Who suggested that most of the mass of the atom is located
in the nucleus?
4 None of these
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The answer might be thomson or bohr or rutherford or might be none of these
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The wavelength of X-ray is of order of 1 1 cm 2 1m 3 1 Angstrom 4 10 micron
Why sun seems to be a red colour while sun-rising and sun- setting?
Who is the first female cosmonaut?
Which isotope of Uranium is capable of sustaining chain reaction ?
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of 1 Nitrates 2 Zeolites 3 Sulphontes 4 None of these
where the 3rd earthsummit held
In which year, atmospheric observations using balloons started?
Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide
0.005M K2Cr2O7 solution for calibration of UV.why 0.005M K2Cr2O7?
Which of the following is not an isotope of hydrogen? 1 Protium 2 Yitrium 3 Deuterium 4 Tritium
Enriched uranium used in a nuclear reactor is 1 Uranium freed of all impurities 2 Uranium treated with radiation 3 Uranium alloyed with aluminum 4 Uranium with a high percentage of a particular isotope
Gypsum is added to cement clinker to 1 Increase the tensile strength of cement 2 Bind the particles of calcium silicate 3 Decrease the rate of setting of cement 4 Facilitate the formation of colloidal gel