Chemistry-
General
Easy
Question
Two gases when mixed give white dense fumes, the gases are
and 
- and steam
- and
- and
and
and steam
and
and
The correct answer is: and
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Which of the following salt gives white precipitate with 
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solution and gives green flame test
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.
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chemistry-General
Flame colour of Ba salt is green
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An electron in the ground state of hydrogen atom is revolving in anticlockwise direction in the circular orbit of radius R The atom is placed in a uniform magnetic induction B such that the plane normal of electron orbit makes an angle 300 with B, as shown in figure The torque experienced by electron will be
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In a Bohr atom the electron is replaced by a particle of mass 150 times the mass of the electron and the same charge If a0 is the radius of the first Bohr orbit of the orbital atom, then that of the new atom will be
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The figure shows energy levels of a certain atom, when the system moves from level 2E is emitted The to E, a photon of wavelength wavelength of photon produced during its transition from level 4/3 E to E level is:
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A cylindrical solid of length L and radius a is having varying resistivity given by r = r0 x where r0 is a positive constant and x is measured from left end of solid. The cell shown in the figure is having emf V and negligible internal resistance. The electric field as a function of x is best described by :
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Consider an elemental part of solid at a distance x from left end of width dx. Resistance of this elemental part is
