Which of the following compounds is the strongest base? w) NH3 x) PH3 y) H2O z) H2S

Which of the following compounds is the strongest base? w) NH3 x) PH3 y) H2O z) H2S
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ANSWER: W -- NH3
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Which of the following compounds is the strongest acid? w) NH3 x) PH3 y) H2O z) H2S

Description : Which of the following compounds is the strongest acid? w) NH3 x) PH3 y) H2O z) H2S

Last Answer : ANSWER: Z -- H2S

Which of the following compounds has the lowest boiling points? w) CH4 x) CCl4 y) PH3 z) PCl3

Description : Which of the following compounds has the lowest boiling points? w) CH4 x) CCl4 y) PH3 z) PCl3

Last Answer : ANSWER: W -- CH4

Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Description : Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Last Answer : Ans: i) Hydrogen bond is found in H2O but not in H2S.  ii) Hydrogen bond is found in NH3 but not in PH3.  iii) Because they have low ionization energy.

Which of the following pairs of compounds could NOT be used to create a buffer solution? Would it be: w) HCL and NaCl (read: H - C - L and N - A - C - L) x) HCN and NaCN (read: H - C - N and N - A - C - N) y) NH3 and NH4Cl (read: N - H - 3 and N - H - 4 - C - L) z) HNO2 and NaNO2 (read: H - N - O -2 and N - A - N - O - 2)

Description : Which of the following pairs of compounds could NOT be used to create a buffer solution? Would it be: w) HCL and NaCl (read: H - C - L and N - A - C - L) x) HCN and NaCN (read: H - C - N and N - A - C - N) y) NH3 ... - H - 4 - C - L) z) HNO2 and NaNO2 (read: H - N - O -2 and N - A - N - O - 2)

Last Answer : ANSWER: W -- HCL AND NaCl (read: H - C - L and N - A - C - L) 

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Description : Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry

Last Answer : (i) [CO(NH3)4 (H2O)Cl]Cl2 Tetraammine aquachlorido cobalt (III) chloride (ii) [CrCl2(en)2]Cl Dichlorobis (ethane-1, 2-diamine) chromium (III) chloride

Which is the correct order of decreasing acidity in the following compounds? A. H2O B. CH3CH3 C. NH3 D. CH2=CH2 E. HC≡CH (a) A > E > C > D > B (b) A > E > D > B > C (c) E > A > C > B > D (d) A > C > E > D > B

Description : Which is the correct order of decreasing acidity in the following compounds? A. H2O B. CH3CH3 C. NH3 D. CH2=CH2 E. HC≡CH (a) A > E > C > D > B (b) A > E > D > B > C (c) E > A > C > B > D (d) A > C > E > D > B

Last Answer : A > E > C > D > B

Which of the following molecules is linear? w) SO2 x) O3 y) XeF2 z) H2S

Description : Which of the following molecules is linear? w) SO2 x) O3 y) XeF2 z) H2S

Last Answer : ANSWER: Y -- XeF2

Which of the following is the strongest base? (a) HOMgBr (b) H2O (c) CH3OH (d) CH3MgBr

Description : Which of the following is the strongest base? (a) HOMgBr (b) H2O (c) CH3OH (d) CH3MgBr

Last Answer : CH3MgBr

Major gaseous pollutant of the thermal power station is – (1) H2S (2) NH3 (3) NO2 (4) SO2

Description : Major gaseous pollutant of the thermal power station is – (1) H2S (2) NH3 (3) NO2 (4) SO2

Last Answer : (4) SO2 Explanation: A flue-gas stack is a type of chimney, a vertical pipe, channel or similar structure through which combustion product gases called flue gases are exhausted to the outside air ... CO2) and water vapor as well as nitrogen and excess oxygen remaining from the intake combustion air.

Explain the following (a) The density of ice is less than that of liquid water? (b) The boiling point of water is less than that of H2S. (c) NaH has higher reducing character than H2O.

Description : Explain the following (a) The density of ice is less than that of liquid water? (b) The boiling point of water is less than that of H2S. (c) NaH has higher reducing character than H2O.

Last Answer : Ans-a) In structure of ice , Oxygen atom is tetrahedrally surrouneded by four hydrogen (with two hydrogen by hydrogen bond and with two hydrogen by covalent bond ) and have vacant spaces in ... Due to extensive hydrogen bonding in water c)NaH is ionic compound while water is a covalent compound

Which type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules

Description : Which type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules

Last Answer : Ans. (a) Dipole-Dipole interactions. (b)H-Bond. (c)Dispersion forces. (d)Dispersion forces. (e)Dispersion forces. (f)Induced dipole-dipole interactions.

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

Which of the following molecules has a permanent electric dipole moment? w) H2O x) Cl2 y) CH4 z) N2

Description : Which of the following molecules has a permanent electric dipole moment? w) H2O x) Cl2 y) CH4 z) N2

Last Answer : ANSWER: W -- H2O

The lunar soil consists primarily of: w) FeTiO2 x) A12O3 y) SiO2 z) H2O

Description : The lunar soil consists primarily of: w) FeTiO2 x) A12O3 y) SiO2 z) H2O

Last Answer : ANSWER: W -- FeTiO2

Which of these molecules is bound by ionic bonds? w) H2O x) CH4 y) NaCl z) C6H12O6

Description : Which of these molecules is bound by ionic bonds? w) H2O x) CH4 y) NaCl z) C6H12O6

Last Answer : ANSWER: Y -- NaCl

The complete combustion of one mole of hydrogen produces: w) 1/2 mole H2O x) 1/2 mole H2O + 1/2 mole O3 y) 1 mole water z) 1 mole hydroxide ions

Description : The complete combustion of one mole of hydrogen produces: w) 1/2 mole H2O x) 1/2 mole H2O + 1/2 mole O3 y) 1 mole water z) 1 mole hydroxide ions

Last Answer : ANSWER: Y -- 1 MOLE WATER

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Description : Which gas is released from paddy fields? a) CO2 b) H2S c) CH4 d) NH3

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Why does H2O have a boiling point higher than H2S?

Description : Why does H2O have a boiling point higher than H2S?

Last Answer : Water (H20) has hydrogen bonding and London forces. Hydrogen sulfide (H2S) has only London forces. The reason why water has hydrogen bonding and hydrogen sulfide does not is because the oxygen in ... .H2O is very strongly hydrogen bonded. These bonds require energy to break resulting in a higher

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Description : Why does H2O have a boiling point higher than H2S?

Last Answer : Water (H20) has hydrogen bonding and London forces. Hydrogen sulfide (H2S) has only London forces. The reason why water has hydrogen bonding and hydrogen sulfide does not is because the oxygen in ... .H2O is very strongly hydrogen bonded. These bonds require energy to break resulting in a higher

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Description : Which of the following is the strongest acid? (a) HI (b) H2O (c) CH4 (d) CH3OH

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Description : For the following compounds, which is the strongest base and which is strongest acid?

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Last Answer : ANSWER: Y -- IONIZATION OR DISSOCIATION 

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Last Answer : ANSWER: Z -- AN ALKANE

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Description : Which of the following nitrogen-containing compounds is most readily used by plants? w) nitrogen dioxide x) ammonia y) nitrous oxide z) nitrate

Last Answer : ANSWER: Z -- NITRATE

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Description : In which form is Silicon most frequently found in nature? w) The free element Silicon x) Silicon-Oxygen compounds y) Silicon-Carbon compounds z) Silicon-Metal compounds

Last Answer : ANSWER: X -- SILICON-OXYGEN COMPOUNDS

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Last Answer : ANSWER: X -- ALCOHOLS

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Description : Which of the following compounds is ONLY WEAKLY soluble in cold water? w) Silver Nitrate x) Sodium Carbonate y) Sodium Chloride z) Lead Chloride

Last Answer : ANSWER: Z -- LEAD CHLORIDE 

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Description : A family of organic compounds whose molecules will add water under an acid catalysis and change into alcohols are the: w) alkenes x) alkanes y) aromatic hydrocarbons z) cycloalkanes

Last Answer : ANSWER: W -- ALKENES

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Description : Which of the following compounds has the highest boiling point? w) CH4 x) CCL4 y) HI z) IF5

Last Answer : ANSWER: Z -- IF5

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Description : Members of which of the following classes of compounds generally produce acidic solutions when dissolved in water? w) metal oxides x) nonmetal oxides y) alcohols z) aldehydes

Last Answer : ANSWER: X -- NONMETAL OXIDES

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Description : Which of the following compounds contains both io and covalent bonds? w) Calcium Chloride x) Carbon Dioxide y) Calcium Fluoride z) Calcium Sulfate

Last Answer : ANSWER: Z -- CALCIUM SULFATE

What is the name given to the non-superimposable mirror image forms of chiral compounds? w) cis-trans x) enantiomers y) functional isomers z) diasteriomers

Description : What is the name given to the non-superimposable mirror image forms of chiral compounds? w) cis-trans x) enantiomers y) functional isomers z) diasteriomers

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Description : Which of the following compounds contains a double bond? w) butene x) acetylene y) butane z) propane

Last Answer : ANSWER: W -- BUTENE 

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Last Answer : ANSWER: X -- N2 (N = N)

Which of the following halogens does NOT replace the other halogens from their compounds? w) fluorine x) iodine y) bromine z) chlorine

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Last Answer : ANSWER: X -- IODINE

In which of the following compounds is the bonding most covalent? w) NaCl x) F2 y) MgS z) Fe3C

Description : In which of the following compounds is the bonding most covalent? w) NaCl x) F2 y) MgS z) Fe3C

Last Answer : ANSWER: X -- F2

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Description : Compounds of iodine are NOT used for which of the following? w) as a refrigerant x) in photographic film y) as an essential part of diet z) as an antiseptic

Last Answer : ANSWER: W -- AS A REFRIGERANT

For which of the following classes of salts are all of its compounds soluble in water? w) sulfates x) nitrates y) hydroxides z) chlorides

Description : For which of the following classes of salts are all of its compounds soluble in water? w) sulfates x) nitrates y) hydroxides z) chlorides

Last Answer : ANSWER: X -- NITRATES

Which of these substances exhibits the weakest intermolecular forces? (a) NH3 (b) H2O (c) He (d) HCI

Description : Which of these substances exhibits the weakest intermolecular forces? (a) NH3 (b) H2O (c) He (d) HCI

Last Answer : Ans:(c)