When conc. H₂SO₄ is added to dry KNO₃, brown fumes are evolved. These fumes are of
Options
(a) SO₂ (b) SO₃ (c) NO (d) NO₂
Correct Answer:
NO₂
Explanation:
When heated with conc. H₂SO₄ […]
Which is difference between melting and boiling point of zero group elements
Options
(a) Melting point is higher than boiling point (b) Boiling point is higher than melting point (c) Both have same […]
H₂S₂O₇ has a commercial name as
Options
(a) oil of vitriol (b) hypo (c) oil of sulphur (d) oleum
Correct Answer:
oleum
Explanation:
No explanation available. Be the first to write the explanation […]
Which of the following about fluorine is not correct
Options
(a) The electron affinity of chlorine is greater than fluorine (b) The bond energy of fluorine is less than chlorine (c) Fluorine does […]
Which of the following is used in the preparation of chlorine
Options
(a) Only MnO₂ (b) Both MnO₂ and KMnO₄ (c) Only KMnO₄ (d) Either MnO₂ or KMnO₄
Correct Answer:
Both MnO₂ and […]
Chlorine is in +1 oxidation state in which of the following
Options
(a) HCl (b) Cl₂O (c) HClO₄ (d) Cl₂
Correct Answer:
Cl₂O
Explanation:
No explanation available. Be the first to write the […]
which of the following oxy acids of phosphorus is a reducing agent and monobasic
Options
(a) H₃PO₂ (b) H₃PO₃ (c) H₃PO₄ (d) H₄P₂O₆
Correct Answer:
H₃PO₂
Explanation:
No explanation available. Be the first […]
Solubility of iodine in water may be increased by adding
Options
(a) chloroform (b) potassium iodide (c) carbon disulphide (d) sodium thiosulphte
Correct Answer:
potassium iodide
Explanation:
The solubility of I₂ in water increases […]
Which is weakest acid
Options
(a) HI (b) HBr (c) HCl (d) HF
Correct Answer:
HF
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting […]
The orthophosphoric acid is a
Options
(a) tribasic acid (b) monobasic acid (c) tetrabasic acid (d) dibasic acid
Correct Answer:
tribasic acid
Explanation:
No explanation available. Be the first to write the […]
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