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85351.

"AgNO"_(3) does not give precipitate with chloroform because:

Answer»

`CHCl_(3)` is inosluble in WATER
`CHCl_(3)` does not ionise in water
`CHCl_(3)` is an ORGANIC compound
`"AgNO"_(3)` is INSOLUBLE in `"CHCl"_(3)`

ANSWER :B
Discussion
85352.

Acidic strength of marked hydrogen of following compound in decreasing order is

Answer»

IgtIIgtIIIgtIV
IIgtIgtIIIgtIV
IIIgtIIgtIgtIV
IIgtIIIgtIVgtI

Solution :Acidic STRENGTH `PROP` STABILITY of CONJUGATE base.
Discussion
85353.

AgNO_(3) does not decompose where :

Answer»

U.V. radiation
Skin (human)
Water `25^(@)C`
Glucose

Solution :`AgNO_(3)to Ag` not decompose by `H_(2)O` at ROOM temp. but reduce to silver inpresence of light andreducing agent like glucose
Discussion
85354.

AgNO_(3) (aq) was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot of conductance (^^) versus the value of AgNO_(3) is

Answer»

P
Q
R
S

Answer :D
Discussion
85355.

AgNO_(2)(aq) was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot conductivity of the solution was measured. The plot of conductance (wedge) versus the volume of AgNO_(3) is

Answer»

`P`
`Q`
`R`
`S`

Solution :`AgNO_(3)(aq)+KCl(aq) rarr AgCldarr+KNO_(3)(aq)`
In this reaction, `Cl^(c-)` ions are relaced by `NO_(3)^(c-)` ions.
`i.` Till all `KCl(Cl^(c-)` ions `)` gets CONSUMED by `NO_(3)^(c-)` ions, `Cl^(c-)` will get REPLACED by `NO_(3)^(c-)` ion.
`K^(o+)Cl^(c-) overset(AgNO_(3))rarrK^(o+)NO_(3)^(c-)`.
Conductance is constant since the conductance `(wedge)` of `Cl^(c-)~~` conductance of `NO_(3)^(c-)`.
Initially, conductance do not fall of to a large extent. Even the fall `//` rise will be linear `(` either DECREASING or increasing `)`.
`ii.` When all `Cl^(c-)` ions are reacted and no reaction occurs, there are `AG^(o+), NO_(3)^(c-)`, and `K^(o+)` ions are left in the solution which increases the conductance of solution sharply.
`K^(o+)Cl^(c-) overset(AgNO_(3))rarr Ag^(o+)+K^(o+)+NO_(3)^(c-)`
Hence, graph`(s)` is the most appropriate answer.
Discussion
85356.

[Ag(NH_(3))_(2)OH] liberates silver when it reacts with

Answer»

HCOOH
`CH_(3)COOH`
`CH_(3)COCH_(3)`
`CH_(3)OH`

SOLUTION :HCOOH REDUCES TOLLENS. REAGENT to Ag mirror.
`HCOOH+underset("Tollens. reagent")(2[Ag(NH_(3))_(2)]^(+))+2OH^(-) to underset("Silver mirror")(2AG darr) +CO_(2) uarr+4NH_(3)+2H_(2)O`
Discussion
85357.

(a)Give the decreasing order of reactivites of the following monmers towards catitopm addition polymerisation. (I)MeCH=CH_(2) (II)PhCH=CH_(2) (III)CH_(2)=CH-COOMe (IV)CH_(2)=CH=Cl (b)Give the decreasing order of reactivities of the following monomers towards anionic addition polymerisation. (I)Me=CH=CH_(2) (II)PhCH=CH_(2) (III)CH_(2)=CH=CN (IV)H_(2)C=CCl_(2) (v)H_(2)C=CF_(2) (VI)F_(2)C=CF_(2)

Answer»

SOLUTION :(a)Cationic polymerisation is favoured by the peresence of`EDG(e.g.,Megroup`.The more the`EDG`,the more stable is the intermediate carbocation,and as a RESULT more favoured is the cationic polymerisation.
stability ofis
(II)
(I)
The decreasing reactivity order towards cation polymerisation is(II)gt(I)gt(IV)gt(III).
(b) Anion polymetic is favouable by the presence of `EWG(e.g.,rarr-X,-COOR,-CN,ETC)`The more the`EWG,the more stable is the intermediate carbonion and consequently more favoured is the anionic POLYMERSATION.
Stability of
The decreasing reactivity order towards anion polymersation is(VI)gt(III)gt(V)gt(IV)gt(II)gt(I).
Discussion
85358.

Acidic solution of a salt producing deep blue colour with starch and KI .The salt is:

Answer»

Chlbride
Nitrite
Acetate
Bromide

Answer :B
Discussion
85359.

(A)gives brick red colour in flame and decolourises MnO_(4)^(Theta)//H^(o+), Gas (C )burns with blue flame .identify (A),(B), (C ) and (D),

Answer»

Solution :(A) `CaC_(2)O_(4)` (B)`CAO`
(C ) `CO` (D) `CO_(2)`
Discussion
85360.

Acidic solution of a saltproduced deep blue colour with starch and potassium iodide is :

Answer»

ACETATE
NITRITE
chloride
bromide .

Solution :`NO_2^(-)` LIBERATES `I_2` from KI which GIVES blue COLOUR withstarch solution.
Discussion
85361.

(a)Give any two reasons for anomalous behaviour of Fluorine.(b) Write the structure of perchloric acid

Answer»

Solution :(a) (i) SMALLER SIZE
(ii) Highest electronegativity
(B) Perchloric acid, `HClO_(4)`
Discussion
85362.

Acidic order of following compounds is : (I) H_(2)O_(2),"(II)" H_(2)O, (III) H_(2),"(IV)"D_(2)O

Answer»

I GT II gt III gt IV
II gt I gt IV gt III
IV gt I gt II gt III
I gt II gt IV gt III

Solution :`H_(2)O_(2)gtH_(2)OgtD_(2)OgtH_(2)`
Discussion
85363.

AgF, AgCl, NaCl, NaBr, Nal are colourless but AgBr and AgI are coloured because

Answer»

`Ag^(+)`polarizes Br- and `I^-` and not able to polirize `Cl^-` and P-
AgBr has unpaired electron
AgBr has defects
All of these

Solution :AgBr,Agl COLOURED DUE to polarization
Discussion
85364.

Ageous solution of a sqalt (Y) is alkline tolitmas On strong heating it swells-up to give a glassy material .Whencone H_(2)SO_(4) in added to a hotconcentrated solution of (Y) whitecrystalsof a weak acid sepurate out .Hence , the compound (Y) is

Answer»

`Na_(2)SO_(4).10H_(2)O`
`Ca_(2)P_(4)O_(11).10H_(2)O`
`Na_(2)B_(6)O_(11)`
`Na_(2)B_(4)O_(7).10H_(2)O`

Solution :`Na_(2)B_(4)O_(7)+7H_(2)Orarr ubrace(underset("Stronge base")(2NaOH)+underset("Weak acid")(4H_(3)BO_(3)))_("Alkaline")`
`Na_(2)B_(4)O_(7)+7H_(2)O overset(Delta)rarrubrace(2NaBO_(2)+B_(2)O_(3))_("Glassy-bead")`
`underset(("WHITE crystals"))(Na_(2)B_(4)O_(7))+H_(2)SO_(4)+5H_(2)O RARR Na_(2) SO_(4) +4H_(3)BO_(3)`
Discussion
85365.

[Ag(CN)_(2)]^(-) rarr 2Ag^(+) + 2CN^(-) , the K_(c ) for the reaction at 25^(@)C is 4 xx 10^(-19) . Calculate [Ag^(+)] in solution which was originally 0.1 M in KCl and 0.003 in NO_(3).

Answer»


ANSWER :`ALPHA = 7.5 XX 10^(-18)`
Discussion
85366.

AgCl with NH_(3) forms

Answer»

`[Ag(NH_(3))_(2)]Cl`
`AgNO_(3)`
`AgNH_(2)CI`
Ag MIRROR

Answer :A
Discussion
85367.

AgCl on fusion with Na_2CO_3 gives:

Answer»

AG
`AgCO_3`
`Ag_2O`
Ag carbide

Answer :A
Discussion
85368.

AgCl precipitate dissolves in ammonium hydroxide due to the formation of ……………

Answer»

`[Ag(NH_(4))_(2)]OH`
`[Ag(NH_(4))_(2)]Cl`
`[Ag(NH_(3))_(2)]Cl`
`[Ag(NH_(3))_(2)]^(+1)`

Answer :A::B::C
Discussion
85369.

Acidic nature of Zn(OH)_2 is shown from the formation of the following compound with the formula:

Answer»

`Na_2ZnO_2`
`Na_2CO_3`
`NaZnO_2`
None

Answer :A
Discussion
85370.

AgCl on fusion with Na_2CO_3 the gas evolved is

Answer»

`O_2`
`CO_2`
`O_2 + CO_2`
none

Answer :A
Discussion
85371.

Acidic nature of Zn(OH_2) is shown during its reaction with:

Answer»

NAOH
HCl
H2SO4
None

Answer :A
Discussion
85372.

Acidic nature of phenol is due to

Answer»

PHENOLIC group
benzene group
hydrogen bonding
resonance STABILISATION of PHENOXIDE ion

Answer :D
Discussion
85373.

AgCl on fusion with Na_(2)CO_(3) gives

Answer»

`Ag_(2)CO_(3)`
AG
`Ag_(2)O`
Ag carbide

Answer :B
Discussion
85374.

Acidic nature of pentoxide in group 15 ____down the group.

Answer»

Increases
Decreases
Remains same
None

Answer :B
Discussion
85375.

AgCl on fusion with Na_(2)CO_(3) forms:

Answer»

`Ag_(2)CO_(3)`
`Ag_(2)O`
`Ag`
`Ag_(2)C_(2)`

Answer :C
Discussion
85376.

AgCl is soluble in NHpH solution. The solubility is due to the formation of

Answer»

`AGOH`
`Ag_(2)O`
`[Ag(NH_(3))_(2)]^(+)`
`NH_(4)Cl`

Solution :`AgCl(s)+2NH_(4)OH(aq)to [Ag(NH_(3))_(2)]Cl(aq)+2H_(2)O(L)`
Discussion
85377.

Acidic medium?

Answer»

SOLUTION :In acidic medium : In this, the oxidation state of MN changes from +7 to +2. `THEREFORE E_(KMnO_(4))=(158)/(7-2)=31.6`
Discussion
85378.

AgCl is soluble in (a)____ and Ag^(o+) is present in (b)_____.

Answer»


Answer :a.`Aq,NH_(3)` b. Cationic complex `[AG(NH_(3))_(2) ^(THETA)]`
Discussion
85379.

Acidic hydrolysis of ether gives

Answer»

TWO MOLE of aldehyde
One mole of alcohol
One mole of aldehyde
Two mole of alcohol

Answer :D
Discussion
85380.

AgCl is soluble in :

Answer»

AQUA REGIA
`H_2SO_4`
`NH_4OH` is the presence of `NH_4Cl`
`HCL`.

ANSWER :C
Discussion
85381.

Acidic hydrolysis of 2-methylbenzamide followed by heating with alkaline potassium permanganate and acidic work up produces

Answer»

BENZOIC acid
Glutaric acid
Oxalic acid
Phthalic acid

Answer :D
Discussion
85382.

AgCl is not soluble in

Answer»

`Na_(2)S_(2)O_(3)`
`KCN`
`NH_(3)`
`H_(2)O`

Solution :`AgCl` is not SOLUBLE in `H_(2)O` because lattice energy is more than hydration energy.
(a) `AgCl+2Na_(2)S_(2)O_(3)rarrNa_(2)underset("soluble")([Ag(S_(2)O_(3))_(2)])+NaCl,`
(b) `AgCl+2KCNrarrunderset("soluble")(K[Ag(CN)_(2)])+KCl`
(c) `AgCl+2NH_(3)rarr underset("soluble")([Ag(NH_(3))_(2)]^(+)Cl^(-),` (a), (b), (c) are not correct. (d) is correct ANSWER.
Discussion
85383.

Acidic hydrogen is present in :

Answer»

ethyne
ethene
benzene
ethane

Answer :A
Discussion
85384.

Acidic hydrogen is present in

Answer»

ETHYNE
BENZENE
ETHENE
ETHANE

ANSWER :A
Discussion
85385.

AgCl dissolves in NH_(4)OH due to the formation of :

Answer»

`[AG(NH_4)_2]Cl`
`[Ag(NH_4)_3]Cl`
`[Ag(NH_3)_2] Cl`
`[Ag(NH_3)_2OH]`

ANSWER :C
Discussion
85386.

Acidic dehydration of the following alcohols is in the order :

Answer»

`(I)lt(II)lt(III)lt(IV)`
`(I)gt(II)gt(III)gt(IV)`
`(III)lt(II)lt(I)lt(IV)`
`(II)lt(III)lt(IV)lt(I).`

Solution :DEHYDRATION of alcohols to conjugation. GREATER is the SCOPE of conjugation, more is the ease of dehydration.
The scope of conjugation is least in (II) followed by (II) and then (I). The scope of conjugation is maximum in (IV) i.e., it will be maximum dehydrated therefore, (c) is the correct sequence.
Discussion
85387.

Acidic fluxes are

Answer»

`SiO_(2)`
BORAX
`Fe_(2)O_(3)`
`CaCO_(3)`

Answer :A::B
Discussion
85388.

Acidic character of carboxylic acid ………. with anmolecular mass

Answer»

SOMETIME INCREASES some TIME decreases
decreases
increases
none of the above

ANSWER :B
Discussion
85389.

AgCl dissolves in NH_3 solution, due to the formation

Answer»

AgOH
AG
`Ag_(2)O`
`[Ag(NH_(3))_(2)]^(+)Cl^(-)`

ANSWER :D
Discussion
85390.

AgCl dissolves in ammonia solution giving

Answer»

`AG^(+), NH_(4)^(+) and Cl^(-)`
`Ag(NH_(3))^(+) and Cl^(-)`
`Ag_(2)(NH_(3))^(+) and Cl^(-)`
`Ag(NH_(3))_(2)^(+) and Cl^(-)`

SOLUTION :`AgCl+2NH_(3) to underset("complex")([Ag(NH_(3))_(2)]Cl)""[Ag(NH_(3))_(2)]^(+)+Cl^(-)`
Discussion
85391.

Acidic character of alcohols depends up on

Answer»

NUMBER of alkyl GROUPS
POLARITY of -OH groups
TYPES of alkyl groups
all of these

Answer :D
Discussion
85392.

T/FAcidic character of alcohols follows the order , 3^@ > 2^@ > 1^@.

Answer»


ANSWER :T
Discussion
85393.

AgCl dissolved in ammonia solution giving

Answer»

`AG^+,NH_4^+` and CI
`Ag(NH_3)^+` and `CI^-`
`Ag_2(NH_3)_2^+` and CI
`Ag(NH_3)_2^+ `and`CI^-`

ANSWER :D
Discussion
85394.

Acidic strength of primary (1^@), secondary (2^@) and tertiary (3^@) alcohols follow the sequence:

Answer»


ANSWER :T
Discussion
85395.

AgBr(s)+2S_(2)O_(3)^(2-)(aq)hAq Ag(S_(2)O_(3))_(2)^(3-)(aq)+Br^(-)(aq) Given K_(sp)(AgBr)=5xx10^(-13), K_(f)Ag(S_(2)O_(3))_(2)^(3-)=5xx10^(13) What is the molar solubillity of AgBr in 0.1 M Na_(2)S_(2)O_(3)?

Answer»

0.5 M
0.25 M
0.045 M
None of these

Answer :C
Discussion
85396.

Acidic character increases from HF to HI. State whether the above statement is True or false and give reason for your answer.

Answer»


Solution :(i) The given statement is true.
(ii) The relative ACIDIC strength of HF, HCl, HBr and HI depends UPON their bond dissociation enthalpies.
(iii) Since, the bond dissociation enthalpy of H-X bond from H-F to H-I as the size of atom increases from F to I.
Therefore, the acidic strength increases in the opposite ORDER as :
H - F `lt` H - Cl `lt` H - Br `lt` H - I
Discussion
85397.

AgBr used in photography, is removed with the help of ……… called ………. And forms ………..

Answer»

`Na_(2)S_(2)O_(3)," hypo "Na_(3)[AG(S_(2)O_(3))_(2)]`
Hydroquinone, `Ag, AgNO_(3)`
`Na_(2),SO_(4)," hypo "Na_(3)[Ag(S_(2)O_(3))_(2)]`
`Na_(2)S_(2)O_(3)," sodium THIOSULPHATE, "Na_(3)[Ag(S_(2)O_(3))_(2)]`

SOLUTION :(ad)(a) and (d) are CORRECT.
Sodium thiosulphate is used which is called hypo and FORMS soluble complex `Na_(3)[Ag(S_(2)O_(3))_(2)]`
(b) and (c) are ruled out.
Discussion
85398.

Acidic hydride of nitrogen is

Answer»

`NH_3`
`N_2H_4`
`N_2H_2`
`N_3H`

ANSWER :D
Discussion
85399.

AgBr dissolves in the excess of KCN and Na_2S_2O_3 solutions due to the formation of complex ions. The ions are respectively

Answer»

`[AG(CN)_2]^+ and [Ag(S_2O_3)_2]^(3)`
`[Ag(CN)_2]^(-) and [Ag(S_2O_3)_2]^(3-)`
`[Ag(CN)_4]^(3-) and [Ag_2(S_2O_3)_2]^(2-)`
`[Ag(CN)_3]^(2-) and [ Ag(S_2O_3)]^(-)`

Answer :B
Discussion
85400.

Acidic and basic nature of organic compound depends upon-Inductive effect. Acidic strength of organic acid increase with increase in electron withdrawing group or - group and decrease with increase in electron releasing group or + group. Basic strength of organic compound having just opposite relationship with inductive effect, i.e. basic strength prop+1 effectWhich one of the following phenols will show highest acidity?

Answer»




ANSWER :C
Discussion