List of practice Questions

Find the change in the charge carriers of a p-n junction diode if its temperature is increased?
Who gave the theory of root pressure?
A Simple pendulum experiment is performed for the value of 'g',the acceleration due to the earth's gravity. The measured value of length of the pendulum is 25 cm with an accuracy of 1 mm and the measured time for 100 oscillations is found to be 100 sec with an accuracy of 1 sec. The percentage uncertainty in the determination of 'g' is:
Acceleration due to gravity at a height of H from the surface of a plane is the same as that at a depth of H below the surface.If R is the radius of the planet, then H vs. R graph for different planets will be
\(∫_0^1 (5xe^{2x}-tan(π/4)) dx=\)
A balloon starting from rest ascends from the ground with a uniform acceleration of 4 ft/sec2. At the end of 5 sec, a stone is dropped from it. If t be the time to reach the stone to the ground and H is the height of the balloon when the stone goes to the floor, Then
X-rays of wavelength λ get reflected from parallel planes of atoms in a crystal with spacing d between two planes as shown in the figure. If the two reflected beams interfare constructively,Then the condition for maxima will be(n is the order of interference fringe)
X-rays of wavelength λ get reflected from parallel planes
A six faced fair die is rolled for a large number of times. Then, the mean value of the outcome is 

If R -(α,β) is the range of  \(\frac{x+3}{(x-1)(x+2)}\) then the sum of the intercepts of the line ax + βy + 1 = 0 on the coordinate axes is:

Which of the following is least reactive towards Sn1 reactions?

The following molecule with the structure acts as

Ziegler-Natta Catalyst is used in the manufacture of

Match the following List -I (Complex) List II (Spin only Magnetic Moment)

 List -I (Complex)  List II (Spin only Magnetic Moment)
A) [CoF6]3-I)0
B) [Co(C2O4)3]3- II)√24
C)[FeF6]3+III)√8 
D)[Mn(CN)6]3-IV)√35
  V)√15

the correct answer is:

Among the following the incorrect statement about transition metals is

XeF4 + O2F2 → X + O2 
X + H2O → Y +2HF 
The shape of the molecules of X and Y respectively are: 

The ore which is purified by leaching process is: 

Which of the following can form iconic micelles in water?

Let a1, a2, a3,.....,an be positive real numbers.Then the minimum value of \(\frac{a_1}{a_2}+\frac{a_2}{a_3}+....+\frac{a_n}{a_1}\) is
The correct set(s) of reactions to synthesize benzoic acid starting from benzene is/are
An electron in the 5d orbital can be represented by the following(n,1,mr) values
The conversion(s) that can be carried out by bromine in carbon tetrachloride solvent is/are
Which of the following mixtures act(s) as a buffer solution?
Which statement(s) is/are applicable above critical temperature?
 
'G' in the above sequence of reaction is
Nickel combines with a uninegative monodentate ligand (X-) to form a paramagnetic complex [NiX4]2-.The hybridization involved and number of unpaired electrons present in the complex and respectively