List of top Questions asked in VITEEE

Which of the following tests is positive for the given compound [A]? 
tests is positive
The reaction 
Gattermann-Koch reaction
\(PCl_{5}\) is dissociating 50% at 250°C at a total pressure of \( P \) atm. If the equilibrium constant is \( K_p \), then which of the following relation is numerically correct?
How many electrons are involved in the following redox reaction? \[ \text{Cr}_2\text{O}_7^{2-} + \text{Fe}^{2+} + \text{C}_2\text{O}_4^{2-} \rightarrow \text{Cr}^{3+} + \text{Fe}^{3+} + \text{CO}_2 \quad (\text{Unbalanced}) \] 
 
The decreasing order of reactivity towards dehydrohalogenation (\(E_1\)) reaction of the following compounds is: 
decreasing order
 
For which one of the following sets of four quantum numbers, an electron will have the highest energy? 
quantum numbers
Phenol does not undergo nucleophilic substitution reaction easily due to:
Specific conductance of 0.1 M HNO\(_3\) is \(6.3 \times 10^{-2} \, \text{ohm}^{-1} \, \text{cm}^{-1}\). The molar conductance of the solution is:
How many conformations are possible for ethane?
The greater the valence of the flocculating ion added, the greater is its power to cause precipitation of a colloid. This rule is:
The acidic, basic and amphoteric oxides, respectively, are:
A long straight wire of circular cross-section (radius \( a \)) is carrying a steady current \( I \). The current \( I \) is uniformly distributed across this cross-section. The magnetic field is:
The resistivity (\( \rho \)) of a semiconductor varies with temperature. Which of the following curves represents the correct behavior? resistivity ( ρ ρ) of a semiconductor varies with temperature
Two objects A and B are placed at 15 cm and 25 cm from the pole in front of a concave mirror having radius of curvature 40 cm. The distance between images formed by the mirror is:
A small ball of mass \( M \) and density \( \rho \) is dropped in a viscous liquid of density \( \rho_0 \). After some time, the ball falls with a constant velocity. What is the viscous force on the ball?
A cylinder of fixed capacity of 44.8 litres contains helium gas at standard temperature and pressure. The amount of heat needed to raise the temperature of gas in the cylinder by 20.0°C will be:
The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately:
A current of 10 A exists in a wire of cross-sectional area of \( 5 \times 10^{-6} \, \text{m}^2 \) with a drift velocity of \( 2 \times 10^{-3} \, \text{m/s} \). The number of free electrons in each cubic meter of the wire is:
When unpolarized light is incident at an angle of 60° on a transparent medium from air, the reflected ray is completely polarized. The angle of refraction in the medium is:
The waves emitted when a metal target is bombarded with high energy electrons are:
In the circuit shown, find \( C \) if the effective capacitance of the whole circuit is to be 0.5 \(\mu F\). All values in the circuit are in \(\mu F\). 
effective capacitance
Two parallel, long wires are kept 0.20 m apart in vacuum, each carrying current of \( x \) A in the same direction. If the force of attraction per meter of each wire is \( 2 \times 10^{-6} \, \text{N} \), then the value of \( x \) is approximately:
The output \( Y \) of the following logic circuit for given inputs is: 
logic circuit
If you are provided a set of resistances $2 \, \Omega$, $4 \, \Omega$, $6 \, \Omega$, and $8 \, \Omega$. Connect these resistances so as to obtain an equivalent resistance of \(\frac{46}{3}  \Omega.\)
The refractive index \( \mu \) of the material of a prism is given by: % Formula for Refractive Index \[ \mu = \frac{\sin \left( \frac{A + \delta_m}{2} \right)}{\sin \left( \frac{A}{2} \right)} \] where \( A \) is the apex angle of the prism and \( \delta_m \) is the angle of minimum deviation.