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.

23251.

Which of the following compounds has the highest boiling point?

Answer»

`CH_(3)CH_(2)CH_(2)Cl`
`CH_(3)CH_(2)CH_(2)CH_(2)Cl`
`CH_(3)CH(CH_(3))CH_(2)Cl`
`(CH_(3))_(3)C Cl`

Answer :B
Discussion
23252.

Write the product of the following reaction

Answer»


ANSWER :`(##RES_CHM_CCAK_E01_002_A01##)`
Discussion
23253.

What is the effect of increasing pH on K_(2)Cr_(2)O_(7) solution ?

Answer»

Solution :It changes from orange to yellow colour due to the FOLLOWING reaction :
`Cr_(2)O_(7)^(2-)+2OH^(-)to2CrO_(4)^(2-)+H_(2)O`
Discussion
23254.

Which one of the following compounds will not given iodoform by the reaction with iodine and NaOH?

Answer»

Ethanol
Methanol
Acetaldehyde
Acetone

Answer :B
Discussion
23255.

Which is the correct order of increasing energy of the listed orbitlas in the atom of titanium? (Atomic No. Z=22)

Answer»

3S 3p 3d 4s
3s 3p 4s 3d
3s 4s 3p 3d
4s 3s 3p 3d

Solution :Ti(22) = `1s^(2) 2s^(2) 2P^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(2)`
order of ENERGY is 3s 3p 4s 3d
Discussion
23256.

Which of the following is a natural polymer?

Answer»

Bakelite
Cellulose
`PVC`
Neoprene

Answer :B
Discussion
23257.

What is the effect of temperature on the electrical conductance of electrolyte ?

Answer»

SOLUTION :TEMPERATURE INCREASES, ELECTRICAL CONDUCTANCE increases.
Discussion
23258.

Which M-M bond has highest bond energy?

Answer»

`Sn-Sn`
`Ge-Ge`
`C-C`
`Si-Si`.

ANSWER :C
Discussion
23259.

The semipermeable membrane used in Berkely -Hartley method is

Answer»

ANIMAL BLADDER membrane
copper phosphate
copper ferricyanide
Copper ferrocyanide

Answer :D
Discussion
23260.

Which of the following is not a true statement about the detergents?

Answer»

Anionic detergents are sodium SALTS of sulphonatedlong CHAIN ALCOHOLS or hydrocarbons.
Cationicdetergents are quarternary ammonium salts of AMINES with acetates, chloridesor bromides as an ions.
Non-ionic detergents do not CONTAIN any ion in their constitution.
Detergents containingbranched hydrocarbons chains are biodegradable .

Solution :Detergents containing branched hydrocarbon chains are non-biodergradable.
Discussion
23261.

Which chemical compounds to food cause slow activity of oxygen ?

Answer»

Preservatives
ANTIOXIDANTS
Food colours
Synthetic SWEETENER 

SOLUTION :Antioxidants
Discussion
23262.

Zincile and colamine respectively are

Answer»

OXIDE and CARBONATE ore AL Zn
Carbonate and oxide ore of Zn
Oxide and sulphate or of Zn
Sulphate and SULPHITE gre of Zn

Answer :D
Discussion
23263.

Which of the following will be the major product when is treated with dil. H_(2)SO_(4) in the presence of HgSO_(4) ?

Answer»




SOLUTION :
Discussion
23264.

Which of the following compound has strong intermolecular Hydrogen bond ?

Answer»

METHYL HYDROXY BENZENE
PHENOL
Benzaldehyde
p-hydroxy benzaldehyde

Solution : Phenol
Discussion
23265.

Three dimensional molecular structure with cross links are formed in the case of a

Answer»

THERMOPLASTIC
thermosetting plastic
Both (a) and (B)
NONE of the above

Solution :Thermosetting plastics have three dimensional cross linked STRUCTURE.
Discussion
23266.

Which one of the following is an example for tranquilizer?

Answer»

CIMETIDINE
DIAZEPAM
histamine
PABA

SOLUTION :diazepam
Discussion
23267.

Which of the folliwng compounds will show faster ArSN^(2) reactions?

Answer»




Solution :`ArSN^(2)` REACTIONS are favoured by STRONG `EWG, -I` EFFECT of `F` is highest (more `EN` of `F`)

Discussion
23268.

The vapour pressure of liquid _____ with rise of temperature .

Answer»

SOLUTION :ATMOSPHERIC PRESSURE.
Discussion
23269.

Whichformoftheiron isthepurest form of commercialiron ?

Answer»

Solution :Wroughiron isthepurestform ofcommercialiron. It containsabout` 0*2 - 0*5% ` carbonbesidestracescarbonbesidestracesofPandSi in FORMOF SLAG. Carbonin wroughironis presentpartlyas graphiteand partlyascementile,` Fe_ 3C`.
Discussion
23270.

Which of the following is most electronegative?

Answer»

O
S
TE
Se

Solution :`{:(,"ELEMENT",O,S,SC,Te,PO),(,"ELECTRONEGATIVITY",3.5,2.5,2.4,2.1,2.0):}`
Discussion
23271.

Which of the following is not a chlorinated insecticide ?

Answer»

DDT
Methoxychlor
Parathion
BHC

Answer :C
Discussion
23272.

Which of the following has less bond enthalpy ?

Answer»

`CH_(3)-I`
`CH_(3)-F`
`CH_(3)-CL`
`CH_(3)-Br`

ANSWER :A
Discussion
23273.

Which has highest boiling point under point under 1 atm pressue ?

Answer»

0.1 M NACI
0.1 M Scurose
0.1 M `BaCI_(2)`
0.1 M Glucose.

SOLUTION :0.1 M `BaCI_(2)` because it will form maximum ions (3) in solution
`Deltat_(b)=iKbm`
Discussion
23274.

Write the structure of trans isomer of [Co(NH_3)_4CI_2]^-.

Answer»

SOLUTION :
Discussion
23275.

Which of the following rate laws has an overall order of 0.5 for reactioninvolving substances x , y and z

Answer»

Rate = `K (C_(x)) (C_(y)) (C_(z))`
Rate = `K (C_(x))^(0.5) (C_(y))^(0.5) (C_(z))^(0.5)`
Rate = `K(C_(x))^(1.5) (C_(y))^(-1) (C_(z))^(0)`
Rate = `K(C_(x)) (C_(z))^(n) // (C_(y))^(2)`

SOLUTION :Order of REACTION is SUM of the power raised on concentration terms to EXPRESS rate expression.
Discussion
23276.

Which of the following is chemical twins ?

Answer»

Zr and TA
Nb and W
Ta and Nb
Tc and Os

ANSWER :C
Discussion
23277.

Which kind of isomerism is exhibited by octahedral [Co(NH_(3))_(2)Br_(2)]Cl ?

Answer»

GEOMETRICAL and ionization
Geometrical and optical
Optical and ionization
Geometrical only

Answer :A
Discussion
23278.

Which compound not reacts with phenol ?

Answer»

`Na_(2)CO_(3)`
`NaHCO_(3)`
(A) and (B) both
NaOH

Answer :C
Discussion
23279.

Which of the following reaction of xenon compounds is not feasible ?

Answer»

`XeO_(3)+6HF RARR XeF_(6)+3H_(2)O`
`3XeF_(4)+6H_(2)Orarr 2Xe+XeO_(3)+12HF+1.5O_(2)`
`2XeF_(2)+2H_(2)Orarr 2Xe+4HF+O_(2)`
`XeF_(6)+RbF rarr Rb[XeF_(7)].`

Solution :The REACTION is not feasible because `XeF_(6)` formed is readily hydrolysed to give `XeO_(3)`.
`XeF_(6)+3H_(2)Orarr XeO_(3)+6HF`
Discussion
23280.

There are four alcohols P,Q,R and S which have 3,2,1 and zero alpha hydrogen atom (s) respectively. Which on of the following will give an alkene when heated with copper

Answer»

<P>P
Q
R
S

ANSWER :D
Discussion
23281.

When an ideal diatomic has is heated at constant pressure the fraction of the heat energy supplied which oncreases the internal energy of the gas is :

Answer»

2/5
3/5
3/7
5/7

Answer :D
Discussion
23282.

The resistance of 0.5 N solution of an electrolyte in a conductivity cell was found to be 45 ohms. If the electrodes in the cell are 2.2 cm apart and have an area of 3.8 cm^2then the equivalent conductance (in Scm^2 eq^(-1) ) of a solution is

Answer»

25.73
15.75
30.75
35.75

Answer :A
Discussion
23283.

Which among the following is an intensive property?

Answer»

Enthalpy
Entropy
Gibbs FREE energy
Pressure

Answer :B
Discussion
23284.

When alkyl halide is heated with dry Ag_(2)O,it produces

Answer»

ester
ether
ketone
alcohol

Answer :B
Discussion
23285.

Which of the following compounds will give haloform test?

Answer»

`CH_(3)COCH_(2)l`
`CH_(3)-CHCl-CH_(3)`
`C_(6)H_(5)COCH_(3)`
`CH_(3)CH_(2)Br`

Solution :`CH_(3)COCH_(2)lunderset(NaOH)overset(l_(2))toCH_(3)`
`C_(6)H_(6)COCH_(3)underset(NaOH)overset(l_(2))toCHl_(3)`
Under the basic conditions of the REACTION, both `CH_(3)CHClCH_(3)andCH_(3)CH_(2)Br` will further undergo hydrolysis to GIVE `CH_(3)CHOHCH_(3)andCH_(3)CH_(2)OH` respectively which will give iodoform test.
Discussion
23286.

Which one of the following chlorides will not fume in air?

Answer»

`BiCl_(3)`
`C Cl_(4)`
`PCl_(5)`
NONE of these.

Answer :B
Discussion
23287.

When a gas is bubbled through water at 298 K, a very dilute solution of the gas is obtained. Henry's law constant for the gas at 298 K is 100 kbar. If the gas exerts a partial pressure of 1 bar, the number of millimoles of the gas dissolved in one litre of water is

Answer»

`0.555`
`5.55`
`0.0555`
`55.5`

SOLUTION :`k_(H)` = 100 kbar, p = 1 bar
`p=k_(H)xx` mole fraction
Mole fraction `=(p)/(k_(H))=(1)/(100xx10^(3))=10^(-5)`
Mole fraction `=("Mole of gas")/("Total moles")`
Moles of water `=("Weight of water")/("MOLECULAR weight of water")`
Weight of water= 1000g `(because 1000 mL = 1000g)`
Moles `=(1000)/(18)=55.5`
Mole fraction `= 10^(-5)=(x)/(55.5+x)`
As `55.5 gt gt gt x`, thus neglecting x from denominator
`10^(-5)=(x)/(55.5)rArr x = 55.5xx10^(-5)` moles
or `55.5xx10^(-2)` millimoles = 0.555 millimoles.
Discussion
23288.

Which element among the lanthanides has the smallest atomic radius

Answer»

Cerium
Lutetium
Europium
Gadolinium

Answer :B
Discussion
23289.

Which one of the following compounds is different from the rest in terms of undergoing hydrolysis to form simpler compounds?

Answer»

Sucrose
Maltose
Lactose
Glucose

Answer :D
Discussion
23290.

When a substabce is dissolved in a solvent, the vapour pressure of solvent decresases. This brings:

Answer»

An INCREASE in b.pt. of the solution
A DECREASE in b.pt. of a solution
An increase in f.pt. of the solvent
None

Answer :A
Discussion
23291.

What is the correct order of rectivity of alchohols in the following reaction ?

Answer»

`1^@ GT 2^@ gt 3^@`
`1^@ LT 2^@ gt 3^@ `
`3^@ gt 2^@ gt 1^@`
`3^@ lt 2^@ lt 1^@`

ANSWER :C
Discussion
23292.

Which of the element of oxygen family is most poisonous to human race

Answer»

O
S
SE
NONE

ANSWER :C
Discussion
23293.

Which of the following processes involves the roasting process ?

Answer»

`ZncO_3 RARR ZNO + CO_2`
`Fe_2O_3 + 3C rarr 2FE _ 3CO`
`2PbS + 3O_2 rarr 2PbO + 2SO_2`
`Al_2O_3 cdot2H_2O rarr Al_2O_3 + 2H_2O`

Answer :C
Discussion
23294.

What happens when electric field is applied to colloidal solution ?

Answer»

SOLUTION :The charged COLLOIDAL particles MOVE towards oppositely charged ELECTRODES.
Discussion
23295.

Which one of the following is a positively charged colloid?

Answer»

AG
AU
BASIC DYES
Clay

Solution : Basic dyes
Discussion
23296.

Which of the statement is not true -

Answer»

`K_(2)Cr_(2)O_(7)` solution in acidic medium is ORANGE
`K_(2)Cr_(2)O_(7)` solution becomes yellow on increasing the PH beyond 7
on PASSING `H_(2)S` through acidified `K_(2)Cr_(2)O_(7)` solution, a milky colour PREFERRED over `K_(2)Cr_(2)O_(7)` in volmetric analysis

Solution :`Na_(2)Cr_(2)O_(7)` is hydrophilic in nature and hence `K_(2)Cr_(2)O_(7)` is more appropriate in volumetric analysis.
Discussion
23297.

Which of the following is an optically active compound ?

Answer»

GLYCINE
Lysine
Isoleucine
ASPARTIC acid

Answer :A
Discussion
23298.

Which of the following shall form an octahedral complex ?

Answer»

`d^(4)` (LOW spin)
`d^(8)` (high spin)
`d^(6)` (low spin)
All of these

Solution :In `d^(6)` (low spin), electrons PAIR up thereby making two empty d-orbitals available for `d^(2)sp^(3)` hybridisation as in the CASE of `[FE(CN)_(6)]^(4-)`
Discussion
23299.

What are sulpha drugs? Give two examples.

Answer»

SOLUTION : A group of drugs which are derivatives of sulphanilamide and are used in PLACE of antibiotics are called sulpha drugs.
EG.: Sulphadizine, Sulphanilamide.
Discussion
23300.

Why are carbohydrates generally optically active ?

Answer»

SOLUTION :Carbohydrates have chiral carbon ATOM and they do not have PLANE of SYMMETRY.
Discussion