P Block Elements in Group 15 Archives - Page 2 of 9

When conc. H₂SO₄ is added to dry KNO₃, brown fumes are evolved. These fumes are of Options (a) SO₂ (b)…

7 years ago

Which is difference between melting and boiling point of zero group elements Options (a) Melting point is higher than boiling…

7 years ago

H₂S₂O₇ has a commercial name as Options (a) oil of vitriol (b) hypo (c) oil of sulphur (d) oleum Correct…

7 years ago

Which of the following about fluorine is not correct Options (a) The electron affinity of chlorine is greater than fluorine…

7 years ago

Which of the following is used in the preparation of chlorine Options (a) Only MnO₂ (b) Both MnO₂ and KMnO₄…

7 years ago

Chlorine is in +1 oxidation state in which of the following Options (a) HCl (b) Cl₂O (c) HClO₄ (d) Cl₂…

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which of the following oxy acids of phosphorus is a reducing agent and monobasic Options (a) H₃PO₂ (b) H₃PO₃ (c)…

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Solubility of iodine in water may be increased by adding Options (a) chloroform (b) potassium iodide (c) carbon disulphide (d)…

7 years ago

Which is weakest acid Options (a) HI (b) HBr (c) HCl (d) HF Correct Answer: HFExplanation:No explanation available. Be the…

7 years ago

The orthophosphoric acid is a Options (a) tribasic acid (b) monobasic acid (c) tetrabasic acid (d) dibasic acid Correct Answer:…

7 years ago