Point group D3h belong to the molecule a. BF3 b. NH3 c. CHCl3 d. CH3

Point group D3h belong to the molecule
a. BF3
b. NH3
c. CHCl3
d. CH3
by

1 Answer

Answer :

a. BF3
by

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Point group C2v belong to the molecule a. H2O b. BeH2 c. NH3 d. C2H2

Description : Point group C2v belong to the molecule a. H2O b. BeH2 c. NH3 d. C2H2

Last Answer : a. H2O

Identify type of the intermolecular forces in the following compounds. a. CH3 – OH  b. CH2 = CH2 c. CHCl3

Description : Identify type of the intermolecular forces in the following compounds. a. CH3 – OH  b. CH2 = CH2 c. CHCl3

Last Answer : Identify type of the intermolecular forces in the following compounds. a. CH3 – OH b. CH2 = CH2 c. CHCl3 d. CH2Cl2

Out of NH3 & BF3 Which is polar & Why?

Description : Out of NH3 & BF3 Which is polar & Why?

Last Answer : Ans. NH3 has net dipole moment because resultant of 3N-H bond & lone pair lie in the same direction. While BF3 being trigonal planar has zero dipole moment.

Which of the following molecules has a dipole moment? w) BF3 x) NH3 y) CCL4 z) CH4

Description : Which of the following molecules has a dipole moment? w) BF3 x) NH3 y) CCL4 z) CH4

Last Answer : ANSWER: B -- NH3

Which of the following molecules does NOT have a dipole moment of zero? w) BeCl2 x) BF3 y) CO2 z) NH3

Description : Which of the following molecules does NOT have a dipole moment of zero? w) BeCl2 x) BF3 y) CO2 z) NH3

Last Answer : ANSWER: Z -- NH3

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

How many bonding and non-bonding electron pairs are found in the BF3 molecule? A 1 bonding and 3 non-bonding B 2 bonding and 2 non-bonding C 3 bonding and 1 non-bonding D 3 bonding and 0 non-bonding E 4 bonding and 0 non-bonding

Description : How many bonding and non-bonding electron pairs are found in the BF3 molecule? A 1 bonding and 3 non-bonding B 2 bonding and 2 non-bonding C 3 bonding and 1 non-bonding D 3 bonding and 0 non-bonding E 4 bonding and 0 non-bonding

Last Answer : D 3 bonding and 0 non-bonding  

For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? w) CH4 x) SF6 y) BF3 z) PCL5

Description : For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? w) CH4 x) SF6 y) BF3 z) PCL5

Last Answer : ANSWER: B -- CH4

From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask. (a) CH4, H2, NH3 and water vapor at 800°C (b) CH3, H2, NH4 and water vapor at 800°C (c) CH4, H2, NH3 and water vapor at 600°C (d) CH3, H2, NH3 and water vapor at 600°C

Description : From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask. (a) CH4, H2, NH3 and water vapor at 800°C (b) CH3, H2, NH4 and water vapor at 800°C (c) CH4, H2, NH3 and water vapor at 600°C (d) CH3, H2, NH3 and water vapor at 600°C

Last Answer : a) CH4, H2, NH3 and water vapor at 800°C

Urea is represented as (A) NH2 .CO.NH2 (B) NH3CO.CH3 (C) NH.CO2 .NH (D) NH3 .CO2 .NH3

Description : Urea is represented as (A) NH2 .CO.NH2 (B) NH3CO.CH3 (C) NH.CO2 .NH (D) NH3 .CO2 .NH3

Last Answer : (A) NH2 .CO.NH2

Point group C2h belong to the molecule a. H2O b. BeH2 c. Cis C2H4 d. Trans C2H4

Description : Point group C2h belong to the molecule a. H2O b. BeH2 c. Cis C2H4 d. Trans C2H4

Last Answer : d. Trans C2H4

Which of the following will have the lowest boiling point? (a) CH3Cl (b) CH4 (c) CH2Cl2 (d) CHCl3

Description : Which of the following will have the lowest boiling point? (a) CH3Cl (b) CH4 (c) CH2Cl2 (d) CHCl3

Last Answer : CH4

Which molecule is more likely to exist in nature a molecule of CH3 or a molecule of CH4 Explain?

Description : Which molecule is more likely to exist in nature a molecule of CH3 or a molecule of CH4 Explain?

Last Answer : The molecule of methane is more stable, carbon is tetravalent.

Hinge region, the region of Ig molecule which is flexible and more exposed to enzymes is the (A) Region between first and second constant regions of H chain (domains CH1 and CH2) (B) Region between second and third constant regions of H chain (CH2 and CH3) (C) Variable regions of H chain (D) Variable regions of L chain

Description : Hinge region, the region of Ig molecule which is flexible and more exposed to enzymes is the (A) Region between first and second constant regions of H chain (domains CH1 and CH2) (B) Region between second and ... H chain (CH2 and CH3) (C) Variable regions of H chain (D) Variable regions of L chain

Last Answer : Answer : A

Which of the following is a nonpolar molecule? (a) HCl (b) CH3Cl (c) H2 (d) NH3

Description : Which of the following is a nonpolar molecule? (a) HCl (b) CH3Cl (c) H2 (d) NH3

Last Answer : H2

Which of the following reagents will react with pyrrole to form 2- formylpyrrole? (a) HCOOH (b) CHCl3/KOH (c) H2O2 (d) (CH3CO)2O/SnCl4

Description : Which of the following reagents will react with pyrrole to form 2- formylpyrrole? (a) HCOOH (b) CHCl3/KOH (c) H2O2 (d) (CH3CO)2O/SnCl4

Last Answer : CHCl3/KOH

Anisole is formed when phenol is treated with (a) CH3I/NaOH (b) CH3CH2I/NaOH (c) CHCl3/NaOH (d) Acetic anhydride

Description : Anisole is formed when phenol is treated with (a) CH3I/NaOH (b) CH3CH2I/NaOH (c) CHCl3/NaOH (d) Acetic anhydride

Last Answer : CH3I/NaOH

A primary amine can be identified by using (a) HCl (b) CHCl3 (c) NaOH (d) CHCl3 + KOH

Description : A primary amine can be identified by using (a) HCl (b) CHCl3 (c) NaOH (d) CHCl3 + KOH

Last Answer : CHCl3 + KOH

Marsh gas mainly contains (a) CH2=CH2 (b) CH4 (c) H2S (d) CHCl3

Description : Marsh gas mainly contains (a) CH2=CH2 (b) CH4 (c) H2S (d) CHCl3

Last Answer : CH4

Which of the following are Lewis bases? (a) NF3 (b) BF3 (c) CH3OCH3 (d) (a) and (c

Description : Which of the following are Lewis bases? (a) NF3 (b) BF3 (c) CH3OCH3 (d) (a) and (c

Last Answer : (a) and (c

Which of the following is a nucleophile? (a) AlCl3 (b) H3O+ (c) BF3 (d) CN–

Description : Which of the following is a nucleophile? (a) AlCl3 (b) H3O+ (c) BF3 (d) CN–

Last Answer : CN–

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

13. Which one of the following pairs is isostructural (i.e. having the same shape and hybridization)? (1) 4 4 [BF and NH ]   (2) 3 3 [BCl and BaCl ] (3) 3 3 [NH and NO ]  (4) [NF3 and BF3 ] Sol: [1] In both the compounds, central atom i

Description : 13. Which one of the following pairs is isostructural (i.e. having the same shape and hybridization)? (1) 4 4 [BF and NH ]   (2) 3 3 [BCl and BaCl ] (3) 3 3 [NH and NO ]  (4) [NF3 and BF3 ] Sol: [1] In both the compounds, central atom i

Last Answer : (1) 4 4 [BF and NH ]  

Write the IUPAC name for: (CH3)2CHCH(OH)CH2C(CH3)3,identify the functional group and type of compound.

Description : Write the IUPAC name for: (CH3)2CHCH(OH)CH2C(CH3)3,identify the functional group and type of compound.

Last Answer : Ans. 2,5,5-trimethylhexan-3-ol, alcohol, secondary alcohol

Rank the following substances in order of increasing boiling point (lowest → highest): (1) CH3CH2CH2CH2OH, (2) (CH3)2CHOCH3, (3) (CH3)3COH (a) (1) < (2) < (3) (b) (2) < (1) < (3) (c) (2) < (3) < (1) (d) (3) < (2) < (1)

Description : Rank the following substances in order of increasing boiling point (lowest → highest): (1) CH3CH2CH2CH2OH, (2) (CH3)2CHOCH3, (3) (CH3)3COH (a) (1) < (2) < (3) (b) (2) < (1) < (3) (c) (2) < (3) < (1) (d) (3) < (2) < (1)

Last Answer : (2) < (3) < (1)

Is CHCl3 polar bond?

Description : Is CHCl3 polar bond?

Last Answer : Chloroform has a low polar covalent bond.

Is KOC(CH3)3 equivalent to KOH as a base in chemical equations?

Description : Is KOC(CH3)3 equivalent to KOH as a base in chemical equations?

Last Answer : This depends completely on the equation in question. For instance, both are strong bases, so if that's all you're worried about, yeah, they're about equivalent. But potassium tert-butoxide is way bulkier ... not in others. Those are the big differences that jump out to me, but there may be others.

Which of the following compounds will dissolve in aqueous NaOH after undergoing reaction with Hinsberg reagent? (a) CH3CH2NH2 (b) (CH3CH2)2NH (c) (CH3CH2)3N (d) (CH3)3N

Description : Which of the following compounds will dissolve in aqueous NaOH after undergoing reaction with Hinsberg reagent? (a) CH3CH2NH2 (b) (CH3CH2)2NH (c) (CH3CH2)3N (d) (CH3)3N

Last Answer : CH3CH2NH2

Which of the following terms best describes the compound below? CH3(CH2)26CO2CH2(CH2)32CH3 (a) a fa(b) a wax (c) a terpene (d) an unsaturated triglyceridet

Description : Which of the following terms best describes the compound below? CH3(CH2)26CO2CH2(CH2)32CH3 (a) a fat (b) a wax (c) a terpene (d) an unsaturated triglyceride

Last Answer : a wax

Which of the following terms best describes the compound below? CH3(CH2)7CH=CH(CH2)7CO2H (a) an unsaturated fatty acid (b) a triglyceride (c) a synthetic detergent (d) a micelle

Description : Which of the following terms best describes the compound below? CH3(CH2)7CH=CH(CH2)7CO2H (a) an unsaturated fatty acid (b) a triglyceride (c) a synthetic detergent (d) a micelle

Last Answer : an unsaturated fatty acid

Which of the following terms best describes the compound below? CH3(CH2)12CO2H (a) a fatty acid (b) an oil (c) a wax (d) a soap

Description : Which of the following terms best describes the compound below? CH3(CH2)12CO2H (a) a fatty acid (b) an oil (c) a wax (d) a soap

Last Answer : a fatty acid

CH3(CH2)4 is the sodium salt of hexanoic acid. The water solubility of this salt is : (a) higher than that of hexanoic acid (b) lower than that of hexanoic acid (c) completely insoluble (d) not predictable

Description : CH3(CH2)4 is the sodium salt of hexanoic acid. The water solubility of this salt is : (a) higher than that of hexanoic acid (b) lower than that of hexanoic acid (c) completely insoluble (d) not predictable

Last Answer : higher than that of hexanoic acid

Which of the following is closest to the C–O–C bond angle in CH3–O–CH3? (a) 180° (b) 120° (c) 109.5° (d) 90°

Description : Which of the following is closest to the C–O–C bond angle in CH3–O–CH3? (a) 180° (b) 120° (c) 109.5° (d) 90°

Last Answer : 109.5°

Which of the following is sec-butyl alcohol? (a) CH3CH2CH2CH2OH (b) CH3CH(OH)CH2CH3 (c) (CH3)2CHCH2OH (d) (CH3)2CHOH

Description : Which of the following is sec-butyl alcohol? (a) CH3CH2CH2CH2OH (b) CH3CH(OH)CH2CH3 (c) (CH3)2CHCH2OH (d) (CH3)2CHOH

Last Answer : CH3CH(OH)CH2CH3

What is the IUPAC name for the following structure? CH3CH(CH3)CH2CH(OH)CH3 (a) 4-methyl-2-pentanol (b) 2-methyl-2-hexanol (c) 2-methyl-4-pentanol (d) 2-methyl-3-pentanol

Description : What is the IUPAC name for the following structure? CH3CH(CH3)CH2CH(OH)CH3 (a) 4-methyl-2-pentanol (b) 2-methyl-2-hexanol (c) 2-methyl-4-pentanol (d) 2-methyl-3-pentanol

Last Answer : 4-methyl-2-pentanol

Which of the following is most resistant to oxidation? (a) CH3CH2OH (b) (CH3)2CHOH (c) HOCH2CH2OH (d) (CH3)3COH

Description : Which of the following is most resistant to oxidation? (a) CH3CH2OH (b) (CH3)2CHOH (c) HOCH2CH2OH (d) (CH3)3COH

Last Answer : (CH3)3COH

The compound which reacts most readily with Lucas reagent is (a) CH3CH2Cl (b) (CH3)2CHOH (c) CH3CH2OH (d) (CH3)3COH

Description : The compound which reacts most readily with Lucas reagent is (a) CH3CH2Cl (b) (CH3)2CHOH (c) CH3CH2OH (d) (CH3)3COH

Last Answer : (CH3)3COH

Which of the following halides is least reactive in an E2 reaction with sodium methoxide? (a) (CH3)3CCH2I (b) (CH3)2CHCHICH3 (c) (CH3)2CHCH2Br (d) (CH3)2CHCH2Cl

Description : Which of the following halides is least reactive in an E2 reaction with sodium methoxide? (a) (CH3)3CCH2I (b) (CH3)2CHCHICH3 (c) (CH3)2CHCH2Br (d) (CH3)2CHCH2Cl

Last Answer : (CH3)3CCH2I

Which of the following halides is most reactive in an E2 reaction with sodium methoxide? (a) (CH3)3CCH2I (b) (CH3)2CHCHICH3 (c) (CH3)2CHCH2Br (d) (CH3)2CHCH2C

Description : Which of the following halides is most reactive in an E2 reaction with sodium methoxide? (a) (CH3)3CCH2I (b) (CH3)2CHCHICH3 (c) (CH3)2CHCH2Br (d) (CH3)2CHCH2C

Last Answer : (CH3)2CHCHICH3

Which of the following compounds will undergo an SN2 reaction most readily? (a) (CH3)3CCH2I (b) (CH3)3CCl (c) (CH3)2CHI (d) (CH3)2CHCH2CH2CH2I

Description : Which of the following compounds will undergo an SN2 reaction most readily? (a) (CH3)3CCH2I (b) (CH3)3CCl (c) (CH3)2CHI (d) (CH3)2CHCH2CH2CH2I

Last Answer : (CH3)2CHCH2CH2CH2I

Which of the following is a secondary alkyl halide? (a) CH3Br(b) (CH3)3CBr (c) (CH3)2CHBr (d) (CH3)2CHCH2Br

Description : Which of the following is a secondary alkyl halide? (a) CH3Br (b) (CH3)3CBr (c) (CH3)2CHBr (d) (CH3)2CHCH2Br

Last Answer : (CH3)2CHBr

Which of the following compounds would react most rapidly in an SN2 reaction? (a) CH3CH2I (b) CH2=CH–I (c) (CH3)2CHI (d) (CH3)3CI

Description : Which of the following compounds would react most rapidly in an SN2 reaction? (a) CH3CH2I (b) CH2=CH–I (c) (CH3)2CHI (d) (CH3)3CI

Last Answer : CH3CH2I

Which of the following compounds has been suggested as causing depletion of the ozone layer in the upper stratosphere? (a) CH3(b) CCl2F2(c) CF4(d) CH2Cl2

Description : Which of the following compounds has been suggested as causing depletion of the ozone layer in the upper stratosphere? (a) CH4 (b) CCl2F2 (c) CF4 (d) CH2Cl2

Last Answer : CCl2F2

Predict which of the following alkenes reacts the fastest with HCl? (a) CH3CH2CH2CH2CH=CH2 (b) cis-CH3CH2CH=CHCH2CH3 (c) trans-CH3CH2CH=CHCH2CH3 (d) (CH3)2C=CHCH2CH3

Description : Predict which of the following alkenes reacts the fastest with HCl? (a) CH3CH2CH2CH2CH=CH2 (b) cis-CH3CH2CH=CHCH2CH3 (c) trans-CH3CH2CH=CHCH2CH3 (d) (CH3)2C=CHCH2CH3

Last Answer : (CH3)2C=CHCH2CH3

Hydration of 2-methyl-1-propene (with H2O/H2SO4) gives : (a) CH3CH2CH2OH (b) (CH3)3COH (c) CH3CH2CH2CH2OH (d) (CH3)2CHOH

Description : Hydration of 2-methyl-1-propene (with H2O/H2SO4) gives : (a) CH3CH2CH2OH (b) (CH3)3COH (c) CH3CH2CH2CH2OH (d) (CH3)2CHOH

Last Answer : (CH3)3COH

Which of the following compounds will react most readily with bromine in CCl4? (a) CH3CH2CH3 (b) (CH3)3CH (c) CH3CH=CH2 (d) (CH3)4C

Description : Which of the following compounds will react most readily with bromine in CCl4? (a) CH3CH2CH3 (b) (CH3)3CH (c) CH3CH=CH2 (d) (CH3)4C

Last Answer : CH3CH=CH2

Which of the following has the greatest solubility in CH3CH2CH2CH3? (a) CH3OH (b) CH3NH2 (c) CH3OCH3 (d) (CH3)3CH

Description : Which of the following has the greatest solubility in CH3CH2CH2CH3? (a) CH3OH (b) CH3NH2 (c) CH3OCH3 (d) (CH3)3CH

Last Answer : (CH3)3CH

Which of the following compounds show geometrical isomerism (a) (CH3)3N (b) CH3CH=CH2 (c) (CH3)2NH (d) CH3CH=CHCH

Description : Which of the following compounds show geometrical isomerism (a) (CH3)3N (b) CH3CH=CH2 (c) (CH3)2NH (d) CH3CH=CHCH

Last Answer : CH3CH=CHCH

What orbitals overlap to create the H–C bond in CH3+? (a) sp3–sp3 (b) sp2–sp3 (c) s–p (d) s–sp2

Description : What orbitals overlap to create the H–C bond in CH3+? (a) sp3–sp3 (b) sp2–sp3 (c) s–p (d) s–sp2

Last Answer : s–sp2

What is the predicted shape, bond angle, and hybridization for CH3+? (a) trigonal planar, 120°, sp2 (b) trigonal planar, 120°, sp3 (c) trigonal planar, 109.5°, sp2 (d) trigonal pyramidal, 120°, sp2

Description : What is the predicted shape, bond angle, and hybridization for CH3+? (a) trigonal planar, 120°, sp2 (b) trigonal planar, 120°, sp3 (c) trigonal planar, 109.5°, sp2 (d) trigonal pyramidal, 120°, sp2

Last Answer : trigonal planar, 120°, sp2