Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

19051.

Which among the following sets of reactatns will produce anisole?

Answer»

HCHO, RMgX
`C_6H_5OH; NAOH; CH_3I`
`C_6H_5OH` ; neutral `FeCl_3`
`C_(6)H_(5)CH_(3), CH_(3)COCl`,`AlCl_3`

ANSWER :C
Discussion
19052.

The reduction electrode potential E of 0.1 M solution ofM^+ ions(E^o(rp) = -2.36V ) is :

Answer»

`-2.41`
`+2.41`
`-4.82`
None

Answer :A
Discussion
19053.

Which one of the following nitro-compounds does not react with nitrous acid ?

Answer»




ANSWER :D
Discussion
19054.

Which of the following is a condensation polymer:

Answer»

Polystyrene
Neoprene
PAN
Poly (ETHYLENE terphthalate)

ANSWER :D
Discussion
19055.

Which of the following can be used as local anaesthetic:

Answer»

`CHCl_3`
`C_2H_4` with `O_2`
`C_2H_5Cl`
`C_2H_5OH`

ANSWER :C
Discussion
19056.

What is Bessemerisation ?

Answer»

SOLUTION :It is the process of extraction of COPPER from copper PYRITE ORE.
Discussion
19057.

Which of the following is an example of aldol condensation :

Answer»

`2CH_3CHOoverset (DIL NAOH) RARR ch_3CHOHC_2CHO`
`HCHOoverset (dil NaOH) rarr CH_3OH`
`C_6H_5CHO + HCHOoverset (dil NaOH) rarr C_6H_5CH_2OH`
`2CH_3COCH_3`OVERSET (CONC NaOH) rarr

Answer :A
Discussion
19058.

White phosphorus reacts with chlorine and the product hydrolyses in the presence of water. Calculate the mass of HCl obtained by the hydrolysis of the product formed by the reaction of 62 g of white phosphorus with chlorine in the presence of water.

Answer»

Solution :`underset(1 mol)(P_(4) + 6Cl_(2)) + 12H_(2)O to 4H_(3)PO_(3) + underset(12 "mol")(12HCl)`
`therefore 0.5` mol
`therefore` Moles of HCl obtained `=12 xx 0.5 = 6`
`therefore` MASS of HCl obtained = Moles x Mol. Mass
`=6 xx 36.5`
`=219.0` g
Discussion
19059.

Which among the following comjpounds will give a secondary alcohol on reacting with Grignard reagent followed by acid hydrolysis? I. HCHO II. C_(2)H_(5)CHO III. CH_(3)COOCH_(3) IV. RCOOC_(2)H_(5) Select the correct answer using the codes given below:

Answer»

Only II
Only III
II and IV
III and IV

Solution :ADDITION of GRIGNARD reagents to alddehdyes other than formaldehyde followed by ACID hydrolysis give SECONDARY alcohols, i.e.,
Discussion
19060.

Which one of the following is an amor- phous solid ?

Answer»

GLASS
`SiO_(2)`
NaCl
Na

Solution :Glass
Discussion
19061.

The tetrahedral crystal field splitting is only of the octahedral splitting:

Answer»

`1//9`
`2//9`
`4//9`
`5//9`

ANSWER :C
Discussion
19062.

What is the role of ZnCl_(2) in dry cell?

Answer»

Solution :`ZnCl_(2)` COMBINES with the `NH_(3)` produced to form the COMPLEX salt `[Zn(NH_(3))_(2)Cl_(2)]` as otherwise the pressure developed DUE to `NH_(3)` would crack the SEAL of the cell.
Discussion
19063.

Which of the following is a co-polymer?

Answer»

Orlon
PVC
TEFLON
PHBV

Solution : PHBV
Discussion
19064.

Vapour density of a gas is 11.2. The volume occupied by 11.2 g of gas at NTP is

Answer»

22.4 litre
1 litre
11.2 litre
None

Answer :C
Discussion
19065.

Which one of the following is paramagnetic in nature?

Answer»

`Sc^(3+)`
`TI^(4+)`
`V^(5+)`
`CU^(2+)`

Solution :`Cu^(2+)`
Discussion
19066.

What are the applications of Kohlrausch's law ?

Answer»

Solution :Applications of KOHLRAUSCH's law :
(1) It can be used to evaluate the molar conductivity of any electrolyte at infinitedilution or zero concentrationwhich cannot be exprimentally measured.
(2)` wedge_(0)` for weak electrolytes can be obtained from `wedge_(0)` values of strong electrolytes involvingsimilar cations or anions.
(3) Ionic PRODUCT of water `(K_(omega))`, solubility and solubility product of sparingly soluble electrolytes can be CALCULATED.
(4) Degree of dissociation of weak electrolytes can be calculated from `wedge_(0)` values.
Discussion
19067.

Which of the following reaction involve rearrangement?

Answer»




ANSWER :B::C::D
Discussion
19068.

Which of the following is an endothermic reaction

Answer»

`2H_(2)+O_(2)rarr2H_(2)O`
`N_(2)+O_(2)rarr2NO`
`2NaOH+H_(2)SO_(4)rarrNa_(2)SO_(4)+2H_(2)O`
`3O_(2)+C_(2)H_(5)OHrarr2CO_(2)+3H_(2)O`

Answer :B
Discussion
19069.

Which of the following method produce cyclopentanone as the major product

Answer»


`HOOC -CH_2 CH_2 CH_2 -COOH OVERSET(MnO,300^@)to`

All the above

Solution :Cyclopentanoneas MAJORPRODUCT
Discussion
19070.

What is Hinsberg reagent?

Answer»

Solution :Benzenesulphonyl CHLORIDE `(C_(6)H_(5)SO_(2)Cl)` is called Hinsberg's reagent.
Discussion
19071.

The standard electrode potentials of some electrodes are : {:("Electrode",Zn^(2+)"|"Zn,Cd^(2+)"|"Cd,Ag^(+)"|"Ag,Fe^(2+)"|"Fe),(E^(@)(V),-0.76,-0.40,0.80V,-0.44V):}Which of the following cells are feasible and give their E^(@) cell ? (i) Zn|Zn^(2+)||Cd^(2+)|Cd(ii)Fe|Fe^(2+)||Zn^(2+)|Zn (iii)Cd|Cd^(2+)"||"Ag^(+) (iv) Fe|Fe^(2+)"||"Ag^(2+)|Ag

Answer»

(i) , (iii) , (IV)
(i) , (iii)
(ii)
(ii) , (iv)

Solution :(i) FEASIBLE ,`E^(@)=+0.36V`
(ii) Not feasible , `E^(@)=-0.32V`
(iii)Feasible ,`E^(@)=+1.20V`
(iv)Feasible , `E^(@)=+1.24V`
so, OPTION (A) us correct
Discussion
19072.

Which name is given to spatial arrangements in coordination compounds ?

Answer»

SOLUTION :Polyhadra
Discussion
19073.

Which of the following is a bridging ligand

Answer»

`OH^-`
`NH_3`
`EDTA^(4-)`
`H_2O`

ANSWER :A
Discussion
19074.

What will be the vapour pressure of solution prepasred by dissolving 18 gram Glucose to 178.2 gram water ?

Answer»

759.00 MM
7.60 mm
76.00 mm
752.40 mm

Solution :`(P^(@)-P)/(P^(@))=(N)/(n+N)=(n)/(N)` for solvent `p^(@)=760` mm
` THEREFORE (P^(@)-P)/(P^(@))=(W xx M_(0))/(M xx W_(0))`
Discussion
19075.

Which of the following compounds show optical isomerism ? (P) cis-[Co(NH_(3))_(4)Cl_(2)]^(+)""(Q) "trans"-[Co(en)_(2)Cl_(2)]^(+) (R ) cis-[Co(en)_(2)Cl_(2)]^(+)""(S) [Co(en)_(3)]^(3+) select the correct answer using the codes given below :

Answer»

<P>P and Q
Q and R
R and S
P, R and S

Answer :C
Discussion
19076.

Which one of the following properties is more applicable to alkaline earth metals compared with alkali metals ?

Answer»

GREATER IONIC radii
Lower IONIZATION energies
Lesser BASIC hydroxides
Lower electronegativities

Answer :C
Discussion
19077.

Which of the following statement is correct for a lyophilic solution?

Answer»

It is not EASILY solvated
It is unstable
The coagulation of this sol is irreversible in nature
It is quite STABLE in a SOLVENT

SOLUTION :LYOPHILIC solution is easily solvated and quite stable in solvent.
Discussion
19078.

Which of the following reaction is not possible

Answer»

`C_2H_5-O-C_2H_5 overset(Na)to`
`R-X + "MOIST" Ag_2O to`
`C_2H_5OH underset"453 K"overset("CONC." H_2SO_4)to`
`C_2H_5-Cl overset"ALC. KOH"to `

ANSWER :A
Discussion
19079.

Under identical conditions, the S_(N^(1)) reaction will occur most efficiently with

Answer»

Tert-butyl chloride
1-chlorobutane
2-methyl-1-chloropropane
2-chlorobutane

Solution :`underset("1-butyl chloride")(CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Cl)`
`underset("1-chlorobuta ne")(CH_(3)-CH_(2)-CH_(2)-CH_(2)-Cl)`
`underset("2-methyl-1-chloroprop ANE")(CH_(3)-underset(CH_(3))underset(|)(C)H-CH_(2)Cl)""underset("2-chlorobutane")(CH_(3)-CH_(2)-underset(Cl)underset(|)(C)H-CH_(3))`.
As t-butyl chloride will form `3^(@)` carbocation which is most stable THUS `S_(N^(1))` REACTION will occur most efficiently with t-butyl chloride.
Discussion
19080.

Tollen's reagent is

Answer»

AQUEOUS copper sulphate
Alkaline SODIUM potassium tartarate
Ammoniacal silver nitrate
Ammoniacal silver chloride

Answer :C
Discussion
19081.

How is phosphine prepard in the laboratory?

Answer»

<P>

SOLUTION :White phosphorous
Phosphire is prepared by heating white phosphorous with conc. `NAOH` in inert atmosphere of `CO_(2)`.
`P_(4)+3NaOH+3H_(2)Orarr PH_(3)+3NaH_(2)PO_(2)`
Discussion
19082.

The shape of XeF_(3)^(+) is :

Answer»

TRIGONAL PLANAR
Pyramidal
Bent T-shpae
See-saw

Solution :`XeF_(3)^(+)` HYBRIDISATION of `Xe : sp^(3)d`
Discussion
19083.

What are the uses of ethanol.

Answer»

SOLUTION :1. Ethanol is used as an important BEVERAGE.
2. It is also used in the PREPARATION of (a) Paints and varnishes (B) Organie compounds like ether, chloroform, iodoform, etc., (c) Dyes, transparent soaps.
3. As a substitute for petrol under the name power alcohol used as fuel for aeroplane
4. It is used as a preservative for biological specimens.
Discussion
19084.

What is the oxidation state in coordination compound ?

Answer»

Solution :The oxidation STATE of a central metal atom in a coordination entity is defined as the charge it would bear if all the lighands were removed along with the ELECTRON pairs that were shared with the central atom.
In naming a COMPLEX, it is represented by a Roman numeral.
For e.g., in coordination entity `[FE(CN)_(6)]^(4-)` the oxidation state of iron is represented as (II).
In `[Fe(CN)_(6)]^(4-)`, let the oxidation number of iron is
The NET charge `=-4`
`x+6(-1)=-4`
`x-6=-4`
`x=6-4=+2`
So, iron oxidation state (II).
Discussion
19085.

What is the formula of compound present in brown ring?

Answer»

SOLUTION :`3FE^(2+)+NO_(3)^(ɵ)+4H^(o+)to3Fe^(2+)+NO+2H_(2)O`
`FeSO_(4)+NOtoFeSO_(4).NO` or `[Fe(H_(2)O)_(5)NO]SO_(4)`
Discussion
19086.

Which of the following will decreases the pH of a 50 ml solution of 0.01 M HCl

Answer»

Addition of 5 ml of 1 M HCL
Addition of 50 ml of 0.01 M HCl
Addition of 50 mL of 0.002 M HCl
Addition of Mg

SOLUTION :Addition of 5ml of 1M HCl will decrease the pH, because only this will increase the `H^(+)` ion concentration in the solution.
Discussion
19087.

Which of the following metals has been used in making boats because it has resistance to corrosion by sea water ?

Answer»

W
Cu
Ni
Ti

Answer :D
Discussion
19088.

Which one of the following contain isopropyl group ?

Answer»

2,2,3,3-tetramethyl pentane
2,4-dimethy lhexone
2,2,3-trimethylpentane
3,3- dimethylpentane

Solution :
It CONTAINS ISOPROPYL GROUP.
Discussion
19089.

Which one of the following is an example for homogeneous catalysis?

Answer»

MANUFACTURE of sulphuric acid by CONTACT process
Manufacture of ammonia by HABER's process
Oxidation of ammonia carried out in the presence of platinum gauze
HYDROLYSIS of cane sugar with mineral acid

Solution :Hydrolysis of cane sugar with mineral acid
Discussion
19090.

What are emulsions?

Answer»

Solution :(i) Emulsions are liquid - liquid colloidal SYSTEMS. (ii) If a MIXTURE of two immiscible or partially miscible LIQUIDS are shaken, a coarse dispersion of one liquid in the other is OBTAINED which is called EMULSION, Eg: In milk, liquid fat is dispersed in water.
Discussion
19091.

Which one of the following should be most stable

Answer»

`H_(2)^(+)`
`H^(+)`
H
`H^(-)`

Solution :`H^(-)` is most stable due to its FULL filled 1s-orbital.
Discussion
19092.

Which one of the elements is not found in nature?

Answer»

Radium
Technetium
Polonium
Helium.

ANSWER :B
Discussion
19093.

Write the formula and IUPAC name of aspirin.

Answer»

SOLUTION :
Discussion
19094.

Which of the following process is not associated with steel making?

Answer»

BESSEMER process
Open-Hearth process
Kaldo process
Auto-oxidation

Answer :D
Discussion
19095.

What is the difference between analgesics and anaesthetics?

Answer»

Solution :ANALGESICS are medicines used to reduce pain of any kind in the BODY while ANAESTHETICS are medicines GIVEN to the patient so that he does not feel pain during OPERATION.
Discussion
19096.

When iodine reacts with NaF, NaBr and NaCl:

Answer»

It GIVES MIXTURE of `F_2 , Cl_2 and Br_2`
It gives chlorine
It gives bromine
None of the above

Answer :D
Discussion
19097.

What is observed when tertiary alcohol is subjected to Lucas test ?

Answer»

Oily droplets on the UPPER surface
Mixture REMAIN unreacted
Mixture becomes milky WHITE within 5 minutes
NONE of these

Solution :Oily droplets on the upper surface
Discussion
19098.

When two reactants A& B are mixed to give products C & D the reaction quotient Q, at the initial stages of the reaction.

Answer»

is zero
decreases with TIME
is INDEPENDENT of time
INCREASES with time

ANSWER :D
Discussion
19099.

ZnO can be reduced to the metal by heating with carbon but not Cr_(2)O_(3).Justify your answer.

Answer»

Solution :Carbon has more affinity for oxygen than ZINC, whereas chromium has higher affinity for oxygen than zinc. HENCE `ZNO` can be reduced to the metal by HEATING with carbon but not `Cr_(2)O_(3)`.
Discussion
19100.

What is a polypeptide ? Give one example.

Answer»

SOLUTION :Polypeptides are formed when several molecules of `alpha`-AMINO ACIDS are joined together by peptide bonds , For example , oxytocin is a nanopeptide , i.e., CONTAINS 9 `alpha`-amino acid UNITS while insulin contains 51 `alpha`-amino acid units.
Discussion