Chemistry-
General
Easy
Question
Electromagnetic radiation with maximum wave length is
- ultra-violet
- radio wave
- X-rays
- Infrared.
The correct answer is: radio wave
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Bohr’s model can explain
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Maximum number of electrons present in ‘N’ shell is
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The increasing order for the values of e/m (charge/mass) is
The increasing order for the values of e/m (charge/mass) is
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The electron level which allows the hydrogen to absorb photons but not to emit is
The electron level which allows the hydrogen to absorb photons but not to emit is
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When alpha particles are sent through a thin metal foil, most of them go straight through the foil because
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The symbol of the element whose atoms have the outer most electronic configuration 2s2, 2p3 is
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A binary solid (A+B-) has a rock salt structure. If the edge length is 400 pm and radius of cation is 75 pm, the radius of anion is
A binary solid (A+B-) has a rock salt structure. If the edge length is 400 pm and radius of cation is 75 pm, the radius of anion is
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If NaCl is doped with 10-3mol % SrCl2 then the concentration of cation vacancies will be :
If NaCl is doped with 10-3mol % SrCl2 then the concentration of cation vacancies will be :
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X- rays of wavelength equal to 0.134 nm give a first order diffraction from the surface of a crystal when the value of is 10.5° The distance between the planes in the crystal parallel to the surface is (sin 10.5° = 0.1822)
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The wavelength of X-rays which gives a diffraction angle, , equal to 16.80° for a first order diffraction for a crystal with interplanar distance 0.200 nm, is ( given sin 8.4° = 0.146)
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The second order Bragg diffraction of X- rays with 
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The ionic radii of Rb+ and I- are 1.46 and 
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A solid AB has NaCl type structure. If the radius of the cation A is 100 pm, then the radius of the anion B will be
A solid AB has NaCl type structure. If the radius of the cation A is 100 pm, then the radius of the anion B will be
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A binary solid 
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A substance Ax By crystallizes in a face centred cubic (FCC) lattice in which atoms ‘A’ occupy each corner of the cube and atoms ‘B’ occupy the centres of each face of the cube. Identify the correct composition of the substance AxBy
A substance Ax By crystallizes in a face centred cubic (FCC) lattice in which atoms ‘A’ occupy each corner of the cube and atoms ‘B’ occupy the centres of each face of the cube. Identify the correct composition of the substance AxBy
chemistry-General
