Chemistry
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New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (ii) and (iv)
Tetrahedral geometry characterises the structure of a white phosphorus molecule.
Phosphorus has a valency of 5, and there are four phosphorus atoms in total. As a result, there will be a total of 4*5=20 valence electrons.
As a result, each P atom will have one lone pair of electrons, and each covalent bond (two electrons) will be established.
In a molecule of white phosphorus, there will be four lone pairs of electrons and six P-P single bonds in total.
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (ii), (iii)
MI > MBr > MCl > MF is an iconic character of metal halide
F2 > Cl2 > Br2 > I2 is a bond dissociation enthalpy
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (i) and (iii)
6NaOH+3Cl2 → 5NaCl+NaClO3+3H2O
Chlorine gas oxidation number ranges from 0 to –1 to 0 to +5.
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (ii)
BrO2- (35+2*8+1=52) and BrF2+ (35+2*9−1=52)
52 electrons are present in both
New answer posted
9 months ago
Contributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (iii)
The ability of a substance to be decreased is known as its reduction potential. As the substance's reduction potential rises, so does its power to reduce. It signifies the chemical's oxidising power (the ability of the material to cause other substances to lose electrons, which is known as oxidising power) grows.
As a result, the oxidising power is listed in decreasing order BrO4- > IO4- > ClO4-
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (iv)
The ionic bonding promotes the crystalline structure of PCl5 in the solid state by attempting to exist as oppositely charged ions like [PCl4]+ and [PCl6]− . Also, [PCl4]+ and [PCl6]− are tetrahedral and octahedral, respectively. These structures fit together well, giving the solid structure extra stability.
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (iii)
Bartlett noticed that Xenon's first ionisation potential is nearly identical to that of oxygen and used Born-Haber calculations to predict the presence of a stable compound: Xe+ Pt F6-
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (iv)
MnO2 ( Black )+4HCl→MnCl2+2H2O+Cl2
Greenish yellow color
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (iii)
C+2H2SO4→CO2+2SO2+2H2O
Conc. H2SO4 oxidises C to produce two gaseous products.
New answer posted
9 months agoContributor-Level 10
This is a multiple choice answer as classified in NCERT Exemplar
Correct option is (i)
Peroxy linkage refers to the presence of a bond between oxygen and oxygen (O-O) in a molecule.
Only H2S2O6 and H2S2O7 of the sulphur oxoacids above have a peroxy linkage.
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