(A) Ether behaves as bases in the presence of mineral acids. (R ) Due to the presence of lone pair of electrons on oxygen.

(A) Ether behaves as bases in the presence of mineral acids. (R ) Due to the presence of lone pair of electrons on oxygen.
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(A) Ether behaves as bases in the presence of mineral acids. (R ) Due to the presence of lone pair of ... R is false D. A is false but R is true
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(A) Ether behaves as bases in the presence of mineral acids. (R ) Due to the presence of lone pair of electrons on oxygen.

Description : (A) Ether behaves as bases in the presence of mineral acids. (R ) Due to the presence of lone pair of electrons on oxygen.

Last Answer : (A) Ether behaves as bases in the presence of mineral acids. (R ) Due to the presence of lone pair of ... R is false D. A is false but R is true

Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom more available for protonation. (c) the presence of CH3 group sterically hinders the protonation of the NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Description : Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) ... NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Last Answer : the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation

Total number of lone pair of electrons around oxygens in diethyl peroxide `is//are`

Description : Total number of lone pair of electrons around oxygens in diethyl peroxide `is//are`

Last Answer : Total number of lone pair of electrons around oxygens in diethyl peroxide `is//are` A. 2 B. 3 C. 4 D. 0

The lone pair of electrons at one of the ring nitrogens in the given amino acid makes a potential ligand, which is important in binding the iron atoms in hemoglobin: (A) Tryptophan (B) Threonine (C) Histidine (D) Serine

Description : The lone pair of electrons at one of the ring nitrogens in the given amino acid makes a potential ligand, which is important in binding the iron atoms in hemoglobin: (A) Tryptophan (B) Threonine (C) Histidine (D) Serine

Last Answer : Answer : C

Pyridine is less basic than trimethylamine because the lone-pair of electrons on N-atom in pyridine resides in (a) sp2 hybrid orbital (b) sp hybrid orbital (c) sp3 hybrid orbita(d) p-orbitall

Description : Pyridine is less basic than trimethylamine because the lone-pair of electrons on N-atom in pyridine resides in (a) sp2 hybrid orbital (b) sp hybrid orbital (c) sp3 hybrid orbital (d) p-orbital

Last Answer : sp2 hybrid orbita

Pyrrole is less basic than pyridine because the lone-pair of electrons on Natom in pyrrole (a) is part of the delocalized π molecular orbital. (b) is not part of the delocalized π molecular orbital. (c) resides in sp2 hybrid orbital (d) resides in sp hybrid orbital

Description : Pyrrole is less basic than pyridine because the lone-pair of electrons on Natom in pyrrole (a) is part of the delocalized π molecular orbital. (b) is not part of the delocalized π molecular orbital. (c) resides in sp2 hybrid orbital (d) resides in sp hybrid orbital

Last Answer : is part of the delocalized π molecular orbital.

The lone-pair electrons of the methyl anion occupy a __________ orbital. (a) s (b) sp (c) sp2 (d) sp3

Description : The lone-pair electrons of the methyl anion occupy a __________ orbital. (a) s (b) sp (c) sp2 (d) sp3

Last Answer : sp3

Which of the following statements is correct regarding nucleophiles? (a) They have an overall positive charge(b) They have a lone-pair of electrons(c) They have an unpaired electron(d) They have empty orbitals

Description : Which of the following statements is correct regarding nucleophiles? (a) They have an overall positive charge (b) They have a lone-pair of electrons (c) They have an unpaired electron (d) They have empty orbitals

Last Answer : (b) They have a lone-pair of electrons

Which of the following species is non polar with presence of polar bond and lone pair of electron on central atom.

Description : Which of the following species is non polar with presence of polar bond and lone pair of electron on central atom.

Last Answer : Which of the following species is non polar with presence of polar bond and lone pair of electron on central atom. A. ... 4)` C. `XeF_(4)` D. `CF_(4)`

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

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

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

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

(3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning "light", and generally implies radiance, gloss, or brilliance. Metals in general have high electrical conductivity, high thermal conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Description : (3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word ... conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Last Answer : Cloud is a colloidal dispersion of – (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air

Ethylene reacts with oxygen in the presence of silver catalyst at 300°C to form (a) Diethyl ether (b) Ethylene glycol (c) Ethyl alcoho(d) Ethylene oxidel

Description : Ethylene reacts with oxygen in the presence of silver catalyst at 300°C to form (a) Diethyl ether (b) Ethylene glycol (c) Ethyl alcohol (d) Ethylene oxide

Last Answer : Ethylene oxide

Shape of molecule having 4- bond pair and one lone pair is :-

Description : Shape of molecule having 4- bond pair and one lone pair is :-

Last Answer : Shape of molecule having 4- bond pair and one lone pair is :- A. Trigonal bipyramidal B. T-shape C. See-saw D. Square planar

In which type of molecule, the dipole moment may be nonzero (L `to` Lone pair ) :-

Description : In which type of molecule, the dipole moment may be nonzero (L `to` Lone pair ) :-

Last Answer : In which type of molecule, the dipole moment may be nonzero (L `to` Lone pair ) :- A. `AB_(2)L_(2)` B. `AB_(2)L_(3)` C. `AB_(4)L_(2)` D. `AB_(4)`

The molecules which contain `sigma` bond , `pi` bond and lone pair `1:1:1` ratio :-

Description : The molecules which contain `sigma` bond , `pi` bond and lone pair `1:1:1` ratio :-

Last Answer : The molecules which contain `sigma` bond , `pi` bond and lone pair `1:1:1` ratio :- A. `C_(2)N_(2) ... methane ) D. `C_(3)O_(2)` ( Carbon suboxide )

In which of the following cases lone-pair is involved in resonance :

Description : In which of the following cases lone-pair is involved in resonance :

Last Answer : In which of the following cases lone-pair is involved in resonance :

a=difference in the oxidation number of Cl in the product X and product Y, respectively b= total number of atom in X and Y c=total number of lone pair

Description : a=difference in the oxidation number of Cl in the product X and product Y, respectively b= total number of atom in X and Y c=total number of lone pair

Last Answer : a=difference in the oxidation number of Cl in the product X and product Y, respectively b= total number of ... lone pair in X then calculate a+b+c = ?

What effect does a lone pair have on molecular shape?

Description : What effect does a lone pair have on molecular shape?

Last Answer : An extra lone pair or two could decrease the amount of bonding angles of the central atom, which'll change the shape of a molecule.

What is lone pair?

Description : What is lone pair?

Last Answer : A lone pair is elements in a chemical reaction that are not used in the reaction.

What is lone pair?

Description : What is lone pair?

Last Answer : A lone pair is elements in a chemical reaction that are not used in the reaction.

The electronic repulsion is maximum between (a) Shared pair - shared pair (b) Shared pair - lone pair (c) Lone pair - lone pair (d) None of these

Description : The electronic repulsion is maximum between (a) Shared pair - shared pair (b) Shared pair - lone pair (c) Lone pair - lone pair (d) None of these

Last Answer : Ans:(c)

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

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

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons. (A) Lack of free (B) Excess of (C) Decrease in (D) None of these

Description : A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons. (A) Lack of free (B) Excess of (C) Decrease in (D) None of these

Last Answer : (B) Excess of

The number of lone pairs of electrons present in central atom of `CIF_3` 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:

The number of lone pairs of electrons present on Xe in `XeF_(2)` ?

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

The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is

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

In `OF_2`, the number of bond pairs and lone pairs of electrons are respectively,

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

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?

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 ?

How many lone pairs of electrons exist on the central atom in ammonia?

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.

For each pair of electrons passing from NADH located inside the mitochondria to oxygen, how many ATP molecules can be generated? A.1 B.2 C.3 D.4

Description : For each pair of electrons passing from NADH located inside the mitochondria to oxygen, how many ATP molecules can be generated? A.1 B.2 C.3 D.4

Last Answer : C.3

For each pair of electrons passing from NADH located inside the mitochondriato oxygen, how many ATP molecules can be generated? A- 1 B- 2 C- 3 D- 4

Description : For each pair of electrons passing from NADH located inside the mitochondria to oxygen, how many ATP molecules can be generated? A- 1 B- 2 C- 3 D- 4

Last Answer : 3

The pair of compounds used as anesthetic in medicines – (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Description : The pair of compounds used as anesthetic in medicines – (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Last Answer : (2) Nitrous oxide, Chloroform Explanation: Nitrous oxide is one of the more well-known anesthetic gases, and has been in use for around 200 years. Unlike some other anesthetics, this compound ... than ether. Its use as an anaesthetic decreased with increased experience and knowledge of its dangers.

The pair of compounds used as anaesthetic in medicines : (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Description : The pair of compounds used as anaesthetic in medicines : (1) Ether, Ammonia (2) Nitrous oxide, Chloroform (3) Chloroform, Nitrogen dioxide (4) Nitrogen dioxide, ether

Last Answer : Nitrous oxide, Chloroform

At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) (A) μ° + RT ln f (B) μ°+ R ln f (C) μ° + T ln f (D) μ° + R/T ln f

Description : At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm. ... (B) μ°+ R ln f (C) μ° + T ln f (D) μ° + R/T ln f

Last Answer : (A) μ° + RT ln f

To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (∆HV/R) (1/T1- 1/T2) from the exact Clapeyron equation, it is assumed that the (A) Volume of the liquid phase is negligible compared to that of vapour phase (B) Vapour phase behaves as an ideal gas (C) Heat of vaporisation is independent of temperature (D) All (A), (B) & (C)

Description : To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (∆HV/R) (1/T1- 1/T2) from the exact Clapeyron equation, it is assumed that the (A) Volume of the liquid phase is negligible compared to ... gas (C) Heat of vaporisation is independent of temperature (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

At ______ frequencies the parallel R-L circuit behaves as purely resistive.

Description : At ______ frequencies the parallel R-L circuit behaves as purely resistive.

Last Answer : At very high frequencies the parallel R-L circuit behaves as purely resistive.

At very low frequencies a series R-C circuit behaves as almost purely?

Description : At very low frequencies a series R-C circuit behaves as almost purely?

Last Answer : At very low frequencies a series R-C circuit behaves as almost purely capacitive.

Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause (A) Explosion(B) Non biodegradable foam(C) Undesirable plant growth(D) Corrosion

Description : Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause (A) Explosion (B) Non biodegradable foam (C) Undesirable plant growth (D) Corrosion

Last Answer : (A) Explosion

Use of morphine in preanaesthetic medication: A. Is routine except in the presence of contraindications B. Is restricted to patients being anaesthetised with ether C. Should be made only in combination with atropine D. Is restricted mostly to patients in pain preoperativel

Description : Use of morphine in preanaesthetic medication: A. Is routine except in the presence of contraindications B. Is restricted to patients being anaesthetised with ether C. Should be made only in combination with atropine D. Is restricted mostly to patients in pain preoperativel

Last Answer : D. Is restricted mostly to patients in pain preoperatively

The radioactivity of uranium mineras is usually more in comparison to pure uranium. This is due to presence of … in the mineral.

Description : The radioactivity of uranium mineras is usually more in comparison to pure uranium. This is due to presence of … in the mineral.

Last Answer : The radioactivity of uranium mineras is usually more in comparison to pure uranium. This is due to ... . actinium B. thorium C. radium D. plutonium

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its (A) Poor oxidation stability and high gum forming tendency (B) Greater tendency of decomposition at elevated temperature (C) Hydrolysis tendency in presence of water (D) All (A), (B) and (C)

Description : Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its (A) Poor oxidation stability and high gum forming ... at elevated temperature (C) Hydrolysis tendency in presence of water (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Acidity in water is caused due to (A) Mineral acids (B) Free CO2 (C) Iron sulphate (D) All the above

Description : Acidity in water is caused due to  (A) Mineral acids  (B) Free CO2 (C) Iron sulphate  (D) All the above 

Last Answer : (D) All the above 

Which sequence of RNA bases with pair up with a strand of DNA bases that reads TACTGCA?

Description : Which sequence of RNA bases with pair up with a strand of DNA bases that reads TACTGCA?

Last Answer : color

What four properties that acids and bases have in common?

Description : What four properties that acids and bases have in common?

Last Answer : Feel Free to Answer

Why do acids and bases make good electrical conductors when dissolved in water?

Description : Why do acids and bases make good electrical conductors when dissolved in water?

Last Answer : Acids, bases, and salts are ionically bonded and easily separate into oppositely charged free ions in water solution. Both the positive and negative ions then act as charge carriers, moving in response to an applied electric field thus facilitating electrical conductivity.

Most liquids that conduct electricity are solutions of acids, bases and ______. Salts Who is known as the father of modern chemistry?

Description : Most liquids that conduct electricity are solutions of acids, bases and ______. Salts Who is known as the father of modern chemistry?

Last Answer : Antoine Lavoisier

Degeneracy of the genetic code denotes the existence of (A) Base triplets that do not code for any amino acids (B) Codons consisting of only two bases (C) Codons that include one or more of the unusual bases (D) Multiple codons for a single amino acid

Description : Degeneracy of the genetic code denotes the existence of (A) Base triplets that do not code for any amino acids (B) Codons consisting of only two bases (C) Codons that include one or more of the unusual bases (D) Multiple codons for a single amino acid

Last Answer : Answer : B

Nucleotides required for the synthesis of nucleic acids can be obtained from (A) Dietary nucleic acids and nucleotides (B) De novo synthesis (C) Salvage of pre-existing bases and nucleosides (D) De novo synthesis and salvage

Description : Nucleotides required for the synthesis of nucleic acids can be obtained from (A) Dietary nucleic acids and nucleotides (B) De novo synthesis (C) Salvage of pre-existing bases and nucleosides (D) De novo synthesis and salvage

Last Answer : Answer : D

Amino acids provide the nitrogen for the synthesis of (A) The bases of the phospholipids (B) Uric acid (C) Glycolipids (D) Chondroitin sulphates

Description : Amino acids provide the nitrogen for the synthesis of (A) The bases of the phospholipids (B) Uric acid (C) Glycolipids (D) Chondroitin sulphates

Last Answer : Answer : A