List of top Questions asked in TS EAMCET

The coefficient of performance of a refrigerator is 5. If it is placed in a room at a temperature of 39°C, the temperature inside the refrigerator is:
The initial and the final temperatures of a black body are $27^\circ C$ and $177^\circ C$ respectively. The increase in the amount of radiation emitted per second is:
A wooden cube is floating in a bucket of water with \(\frac{3}{4}\) of its volume immersed. If this bucket with the wooden block is now placed in a lift moving down with an acceleration of \(\frac{g}{2}\), the fraction of volume of the wooden cube immersed in water is:
A soap bubble is given a negative charge. The pressure inside the bubble:
A copper wire of cross-sectional area 0.01 cm\(^2\) is subjected to a tension of 22 N. If Young’s modulus and Poisson’s ratio of copper are \(1.1 \times 10^{11}\) Nm\(^2\) and 0.32 respectively, then the change in the cross-sectional area of the wire is:
A body weighs the same on the surfaces of two planets of densities \( p_1 \) and \( p_2 \). The ratio of the radii of the planets is:
The amplitude of a damped harmonic oscillator becomes \( \frac{1}{n} \) times its initial amplitude \( A_0 \) at the end of 20 oscillations. The amplitude of the oscillator when it completes 40 oscillations is:
A thin circular ring of mass 0.2 kg is rotating about its axis with an angular speed of 51 rad/s. Two particles having mass 2 g each are now attached at diametrically opposite points on the ring. Then the angular speed of the system is:
Four bodies of masses 8 kg, 2 kg, 4 kg and 2 kg are placed at the four corners A, B, C and D respectively of a square ABCD of diagonal 80 cm. The distance of the center of mass of the system from the corner A is:
A body of mass 3 kg is thrown vertically upward from the ground with a velocity of \( 10 \, \text{ms}^{-1} \). If the maximum height reached by the body is 4.7 m, then the loss of energy due to air resistance is:
A block enters a rough horizontal surface with a speed of \( 6 \, \text{ms}^{-1} \) at \( x = 1.5 \, \text{m} \) and leaves the rough horizontal surface with a speed of \( 4 \, \text{ms}^{-1} \) at \( x = 2.5 \, \text{m} \). If the retarding force acting on the block is \( F = -25x \, \text{N} \) (where \( F \) is in newton and \( x \) is in meter), then the mass of the block is:
A body of mass 10 kg is kept on a rough horizontal surface. If the force applied on the body is increased by 80 N, then the acceleration of the body increases by:
Assertion (A): Silicones are used in surgical and cosmetic plants Reason (R): Silicones have high thermal stability
Identify the reaction in which hydrogen gas is not liberated
The products formed in the reaction of \( BeCl_2 \) with \( LiAlH_4 \) are
Identify the correct statements from the following: I. \( H_2O_2 \) oxidizes PbS to \( PbSO_4 \)
II. \( H_2O_2 \) is used in the industrial preparation of sodium perborate
III. \( H_2O_2 \) is insoluble in water
The electron gain enthalpy (in kJ/mol) of oxygen, sulphur, selenium respectively are
Identify the correct statements from the following: I. Conjugate base of chloric acid is \( ClO^- \)
II. \( AlCl_3 \) is a Lewis acid
III. Conjugate base of \( NH_3 \) is \( NH_2^- \)

At T(K), the following graph is obtained for an ideal gas.

Which of the following graphs correctly represents the work done on the gas (shaded part)?

A hydrocarbon has 85.7% of carbon by weight. 56 g (2 moles) of hydrocarbon was completely burnt in oxygen and obtained \( CO_2 \) and \( H_2O \). What is the weight (in g) of \( CO_2 \) formed? - (C = 12 u, H = 1 u, O = 16 u)

What is the correct equation that relates kinetic energy (\(E_{\text{ke}}\)) and pressure (\(P\)) of one mole of an ideal gas? - (V = Volume)
Identify the number of molecules having permanent dipole moment from the following: $$ CCl_4, NF_3, H_2S, HBr, SF_4, SiF_4, XeF_4, BeCl_2, SnCl_2, BrF_5, SO_2 $$
Among the following, the molecule in which all atoms obey the octet rule is

The following orbital energies (\(E\)) are compared. Identify the correct sets 

(I) E2(H) = E2(H)
(II) E3(H) = E3(He)
(III) E2s(H) < E2s(He)
(IV) E3s(He) < E3s(H)

The momentum of an electron is \(6.625 \times 10^{-28} \, kg \cdot ms^{-1}\). What is its wavelength in nm? - (Given: \( h = 6.625 \times 10^{-34} \, J \cdot s\))