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List of top Questions asked in EAMCET

Which one of the following reactions occur at the cathode?
Which one of the following reactions is an example of auto-catalysis?
Identify Bronsted-Lowry acids in the reaction given. $ \underset{(A)}{\mathop{{{[Al{{({{H}_{2}}O)}_{2}}]}^{3+}}}}\,+\underset{(B)}{\mathop{HCO_{3}^{-}}}\,\underset{(C)}{\mathop{{{[Al{{({{H}_{2}}O)}_{5}}(O{{H}^{-}})]}^{2+}}}}\, $ $ \underset{(D)}{\mathop{+{{H}_{2}}C{{O}_{3}}}}\, $ The correct answer is
The rate constant of a first order reaction is $ 0.0693\,{{\min }^{-1}}. $ What is the time (in minutes) required for reducing an initial concentration of $ \text{20}\,\text{mol}\,{{\text{L}}^{-1}} $ to $ \text{2}\text{.5}\,\text{mol}\,{{\text{L}}^{-1}} $ ?
The cell potential of the following cell at $ \text{25}{{\,}^{\text{o}}}\text{C} $ (in volts) is $ \underset{(1\,atm)}{\mathop{(pt){{H}_{2}}}}\,\left| \underset{(0.01M)}{\mathop{{{H}^{+}}}}\, \right|\left| \underset{0.1\,M}{\mathop{C{{u}^{2+}}}}\, \right|Cu $ $ (E_{C{{u}^{2+}}|Cu}^{o}=0.337\,V) $
$ \text{100}\,\text{c}{{\text{m}}^{\text{3}}} $ of $ \text{0}\text{.1 M HCl} $ and $ \text{100}\,\text{c}{{\text{m}}^{\text{3}}} $ of 0.1 M $ \text{NaOH} $ solutions are mixed in a calorimeter. If the heat liberated is "Q" kcal, the heat of neutralisation $ \text{( }\!\!\Delta\!\!\text{ H)} $ (in kcal) of $ \text{HCl(aq)} $ and $ \text{NaOH(aq)} $ is
A girl swings on a cradle in sitting position. If she stands, the time period of cradle
$ \text{A(g)}\xrightarrow{{}}\text{B(g)} $ is a first order reaction. The initial concentration of A is $ \text{0}\text{.2}\,\text{mol}\,{{\text{L}}^{-1}}. $ After 10 min, the concentration of B is found to be $ \text{0}\text{.18}\,\text{mol}\,{{\text{L}}^{-1}}. $ The rate constant $ (in\,mi{{n}^{-1}}) $ for the reaction is
$ {{C}_{2}}{{H}_{5}}OH+SOC{{l}_{2}}\xrightarrow{Pyridine}X+Y+Z, $ in this reaction X, Y and Z respectively, are
Circular disc of mass 2 kg and radius 1 m is rotating about an axis perpendicular to its plane and passing through its centre of mass with a rotational kinetic energy of 8 J. The angular momentum in (J-s) is
The object at rest suddenly explodes into three parts with the mass ratio 2:1:1. The parts of equal masses move at right angles to each other with equal speeds. The speed of the third part after the explosion will be
A two litre glass flask contains some mercury. It is found that at all temperatures the volume of the air inside the flask remains the same. The volume of the mercury inside the flask is ( $ \alpha $ for glass $ =9\times {{10}^{-6}}/C,\gamma $ for mercury $ =\text{ }1.8\times {{10}^{-4}}/{}^\circ C $ )
A man is walking due east at the rate of 2 km/h. The rain appears to him to come down vertically at the rate of 2 km/h. The actual velocity and direction of rainfall with the vertical respectively are
A body cools from $ 70{}^\circ C $ to $ 50{}^\circ C $ in 5 min. Temperature of surroundings is $ 20{}^\circ C $ . Its temperature after next 10 min is
A body of mass 10 kg is lying on a rough plane inclined at an angle of 30? to the horizontal and the coefficient of friction is 0.5. The minimum force required to pull the body up the plane is

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : A ball connected to a string is in circular motion on a frictionless horizontal table and is in equilibrium. 

Reason (R): Magnitude of the centripetal force is equal to the magnitude of the tension in the string. 

In the light of the above statements, choose the correct answer from the options given below
 

The apparent weight of a person inside a lift is w1 when lift moves up with a certain acceleration and is w2 when lift moves down with same acceleration. The weight of the person when lift moves up with constant speed is
Given two vectors $ A\to =-\widehat{i}+2\widehat{j}-3\widehat{k} $ and $ B\to =4\widehat{i}+2\widehat{j}-6\widehat{k}. $ . The angle made by $ (A\to +B\to ) $ with x-axis is
A block of mass 2 kg is placed on the surface of a trolley of mass 20 kg which is on a smooth surface. The coefficient of friction between the block and the surface of the trolley is 0.25. If a horizontal force of 2 N acts on the block, the acceleration of the system in $ m{{s}^{-2}} $ is $ (g=10m{{s}^{-2}}) $
A sphere of mass m moving with constant velocity $ \mu $ , collides with another stationary sphere of same mass. If e is the coefficient of restitution, the ratio of the final velocities of the first and second spheres is
Two rods of different materials with coefficients of linear thermal expansion $ {{\alpha }_{1}},{{\alpha }_{2}} $ and Youngs moduli Y1 and Y2 respectively are fixed between two rigid walls. They are heated to have the same increase in temperature. If the rods do not bend and if 0.1 : a: = 2: 3, then the thermal stresses developed in the two rods will be equal when $ {{Y}_{1}}:{{Y}_{2}} $ is equal to
The radius of gyration of a rod of length L and mass M about an axis perpendicular to its length and passing through a point at a distance L/3 from one of its ends is
If force (F), work (W) and velocity (v) are taken as fundamental quantities, then the dimensional formula of time (T) is
A body of mass 2 kg is thrown up vertically with kinetic energy of 490 J. If $ g=9.8\text{ }m/{{s}^{2}}, $ the height at which the kinetic energy of the body becomes half of the original value, is
A p-n-p transistor is said to be in active region of operation, when:

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