A breathalyzer test is used to detect drunken drivers. The crystals used will change colour, from orange to dark green, if ethanol vapour is detected. Explain the colour change and give a suitable equation for the reaction.

Q: Determine the expected crystal structure including the ion positions of the hypothetical salt AB2,…

A:

Q: On heating a crystal of KC1 in potassium vapour, the crystal starts exhibitinga violet colour. What…

A: F-centres are the anion vacancies engaged by free electrons as in alkali metal halides.

Q: When chromite ore FeCr2O4 is fused with NaOH in presence of air, a yellow coloured compound (A) is…

A: Let us break the given sequence of reactions in different steps as: 1. Chromite ore FeCr2O4 is fused…

Q: Explain why does conductivity of germanium crystals increase on doping with galium.

A: Gallium is a trivalent element while germanium is tetravalent

Q: Explain the structures and preparation of (SCN)2 , (SeCN)2 , (SCSN3)2 and (OCN)2.

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Q: ive short answers to the following. a. What is the correlation of ionization potential and atomic…

A: a. As we move from left to right atomic number increases because electron getting added but…

Q: The melting point of TiCl4 (-24°C) lies below those ofTiF4 (284°C) and TiBr4 (38°C). Explain why by…

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Q: Disulfur decafluoride is intermediate in reactivity between SF₄ and SF₆. It disproportionates at…

A: Disulfur decafluoride is an intermediate formed by the reaction of SF4 and SF6. It is not very…

Q: Write the chemical equation that describes the dissolution of gypsum in water and describe how many…

A: Gypsum dissociates in water to form its ions.

Q: Magnesium carbonate is soluble in water (100 mg / L) whereas strontium carbonate is only slightly…

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Q: What is the general trend of the boiling point of the hydrides of the chalcogens (H2S, H2Se, H2Te)…

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Q: n each of the following cases give the name or structure of one compound which fits the information…

A: In the given question, two situations are given in which the name or structure of one compound has…

Q: Explain why the energetics of dissolution can be different for elements in the same group?

A: Dissolution energy is defined as the amount of energy released when a solute is dissolved in a…

Q: Based on Crystal Field Theory, discuss why [MnO4] is deeply coloured.

A: The reason why [MnO4]- is deeply colored has to be explained based on Crystal Field Theory,

Q: Write a short note on the stability of bicarbonates and carbonates of alkali metals

A: As we are moving from Li to Cs from top to bottom of the periodic table thermal stability of…

Q: c) For the reaction of chlorine with cold dilute aqueous sodium hydroxide: L) Write a balanced…

A: 1.2Na(OH)(aq) + Cl2(g)  ➨ NaCl(aq) + NaOCl(aq) + H2(l) 2.oxidation number of chlorine before the…

Q: Relative to the octahedral crystal 2 pc field, in the square planar crystal field the d-orbitals xy,…

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Q: Explain the following observations: (i) Phosphorus has a greater tendency for catenation than…

A: i)Phosphorus has a greater tendency for catenation than nitrogen. Due to small atomic size N-N…

Q: Geosciences are very versatile. This fact rests or the finding that the number of silicate minerals…

A: a) The step by step reaction sequence from silicic acid to tricyclosilicate is shown below-

Q: Describe the preparation of (i) Potassium dichromate from sodium chromate

A: Describe the preparation of (i) Potassium dichromate from sodium chromate

Q: In each of the following cases give the name or structure of one compound which fits the information…

A: Answer to both the parts is given below.

Q: What is metallic glass? Describe the features that promote high glass-forming ability in metals.

A: Metallic glass: It is an amorphous metal alloy. The atoms in the materials are decorated by…

Q: Analyse the progress and assesses Solvay process for the production of sodium carbonate as an…

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Q: Lead is more often found in nature as its sulfide than its oxide. Provide a brief rationale for this…

A: Most of the proportion of lead is found in earth crusting, where it is in the form of sulfide ore.…

Q: What is the details programme of the traineeship in mineral processing?

A: details programme of the traineeship in mineral processing:

Q: rigid, crystal lattice? Calculate the recoil free of 57 Fe atom. energy a (mc2 = 5 x 1010 eV, E, =…

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Q: 3. Sketch all the Bravais lattices, why is there no Face centered tetragonal while there is a base…

A: By knowing the smallest unit cell of the compound we can know about the packing of the solid and…

Q: How does the maximum oxidation number vary across aperiod in the main groups? Is the pattern in…

A: Main groups include s and p block elements. s block includes group 1 and 2 and p block includes…

Q: (a) Mention the optimum conditions for the industrial manufacture of ammonia by Haber’s process. (b)…

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Q: a reaction equation for the synthesis of Sodium hypochlorite

A: Sodium hypochlorite(NaClO) can be synthesised by reacting NaOH with chlorine gas.

Q: Why do the alkaline earths have low resistivities?

A: Resistivity is the property of a substance that determines how a substance can efficiently resist or…

Q: How to prepare the following given a free choice of normal laboratory reagents or any equipment:…

A: Laboratory reagent: These reagents are man-made chemical species which is prepared in laboratory…

Q: Why are fluorides of transition metals more stable in their higher oxidation state as compared to…

A: The stability of the lower vs. higher oxidation state of halides of transition metals depends on the…

Organometallic Compounds of s- and p- block elements

Organometallic compounds have a minimum of one bond between a metal compound and a carbon atom. Metalloid elements such as silicon, tin, and boron form organometallic compounds which can be utilized in a few commercial chemical reactions.