Oxidation States and Oxides

Oxygen has 8 protons in its nucleus, giving it atomic number 8. Carbon has atomic number 6, sulfur has 16, and germanium has 32. The atomic number defines an element and equals its proton count.

In K3[Fe(CN)6]: K is +1 each (total +3), CN is -1 each (total -6). For neutral compound: +3 + Fe + (-6) = 0, so Fe = +3. This is ferricyanide; the related ferrocyanide K4[Fe(CN)6] has Fe(+2).

O3 represents ozone - a molecule consisting of three oxygen atoms. It is not the same as oxygen (O2), oxytone (a linguistic term), Oxford (a city), or Oxford University. Ozone plays a crucial role in the atmosphere, both as a protective layer in the stratosphere and as a pollutant at ground level.

Ferrocene is an organometallic compound consisting of two cyclopentadienyl rings bound on opposite sides of a central iron atom. Its chemical formula is Fe(C5H5)2, which totals FeC10H10.

Valency of Al is 3 and that of O is 2. The formula of compound formed is given by reversing the valencies of elements.

Number of P-O bonds in is P₄O₁₀ 16. 

Sulphur monoxide is an inorganic compound with formula SO. It is only found as a dilute gas phase. When concentrated or condensed, it converts to S₂O₂. It has been detected around Io, one of Jupiter's moons, both in atmosphere and in plasma torus.

Coordination number and oxidation number of Cr in given complex are 6 and +3, respectively.  

The manganate ion is MnO4^2-. Oxygen has -2 oxidation state, so total from 4 oxygens = -8. For ion charge -2: x + (-8) = -2, therefore x = +6.

Correct answer. Limonite (Fe₂O₃.3H₂O) is the ore of iron and sphalerite is the ore of zinc. Zinc oxide is an inorganic compound with the formula ZnO. ZnO is a white powder that is insoluble in water, and it is widely used as an additive in numerous materials and products including rubbers, plastics, ceramics, glass, cement, etc. White lead (PbCO₃)₂•Pb(OH)₂ is a complex chemical compound, containing both a carbonate and a hydroxide portion and occurs naturally as a mineral for lead. White lead compounds were used as pigmenting materials like cement, lubricants, etc. But due to its toxicity, they are not used frequently.

Ozone is a molecule composed of three oxygen atoms (O3). It differs from the normal oxygen we breathe (O2, dioxygen) and is formed when UV radiation splits O2 molecules and they recombine with other oxygen atoms. O and O4 are not stable forms of oxygen in normal conditions.

K2Cr2O7 is the chemical formula for potassium dichromate. The compound contains two potassium (K) atoms and two chromium (Cr) atoms in a +6 oxidation state, with seven oxygen (O) atoms. Potassium triacetates would be K(C2H3O2)3, potassium chromate is K2CrO4, and chromic acid is H2CrO4.

This option is correct because the mixture of Ce are treated with oxidising agent bromate in neutral medium to form a pracipitate Ce(OH)₄.

Oxidation state  of Fe in K₂Fe⁺⁶O₄ = + 6

Metals react with oxygen to form basic oxides because they are electropositive elements that readily lose electrons. This is a key chemical property distinguishing metals from non-metals, which typically form acidic or neutral oxides. Option A is incorrect because metals tend to lose electrons (not gain). Option B is wrong because metals are reducing agents (not oxidizing agents). Option D is false because metals are electropositive (not electronegative).