Description : In molecule of calcium sulfide calcium has two valence electron bonds and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium?
Last Answer : What is the answer ?
Description : Asseration: The first real compound of the noble gases in `1962 "was" Xe^(+)[PtF_(6)]^(-)`. Reason: The discovery was based on the basis of comparable
Last Answer : Asseration: The first real compound of the noble gases in `1962 "was" Xe^(+)[PtF_(6)]^(-)`. Reason: The discovery ... = 90^(@)` D. `A = B = 90^(@)`
Last Answer : Asseration: The first real compound of the noble gases in `1962 "was" Xe^(+)[PtF_(6)]^(-)` ... `. A. tetrahedral B. pyramidal C. octahedral D. angular
Description : Asseration: `3SnCl_(2)+6HCl+O_(3)rarr3SnCl_(4)+3H_(2)O` is possible reaction showing oxidising nature of `O_(3)`. Reason: `O_(3)` whenever used as oxi
Last Answer : Asseration: `3SnCl_(2)+6HCl+O_(3)rarr3SnCl_(4)+3H_(2)O` is possible reaction showing oxidising ... as oxidising agent essentially liberates `O_(2)`.
Description : Asseration: Number of `S-S` bonds in `H_(2)S_(n)O_(6)` is (n-1). Reason: `H_(2)S_(n)O_(6)` shows `HO_(3)S-underset((n-2))(S)-SO_(3)H`
Last Answer : Asseration: Number of `S-S` bonds in `H_(2)S_(n)O_(6)` is (n-1). Reason: `H_(2)S_(n)O_(6)` shows `HO_(3)S-underset((n-2))(S)-SO_(3)H`
Description : Asseration: The thermal stability of hydrides of oxygen family decrease with molecular weight. Reason: The decomposition of `M-H` bond requires lesser
Last Answer : Asseration: The thermal stability of hydrides of oxygen family decrease with molecular weight. Reason: The decomposition ... in `O-H` than `S-H`.
Description : Asseration: Cyclic trimer of `SO_(3)` possesses have six membered hetero-cyclic chains made up of `S` and `O`-atoms Reason: Cyclic trimer of `SO_(3)`
Last Answer : Asseration: Cyclic trimer of `SO_(3)` possesses have six membered hetero-cyclic chains made up of `S` and ` ... SO_(3)` is referred as `gamma-SO_(3)`.
Last Answer : Asseration: Cyclic trimer of `SO_(3)` possesses have six membered hetero-cyclic chains made up of `S` and ` ... C. `2,12sigma,4pi` D. `4,12sigma, 3pi`
Last Answer : Asseration: Cyclic trimer of `SO_(3)` possesses have six membered hetero-cyclic chains made up of ` ... -I is not correct and Statement-II is correct
Last Answer : Asseration: `3SnCl_(2)+6HCl+O_(3)rarr3SnCl_(4)+3H_(2)O` is possible reaction showing oxidising ... -I is not correct and Statement-II is correct
Description : `S_(1): 2Se_(2)Cl_(2)rarr SeCl_(4)+3Se` `S_(2)` : Dioxides like `MnO_(2), PbO_(2)` do not form `H_(2)O_(2)` with dilute acids but they evolve oxygen w
Last Answer : `S_(1): 2Se_(2)Cl_(2)rarr SeCl_(4)+3Se` `S_(2)` : Dioxides like `MnO_(2), PbO_(2)` do not ... when boiled with water. A. FTTT B. TFTT C. FFTT D. TTTF
Description : You havea class A network address 10.0.0.0 with 40subnets,but arerequiredto add 60 new subnets very soon. You would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should youassign? A. ... B. 255.248.0.0 C. 255.252.0.0 D. 255.254.0.0 E. 255.255.255.255
Last Answer : 255.254.0.0
Description : What shape would a molecule with two bounds groups and two lone pairs have?
Last Answer : The correct answer is: Bent.
Description : Where are the two lone pairs of electrons of the oxygen atom in an alcohol molecule located? (a) in two p orbitals (b) in two sp orbitals (c) in two sp2 orbitals (d) in two sp3 orbitals
Last Answer : in two sp3 orbitals
Description : Explain why the water molecule has a bent shape and a bond angle less than 109.5° The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together
Last Answer : The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together
Description : `NH_4ClO_4 + NHO_3 to (A) + (B) oversetDeltato (C )` (neutral oxide) The summation of number of lone pairs and atomicities of compound B and C is .
Last Answer : `NH_4ClO_4 + NHO_3 to (A) + (B) oversetDeltato (C )` (neutral oxide) The summation of number of lone pairs and atomicities of compound B and C is .
Description : The summation of total no. of lone pairs and `sigma` bonds in in species (A,B and C) is
Last Answer : The summation of total no. of lone pairs and `sigma` bonds in in species (A,B and C) is
Description : The number of lone pairs of electrons present in central atom of `CIF_3` is:
Last Answer : The number of lone pairs of electrons present in central atom of `CIF_3` is:
Description : The number of lone pairs on central atom in `XeF_2, XeF_4 and XeF_6` are:
Last Answer : The number of lone pairs on central atom in `XeF_2, XeF_4 and XeF_6` are: A. (A) 1,2,3 B. (B) 3,2,1 C. (C) 2,2,1 D. (D) 1,3,2
Description : Among the following molecules, `(i)XeO_(3)(ii)XeOF_(4)(iii)XeF_(6)` those having same number of lone pairs on `Xe` are:
Last Answer : Among the following molecules, `(i)XeO_(3)(ii)XeOF_(4)(iii)XeF_(6)` those having same number of lone pairs on ... iii) only D. (D) (i),(ii) and (iii)
Description : Total number of lone pairs on Xe in `XeF_(2), XeO_(3)F_(2), XeF_(4), XeF_(6)` is t,u,v & w respectively. Then
Last Answer : Total number of lone pairs on Xe in `XeF_(2), XeO_(3)F_(2), XeF_(4), XeF_(6)` is t,u,v & w respectively. Then A. ... `v +w = 3` C. `u = 0` D. `w = 1`
Description : Which of the following xenon compound has the same number of lone pairs as in `I_(3)^(-)`? (near central atom)
Last Answer : Which of the following xenon compound has the same number of lone pairs as in `I_(3)^(-)`? (near central atom) ... XeO_(3)` C. `XeF_(4)` D. `XeO_(4)`
Description : How many lone pairs are associated with xenon in xenon difluoride ?
Last Answer : How many lone pairs are associated with xenon in xenon difluoride ? A. 1 B. 2 C. 3 D. 4
Description : The number of lone pairs of electrons present on Xe in `XeF_(2)` ?
Last Answer : The number of lone pairs of electrons present on Xe in `XeF_(2)` ? A. 3 B. 4 C. 2 D. 1
Description : The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is
Last Answer : The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is A. 4 B. 3 C. 2 D. zero
Description : In `OF_2`, the number of bond pairs and lone pairs of electrons are respectively,
Last Answer : In `OF_2`, the number of bond pairs and lone pairs of electrons are respectively, A. 2,6 B. 2,8 C. 2,10 D. 2,9
Description : The number of lone pairs available on the central atom of sulphur tetra fluoride is
Last Answer : The number of lone pairs available on the central atom of sulphur tetra fluoride is
Description : How many lone pairs in CCl4?
Last Answer : Zero
Description : Do lone pairs have an effect on bond angles?
Last Answer : Need answer
Description : How many lone pairs of electrons exist on the central atom in ammonia?
Last Answer : One lone pair. The central atom is N (nitrogen) which has 5valence electrons. Three of them are shared with 3 hydrogen atoms,leaving 2 electrons (1 lone pair) on the N.
Description : Which of the following species contains three bond pairs and one lone pair around the central atom? (1) PCl3 (2) H2O (3) BF3 (4) NH2
Last Answer : PCl3
Description : How many electron lone pairs are on the central atom in Hydrogen Sulfide?
Last Answer : ANSWER: TWO
Description : Diamond structure can be considered as ZnS (Zinc blend) structure in which each `Zn^(2+)` in alternate tetrahedral void and `S^(2-)` in cubic close pa
Last Answer : Diamond structure can be considered as ZnS (Zinc blend) structure in which each `Zn^(2+)` in alternate tetrahedral void ... . 6.92 Å C. 1.73 Å D. 3 Å
Description : Compound having tetrahedral structure is ______. (1) C2H4 (2) C2H2 (3) CH4 (4) None of these
Last Answer : (3) CH4 Explanation: Methane is a tetrahedral molecule with four equivalent C-H bonds. Its electronic structure is described by four bonding molecular orbital resulting from the overlap of the valence orbitals on C and H.
Description : Diamond is harder than graphite because of – (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these
Last Answer : (1) difference in layers of atoms Explanation: Diamond is harder than graphite because diamond has a more complex structure. Diamond's structure is like many pentagons connected together, each pentagon ... together in some way. Graphite's structure is very loose, with its bonds forming layers.
Description : (a) If the radius of the Br ion is 0.182 nm, how large a cation can fit in each of the tetrahedral hole. (b) AgI crystallizes in a cubic closed packed ZnS structure. What fraction of tetrahedral site ... Ag ion ? (c) At what temp. range, most of the metals becomes super conductors ?
Last Answer : (a) For a tetrahedron the limiting ratio is 0.225 – 0.414 For largest cation highest value 0.414 would be considered. r + / r– = 0.414 r + = 0.414 × 0.182 = 0.075 nm. (b) In FCC there are 8 tetrahedral voids. Out of this ½ is occupied by Ag cation. (c) 2 k – 5 k.
Description : The structure of an ammonia molecule can best be described as: w) linear x) tetrahedral y) pyramidal z) triagonal planar
Last Answer : ANSWER: Y -- PYRAMIDAL
Description : Diamond is harder than graphite because of : (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these
Last Answer : difference in layers of atoms
Description : Assertion: Bond angle at oxygen in ethehers is greater than ideal tetrahedral angle Reason: Stearic hindrance between alkyl groups increase bond angle
Last Answer : Assertion: Bond angle at oxygen in ethehers is greater than ideal tetrahedral angle Reason: Stearic ... D. Assertion is false, Reason is true
Description : There are one octahedral void and __________ tetrahedral void in the closest packing of atoms. (A) One (B) Two (C) Three (D) None of these
Last Answer : Option B
Description : Why are low spin tetrahedral complexes not formed? -Chemistry
Last Answer : Law spin tetrahedral complexes are rarely observed because orbital splitting energies for tetrahedral complexes are sufficiently large for forcing pairing.
Description : The species having tetrahedral shape is
Last Answer : The species having tetrahedral shape is A. `[PdCl_(4)]^(2-)` B. `[Ni(CN)_(4)]^(2-)` C. `[Pd(CN)_(4)]^(2-)` D. `[Ni(Cl)_(4)]^(2-)`
Description : The magnitude of crystal field stabilisation energy (CFSE of `Delta_(1)`) in tetrahedral complexes is considerably less than that in the octahderal fi
Last Answer : The magnitude of crystal field stabilisation energy (CFSE of `Delta_(1)`) in tetrahedral complexes is ... Both point (A) and (B) are wrong.
Description : A coordination complex of type `MX_(2)Y_(2)`[M=metal ion, X,Y=monodentata ligands ], can have either a tetrahedral of a square planar geometry. The ma
Last Answer : A coordination complex of type `MX_(2)Y_(2)`[M=metal ion, X,Y=monodentata ligands ], can have either a tetrahedral ... 2 and 1 C. 1 and 3 D. 3 and 2
Description : The species having tetrahedral shape is :
Last Answer : The species having tetrahedral shape is : A. `[PdCl_(4)]^(2-)` B. `[Ni(CN)_(4)]^(2-)` C. `[Pd(CN)_(4)]^(2-)` D. `[NiCl_(4)]^(2-)`
Description : All the following complexes show decrease in their weights when placed in a magnetic balance then the group of complexes having tetrahedral geometry i
Last Answer : All the following complexes show decrease in their weights when placed in a magnetic balance then the group of ... III C. I,III,IV D. none of these
Description : Which of the following molecules is not tetrahedral ?
Last Answer : Which of the following molecules is not tetrahedral ? A. `[Pt(en)_(2)]^(2+)` B. `[Ni(CO)_(4)]` C. `[Zn(NH_(3))_(4)]^(2+)` D. `[NiCl_(4)]^(2-)`