changes at the rate of 6 units/sec, th...

In $\triangle A B C, \angle B=90^{\circ}$ and $(b+a)$ is always a constant. In order that $\triangle A B C$ encloses the maximum area, $\angle C=$

The angle $A$ of $\triangle A B C$ is found by measurement to be $67 \frac{1^{\circ}}{2}$ and the area of $\triangle A B C$ is calculated from the measurements of $b, c, A$. In measuring $A$, an error of 9 min is made then the percentage er...

The area (in sq. units) bounded by the parabola $y=x^2+3$, the tangent to the parabola at $(3,12)$ and the coordinate axes and lying in the first quadrant is

If $x$ is so small that all terms containing $x^2$ and higher powers of $x$ can be neglected, then the approximate value of $\frac{\left(1+\frac{2 x}{3}\right)^{-4}(4+5 x)^{1 / 2}}{(9+x)^{3 / 2}}$, when $x=\frac{6}{371}$, is

The sum of the coefficients of $x^{-3 / 2}$ and $x^3$ in the expansion of $\sqrt{3+x}+\sqrt{5+x}$ when $3 < x< 5$, is

The equations of the tangents drawn from the origin to the circle $x^2+y^2+2 g x+2 f y+g^2=0$ are

If $2 x+y=0$ is the equation of a chord of the circle $x^2+y^2-2 x-6 y+3=0$, then the circle with this chord as diameter passes through the point