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Riya08
@riya08
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Joined: Dec 29, 2021
Last seen: Mar 10, 2022
Topics: 0 / Replies: 2143
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Answer to: Illustrate how copper metal can give different products on reaction with HNO3.

Concentrated nitric acid is a strong oxidizing agent. It is used for oxidizing most metals. The products of oxidation depend on the concentration of t...

3 years ago
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Answer to: How is ammonia manufactured industrially?

Ammonia is prepared on a large-scale by the Haber's process. N2(g) + 3H2(g) → 2NH3(g)

3 years ago
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Answer to: Why does NH3 form hydrogen bond but PH3 does not?

Nitrogen is highly electronegative as compared to phosphorus. This causes a greater attraction of electrons towards nitrogen in NH3 than towards phosp...

3 years ago
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Answer to: Discuss the trends in chemical reactivity of group 15 elements.

General trends in chemical properties of group -15 (i) Reactivity towards hydrogen: The elements of group 15 react with hydrogen to form hydrides o...

3 years ago
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Answer to: Why does the reactivity of nitrogen differ from phosphorus?

Nitrogen is chemically less reactive. This is because of the high stability of its molecule, N2. In N2, the two nitrogen atoms form a triple bond. Thi...

3 years ago
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Answer to: Discuss the general characteristics of Group 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionisation enthalpy and electronegativity.

General trends in group 15 elements (i) Electronic configuration: All the elements in group 15 have 5 valence electrons. Their general electronic c...

3 years ago
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Answer to: Why has it been difficult to study the chemistry of radon?

It is difficult to study the chemistry of radon because it is a radioactive substance having a half-life of only 3.82 days. Also, compounds of radon s...

3 years ago
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3 years ago
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Answer to: Why is helium used in diving apparatus?

Air contains a large amount of nitrogen and the solubility of gases in liquids increases with increase in pressure. When sea divers dive deep into the...

3 years ago
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Answer to: Why is ICl more reactive than I2?

ICl is more reactive than I2 because I-Cl bond in ICl is weaker than I-I bond in I2.

3 years ago
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Answer to: Name two poisonous gases which can be prepared from chlorine gas.

Two poisonous gases that can be prepared from chlorine gas are (i) Phosgene (COCl2) (ii) Mustard gas (ClCH2CH2SCH2CH2Cl)

3 years ago
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Answer to: Give the reason for bleaching action of Cl2.

When chlorine reacts with water, it produces nascent oxygen. This nascent oxygen then combines with the coloured substances present in the organic mat...

3 years ago
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Answer to: Sea is the greatest source of some halogens. Comment.

Sea water contains chlorides, bromides, and iodides of Na, K, Mg, and Ca. However, it primarily contains NaCl. The deposits of dried up sea beds conta...

3 years ago
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Answer to: Give two examples to show the anomalous behaviour of fluorine.

Anomalous behaviour of fluorine (i) It forms only one oxoacid as compared to other halogens that form a number of oxoacids. (ii) Ionisation enth...

3 years ago
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Answer to: Considering the parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy, compare the oxidising power of F2 and Cl2.

Fluorine is a much stronger oxidizing agent than chlorine. The oxidizing power depends on three factors. 1. Bond dissociation energy 2. Electron...

3 years ago
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Answer to: Why is Ka2

H2SO4(aq) + H2O → H3O+ + HSO4- ; Ka1 > 10 HSO4- + H2O(l) → H3O+ + SO4- ; Ka2 = 1.2 x 10-2 It can be noticed that Ka1 >> Ka2 This is bec...

3 years ago
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Answer to: The deposition of X and Y on ground surfaces is referred as wet and dry depositions, respectively. X and Y are

Correct answer: (3) X = Ammonium salts, Y = SO2 Explanation: Oxides of nitrogen and sulphur are acidic and settle down on ground as dry deposition...

3 years ago
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Answer to: Which of the following is NOT an example of fibrous protein? (1) Keratin (2) Albumin (3) Collagen (4) Myosin

Correct answer: (2) Albumin Explanation: Keratin, collagen and myosin are example of fibrous protein.

3 years ago
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3 years ago
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