List of practice Questions

What is X in the following reaction?
A compound \( M X \) has cubic close packing (ccp) arrangement of \( X \). Its unit cell structure is shown below. The empirical formula of the compound is
What is Z in the following sequence of reactions? \[ \text{Phenol} \xrightarrow{\text{Zn dust}} \text{CH}_6 \xrightarrow{\text{Alkaline KMnO}_4} Z \]
Which of the following oxy-acids has the maximum number of hydrogens directly attached to phosphorus?
On a smooth plane surface (figure) two block A and B are accelerated by up by applying a force 15 N. If mass of B is twice that of A, the force on B is
A potentiometer wire, 10 m long, has a resistance of 400 \( \Omega \). It is connected in series with a resistance box and a 2 V storage cell. If the potential gradient along the wire 0.1 m is V/cm, the resistance unplugged in the box is
A prism has a refracting angle of 60°. When placed in the position of minimum deviation, it produces a deviation of 30°. The angle of incidence is
Transfer characteristics (output voltage \( V_o \) vs input voltage \( V_i \)) for a base biased transistor in CE configuration is as shown in the figure. For using the transistor as a switch, it is used
A bar magnet of magnetic moment \( M \), is placed in a magnetic field of induction \( B \). The torque exerted on it is
Schottky defect in crystals is observed when
The cyclobutyl methylene with nitrous acid gives
Graph of specific heat at constant volume for a monatomic gas is
A charge \( +q \) is at a distance \( L/2 \) above a square of side \( L \). Then what is the flux linked with the surface?
The potential energy of a system increases if work is done
Two capacitors when connected in series have a capacitance of 3 μF, and when connected in parallel have a capacitance of 16 μF. Their individual capacities are
Resonance frequency of LCR series a.c. circuit is \( f_0 \). Now the capacitance is made 4 times, then the new resonance frequency will become
If the light is polarised by reflection, then the angle between reflected and refracted light is
The velocity of efflux of a liquid through an orifice in the bottom of the tank does not depend upon
An electron makes a transition from an excited state to the ground state of a hydrogen-like atom. Then
An A.C. source is connected to a resistive circuit. Which of the following is true?
A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohms) of necessary shunt will be
In Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is \( \frac{\lambda}{4} \), will be
Which of the following is a self-adjusting force?
Which of the following are not electromagnetic waves?
An alternating voltage of 220 V, 50 Hz frequency is applied across a capacitor of capacitance 2 μF. The impedance of the circuit is