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.

15601.

When H_(2) is added to an equilibrium mixture 2HI(g)hArrH_(2(g)) + I_(2(g)), at constant temperature, the -

Answer»

<P>VALUE of `K_(p)` decreases
Value of `K_(p)` increases
The degree of DISSOCIATION of HI decreases
Degree of dissociation of HI increases

Answer :C
Discussion
15602.

The reagent which oxidise aldehyde and ketone is

Answer»

Tollen's reagent
FEHLING's solution
SCHIFF's reagent
`K_(2)Cr_(2)O_(7) + H_(2)SO_(4)`

Answer :D
Discussion
15603.

Which of the following is an incorrect combination of curves in column 1.

Answer»

<P>(II)(III)(Q)
(I)(i)(P)
(I)(iii)(S)
(I)(ii)(Q)

SOLUTION :NA
Discussion
15604.

What of the following is not correct for D_(2)O?

Answer»

Boiling POINT is higher than `H_(2)O`
SOLUBILITY of NaCl in it is more than `H_(2)O`
`D_(2)O`reacts faster than `H_(2)O`
VISCOSITY is higher than `H_(2)O` at `25^(@)` C

Solution :Solubility of `NaCl` in `H_(2)O` is more. `H_(2)O` reacts faster than `D_(2)O`.
Discussion
15605.

The weight of water in 1 litre of 2 M NaCl solution of density 1.117 g//mL is

Answer»

1117g
1000g
117g
883g

Answer :B
Discussion
15606.

Which of the following compounds will give iodoform test ?

Answer»

`CH_(3)-overset(O)overset(||)(C)-H`
`CH_(3)-overset(O)overset(||)(C)-CH_(3)`
`CH_(3)-overset(O)overset(||)(C)-Cl`
`CH_(3)-overset(O)overset(||)(C)-NH_(2)`

ANSWER :A::B
Discussion
15607.

When HCI gas is passed through propene in the presence of benzoyl peroxide,it gives :

Answer»

n-propyl chloride
2-chloropropane
Allyl chloride
No reaction

Answer :B
Discussion
15608.

What are the electrophiles in Freidel Craft reaction ?

Answer»


ANSWER :`R+,CH_3^+,Ch_3CH_2^+`, ETC.
Discussion
15609.

Which of the following acts as neutral refractories ?

Answer»

MAGNESITE 
Dolomite 
Quartz 
Chromite 

Solution :Chromite is NEUTRAL REFRACTORY MATERIAL.
Discussion
15610.

When 0.5g of sulphur is burnt to SO_(2), 4, 6 kJ of heat is liberated. What is the enthalpy of formation of sulphur dioxide

Answer»

`+ 147.2 kJ`
`- 147.2 kJ`
`- 294.4 kJ`
`+ 294.4 kJ`

Solution :`S+O_(2)rarrSO_(2), DeltaH_(F)=-4.6 kJ`
`because` 0.5 GM of sulphur on burning produce 1 gm of `SO_(2)`
`THEREFORE` 32 gm of sulphur on burning produce 64 gm of `SO_(2)`
`therefore DeltaH=(-4.6 kJ)xx64=-294.4 kJ`
Discussion
15611.

Give the sequence of reactions to convert benzene into p-hydroxyacetophenone.

Answer»

Nitration FOLLOWED by treatment with `Cl_2` in presence of LIGHT
Nitration followed by treatment with `Cl_2//A//Cl_3`
Chlorination with ` Cl_2//A//Cl_3` FOLLOWEDBY nitration.
Chlorination with `Cl_2//h DELTA ` followed by nitration.

Answer :C
Discussion
15612.

The role of a catalyst is to change ………………… .

Answer»

GIBBS energy of REACTION
ENTHALPY of reaction
activation energy of reaction
equilibrium constant

Solution :In the PRESENCE of catalyst, activation energy barrier is lowered.
Discussion
15613.

Which of the following is employed as Anthistamine ?

Answer»

Chloramphenicol
Diphenylhydramine
Norothindrone
Omepyrazole

Answer :B
Discussion
15614.

Which nitrogen base is present in RNA but not present in DNA ?

Answer»

URACIL
Thymine
Cytosine
Adenine

SOLUTION :Uracil
Discussion
15615.

What will be the osmotic pressure of 5% W/V sugar solution of 150^(@)C temperature ?

Answer»

5.07 ATMOSPHERE
5.70 atmosphere
7.5 atmosphere
3.55 atmosphere

SOLUTION :`PI=(5xx0.082xx423)/(342xx0.1)=5.07` ATM.
Discussion
15616.

Which of the following order of CFSE is incorrect?

Answer»

`[Cr(NO_(2))_(6)]^(3-) gt [Cr(NH_(3))_(6)]^(3+) gt [Cr(H_(2)O)_(6)]^(3+)`
`[PtF_(4)]^(2-) gt [PdF_(4)]^(2-) gt [NiF_(4)]^(2-)`
`[Ni(DMG)_(2)] lt [Ni(E n)_(2)]^(2+)`
`[Co(EDTA)]^(-) gt [Co(e n)_(3)]^(3+)`

Answer :C
Discussion
15617.

Which of the following does not under go HVZ reaction ?

Answer»

`CH_(3) - COOH`
`CH_(3) - CH_(2) - COOH`
`CH_(3) - OVERSET(CH_(3)) overset(|) (CH) - COOH`
`(CH_(3))_(3) - C - COOH`

ANSWER :D
Discussion
15618.

Which polyhalogen compound is used as a fire extinguisher in case of fire caused by oils, fats etc.?

Answer»

`CHCl_(3)`
`CH_(3)Cl_(2)`
`CHI_(3)`
`C Cl_(4)`

ANSWER :D
Discussion
15619.

Which of the following is the most impure form of iron ?

Answer»

BESSEMER IRON
Steel
Pig iron
Wrought iron

ANSWER :C
Discussion
15620.

The voltage of the cell Zn(s)|Zn(CN)_(4)^(2-) (0.450M),CN^(-) (2.65 xx 10^(-3)M)||Zn^(2+)(3.84 xx 10^(-4)M)|Zn(s) is E =+0.099V. Calculate the constant K_(f) for Zn^(2+) +4CN^(-) rarr Zn(CN)_(4)^(2-), the only Zn^(2+) +CN^(-) complex reaction of importance,

Answer»


ANSWER :`5.4 XX 10^(16)`
Discussion
15621.

Zn and Cd do not show variable valency, because:

Answer»

They have only two electrons in OUTERMOST subshells
Their d-subshells are complete
They are RELATIVELY SOFT metals

Answer :B
Discussion
15622.

Which of the following is correct is exple of liquid dishwashing detergent ?

Answer»

`CH_3(CH_2)_10 - CH_2OSO_3^(-) - Na^(+)`


Solution :Non-ionic DETERGENTS are USED as liquid dish washing detergents.
Discussion
15623.

The sugar part of DNA is :

Answer»

Glucose
Sorbose
Ribose
Deoxyribose

Answer :D
Discussion
15624.

Which of the following form dimeric halides

Answer»

AL
Mg
In
GA

Solution :`Al_(2)Cl_(6),In_(2)Cl_(6),Ga_(2)Cl_(6)`
Discussion
15625.

Vapour phase nitration of propaneporduces howmany products.

Answer»

1
2
3
4

Answer :D
Discussion
15626.

Which of the following is correct

Answer»




ANSWER :A
Discussion
15627.

Using VBT, explain the geometry and magnetic property of [CO(NH_(3))_(6)]^(+3).

Answer»

SOLUTION :
Discussion
15628.

There are two solutions of AgI having equal volume on mixing excess KI inAgNO​_(3) and other on mixing excess AgNO_(​3) in KI are formed. When both solutionsare mixed then correct statement is:-

Answer»

Both sol stabilizes each other
First sol contains more charge
Both sol COAGULATES each other
Both sol FORMS TRUE SOLUTION

Answer :C
Discussion
15629.

Two gases A and B , having the mole ratio of 3:5 in a container, exert a pressure of 8 atm. If A is removed , what would be the pressure due to B only, temperature remaining constant:

Answer»

1 atm
2 atm
4 atm
5 atm

Answer :D
Discussion
15630.

Which among the following oxides of lead is strong oxidizing agent? PbO,PbO_(2) ,Pb_(3)O_(4)

Answer»

SOLUTION : `PbO_(2)`
Discussion
15631.

Which of the followig expressions correctly represents the equivalent conductance at infinite dilution of Al_(2)(SO_(4))_(3). Given that wedge_(Al3+)^(0) and wedge_(SO_(4)^(2-))^(0) ar the equivalent conductances at infinite dilution of the respective ions

Answer»

`2wedge_(AL^(3+))^(0)+3wedge_(SO_(4)^(2-))^(0)`
`wedge_(Al^(3+))^(0)+wedge_(SO_(4)^(2-))^(0)`
`(wedge_(Al^(3+))^(0)+wedge_(SO_(4)^(2-))^(0))xx6`
`(1^(WEDGE^(o)))/(3)Al^(3+)+(1wedge^(o)))/(2)SO_(4)^(2-)`

Solution :As EQUIVALENT conductance are given for ions.
Discussion
15632.

What type of hybridisation is involved in [Fe(CN)_6]^(3-) ?

Answer»

`d^2sp^3`
`dsp^2`
`sp^3d^2`
`dsp^3`

ANSWER :A
Discussion
15633.

Veronal and luminal are derivatives at barbituric acid which are : (a) Tranquilizers (b) Non-narcotic analgesic (c ) Antiallergic drugs (d) Neurologically active drugs

Answer»

a,d
a,b
a,C
b,c

ANSWER :A
Discussion
15634.

Which among triglyceride the following contains ?

Answer»

WAX
COOKING OIL
ESSENTIAL oil
Albumin

Solution :Cooking oil
Discussion
15635.

Which reagent is used to distinguish between primary, secondary and tertiary amines ?

Answer»


ANSWER :Hinsberg's REAGENT
Discussion
15636.

Under certain conditions 6.7 mL of sulphur dioxide diffuse in 5.5 minutes. Under the same conditions 66.8 Ml of another gas diffuse in 4 minutes. Calculate the molecular weight of the other gas if that of sulphur dioxide is 64.

Answer»


ANSWER :34.06
Discussion
15637.

Which one of the following is 550 times sweeter than sugar ?

Answer»

Alitame
Saccharin
Aspartame
Sucrolose

Answer :B
Discussion
15638.

Which of the following overlaping of atomic orbital will not be allowed ?(i) 2P_x + 2P_z (ii) 2P_x - 2P_x (iii) 2s + 2s

Answer»

SOLUTION :`2P_x + 2P_z`
Discussion
15639.

The solution of nickel sulphate in which nickel rod is dipped is diluted 10 times. The potential of nickel

Answer»

decreases by 60 MV
INCREASES by 30V
decreases by 30 mV
decreases by 60V

Answer :C
Discussion
15640.

Which among the following elements is radioactive?

Answer»

Pm
La
Tm
Pr

Solution :Only PROMETHIUM is RADIOACTIVE in LANTHANOIDS
Discussion
15641.

Which one of the following complex is paramagnetic in nature ?

Answer»

`[Fe(CN)_(4)]^(4-)`
`[NI(CO)_(4)]`
`[Fe(CN)_(4)]^(3-)`
`[Ag(CN)_(2)]^(-)`

ANSWER :C::D
Discussion
15642.

Which has maximum tendency to form recemateon alkaline hydrolysis ?

Answer»

1-bromo-1-phenyl ethane
n-propyl CHLORIDE
Isopropyl chloride
Neo pentyl BROMIDE

Solution :Molecule CONTAINING ASYMMETRIC carbon atom.
Discussion
15643.

What is meant by Gold number of starch is 10-15?

Answer»

Solution :GOLD number 10-15 means that 10-15 MG of LYOPHILIC colloid are sufficient to just prevent the precipitation of 10 mL of a gold SOL on the ADDITION of ten par cent of sodium chloride solution.
Discussion
15644.

When a mixture of air and steam is passed over red hot coke, the outcoming gas contains :

Answer»

PRODUCER gas
Water gas
Coal gas
None of these

Answer :D
Discussion
15645.

Which of the following will have least hindered rotation abou carbon -carbon bond?

Answer»

ETHANE
ETHYLENE
Acetylene
Hexachloroethane

Answer :A
Discussion
15646.

Which conformation of Bicyclo [2, 2, 2]-octane is more stable?

Answer»

Chair
Half Boat
Boat
Twisted boat

Solution :
Discussion
15647.

Why alkyl halides are not generally prepared in laboratory by free radical halogenation of alkanes?

Answer»

Solution :For the PREPARATION of ALKYL halides in the laboratory, free radical HALOGENATION of alkanes is not a suitable method since it results in the formation of many ISOMERIC monosubstituted products through substitution of different KINDS of hydrogen atoms. Moreover, poly halogenation may also take place.
Discussion
15648.

Which one of the following elements corrodes rapidly ?

Answer»

Aluminium
Iron
Zinc
Silver

SOLUTION :The law is named after AMEDEO Avogadro who , in 1811 , hypothesized that who given samples of an ideal gas , of the same VOLUME and at the same TEMPERATURE and pressure , contain the same number of molecules .
Discussion
15649.

Write the names of two ores of copper.

Answer»

Solution :MAIN ORES of copper are,
i.Copper PYRITES-`CuFeS_(2)` ii.Copper GLANCE-`Cu_(2)S`iii.Malachite-`CuCO-(3),CU(OH)_(2)`
Discussion
15650.

Which of these is a shape selective catalyst?

Answer»

ZSM-5
ZUV-2
PSP-3
YOI-3

Answer :A
Discussion