What happens when crystals of lead nitrate are heated strongly in a dry test tube?
(1) Crystals immediately freeze
(2) A brown residue is left
(3) White fumes appear in the tube
(4) A yellow residue is left 26. The charge to mass ratio of D-particles is approximately ______ the charge to mass ratio of protons (1) twice (2) half (3) four times (4) six times
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1) Right one is no. 4 (Yellow residue will left)
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