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26801.

The order of coagulating power of PO_(4)^(3-), SO_(4)^(2-) and Cl^(-) in the coagulating of a given positive sol is

Answer»

`PO_(4)^(3-)gtSO_(4)^(2-)gtCl^(-)`
`SO_(4)^(2-)gtCl^(-)gtPO_(4)^(3-)`
`Cl^(-)gtPO_(4)^(3-)gtSO_(4)^(2-)`
`Cl^(-)gtSO_(4)^(2-)gtPO_(4)^(3-)`

ANSWER :A
Discussion
26802.

The number of neutrons accompanying the formation of ""_(54)""^(139)Xe and ""_(38)""^(94)Sr from th absorption of slow neutron by ""_(92)""^(235)U, followed by nuclear fission is

Answer»

0
2
1
3

Answer :D
Discussion
26803.

The number of neutrons accompanying the formation of ._(54)^(139)Xe and ._(38)^(94)Sr from the absorption of a slow neutron by ._(92)^(235)U, followed by nuclear fission is,

Answer»

0
2
1
3

Solution :The guiding RULE is
The mass number and atomic NUMBERS do not change in a nuclear reaction.
The GIVEN nuclear fission reaction is
`._(92)^(235)U + ._(0)^(1)n rarr ._(54)^(139)Xw + ._(38)^(94)Sr + 3_(0)^(1) n`
Discussion
26804.

The order of bond length from the following structure .

Answer»

IIIgtI=VgtIVgtII
IVgtIIgtI=VgtIII
IIIgtIVgtI=VgtII
IgtIIgtIIIgtIVgtV

Answer :A
Discussion
26805.

The number of nearest neighbours of each sphere in hexagonal closed packing pattern in its own layer will be

Answer»

4
`6`
`12`
`8`

Answer :B
Discussion
26806.

The order of Cl - O bond energy in ClO^(-), ClO_(2)^(-), ClO_(3)^(-), CIO_(4)^(-) is

Answer»

`CLO^(-)gtClO_(2)^(-)gtClO_(3)^(-)gtClO_(4)^(-)`
`ClO_(4)^(-)gtClO_(3)^(-)gtClO_(2)^(-)gtClO^(-)`
`ClO_(4)^(-)gtClO_(2)^(-)gtClO_(3)^(-)gtClO^(-)`
`ClO_(3)^(-)gtClO^(-)gtClO_(2)^(-)gtClO_(4)^(-)`

Answer :B
Discussion
26807.

The orderof boilingpoint in isomersamine is

Answer»

`1^(0) GT 2^(0) gt 3^(0)`
`1^(0) LT 2^(0) gt 3^(0)`
`1^(0) lt 2^(0) lt 3^(0)`
`1^(0) gt 2^(0) 3^(0)`

Solution :Higherboilingpoint forlongerchainof alkylgroup
Discussion
26808.

The number of nearest neighbours with which a given sphere is in contact is called______

Answer»

SOLUTION :Co-ordination NUMBER
Discussion
26809.

The order of basic strength of alkaline earth metal hydroxide is

Answer»

`Be(OH)_2gt MG(OH)_2gt CA(OH)_2gt Ba(OH)_2`
`Be(OH)_2 gt Mg(OH)_2 Ca(OH)_2 gt Ba(OH)_2`
`Ba(OH)_2 gt Ca(OH_2 gt Mg(OH)_2 gt Ba(OH)_2`
`Ba(OH)_2 gt Ca(OH)_2gt Be(OH)_2 gt Mg(OH)_2`

Answer :C
Discussion
26810.

The number of nearest neighbours of each atom in cubic close packing (ccp) and body-centred cubic arrangement (bcc) is respectively

Answer»

12, 12
12, 8
8, 6
8, 8

Answer :B
Discussion
26811.

The correct order for boiling point of isomeric alkyl amines is

Answer»

`1^@ gt2^@ GT 3^@`
`2^@ gt 3^@ gt 1^@`
`3^@ gt2^@ gt 1^@`
`1^@ gt 3^@ gt 2^@`

Answer :A
Discussion
26812.

The number of natural polymers among the following is___________.

Answer»


ANSWER :C
Discussion
26813.

The number of naturally occurring p-block elements that are diamagnetic is

Answer»

18
6
5
7

Solution :The group 18 elements have COMPLETELY FILLED subshells.So they are diamagnetic .They are He,Ne,AR,Kr and XE.
Discussion
26814.

The order of basic strength for methyl substituted amines in equeous solution is

Answer»

`N(CH_3)_3 gt N(CH_3)_(2)H gt N(CH_3)H_2 gt NH_3`
`N(CH_3)H_2 gt N(CH_3)_(2)H gt N(CH_3)_(3) gt NH_3`
`NH_3 gt N(CH_3)H_2 gt N(CH_3)_(2)H . N(CH_3)_(3)`
`N(CH_3)_(2)H gt N(CH_3)H_2 gt N(CH_3)_(3) gt NH_3`

ANSWER :D
Discussion
26815.

The order of basic nature of hydride compound of Group-15 is..........

Answer»

`NH_(3) LT PH_(3) lt AsH_(3) lt BiH_(3) lt Sb,H_(3)`
`BiH_(3) lt SbH_(3) lt AsH_(3) lt PH_(3) lt NH_(3)`
`NH_(3) gt PH_(3) gt BiH_(3) gt AsH_(3) gt SbH_(3)`
`NH_(3) gt PH_(3) gt AsH_(3) gt SbH_(3) gt BiH_(3)`

Answer :B::D
Discussion
26816.

The order of basic strength for methyl substituted amines in aqueous solution is ………………

Answer»

`N(CH_(3))_(3)GTN(CH_(3))_(2)HgtN(CH_(3))H_(2)gtNH_(3)`
`N(CH(_3))H_(2)gtN(CH_(3))_(2)HgtN(CH_(3))_(3)gtNH_(3)`
`NH_(3)gtN(CH_(3))H_(2)gtN(CH_(3))_(2)HgtN(CH_(3))_(3)`
`N(CH_(3))_(2)HgtN(CH_(3))H_(2)gtN(CH_(3))_(3)gtNH_(3)`

ANSWER :D
Discussion
26817.

The number of nearest neighbours and that of next nearest neighbours of an atom of a metal with face-centred cubic crystal structure, respectively, are-

Answer»

6, 8
8, 12
12, 6
8, 6

Answer :C
Discussion
26818.

The order of basic strength among the following amines in benzene solution is

Answer»

`CH_3CH_2gt(CH_3)_3Ngt(CH_3)_2NH`
`(CH_3)_2NHgt(CH_3NH_2gt(CH_3)_3N`
`NH_3NH_2gt(CH_3)_2NHgt(CH_3)_3N`
`(CH_3)_3NgtCH_3NH_2gt(CH_3)_2NH`

SOLUTION :`UNDERSET(5.4xx10^-4)(CH_3)_2NHgtunderset(4.5xx10^-4)(CH_3NH_2)gtunderset(0.6xx10^-4)((CH_3)_3N`
Discussion
26819.

The number of Na^+ ions which surrounds each Cl^- ion in the NaCI crystal lattice is:

Answer»

4
6
12
8

Answer :B
Discussion
26820.

The order of appearance of the following with rising temperature during the refining of crude oil is

Answer»

KEROSENE OIL, GASOLINE, DIESEL
Diesel, gasoline, kerosene oil
Gasoline, diesel, kerosene oil
Gasoline, kerosene oil, diesel

Answer :D
Discussion
26821.

The number of monosubstituted derivatives of pyridine is

Answer»

2
3
4
5

Answer :B
Discussion
26822.

The orderof appearance of thefollowingwithincreaseingtemperaturesuringrefining ofcrudeoilis :

Answer»

KEROSENE, GASOLINE , diesel
diesel, gasoline , kerosne
gasoline , kerosene,diesel
gaoline , DIESL, kerosene

ANSWER :C
Discussion
26823.

The number of moles of thiosulphate (S_(2)O_(3)^(2-) ) that will required to react completely with one mole I2 in alkaline medium (where it gets oxidised to SO_(4)^(2-) ) is :

Answer»

`1//4`
4
8
`1//8`

ANSWER :A
Discussion
26824.

Theorderofappearanceof thefollowing withrisingtemperature during the refiningofcrudeoil is :

Answer»

KEROSENE oilgasolinediesel
dieselgasolinekerosene OIL
gasolinediesel, keroseneoil
gasolinekeroseneoildiesel

ANSWER :D
Discussion
26825.

The number of primary amines possible for C_(4)H_(9)N (exclude stereoisomers)

Answer»


SOLUTION :
Discussion
26826.

Which of the following esters undergo alkaline hydrolysis at a fastest rate

Answer»

`RCOX gt RCONH_2 gt RCOOCOR gt RCOOR`
`RCOX gt RCOOCOR gt RCOOR gt RCONH_2`
`RCOOR gt RCONH_2 gt RCOX gt RCOOCOR`
`RCOOCOR gt RCOOR gt RCOX gt RCONH_2`

Answer :B
Discussion
26827.

The number of monodentate ligands which are directly bonded to the metal ion is known as:

Answer»

oxidationstate
COORDINATION SPHERE
coordination NUMBER
valency.

Answer :C
Discussion
26828.

The order of activity of the various O- and P-director is

Answer»

`-O^(-)gt-Ohgt-OCOCH_(3)gt-COCH_(3)`
`-Ohgt-O^(-)gt-OCOCH_(3)gt-COCH_(3)`
`-Ohgt-O^(-)gt-COCH_(3)gt-OCOCH_(3)`
`-O^(-)gt-COCH_(3)gt-OCOCH_(3)gt-OH`

SOLUTION :
Discussion
26829.

The number of monochloro derivatives of isohexane is

Answer»

3
4
5
6

Solution :Isohexane forms FIVE monochloro derivates SINCE it has five TYPES of H-atoms as SHOWN in below :
Discussion
26830.

The order ofactivity of the various o- and p-director is

Answer»

`-O^(-) GT -OH gt -OCOCH_(3) gt -COCH_(3)
`-OH gt -O^(-) gt -OCOCH_(3) gt -COCH_(3)
`-OH gt -O^(-) gt -COCH_(3) gt -OCOCH_(3)
`-O^(-) gt -COCH_(3) gt -OCOCH_(3) gt -OH`

ANSWER :A
Discussion
26831.

The number of monobromo derivatives of neopentane is :

Answer»

Five
Four
One
More than five

Answer :C
Discussion
26832.

The order of acidic strength for the following compounds is :-

Answer»

`igtiigtiii`
`iigtiiigti`
`igtiiigtii`
`iiigtigtii`

ANSWER :A
Discussion
26833.

The number of moles of proton which can be easily given by 1-butyne (1 mole) is

Answer»

1
2
3
6

Answer :A
Discussion
26834.

The order of acidic character of hydrogen halides is

Answer»

`HF gt HCl gt HBr gt HI`
`HI gt HBr gt HCl gt HF`
`HCl gt HI gt HBr gt HF`
`HF = HCl = HBr= HI`

ANSWER :B
Discussion
26835.

The number of moles of Periodic acid used in oxidation of

Answer»


ANSWER :3
Discussion
26836.

Thenumberof molesof nitrogenobtainedby thecompletereactionsof one mole of C_(2)H_(5)NH_(2) withnitrousacidsis

Answer»

2
3
4
1

Answer :D
Discussion
26837.

The order of a gaseous phase reaction for which rate becomes half if volume of container having same amount of reactant is doubled is

Answer»

1
`1//2`
2
`1//3`

Solution :`r_1= k [A]^n`…(i)
where n is order of REACTION.
When `V_("FINAL")= 2V_("initial")," then " r_2=k[A/(2V)]^n=1/2…(ii)`
and `r_2= 1/2r_1`
Dividing (ii) by (i)
`:. 2 = 2^n or n = 1`
Discussion
26838.

The number of moles of oxalate KHC_(2)O_(4).H_(2)C_(2). 2H_(2)O oxidised by one mole of permanganate ion is :

Answer»

`3//4`
`1`
`5//4`
`6//4`

ANSWER :C
Discussion
26839.

The order of a single step reaction can be

Answer»

0
whole number
FRACTION
integer,fraction,ZERO
Discussion
26840.

The number of moles of NaCl in 3 litres of 3 M solution is :

Answer»

3
6
1
9

Answer :D
Discussion
26841.

The order of a gaseous phase reaction for which rate becomes half if volume of-container having same amount of reactant is doubled is:

Answer»

1
2
`1//2`
`1//3`

ANSWER :A
Discussion
26842.

The number of moles of NaCl in 2L of 3M NaCl solution is :

Answer»

0.667
6
1.5
1

Solution :MOLARITY `=("Moles")/("Vol in L")`
`3M=("Moles")/(2L)`
`:.` Moles `=3xx2=6`
Discussion
26843.

The order is reactivities of the following alkyl halides for a S_(N)2 reaction is

Answer»

`RF gt RCL gt RBR gt RI`
`RF gt RBr gt RCl gt RI`
`RCl gt RBr gt RF gt RI`
`RI gt RBr gt RCl gt RF`

Solution :WEAKER the `C - X` bond, GREATER is the reactivity, i.e., `RI gt RBr gt RCl gt CH_(3)Br`
Discussion
26844.

The number of moles of Maganate ion used in oxidation of cyclopentene to cyclopent (1.2) diol is____

Answer»


ANSWER :2
Discussion
26845.

The order of a chemical reaction can be zero and even a fraction but molecularity cannot be zero or a non-integer. What is molecularity of a reaction?

Answer»

Solution :The number of MOLECULES of the REACTANTS which collide simultaneously to bring about a chemical REACTION is CALLED molecularity.
Discussion
26846.

The number of moles of lead nitrate needed to coagulate 2 moles of colloidal [AgI] I^(-) is

Answer»

2
1
`1//2`
`2//3`

ANSWER :B
Discussion
26847.

The number of moles of KMnO_(4) that will be needed to react with one mole of sulphite ions in acidic solution is

Answer»

`2//5`
`3//5`
`4//5`
1

Answer :a
Discussion
26848.

The order in which the reagent must be used to separate the compound I-IV is:

Answer»

`NAOH,NaHCO_3,HCL`
`HCl, NaOH, NaHCO_3`
`NaHCO_3, NaOH, HCl`
`NaOH, HCl,NaHCO_3`

SOLUTION :It is SOLUBLE in `NaHCO_3` , I is soluble in NaOH and III is soluble in HCl.
Discussion
26849.

The order of a chemical reaction can be zero and even a fraction but molecularity cannot be zero or a non-integer. What do you mean by the order of a reaction ?

Answer»

Solution :It is SUM of POWERS of the CONCENTRATION terms in the expression.
Discussion
26850.

The order for thermal stability of BaCO_3,CaCO_3 and MgCO_3 is:

Answer»

`CaCO_3 GT MgCO_3 gt BaCO_3`
`MgCO_3 gt CaCO_3 gt BaCO_3`
`BaCO_3 gt MgCO_3 gt CaCO_3`
`BaCO_3 gt CaCO_3 gt MgCO_3`

ANSWER :D
Discussion