Q. Which of the following is/are the impurities in commercial hydrofluoric acid that decreases corrosion of steel?

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Q. Which of the following metal is an outstanding material that resists all concentrations of hydrofluoric acid at all temperatures?

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Q. Why straight chromium stainless steels and austenitic stainless steels are not recommended for hydrofluoric acid applications?

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Q. Which of the following materials is/are widely used for phosphoric acid?

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Q. Which of the following materials exhibits poor corrosion resistance to phosphoric acid?

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Q. Which of the following is/are the impurities that cause corrosion in commercial phosphoric acid?

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Q. Which of the following non-metallic has the highest corrosive resistance to the phosphoric acid with temperature?

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Q. Which of the following metals will have the same crystal structure as that of the given figure?

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Q. What is the packing fraction of a crystal structure that is depicted in the given figure?

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Q. Which of the following thermoplastic monomer is depicted in the given figure?

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Q. What is the chemical name of the compound that is depicted in the given figure?

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Q. Which of the following are the functions of the given graph on the x and y-axis respectively?

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