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14551.

Which of the following is an example of liquid dishevashing detergent?

Answer»

`CH_3(CH_2)_10-CH_2SO_3^(-)NA^(+)`


ANSWER :B
Discussion
14552.

Which of the following mixture is chromic acid

Answer»

`K_(2)Cr_(2)O_(7) and HCl`
`K_(2)SO_(4) and `conc. `H_(2)SO_(4)`
`H_(2)SO_(4) and HCl`

Solution :(Conc. `H_(2)SO_(4)+K_(2)Cr_(2)O_(7)`) mixture is CALLED as CHROMIC acid.
Discussion
14553.

Which of the following does not exists?

Answer»




NONE of the above

ANSWER :B
Discussion
14554.

What are the limitation of Arrehenius concept?

Answer»

Solution :(i) ARREHENIUS theory does not EXPLAIN the behaviour of acids and base in non-aqueous SOLVENTS such as acetone, tetrahydro furan.
(ii) This theory does not account for the basicity of the substance LIKE ammonia which do not possess hydroxyl group.
Discussion
14555.

Which of the following complex is not correctly matched with its geometry ?

Answer»

`[NiCl_(2)(Ph_(3)P)_(2)]-"tetrahedral"`
`[CO(Py)_(4)]^(2+)-"SQUARE PLANAR"`
`[Cu(CN)_(4)]^(3-)-"tetrahedral"`
`[Fe(CO)_(4)]^(2-)-"square planar"`

SOLUTION :`[Fe(CO)_(4)]^(2-) Rightarrow Tetrahedral`
Discussion
14556.

Which of the following species represent the example of dsp hybridization ?

Answer»

`[FE(CN)_6]^(3-)`
`[Ni(CN)_4]^(2-)`
`[Ag(CN)_2]^-`
`[CO(CN)_6]^(3-)`

ANSWER :B
Discussion
14557.

Which compound has an incorrect formula:

Answer»

Thionyl chloride-`SOCl_2`
Sulphuryl chloride-`SO_2Cl_2`
OLEUM-`H_2S_2O_6`
Phosphorus oxychloride- `POCl_3`

ANSWER :C
Discussion
14558.

What is Fenton,s Reagent?

Answer»

SOLUTION :`H_2O_2 + FeSO_4`
Discussion
14559.

Which is generally true about ionic compounds

Answer»

Have low boiling point
Have low MELTING point
Soluble in non POLAR solvents
Conduct electricity in the FUSED state

SOLUTION :GENERALLY ionic compound are conduct electricity in fused state.
Discussion
14560.

Zn^(2+)ions are....... and.......

Answer»

SOLUTION :DIAMAGNETIC,COLOURLESS
Discussion
14561.

The structural formula of the compound which yields ethylene upon reaction with zinc is:

Answer»


ANSWER :A
Discussion
14562.

Which of the following complexions is most stable ?

Answer»

`[Co(H_(2)O)_(6)]^(3+)`
`[CO(CN)_(6)]^(3-)`
`[CO(C_(2)O_(4))_(3)]^(3-)`
`[COF_(6)]^(3-)`

Solution :Stability of the complex ion depends upon the CHELATION. More is the number of chelating RINGS more will be the stability of complex ion. Among the given complex ion `C_(2)O_(4)^(2-)`is a bidentate LIGAND and thus forms chelation and will bemust stable .
`o X = C_(2) O_(4) [CO(C_(2)O_(4))_(3) ]^(2-)`
Discussion
14563.

underset(H^(+)) overset(EtOH) to A underset ((2)"Mel")overset((1)NaH)toB overset(H_(3)O^(+)) (to) C underset((2)AlCl_(3)) overset ((1)SOCl_(2))to D D is?

Answer»




SOLUTION :
Discussion
14564.

The vapour pressure of liquid methanol at 50^(@)C is 55.5 kPa .. Which are correct for equilibrium reaction attained in a closed vessel of 5L at 50^(@)C for the following equilibrium CH_3OH(l)

Answer»

`K_p=55.5Kpa`
`K_c=0.021mol*L^(-1)`
K_c=0.555mol*l^(-1)`
K_p=0.555kPa

Answer :A::B
Discussion
14565.

Which net work solid is a good conductor of electricity ?

Answer»


ANSWER :GRAPHITE
Discussion
14566.

Butan-2-one to butan-2-ol

Answer»

Solution :`CH_(3)-overset(O)overset(||)C-CH_(2)-CH_(3) underset("(or)"NaBH_(4))overset(H_(2)//PD)to CH_(3)-overset(OH)overset(|)CH-CH_(2)-CH_(3)`
Discussion
14567.

Which one of the following would be expected to be most highly ionised in water

Answer»

`CL - CH_(2) - CH_(2) - CH_(2) - COOH`
`CH_(3) CHClCH_(2) - COOH`
`CH_(3) - CH_(2) - CHCl - COOH`
`CH_(3) - CH_(2) - CH_(2) - COOH`

Answer :C
Discussion
14568.

What type of crystal structure is shown by graphite ?

Answer»

SOLUTION :HEXAGONAL
Discussion
14569.

What happens when thiosulphate ion is treated with permanganate ion?

Answer»

SOLUTION :PERMANGANATE ion oxidises THIOSULPHATE into sulphate.
`8MnO_(4)^(-) +S_(2)O_(3)^(2-)+ H_(2)O to6SO_(4)^(2-) +8MnO_(2) + 2OH^(-)`
Discussion
14570.

Which of the following does not undergoes nitration?

Answer»

`CH_(3) - CH_(3)`
`CH_(3)NH_(2)`
`CH_(4)`
`CH_(3) - CH_(2)- CH_(3)`

SOLUTION :`CH_(3) - overset(CH_(3))overset(|)(C)= underset (CH_(3))underset(|)underset(CH_(2))underset(|)(C)- NO_(2) + H - OH overset(H^(+))to CH_(3) -overset(CH_(3))overset(|)(C) = O + CH_(3) - CH_(2) = CH_(2) - NO_(2) `
Discussion
14571.

What is the medicinal use of narcotic drugs?

Answer»

Solution :Narcotic ANALGESICS when administered in medicinal dose, relieve pain and PRODUCE sleep. SINCE, these drugs relieve pain and produce sleep, therefore are chiefly used for the relief of postoperative pain, cardiac pain and pains of terminal cancer, and in child BIRTH.
Discussion
14572.

Which of the following hydrides of group 15 has maximum basic character?

Answer»

`NH_(3)`
`BiH_(3)`
`AsH_(3)`
`PH_(3)`

SOLUTION :`NH_(3)` is most basic in the group.
Discussion
14573.

Why biodegradable synthetic polymers have been designed and developed ?

Answer»

Solution :A large number of polymers are quite RESISTANT to the environmental DEGRADATION PROCESSES and are thus responsible for the accumulation of polymeric solid waste materials.
These solid wastes cause acute environmental problems and remain undegraded for quite a LONG time.
In VIEW of the general awareness and concern for the problems created by the polymeric solid wastes, certain new biodegradable synthetic polymers have been designed and developed.
Discussion
14574.

What would be the best starting material for the preparation of tert. Butyl alcohol using Grignard reagent:

Answer»




None

Answer :A
Discussion
14575.

The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statement(s) is (are) correct?

Answer»

`T_3 GT T_1`
`T_1 = T_2`
`DeltaU_("isothermal") gt DeltaU_("ADIABATIC")`
`W_("isothermal") gt W_("adiabatic")`

ANSWER :A
Discussion
14576.

Which of the following dicarboxylic acid will give cycle alkanone on heating?

Answer»




ANSWER :A::B
Discussion
14577.

Which of the following aqueous solutions has a higher vapour pressure if the density of water is 1g//"cc" ? (a) Solution having mole fraction of cane sugar =0.1 (b) Solution having molal concentration =1m

Answer»


ANSWER :(B)
Discussion
14578.

Which of the following plots represents an exothermic reaction?

Answer»




Solution :a) `K_(p)` and `DELTAH` are related to each other as:
In `K_(p)=(-DeltaH)/(RT)` + constant term `DeltaH` is negative, then the relation is: LN `K_(p) = (DeltaH)/(RT)` + constant term Graph.
`i_(n)K_(p) "vs" 1/T` similar to Y = mx + C, where m and C are both positive.
therefore, graph SHOWN in option a) is correct.
Discussion
14579.

Which of the following liberates H_(2), with nitric acid?

Answer»

Zn
Cu
Mn
Hg

Answer :C
Discussion
14580.

Which one of the following oxyacids of chlorine is the least oxidising in nature ?

Answer»

`HCIO`
`HCIO_(2)`
`HCIO_(4)`
`HCIO_(3)`

Solution :`HClO_(4)` is having weak OXIDISING nature
Discussion
14581.

Which does not liberate O_2 on heating ?

Answer»

`MGO`
`NaNO_3`
`Pb_3O_4`
`KClO_3`

ANSWER :A
Discussion
14582.

Tropolone is an example of :

Answer»

BENZENOID aromatic COMPOUND
alicyclic compound
non-benzenoid aromatic compound
acyclic compound

ANSWER :C
Discussion
14583.

[X] + H_(2)SO_(4) to [Y] a colourless gas with irritating smell, [Y] +K_(2)Cr_(2)O_(7) + H_(2)SO_(4) to "Green solution", [X] and [Y] is :

Answer»

`SO_(3)^(2-), SO_(2)`
`Cl^(-), HCl`
`S^(2-), H_(2)S`
`CO_(3)^(2-), CO_(2)`

Answer :A::C
Discussion
14584.

Which of the following reactions corresponds to the definition of enthalpy of formation

Answer»

`C_((g))+O_(2(g))rarrCO_(2(g))`
`C_((s))+O_(2(L))rarrCO_(2(g))`
`C_((s))+O_(2(g))rarrCO_(2(g))`
`C_((l))+O_(2(s))rarrCO_(2(g))`

Solution :Enthalpy of formation is the HEAT change when1 MOLE of a substance is formed from its constituent elements in GASEOUS state.
Discussion
14585.

Which of the following is used in the preparation of RMgX?

Answer»

DIMETHYL ether
Diethyl ether
Ethyl METHYL ether
Ethanol

Answer :B
Discussion
14586.

What is most harmful for life on globe ?

Answer»

Deforestation
Soil erosion
Increasing desert
Nuclear FAIL out

Answer :D
Discussion
14587.

Which among the following is wrong about isodiaphere?

Answer»

They have the same differenc of neutrons and protons or same isotopic number.
Nuclide and its decay PRODUCT after `ALPHA`-emission are isodiapheres.
`._(Z)A^(M) to ._(Z - 2)B^(M - 4) + ._(2)He^(4)`
'A' and 'B' are isodiapheres
All are correct.

Answer :d
Discussion
14588.

The spin magnetic moment of [MnBr_(4)]^(2-) is 5.9 B.M. Its expected geometry is :

Answer»

SQUARE planar
Octahedral
TRIGONAL bipyramidal
TETRAHEDRAL.

Answer :D
Discussion
14589.

Using IUPAC norms write the formulae for the following : Sodium dicyanidoaurate(I)

Answer»

SOLUTION :`Na[AU(CN)_(2)]`
SODIUM dicyanidoaurate(I)
Discussion
14590.

The resistance of solution of a salt occupying a volume between two platinum electrode 1.8cm apart and 5.4cm^(2) in area was found to be 30 ohm. Calculate the conductivity of the solutions.

Answer»

Solution :RESISTANCE of a solution R=32ohm
DISTANCE between two electrodes =1=1.8cm
AREA of the electrode `A=5.4 cm^(2)`
FORMULA:
`"CONDUCTIVITY "=("Cell constant")/("Resistance")=(1.8)/(5.4)xx (1)/(32)=0.01404.Scm^(-1)`
Discussion
14591.

Write IUPAC names of the following

Answer»

SOLUTION :(i) 3-Bromo-2-methylpropene (II) 4-Bromo-3-methylpent-2-ene (III) 1-Bromobut-2-ene (IV) 1-Bromo-2-methylbut-2-ene
Discussion
14592.

Which of the following is not basic alpha-amino acid?

Answer»

Histidine
Lysine
Arginine
Valine

Answer :D
Discussion
14593.

Which one of the following is an optically active compound

Answer»

n-propanol
2-chlorobutane
n-butanol
4-hydroxyheptane

Solution :`{:(""H),("|"),(CH_(3)-C^(**)-CH_(2)-CH_(3)),("|"),(""Cl),("2- Chlorobutane"):}`
because it contain chiral carbon ATOM.
Discussion
14594.

Tincture of iodine is -

Answer»

AQUEOUS SOLUTION of `I_2`
solution of `I_2` in aqueous KL
alcoholic solution of `I_2`
aqueous solution of Kl

Solution :TINCTURE of IODINE is an aqueous solution of `I_2` in KL
Discussion
14595.

Write the general formula of silicones.

Answer»

SOLUTION :`-O[-SI(CH_3)_2-O-]_nSi(CH_3)_2-`
Discussion
14596.

Which reagent is used to distinguish phenol and benzoic acid ?

Answer»

NEUTRAL `FeCl_(3)`
AQ. NaOH
Tollen's reagent
Schiff's reagent

Solution :Neutral `FeCl_(3)`
Discussion
14597.

Which of the following is/are transition element andwhy ? Zn,Cd, Ag,Fe, Ni

Answer»

SOLUTION :`FE , NI , AG`
Discussion
14598.

When benzoic acid is treated with sulphuric acid in the presence of SO_(3) , the product is :

Answer»

<P>m- Sulphobenzoic acid
Sulphanilic acid
o- and p -Sulphobenzoic acid
Benzene.

Answer :A
Discussion
14599.

Which of the following is not a water absorber and dehydrating substance

Answer»

<P>Silica gel
`P_(2)O_(5)`
Conc.`H_(2)SO_(4)`
AQUEOUS `CaCl_(2)`

SOLUTION :Aqueous `CaCl_(2)` or HYDRATED `CaCl_(2)` can not act as dehydrating agent.
Discussion
14600.

Which does not oxidised by bromine water:

Answer»

`Fe^(2+)` to `Fe^(3+)`
`CU^+ ` to`Cu^(2+)`
`Mn^(2+)`to `MnO_4^-`
`Sn^(2+)` to `Sn^(4+)`

ANSWER :C
Discussion