The correct statement about the synthesis of erythritol (C(CH2OH)4) used in the preparation if PETN is :
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The anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows:
In the context of the Hall - Heroult process for the extraction of Al, which of the following statements is false ?
If the equations x2+2x+3=0and ax2+bx+c=0,a,b,c∈R, have a common root, then a:b:cis
The I - V characteristic of an LED is
The period of oscillation of a simple pendulum is T=2πgL. Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution. The accuracy in the determination of g is :
Which of the following is the wrong statement?
The number of integers greater than 6,000 that can be formed, using the digits 3,5,6,7and8, without repetition, is :
The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is :