List of top Questions asked in VITEEE

A and B are two metals with threshold frequencies \( 1.8 \times 10^{14} \, \text{Hz} \) and \( 2.2 \times 10^{14} \, \text{Hz} \). Two identical photons of energy \( 0.825 \, \text{eV} \) each are incident on them. Then photoelectrons are emitted by (Take \( h = 6.6 \times 10^{-34} \, \text{J.s} \)):

The potential of a large liquid drop when eight liquid drops are combined is 20V. Then the potential of each single drop was

The kinetic energy of an electron get tripled then the de-Broglie wavelength associated with it changes by a factor

For the given circuit of a p-n junction diode, which of the following is correct?

If the binding energy per nucleon in \( \text{Li}^7 \) and \( \text{He}^4 \) nuclei are respectively \( 5.60 \, \text{MeV} \) and \( 7.06 \, \text{MeV} \), then the energy of the reactor \[ \text{Li}^7 + p \to \text{He}^4 + 2e \] is

The graph between the square root of the frequency of a specific line of the characteristic spectrum of X-ray and the atomic number of the target will be

The threshold frequency for a photo-sensitive metal is \( 3.3 \times 10^{14} \, \text{Hz} \). If light of frequency \( 8.2 \times 10^{14} \, \text{Hz} \) is incident on this metal, the cut-off voltage for the photo-electric emission is nearly

The potential of the electric field produced by a point charge at any point \( (x, y, z) \) is given by \( V = x^2 + 5y^2 \), where \( x \), \( y \) are in meters and \( V \) is in volts. The intensity of the electric field at \( (-2, 1, 0) \) is

A resistor \( R \), an inductor \( L \), and a capacitor \( C \) are connected in series to an oscillator of frequency \( n \). If the resonant frequency is \( n_r \), then the current lags behind voltage when

A parallel plate capacitor has capacitance \( C \). If it is equally filled the parallel layers of materials of dielectric constant \( K_1 \) and \( K_2 \), its capacity becomes \( C_T \). The ratio of \( C_T \) and \( C \) is

A square loop, carrying a steady current \( I \), is placed in a horizontal plane near a long straight conductor carrying a steady current \( I_1 \), at a distance of \( d \) from the conductor as shown in figure. The loop will experience

Match List I (Equations) with List II (Types of process) and select the correct option.

Following compounds are given (i) $CH _{3} CH _{2} OH$ (ii) $CH _{3} COCH _{3}$ (iii) $CH _{3}- \underset{\overset{|}{C}H_3}{C}HOH$ (iv) $CH _{3} OH$ Which of the above compound(s) on being warmed with iodine solution and $NaOH$, will give iodoform?

The order of reactivity of phenyl magnesium bromide $(PhMgBr)$ with the following compounds

Three resistors $1\,\Omega , 2\,\Omega$ and $3\,\Omega $ are connected to form a triangle. Across $3\,\Omega$ resistor a $3\,V$ battery is connected. The current through $3\,\Omega$ resistor is

In a common emitter amplifier the input signal is applied across

Charge passing through a conductor of cross-section area $A=0.3 \,m ^{2}$ is given by $q=3 t^{2}+5 t+2$ in coulomb, where $t$ is in second. What is the value of drift velocity at $t=2 s ?$ (Given, $\left.n=2 \times 10^{25} / \,m ^{3}\right)$

The pressure exerted by $6.0 \,g$ of methane gas in a $0.03\, m ^{3}$ vessel at $129^{\circ} \,C$ is (Atomic masses: $C =12.01, \,H =1.01$ and $\left.R=8.314\, JK ^{-1} \,mol ^{-1}\right)$

Some of the properties of the two species, $NO _{3}^{-}$and $H _{3} O ^{+}$are described below. Which one of them is correct?

What is the value of electron gain enthalpy of $Na^+$ if $IE_1$ of $Na = 5.1 \,eV$ ?

Which has the maximum number of molecules among the following ?

In the following reaction, $C_6H_5CH_2Br \ce{->[{(i) \text{Mg,Ether}}][{(ii) H_3O^+}] X }$ the product ' $X$ ' is

Which of the following compound is the most basic ?

Fructose reduces Tollen's reagent due to

Which one of the following compounds will be most readily dehydrated ?