Which one of the following statements about halogens is correct
Which one of the following statements about halogens is correct
Options
(a) F₂ has lower bond dissociation energy than Cl₂ (b) The electron affinities are in the order F > Cl > Br […]
Questions
Chlorine dioxide is best prepared by passing dry
Chlorine dioxide is best prepared by passing dry
Options
(a) chlorine gas over hot HgO (b) chlorine and oxygen gas over hot Pt catalyst (c) hydrogen chloride and oxygen over silver oxide (d) […]
When chlorine water is exposed to sunlight, the colour change that occurs is
When chlorine water is exposed to sunlight, the colour change that occurs is
Options
(a) colourless to brown (b) brown to colourless (c) light blue to colourless (d) greenish yellow to colourless
Correct […]
In Ramsay and Rayleigh’s isolation on noble gases from air,the nitrogen of the
In Ramsay and Rayleigh’s isolation on noble gases from air, the nitrogen of the air is finally converted into
Options
(a) NaNO₂ only (b) NO and NO₂ (c) NaNO₃ only (d) NaNO₂ and […]
Use of chlorofluoro carbons is not encouraged because
Use of chlorofluoro carbons is not encouraged because
Options
(a) they are harmful to the eyes of people that use it (b) they damage the refrigerators and air conditioners (c) they eat away […]
Aqueous solutions of hydrogen sulphide and sulphur dioxide when mixed together
Aqueous solutions of hydrogen sulphide and sulphur dioxide when mixed together, yield
Options
(a) sulphur trioxide and water (b) hydrogen and sulphurous acid (c) sulphur and water (d) hydrogen peroxide and sulphur
Correct […]
The most efficient agent for the absorption of SO₃ is
The most efficient agent for the absorption of SO₃ is
Options
(a) 90% of H₂SO₄ (b) 80% of H₂SO₄ (c) 20% of oleum (d) 98% H₂SO₄
Correct Answer:
98% H₂SO₄
Explanation:
No explanation […]
The percentage of nitrogen in urea is
The percentage of nitrogen in urea is
Options
(a) 46 (b) 59 (c) 25 (d) 54
Correct Answer:
46
Explanation:
The percentage of nitrogen in urea is 46% (Most concentrated nitrogenous fertiliser). It […]
P₂O₅ is an anhydride of
P₂O₅ is an anhydride of
Options
(a) H₃PO₄ (b) H₂P₂O₇ (c) H₃PO₃ (d) HPO₃
Correct Answer:
HPO₃
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
In the process of nitration, the electrophile formed is
In the process of nitration, the electrophile formed is
Options
(a) NO₂⁺ (b) NO₃⁻ (c) NO₂⁻ (d) NO⁺
Correct Answer:
NO₂⁺
Explanation:
No explanation available. Be the first to write the explanation for […]