94420 + Interview Questions in Chemistry in Class 12 Page 570 InterviewSolution

28451.	The manufacture of fluorine is carried out by :
Answer» ELECTROLYSIS of aqueous HF heating ANHYDROUS `HF and MnO_(3)` electrolysis of anhydrous KF and `MnO_(2)` electrolysis of anhydrous `HF` mixed with `KHF_(2)` Answer :C

Discussion

28452.	The manganate and permanganate ions are_______________in shape.
Answer» SOLUTION :TETRAHEDRAL

Discussion

28453.	The maltose and glucose can be distinguished chemically by ………………….
Answer» MOLISCH's TEST Barfoed's test MILLION's test BIURET's test SOLUTION :Barfoed.s test

Discussion

28454.	The molecular formula of saturated fatty acid is
Answer» `C_nH_(2N)O_2` `C_nH_(2n-2)O_2` `C_nH_(2n+2)O_2` `C_nH_(2n+1)O_2` ANSWER :A

Discussion

28455.	The majority of noble gas compounds are those of xenon. Explain.
Answer» Solution :Except radon which is radioactive, Xe has the LOWEST ionization enthalpy among noble gases and HENCE can be easily oxidised by STRONG oxidising agents like `O_(2) and F_(2)`. That is why majority of noble GAS compounds are those of xenon.

Discussion

28456.	The molecular formula of oxygen at ordinary temperature is .......... And that of sulfur is ...........
Answer» SOLUTION :`O_2,S_8`

Discussion

28457.	The majority of amino acids found in proteins are
Answer» `ALPHA`-amino acids. `beta`-amino acids. `GAMMA-`amino acids. `DELTA`-amino acids. Answer :A

Discussion

28458.	The major use of chloroform today is in the production of the __________ refrigerant R-22.
Answer» ANSWER :FREON

Discussion

28459.	The molecular formula of phosphorus is:
Answer» `P_1` `P_4` `P_2` `P_5` ANSWER :B

Discussion

28460.	The major substitution product that is obtained by nitration of anisole is __________.
Answer» SOLUTION :4-nitroanisole

Discussion

28461.	The major sourceof CO pollution is
Answer» Industrialprocesscs VEHICULAR EXHAUST forestfires volcanic activity Answer :B

Discussion

28462.	The molecular formula of methyl isopropyl ether may be:
Answer» `C_4H_(10)O` `C_3H_8O` `C_4H_8O` `C_3H_(10)O` ANSWER :A

Discussion

28463.	The major role of fluorspar (CaF_(2)) which is added in small amount in the electrolytic reduction of Al_(2)O_(3) dissolved in fused cryolite is :
Answer» to act as catalyst to make fused MIXTURE conducting to lower the FUSION TEMPERTURE of melt to decrease the rate of oxidation of CARBON at the anode. Solution :Both are correct.

Discussion

28464.	The molecular formula of feldspar is
Answer» `K_(2)O.Al_(2)O_(3).6SiO_(2)` `K_(2)O.3Al_(2)O_(3).6SiO_(2)` `Na_(3)AlF_(6)` `CaSO_(4).2H_(2)O` ANSWER :A

Discussion

28465.	The major products of following reactions sequence are :
Answer» ANSWER :D

Discussion

28466.	the major product(s) obtained in the following reaction is/are
Answer» <BR> SOLUTION :`Br_(2)` ADDITION is anti-addition.

Discussion

28467.	The molecular formula of ether is:
Answer» `C_(n)H_(2N)O` `C_(n)H_(2n+1)O` `C_(n)H_(2n+2)O` `C_(n)H_(2n)OC_(n)H_(2n)` Solution :`C_(2)H_(6)OC_(2)H_(5)-=C_(4)H_(10)O=C_(n)H_(2n+2)O`

Discussion

28468.	The major product(s) obtained from the following reaction of 1 mole of hexadeuteriobenzene is//are
Answer» SOLUTION :

Discussion

28469.	The molecular formula of chloride of a metal M is MCl_3. The formula of its carbonate would be
Answer» `MCO_(3)` `M_(2)(CO_(3))_(3)` `M_(2)CO_(3)` `M(CO_(3))_(2)` Solution :As the MOLECULAR formula of CHLORIDE of a metal M is `MCl_(3)`, it is trivalentso formula of its carbonate will be `M_(2)(CO_(3))_(3)`.

Discussion

28470.	The major product (Y)in the following reaction sequency is : CH_(3) - overset( CH_(3))overset(\|)(C)H - CH= CH_(2) overset( Br_(2) //H_(2)O)(rarr) X overset("conc."H_(2)SO_(4)//Delta)(rarr)Y
Answer» `CH_(3) - overset(CH_(3))overset(\|)(C)H -CH= CH-Br` `CH_(3) - underset(H)underset(\|)overset(CH_(3))overset(\|)(C) -underset(Br) underset(\|)(C) = CH_(2)` `CH_(3) - overset(CH_(3))overset(\|)(C)=underset(Br)underset(\|)(C) - CH_(3)` `CH_(3) - overset(CH_(3))overset(\|)(C) = CH-CH_(2)- Br` SOLUTION :`CH_(3) -overset( CH_(3)) overset(\|)(C) H - CH= CH_(2) overset(Br_(2) //H_(2)O)(rarr) CH_(3) -overset(CH_(3))overset(\|)(C)H-CH-CH_(2)-Br overset(Conc. H_(2)SO_(4)//DELTA)(rarr) CH_(3)-overset(CH_(3))overset(\|)(C)=CH-CH_(2)-Br(Y)`

Discussion

28471.	The molecular formula of dithionic acid is _________.
Answer» `H_(2)S_(2)O_(4)` `H_(2)S_2O_(6)` `H_(2)S_(2)O_(5)` `H_(2)S_(2)O_(7)` Answer :B

Discussion

28472.	The major products A and B are :
Answer» SOLUTION :

Discussion

28473.	The molecular formula of ether is
Answer» `CH_3COCl` `CCl_3COCl_3` `CH_2ClCOOH` `CCl_3COCH_3` ANSWER :D

Discussion

28474.	Themolecular formula of the chlorinated acetone formedin the distillation of acetone with bleaching powder is:
Answer» `CH_3COCl` `CCl_3COCl_3` `CH_2ClCOOH` `CCl_3COCH_3` ANSWER :D

Discussion

28475.	The major product (Y) of the following reactionsis
Answer» ANSWER :A

Discussion

28476.	The molecular formula of benzonitrile is
Answer» `C_(6)H_(5)CN` `C_(6)H_(5)NC` `C_(6)H_(5)CNO` `C_(6)H_(5)NCO` Solution :The molecular FORMULA of benzoinitrile or phenytl CYANIDE is `C_(6)H_(5)CN`.

Discussion

28477.	The molecular formula of an organic compound is C_(3)H_(6)O_(2). This compound on boiling with aqueous acidic solution produces (A) and (B) copounds. (A) gives positive test with Fehling's solution as well as with Tollen's reagent. (B) on boiling with iodine andaqueous pottasium hydroxide produces potssium formate andcompound (C ). (C ) on heating with silver produces acetylene. Identify all compounds.
Answer» Solution :`underset((HCOOC_(2)H_(5)))(C_(3)H_(6)O_(2))OVERSET(H_(2)O)tounderset("It reduces Fehling's solution and Tollen's REAGENT")underset((HCOOH))((A))+underset((C_(2)H_(5)OH))((B))underset(KOH)overset(I_(2))tounderset((CHI_(3)))((C))overset(Ag)toHCequivCH`

Discussion

28478.	The major product (X) formed in the reaction sequence is:
Answer» `C_(6)H_(5)overset(O)overset(\|\|)C-CH_(3)` `C_(6)H_(5)-CO(CH_(3))_(2)` ANSWER :C

Discussion

28479.	The molecular formula of a saturated is C_(2)H_(4)Cl_(2). This formula permits the existence of two:
Answer» FUNCTIONAL ISOMERS position isomers OPTICAL isomers cis-trans isomers. ANSWER :B

Discussion

28480.	The major product X is
Answer» ANSWER :A

Discussion

28481.	The molecular formula of a non - stoichiometric tin oxide containing Sn (II) and Sn (IV) ions is Sn_(4.44) O_8. Therefore , the molar ratio of Sn (II) to Sn (IV) is approximately
Answer» `1:8` `1:6` `1:4` `1:1` ANSWER :C

Discussion

28482.	The major product U in the following reactons is overset(CH_(2)CH-CH_(3),H^(+))underset("high pressure, heat")rarr Toverset("radical initiator, O_(2))rarrU
Answer» ANSWER :B

Discussion

28483.	The molecular formula of a saturated compound is C_(2)H_(4)Br_(2). The formula permits the existence of two :
Answer» FUNCTIONAL ISOMERS position isomers OPTICAL isomers cis-trans isomers Answer :B

Discussion

28484.	The molecular formula of a saturated compound is C_2H_4Br_2. This formula permits the existence of:
Answer» FUNCTIONAL isomers Optical isomers Positional isomers Cis-trans isomers Answer :C

Discussion

28485.	The major product U in the following reaction is :
Answer» ANSWER :B

Discussion

28486.	The major product (s) obtained from the following reaction of 1 mol of hexadeuteriobenzene is /are-
Answer» SOLUTION :

Discussion

28487.	The major product P in the following reaction is CH_(3)-CH=CH_(2) underset("Peroxide")overset(HI)rarrP
Answer» `CH_(3)CH_(2)CH_(2)I` `underset("I")underset("\|")(CH_(3)-CH-CH_(3))` `underset("I")underset("\|")CH_(2)-CH=CH_(2)` `underset("I")underset("\|")CH_(2)-underset("I")underset("\|")CH_(2)` Solution :The PRODUCT formation will be accordingly to Markownikoff.s RULE, because peroxide effect is effective only in the case of HBr and not effective in case of HI.

Discussion

28488.	The molecular formula of a monobasic saturated fatty acid is:
Answer» `C_nH_(2N)O_2` `C_nH_(2n+1)O_2` `C_nH_(2n+2)O_2` `C_nH_(2n+1)O_3` ANSWER :A

Discussion

28489.	The major product (s) obtained in the following reaction is/are .
Answer» SOLUTION :both PRODUCTS are FORMED.

Discussion

28490.	The major product P of the following reaction is
Answer» ANSWER :D

Discussion

28491.	The molecular formula of a commercial resin used for exchanging ions in water softening is C_8H_7SO_3Na(Mol. Wt. 206). What would be the maximum uptake of Ca^(2+)ions by the resin when expressed in mole per gram resin ?
Answer» `1/103` `1/206` `2/309` `1/412` Solution :`Ca^(2+) + 2C_8H_7SO_3Na to Ca (C_8H_7SO_3)_2 + 2Na ` Molecular MASS of `C_8H_7SO_3Na` ` = 12 XX 8 + 1 xx 7 + 32 xx 1 + 16 xx 3 + 23 xx 1= 206` 2 moles of `C_8H_7SO_3Na` require 1 mol of `Ca^(2+)` ` 2 xx 206 g ` of `C_8H_7SO_3 Na + 1 ` mol of `Ca^(2+)` 1g of `C_8H_7SO_3Na = 1/412 ` mol ` therefore ` maximum uptake ` = 1/412 ` mol/g

Discussion

28492.	The major product of this reaction is
Answer» ANSWER :A

Discussion

28493.	The molecular formula of a commercial resin used for exchanging ions in water softening is C_(8)H_(7)SO_(3)Na (mol. Wt. 206). What would be the maximum uptake of Ca^(2+) ions by the resin when expressed in mole per gram resin?
Answer» `(1)/(103)` `(1)/(206)` `(2)/(309)` `(1)/(412)` Solution :`{:(underset("2 moles")(2C_(8)H_(7)SO_(3)^(-)Na^(+))+underset(" 1 mole")(Ca^(2+))rarr(C_(8)H_(7)SO_(3)^(-))Ca^(2+)),(=2xx206=412g""+2Na^(+)):}` Thus, 412 G of resin take up `Ca^(2+)` ions = 1mole `therefore" 1 g of resin will take up "Ca^(2+) " ions"=(1)/(412)"mole"` i.e, UPTAKE of `Ca^(2+)` ions in mole per gram resin `=(1)/(412)`

Discussion

28494.	The major product of the reaction of alcohols with carboxylic acid in presence of acid catalyst is ….
Answer» ESTER Ether Anhydride Aldehyde Solution :Ester

Discussion

28495.	The major product of the reaction is
Answer» NONE of these Answer :C

Discussion

28496.	The molecular formula of a commercial resin used for exchanging ions in water softeningis C_(8) H_(7) SO_(3) (mol . wt. = 206) . Whatwouldbe the maximumuptake of Ca^(2+) ionsby the resin whenexpressed in mole per gram resin ?
Answer» `(1)/(103)` `(1)/(206)` `(1)/(309)` `(1)/(412` Solution :`2 C_(8) H_(7) SO_(2)Na + Ca^(2+) to (C_(8) H_(7) SO_(3))_(2) Ca + 2Na`

Discussion

28497.	The major product of the reaction overset(NaNO_(2)//H_(2)SO_(4))to is
Answer» SOLUTION :

Discussion

28498.	The molecular formula H_(2)S_(2)O_(2) represents which oxoacid among the following?
Answer» Hydrosulphurous ACID Thiosulphuric acid SULPHURIC acid Pyrosulphurous acid ANSWER :B

Discussion

28499.	The molecular formula Co(NH_(3))_(5)BrSo_(4) have two isomeric form X and Y which differ in :
Answer» HYBRIDISATION MAGNETIC moment Geometry Electrical CONDUCTIVITY Solution :`[Co(NH_(3))_(5)Br]SO_(4),[Co(NH_(3))_(5)SO_(4)]Br,`{Electrical conductivity}

Discussion

28500.	The major product of the reaction is:
Answer» ANSWER :C

Discussion

Explore topic-wise InterviewSolutions in .

The manufacture of fluorine is carried out by :

The manganate and permanganate ions are_______________in shape.

The maltose and glucose can be distinguished chemically by ………………….

The molecular formula of saturated fatty acid is

The majority of noble gas compounds are those of xenon. Explain.

The molecular formula of oxygen at ordinary temperature is .......... And that of sulfur is ...........

The majority of amino acids found in proteins are

The major use of chloroform today is in the production of the __________ refrigerant R-22.

The molecular formula of phosphorus is:

The major substitution product that is obtained by nitration of anisole is __________.

The major sourceof CO pollution is

The molecular formula of methyl isopropyl ether may be:

The major role of fluorspar (CaF_(2)) which is added in small amount in the electrolytic reduction of Al_(2)O_(3) dissolved in fused cryolite is :

The molecular formula of feldspar is

The major products of following reactions sequence are :

the major product(s) obtained in the following reaction is/are

The molecular formula of ether is:

The major product(s) obtained from the following reaction of 1 mole of hexadeuteriobenzene is//are

The molecular formula of chloride of a metal M is MCl_3. The formula of its carbonate would be

The major product (Y)in the following reaction sequency is : CH_(3) - overset( CH_(3))overset(|)(C)H - CH= CH_(2) overset( Br_(2) //H_(2)O)(rarr) X overset("conc."H_(2)SO_(4)//Delta)(rarr)Y

The molecular formula of dithionic acid is _________.

The major products A and B are :

The molecular formula of ether is

Themolecular formula of the chlorinated acetone formedin the distillation of acetone with bleaching powder is:

The major product (Y) of the following reactionsis

The molecular formula of benzonitrile is

The major product (X) formed in the reaction sequence is:

The molecular formula of a saturated is C_(2)H_(4)Cl_(2). This formula permits the existence of two:

The major product X is

The molecular formula of a non - stoichiometric tin oxide containing Sn (II) and Sn (IV) ions is Sn_(4.44) O_8. Therefore , the molar ratio of Sn (II) to Sn (IV) is approximately

The major product U in the following reactons is overset(CH_(2)CH-CH_(3),H^(+))underset("high pressure, heat")rarr Toverset("radical initiator, O_(2))rarrU

The molecular formula of a saturated compound is C_(2)H_(4)Br_(2). The formula permits the existence of two :

The molecular formula of a saturated compound is C_2H_4Br_2. This formula permits the existence of:

The major product U in the following reaction is :

The major product (s) obtained from the following reaction of 1 mol of hexadeuteriobenzene is /are-

The major product P in the following reaction is CH_(3)-CH=CH_(2) underset("Peroxide")overset(HI)rarrP

The molecular formula of a monobasic saturated fatty acid is:

The major product (s) obtained in the following reaction is/are .

The major product P of the following reaction is

The molecular formula of a commercial resin used for exchanging ions in water softening is C_8H_7SO_3Na(Mol. Wt. 206). What would be the maximum uptake of Ca^(2+)ions by the resin when expressed in mole per gram resin ?

The major product of this reaction is

The molecular formula of a commercial resin used for exchanging ions in water softening is C_(8)H_(7)SO_(3)Na (mol. Wt. 206). What would be the maximum uptake of Ca^(2+) ions by the resin when expressed in mole per gram resin?

The major product of the reaction of alcohols with carboxylic acid in presence of acid catalyst is ….

The major product of the reaction is

The molecular formula of a commercial resin used for exchanging ions in water softeningis C_(8) H_(7) SO_(3) (mol . wt. = 206) . Whatwouldbe the maximumuptake of Ca^(2+) ionsby the resin whenexpressed in mole per gram resin ?

The major product of the reaction overset(NaNO_(2)//H_(2)SO_(4))to is

The molecular formula H_(2)S_(2)O_(2) represents which oxoacid among the following?

The molecular formula Co(NH_(3))_(5)BrSo_(4) have two isomeric form X and Y which differ in :

The major product of the reaction is: