Which of the following compounds is most stable : LiF ,LiBr,LiCl,LiI ?

Which of the following compounds is most stable : LiF ,LiBr,LiCl,LiI ?
by

1 Answer

Answer :

Ans. LiF.
by

Related questions

Give reason for the following: (a)LiCl is more covalent than KCl. (b)LiF has lower melting point than NaCl. (c)CuCl is more covalent than NaCl.

Description : Give reason for the following: (a)LiCl is more covalent than KCl. (b)LiF has lower melting point than NaCl. (c)CuCl is more covalent than NaCl.

Last Answer : Ans(a).Due to smaller size and high poalrising power of Li+ ion ,LiCl is more covalent than KCl. (b)Small cation Li+ ion highly polarizes large anion I- , LiI is more covalent and hence has ... to pseudo inert gas configuration, Cu+ is more polarizing than Na+ and hence CuCl is more Covalent NaCl.

Which of the following four compounds would have t most ionic bond? w) CH4 x) LiF y) CsF z) N2

Description : Which of the following four compounds would have t most ionic bond? w) CH4 x) LiF y) CsF z) N2

Last Answer : ANSWER: Y -- CsF

Predict giving reason the outcome of the reaction, LiI +KF ----->

Description : Predict giving reason the outcome of the reaction, LiI +KF ----->

Last Answer : ANS.LiI +KF ------LiF +KI;Larger cation stabilizes larger anion. App

Give reason for the following: (i)alkali metals do not occur free in nature. (ii)alkali metals have low I .E. (iii)LiI is more soluble than KI in ethanol.

Description : Give reason for the following: (i)alkali metals do not occur free in nature. (ii)alkali metals have low I .E. (iii)LiI is more soluble than KI in ethanol.

Last Answer : Ans.(i)They are highly reactive in natur (ii) Because of large atomic size. (III)LiI is more covalent in character than KI

Give reason for the low solubility of LiF & CsI in water.

Description : Give reason for the low solubility of LiF & CsI in water. 

Last Answer : The low solubility of LiF in water is due to its high lattice enthalpy whereas the low solubility of CsI is due to smaller hydration enthalpy of its two ions. Other halides of lithium are soluble in ethanol, acetone and ethylacetate; LiCl is soluble in pyridine also. 

Which of the following species has the smallest equilibrium separation for its ion-pair? w) KF x) LiF y) BaBr z) NaCl

Description : Which of the following species has the smallest equilibrium separation for its ion-pair? w) KF x) LiF y) BaBr z) NaCl

Last Answer : ANSWER: B -- LiF

How many atoms of LiBr would you have if you start with 1.25 moles What is the answer and how did you get it?

Description : How many atoms of LiBr would you have if you start with 1.25 moles What is the answer and how did you get it?

Last Answer : Not atoms of LiBr; formula units is correct.1 mol = 6,022 140 857.10e23 (molecules, atoms, ions); this is the Avogadro number.6,022 140 857.10e23 x 1,25 = 7,52767607125.10e23 formula units of LiBr

What product is formed from the reaction of LiBr plus Cl2?

Description : What product is formed from the reaction of LiBr plus Cl2?

Last Answer : THe chemical reaction is:2 LiBr + Cl2 = 2 LiCl + Br2

For the equilibrium: `LiCl.3NH_(3(s))hArrLiCl.NH_(3(s))+2NH_(3)`, `K_(p)=9 atm^(2)` at `40^(@)C`. A `5 litre` vessel contains `0.1` mole of `LiCl.NH_(

Description : For the equilibrium: `LiCl.3NH_(3(s))hArrLiCl.NH_(3(s))+2NH_(3)`, `K_(p)=9 atm^(2)` at `40^(@)C`. A `5 litre` vessel contains `0.1` mole of `LiCl.NH_(

Last Answer : For the equilibrium: `LiCl.3NH_(3(s))hArrLiCl.NH_(3(s))+2NH_(3)`, `K_(p)=9 atm^(2)` at `40^( ... backward reaction for completion? A. 5 B. 9 C. 3 D. 1

What type of intermolecular forces are in LiCl?

Description : What type of intermolecular forces are in LiCl?

Last Answer : Lithium chloride form large lattices.

What is LII in roman numbers?

Description : What is LII in roman numbers?

Last Answer : As a Roman numeral LII is equivalent to 52

Who won Super Bowl LII?

Description : Who won Super Bowl LII?

Last Answer : Need answer

How many formula units of LiCl are equal to .648 moles?

Description : How many formula units of LiCl are equal to .648 moles?

Last Answer : 42.394 grams.

What is bond of LiF?

Description : What is bond of LiF?

Last Answer : Lithium fluoride has an ionic bond.

why does boron form stable electron deficient compounds?

Description : why does boron form stable electron deficient compounds?

Last Answer : Ansboron has three electrons in its valance shell that boron show three electrons with other element and form an electron deficient compound

Which of the following compounds is most stable? (a) Ethylene (b) 2,3-Dimethyl-1-butene(c) Propylene (d) 2-Butene

Description : Which of the following compounds is most stable? (a) Ethylene (b) 2,3-Dimethyl-1-butene (c) Propylene (d) 2-Butene

Last Answer : 2,3-Dimethyl-1-butene

In stable organic compounds, carbon will always form (a) 2 bonds (b) 4 bonds (c) 3 bonds (d) 5 bonds

Description : In stable organic compounds, carbon will always form (a) 2 bonds (b) 4 bonds (c) 3 bonds (d) 5 bonds

Last Answer : 4 bonds

In which of the following compounds, the `C-Cl` bond ion-isation shall give most stable carbonium ion?

Description : In which of the following compounds, the `C-Cl` bond ion-isation shall give most stable carbonium ion?

Last Answer : In which of the following compounds, the `C-Cl` bond ion-isation shall give most stable carbonium ion? A. B. C. D.

Which of the following is more stable complex and why? [Co(NH3)6]3+ and [Co(en)3]3+ -Chemistry

Description : Which of the following is more stable complex and why? [Co(NH3)6]3+ and [Co(en)3]3+ -Chemistry

Last Answer : Co(en)3]3+ is more stable complex than [CO(NH3)6]3+ because of chelate effect.

Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has – (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge

Description : Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has – (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge

Last Answer : (3) stable half filled 2p sub level Explanation: Ionization energy is a measure of the ease in which atoms lose electrons and become positive ions.

Inert gases are - (1) Miscible with water (2) Not stable (3) Chemically uncreative (4) Chemically very active

Description : Inert gases are - (1) Miscible with water (2) Not stable (3) Chemically uncreative (4) Chemically very active

Last Answer : (3) Chemically uncreative Explanation: An inert gas is a gas which does not undergo chemical reactions since their valence shells are filled, meaning they don't normally form chemical bonds with other ... inert gases, also called noble gases, are argon, helium, neon, krypton, xenon and radon.

The number of electrons in the outer shell of the most stable or inert atoms is (1) 1 (2) 5 (3) 3 (4) 8

Description : The number of electrons in the outer shell of the most stable or inert atoms is (1) 1 (2) 5 (3) 3 (4) 8

Last Answer : (4) 8 Explanation: The innermost shell has a maximum of two electrons, but the next two electron shells can each have a maximum of eight electrons.

Uranium eventually decays into a stable isotope of — (1) Radium (2) Thorium (3) Lead (4) Polonium

Description : Uranium eventually decays into a stable isotope of — (1) Radium (2) Thorium (3) Lead (4) Polonium

Last Answer : (3) Lead Explanation: Natural uranium consists of three major isotopes: U238 (99.28% natural abundance), U235 (0.71%), and U234 (0.0054%). All three are radioactive, emitting alpha particles, with ... has 18 members, all of which eventually decay into Pb206, by a variety of different decay paths.

Which one is more stable structure of benzene among Kekule and Dewar’s structures?

Description : Which one is more stable structure of benzene among Kekule and Dewar’s structures?

Last Answer : Ans: Kekule’s structure.

Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why?

Description : Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why?

Last Answer : Ans. O2NCH2CH2O– is more stable than CH3CH2O– because NO2 group has –I effect and hence it tends to disperse the negative charge on the oxygen atom. In contrast, CH3CH2 has +I effect. It, therefore, tends to intensify the negative charge and hence destabilizes it.

Assign the reason for the following: (a) Enthalpy of fusion of water is higher as compared to the hydrides of Sulphur & Selenium. (b) Water is quite stable and does not dissociate in to its elements even at high temperature.

Description : Assign the reason for the following: (a) Enthalpy of fusion of water is higher as compared to the hydrides of Sulphur & Selenium. (b) Water is quite stable and does not dissociate in to its elements even at high temperature.

Last Answer : Ans-a) Due hydrogen bond it has high latent heat of fusion b) Water is a stable compound and its decomposition is not thermodynamically feasible

which is the most stable isotope of Hydrogen?

Description : which is the most stable isotope of Hydrogen?

Last Answer : Ans. Protium

What is the sign of enthalpy of formation of highly stable compound?

Description : What is the sign of enthalpy of formation of highly stable compound?

Last Answer : Ans. Negative.

Why Mn+2 is more stable than Mn+3 but Fe +3 is more stable than Fe+2 ?

Description : Why Mn+2 is more stable than Mn+3 but Fe +3 is more stable than Fe+2 ?

Last Answer : Ans Mn+2 has half filled d- orbital ,therefore it is more stable than Mn+3 Fe+3 has half filled d- orbital, therefore it is more stable than Fe +2 . 

Give reasons : (a) Diamond and rhombic Sulphur are covalent solids, but the latter has lower melting points. (b) Among NaCl and CsCl, CsCl is quite stable.

Description : Give reasons : (a) Diamond and rhombic Sulphur are covalent solids, but the latter has lower melting points. (b) Among NaCl and CsCl, CsCl is quite stable.

Last Answer : (a) Due to weak Vander Waal’s Force in Sulphur molecule. (b) CsCl coordination number is 8. It is surrounded by 8 anion tightly. 

Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta attachment of the electrophile. (c) the less stable resonance hybrid occurs with meta attachment of the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position

Description : Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta ... the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position

Last Answer : the more stable resonance hybrid occurs with meta attachment of the electrophile.

The most stable conformation of cyclohexane is the : (a) Haworth form (b) Boat form (c) Newman form (d) Chair form

Description : The most stable conformation of cyclohexane is the : (a) Haworth form (b) Boat form (c) Newman form (d) Chair form

Last Answer : Chair form

Which of the following acid-derivatives are most stable? (a) Acid chlorides (b) Esters (c) Amides (d) Anhydrides

Description : Which of the following acid-derivatives are most stable? (a) Acid chlorides (b) Esters (c) Amides (d) Anhydrides

Last Answer : Amides

Which of the following is not a possible reaction of a carbocation? (a) addition of a nucleophile (b) rearrangement to a more stable carbocation (c) addition of a proton to form an alkane (d) loss of a β-hydrogen to form an alkene

Description : Which of the following is not a possible reaction of a carbocation? (a) addition of a nucleophile (b) rearrangement to a more stable carbocation (c) addition of a proton to form an alkane (d) loss of a β-hydrogen to form an alkene

Last Answer : addition of a proton to form an alkane

Which of the following has two equatorial alkyl substituents in its most stable conformation? (a) 1,1-dimethylcyclohexane (b) cis-1,2-dimethylcyclohexane (c) cis-1,3-diethylcyclohexane (d) cis-1,4-diethylcyclohexane

Description : Which of the following has two equatorial alkyl substituents in its most stable conformation? (a) 1,1-dimethylcyclohexane (b) cis-1,2-dimethylcyclohexane (c) cis-1,3-diethylcyclohexane (d) cis-1,4-diethylcyclohexane

Last Answer : cis-1,3-diethylcyclohexane

Which of the following is the most stable alkene? (a) trans-3-hexene(b) cis-3-hexene(c) 1-hexene(d) (Z)-3-hexene

Description : Which of the following is the most stable alkene? (a) trans-3-hexene (b) cis-3-hexene (c) 1-hexene (d) (Z)-3-hexene

Last Answer : trans-3-hexene

Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with the least number of substituents? (a) the reaction is resonance stabilized. (b) the hybrid geometry favors this process. (c) nucleophile tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.

Description : Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with the least number of substituents? (a) the reaction is resonance stabilized. (b) the hybrid geometry favors this ... tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.

Last Answer : a more stable carbonium ion is generated.

The stronger the acid __________. (a) the less stable its conjugate base (b) the larger the pKa (c) the weaker its conjugate base (d) the larger the pH

Description : The stronger the acid __________. (a) the less stable its conjugate base (b) the larger the pKa (c) the weaker its conjugate base (d) the larger the pH

Last Answer : the weaker its conjugate base

Which of the following is incorrect? (a) Resonance stabilization is the extra stability a compound gains from having delocalized electrons. (b) Delocalized electrons destabilize a compound. (c) The greater the number of relatively stable resonance contributors, the greater is the resonance stabilization(d) (a) and (c).

Description : Which of the following is incorrect? (a) Resonance stabilization is the extra stability a compound gains from having delocalized electrons. (b) Delocalized electrons destabilize a compound. (c) The greater ... stable resonance contributors, the greater is the resonance stabilization. (d) (a) and (c)

Last Answer : Delocalized electrons destabilize a compound

Which statement is true? (a) Resonance hybrids are inherently unstable. (b) Resonance hybrids are more stable than any individual resonance form. (c) Resonance hybrids are averages of all resonance forms resembling the less stable forms. (d) Resonance hybrids are averages of all resonance forms resembling the more stable forms.

Description : Which statement is true? (a) Resonance hybrids are inherently unstable. (b) Resonance hybrids are more stable than any individual resonance form. (c) Resonance hybrids are averages of all resonance ... forms. (d) Resonance hybrids are averages of all resonance forms resembling the more stable forms.

Last Answer : Resonance hybrids are averages of all resonance forms resembling the more stable forms.

For stable molecule the Value of bond order must be.... a) Negative b) Positive c) 0 d) There is no relationship between stability and bond order

Description : For stable molecule the Value of bond order must be.... a) Negative b) Positive c) 0 d) There is no relationship between stability and bond order

Last Answer : b) Positive

Which of the following is the same for both radioactive iodine and stable iodine? w) number of neutrons x) mass number y) half-life z) chemical properties

Description : Which of the following is the same for both radioactive iodine and stable iodine? w) number of neutrons x) mass number y) half-life z) chemical properties

Last Answer : ANSWER: Z -- CHEMICAL PROPERTIES

Which of the STABLE Group IA elements will have the lowest melting point?

Description : Which of the STABLE Group IA elements will have the lowest melting point?

Last Answer : ANSWER: CESIUM

At temperatures above 96 degrees Celsius, which crystalline form of sulfur is the most stable?

Description : At temperatures above 96 degrees Celsius, which crystalline form of sulfur is the most stable?

Last Answer : ANSWER: MONOCLINIC

Inert gases are (1) Miscible with water (2) Not stable (3) Chemically unreactive (4) Chemically very active

Description : Inert gases are (1) Miscible with water (2) Not stable (3) Chemically unreactive (4) Chemically very active

Last Answer : Chemically unreactive

Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge

Description : Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge

Last Answer : stable half filled 2p sub level

Uranium eventually decays into a stable isotope of – (1) Radium (2) Thorium (3) Lead (4) Polonium

Description : Uranium eventually decays into a stable isotope of – (1) Radium (2) Thorium (3) Lead (4) Polonium

Last Answer : Lead

Helium gas is used in gas balloons instead of hydrogen gas because it is (1) lighter than hydrogen (2) more abundant than hydrogen (3) non-combustible (4) more stable

Description : Helium gas is used in gas balloons instead of hydrogen gas because it is (1) lighter than hydrogen (2) more abundant than hydrogen (3) non-combustible (4) more stable 

Last Answer : non-combustible