List of top Questions asked in AP EAMCET

Which one of the following alkaline earth metals does not form hydride when it is heated with hydrogen directly?
Which of the following when added to 20 mL of a 0.01 M solution of HCl would decrease its pH?
In the given structure of Diborane, \( \theta_1, \theta_2 \) are respectively:
structure of Diborane, θ1, θ2
In which of the following sets, allotropes of carbon are correctly matched with their uses?
A, B, C, and D are some compounds. The enthalpy of formation of A(g), B(g), C(g), and D(g) is 9.7, -110, 81, and -393 kJ mol\(^{-1}\) respectively. What is \( \Delta H \) (in kJ mol\(^{-1}\)) for the reaction: \[ A(g) + 3B(g) \rightarrow C(g) + 3D(g) \]
A, B, C and D are some compounds. The enthalpy of formation of A(g), B(g), C(g) and D(g) is 9.7, -110, 81 and -393 kJ mol\(^{-1}\) respectively. What is \( \Delta H \) (in kJ mol\(^{-1}\)) for the given reaction? \[ A(g) + 3B(g) \rightarrow C(g) + 3D(g) \]
In which of the following cases, there is no change in hybridization of the central atom?
At 240.55 K, for one mole of an ideal gas, a graph of \( P \) (on y-axis) and \( V^{-1} \) (on x-axis) gave a straight line passing through the origin. Its slope (m) is 2000 J mol\(^{-1}\). What is the kinetic energy (in J mol\(^{-1}\)) of the ideal gas?
In which of the following sets, the sum of bond orders of the three species is maximum?
What is the enthalpy change (in J) for converting 9 g of H\(_2\)O (l) at \( +10^\circ C \) to H\(_2\)O (l) at \( +20^\circ C \)? Given \( C_p \) of water = 75 J/mol K and density of water = 1 g/mL.
If the longest wavelength of the spectral line of the Paschen series of \( \text{Li}^{2+} \) ion spectrum is \( x \) Å, then the longest wavelength (in Å) of the Lyman series of the hydrogen spectrum is:
The half-life period of a radioactive element A is 62 years. It decays into another stable element B. An archaeologist found a sample in which A and B are in 1 : 15 ratio. The age of the sample is:
Four logic gates are connected as shown in the figure. If the inputs are \( A = 0, B = 1, C = 1 \), then the values of \( y_1 \) and \( y_2 \) respectively are:
Four logic gates are connected
Which of the following sets of elements is not correctly arranged according to the given property?
The current gain of a transistor in a common emitter configuration is 80. The resistances in collector and base sides of the circuit are 5 k$\omega$ and 1 k$\omega$ respectively. If the input voltage is 2 mV, the output voltage is:
If \( v_0 \) is the threshold frequency of a metal X, the correct relation between de Broglie wavelength \( \lambda \) associated with a photoelectron and frequency \( v \) of the incident radiation is:
The maximum distance between the transmitting and receiving antennas for satisfactory communication in line of sight mode is 57.6 km. If the height of the receiving antenna is 80 m, the height of the transmitting antenna is (Radius of Earth = \( 6.4 \times 10^6 \) m):
The surface of a metal is first illuminated with a light of wavelength 300 nm and later illuminated by another light of wavelength 500 nm. It is observed that the ratio of maximum velocities of photoelectrons in two cases is 3. The work function of the metal value is close to:
The ratio of the minimum wavelength of the Balmer series to the maximum wavelength in the Brackett series in the hydrogen spectrum is:
The structure of solids is investigated by using:
One bar magnet is in simple harmonic motion with time period \( T \) in an earth’s magnetic field. If its mass is increased by 9 times, the time period becomes:
A coil of inductance \( L \) is divided into 6 equal parts. All these parts are connected in parallel. The resultant inductance of this combination is:
A 50 Hz AC circuit has a 10 mH inductor and a 2 $\omega$ resistor in series. The value of capacitance to be placed in series in the circuit to make the circuit power factor unity is:
Two toroids with number of turns 400 and 200 have average radii respectively 30 cm and 60 cm. If they carry the same current, the ratio of magnetic fields in these two toroids is:
Three rings, each with equal radius \( r \), are placed mutually perpendicular to each other and each having centre at the origin of the coordinate system. If \( I \) is the current passing through each ring, the magnetic field value at the common centre is:
Three rings, each with equal radius