The oxidation number of phosphorus and basicity of acid in pyrophosphoric acid respectively are
Options
(a) four and three (b) one and four (c) five and four (d) three and one
Correct Answer: […]
The solubility of I₂ increases in water in the presence of
Options
(a) KMnO₄ (b) KI (c) C₂S (d) H₂SO₄
Correct Answer:
KI
Explanation:
No explanation available. Be the first to write the […]
The elements with atomic number 9,17,35,53,85 are called
Options
(a) inert gases (b) halogens (c) chalcogens (d) cnicogens
Correct Answer:
halogens
Explanation:
No explanation available. Be the first to write the explanation for […]
In NH₃ and PH₃, the common feature is
Options
(a) basic nature (b) odour (c) acidic nature (d) combustibility
Correct Answer:
basic nature
Explanation:
No explanation available. Be the first to write the […]
Which of the following oxides of nitrogen is paramagnetic
Options
(a) NO₂ (b) N₂O₃ (c) N₂O (d) N₂O₅
Correct Answer:
NO₂
Explanation:
No explanation available. Be the first to write the explanation for […]
Which of the following has ability to release bromine from potassium bromide
Options
(a) Iodine (b) Bromine (c) Fluorine (d) SO₂
Correct Answer:
Fluorine
Explanation:
No explanation available. Be the first to write […]
Bromine water reacts with SO₂ to form
Options
(a) HBr and S (b) H₂O and HBr (c) S and H₂O (d) H₂SO₄ and HBr
Correct Answer:
H₂SO₄ and HBr
Explanation:
No explanation available. […]
Which of the following has zero valency
Options
(a) He (b) H (c) O (d) Na
Correct Answer:
He
Explanation:
No explanation available. Be the first to write the explanation for this question […]
The oxidising ability of halogens
Options
(a) increases from fluorine to iodine (b) decreases from fluorine to iodine (c) increases from fluorine to chlorine and then decreases (d) remains constant down the group
Ozone is formed in the upper atmosphere from oxygen by the action of
Options
(a) ultraviolet rays (b) cosmic rays (c) free radicals (d) nitrogen oxides
Correct Answer:
ultraviolet rays
Explanation:
No explanation […]
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