List of practice Questions

The refractive index of a particular material is $1.67$ for blue light, $1.65$ for yellow light and $1.63$ for red light. The dispersive power of the material is .........
In an orbital motion, the angular momentum vector is
Two parallel beams of positrons moving in the same direction will
The first step in dark reaction of photosynthesis is
The distance between the ends of wings of an aeroplane is $5\, m$. The aeroplane is moving with velocity of $200\, km/sec$ in a magnetic field of $10\, T.$ The emf induced across the ends of wings will be:
Which one of the following pairs is not correctly matched
When a fresh water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will
In the somatic cell cycle

Using anhydrous AlCl3 as catalyst, which one of the following reactions produces ethylbenzene (PhEt)

The molecular formula of diphenylmethane How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom
A solid compound 'X' on heating gives CO2 gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of CO2 through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is
Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine
Among K, Ca Fe and Zn, the element which can form more than one binary compound with chlorine is
The enzyme which hydrolysis triglycerides to fatty acids and glycerol is called
The helical structure of protein is stabilized by
Which one of the following structures represents the peptide chain
A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be:
A galvanometer of 50 ohm resistance has 25 divisions. A current of 4 × 10–4 ampere gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of

Five equal resistances each of resistance R are connected as shown in the Figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be

A battery of V volts is connected between A and B

A battery is charged at a potential of 15V for 8 hours when the current flowing is 10A. The battery on discharge supplies a current of 5A for 15 hours. The mean terminal voltage during discharges is 14 V. The "Watt-hour" efficiency of the battery is
The coefficient of static friction, µs, between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move ? The string and the pulley are assumed to be smooth and massless.
block A of mass 2 kg and the table
The output of OR gate is 1
In a p–n junction photocell, the value of the photo electromotive force produced by monochromatic light is proportional to
A wheel having moment of inertia 2 kg–m2 about its vertical axis, rotates at the rate of 60 rpm about the axis. The torque which can stop the wheel's rotation in one minute would be 
A block of mass m is placed on a smooth wedge of inclination θ. The whole system is accelerated horizontally so that the block does not slip on the wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be