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.

3451.

Trans-1-2-dimethylcyclobutane

Answer»

SOLUTION :
Discussion
3452.

Which of the following statements are correct? (i) Ethanol mixed with methanol is called denatured alcohol. (ii) Excess of methanol in body may cause blindness. (iii) In the body methanol is oxidised to methanoic acid. (iv) A methanolpoisoned patient is treated by giving intravenous injections of ethanoic acid.

Answer»

(i), (ii) and (III)
(ii) (iii) and (iv)
(i) and (iv)
(i), (iii) and (iv)

Solution :A mathanol poisoned PATIENT is TREATED by giving intravanous injection of ETHANOL.
Discussion
3453.

What are lyophobic colloids? Give one example for them.

Answer»

Solution :Lyophobic colloids are the colloidal solutions in which the particles of the dispersed phase have no affinity for thedispersion medium. The SOLID obtained by their PRECIPITATION cannot be reconverted into colloidal solution by SIMPLY shaking it with the DISPERSION medium. Colloidal solutions of GOLD, silver, `Fe(OH)_3 `and `As_2S_3` are lyophobic.
Discussion
3454.

The solubility of N_(2) in water at 300K and 500 torr partial pressure is 0.01 g L^(-1). The solubility (in g L^(-1)) at 750 torr partial pressure is

Answer»

`0.02`
`0.005`
`0.015`
`0.0075`

ANSWER :C
Discussion
3455.

Which reagent can distinguish butyne-1 and butyne-2 ?

Answer»

`Br_(2)` WATER
alk. `KMnO_(4)`
`Ag^(+)`
alc. KOH

SOLUTION :`CH_(3)CH_(2)C -= CH underset(Ag^(+))overset("Ammoniacal")RARR CH_(3)CH_(2)C -= CAg`
`CH_(3)C -= C CH_(3) underset(Ag^(+))overset("Ammoniacal")rarr "No. ppt."`
Discussion
3456.

The vapour pressure of benzene, toluene and xylene are 75 torr, 22 torr and 10 torr respectively at 20^(@) C. Which of the following is not a possible value of the vapour pressure of an equimolar binary/ternary solution of these at 20^(@) C? Assume, all form ideal solution with each other :

Answer»

`48(1)/(2)`
16
`35(2)/(3)`
`53(1)/(2)`

Answer :D
Discussion
3457.

The two complexes PtCl_(4).2NH_(3) and PtCl_(4). 2KCl do not give precipitates of AgCl when treated with AgNO_(3). The conductance studies indicate zero and three ions per mole of the complex respectively in theirsolutions. The structures of these complexes are :

Answer»

`[Pt(NH_(3))_(2)Cl_(4)],"" K_(2)[PtCl_(6)]`
`[Pt(NH_(3))_(2)]Cl_(4),"" K_(2)[PtCl_(6)]`
`[Pt(NH_(3))_(2)Cl_(2)]Cl_(2), "" [K_(2)PtCl_(4)]Cl_(2)`
`[Pt(NH_(3))_(2)Cl_(4)], ""[K_(2)PtCl_(6)]`.

Answer :A
Discussion
3458.

What is the mass of a photon of sodium light with a wavelength of 5890 Å?[h = 6.626 xx 10^(-34) Js]

Answer»

SOLUTION :`3.75 XX 10^(-36) KG `
Discussion
3459.

Which of the following given list has molecular solids only?

Answer»

Carborundum, dry ice, diamond, solid `H_2`, benzene
Naphthalene, `Na_2 SO_4` COPPER, corundum, `C Cl_4`
Corundum, CAMPHOR, SILICON CARBIDE, ice, solid `CS_2`
Solid `H_2`, camphor, dry ice, `solid CS_2`, naphthalene

Answer :D
Discussion
3460.

Three ions sheets have been coated separately with three metals (A,B and C) whose standard electrode potentials are given below: {:("Metal",A,B,C,"Iron"),(E_("value")^(@),-0.46,-0.66V,-0.20V,-0.44V):} Identify in which case rusting will take place faster when coating is damaged.

Answer»

Solution :Comparing oxidation POTENTIAL of iron with those of metals A,B and C, iron has higher oxidation potential than C only. Hence, when COATING of C is BROKEN, rusting will become FASTER.
Discussion
3461.

The total pressure for volatile components A and B is 0.02 bar at equilibrium. If the mole fractions at component A is 0.2, then, what will be the partial pressure of component B ?

Answer»

0.02 BAR
0.04 bar
0.016 bar
0.2 bar

Solution :`X_(A)+X_(B)=1`
`THEREFORE 0.2+X_(B)=1 "" therefore X_(B)=0.8`
`p_(B)=p.X_(B)=(0.02)(0.8)`
`therefore p_(B)=0.016` bar
Discussion
3462.

Which of the following given moleculues in a pair are paramagnetic and ferrimagnetic substance respectively?

Answer»

`Fe_3 O_4' & 'H_2 O`
`MNO & 'CrO_2`
`Cu^2+` & `ZnFe_2 O_4`
`C_6 H_6' & 'O_2`

ANSWER :C
Discussion
3463.

What are hormones ? Give an example.

Answer»

SOLUTION :Hormones are the PROTEINS secreted by ductless GLANDS which REGULATE growth a nd reproduction in the BODY. They are biochemical messengers
Discussion
3464.

Why can.t molecularity of any reaction be equal to zero?

Answer»

Solution :MOLECULARITY is the NUMBER of MOLECULES taking part in an elementary step.For this we require at least a SINGLE molecule LEADING to the value of minimum molecularity of one.
Discussion
3465.

Which of the following reaction is involved in the Hall's method of purification of bauxite ?

Answer»

`Al_(2)O_(3). 2H_(2)O + 2NaOH to 2NaAlO_(2) + 3H_(2)O`
`Al_(2)O_(3).2H_(2)O + Na_(2)CO_(3) to 2NaAlO_(2) + 2H_(2)O + CO_(2)`
`Al_(2)O_(3). 2H_(2)O + 3C + N_(2) to 2AlN + 3CO + 2H_(2)O`
`2Al_(2)O_(3) + 6F_(2) to 4AlF_(3)+ 3O_(2)`

ANSWER :B
Discussion
3466.

Which of the following have a strong inter- molecular attraction force ?

Answer»

ELASTOMER
THERMOPLASTIC
Fibres
RUBBER

SOLUTION :Thermoplastic
Discussion
3467.

Which of the following amino acids does not correspond to the general formula given below R - CH (NH_(2)) - COOH

Answer»

CYSTEINE 
Proline 
ARGENINE 
Glutamic ACID 

Answer :B
Discussion
3468.

Which of the following mixtures will have the lowest pH at 298 K ?

Answer»

10 mL 0.05N ` CH_(3) COOH + 5 mL 0.1 N NH_(4) OH`
5 mL `0.2 N NH_(4) Cl + 5 mL0.2 N NH_(4) OH`
`5 mL 0.1 N CH_(3) COOH + 10 mL 0.05 N CH_(3) COONa`
`5 mL 0.1 N CH_(3) CO OH + 5 mL 0.1 N NaOH`

Answer :C
Discussion
3469.

When heamatite is burnt in air with coke and lime at 2000^(@)C, steel is produced along with a bi-product 'X'. 'X' is useful as building material. Discuss.

Answer»

SOLUTION :HINT : X is `CaSiO_(3)`
Discussion
3470.

Write the structure of A,B and C in the following: C_(6)H_(5)-CONH_(2) overset(Br_(2)//aq.KOH)to A underset(0.5^(@)C)overset(NaNO_(2)+HCl)toB overset(KI)to C

Answer»

Solution :`UNDERSET("Benzamide")(C_(6)H_(5)-CONH_(2)) underset("HOFMANN bromamide REACTION")overset(Br_(2)//aq.KOH)to underset("Aniline (A)")(C_(6)H_(5)NH_(2)) underset(("Diazotisation")) overset(NaNO_(2)+HCl,0.5^(@)C)to underset("Benzenediaznium (B)")(C_(6)H_(5)-overset(+)(N)-=NCl^(-)) underset(-N_(2)-KCL)overset(Kl)to underset("Iodobenzene (C)")(C_(6)H_(5)-I)`
Discussion
3471.

Which of the followingis notisomer of C_(3)H_(9)N?

Answer»

`(CH_(3))_(3)N`
`(CH_(3))_(2)CHNH_(2)`
`C_(2)H_(5)NHCH_(3)`s
`(CH_(3))_(3)CNH_(2)`

ANSWER :D
Discussion
3472.

The value of cell emf of Mercury button cell is …………… .

Answer»

`1.35 V`
`-0.76 V`
`0.34 V`
`100V`

ANSWER :A
Discussion
3473.

The shape of chromate ion is

Answer»

tetrahedral
square planar
wo TETRAHYDRA linked at one of their APEX
OCTAHEDRAL

Answer :A
Discussion
3474.

The value of equilibrium constant K_p for the reaction CO(g)+H_2O(g) leftrightarrow CO_2(g)+H_2(g)is 1.06 times 10^5at 25^@C Calculate standard free energy change of the reaction at the same temperature.

Answer»

Solution :`DELTAG^@=-2.303RT log_10K_p`
`=-2.303 times 8.314 times 298 times LOG (1.06 times 10^5)`
`=-2.303 times 8.314 times 298 times 5.0253`
`=-2867.3 Joules`
OR=-28.673 K J
Discussion
3475.

Which of the following polymers are condensation polymers ?

Answer»

Bakelite
Teflon
BUTYL RUBBER
MELAMINE FORMALDEHYDE resin

Answer :A::D
Discussion
3476.

Van't Hoff factor i is given the expression ……….

Answer»

`i=("Normal MOLAR MASS")/("ABNORMAL molar mass")`
`i=("Abnormal molar mass")/("Normal molar mass")`
`i=("Observed colligative property")/("CALCULATED colligative property")`
`i=("Calculated colligative property")/("Observed colligative property")`

ANSWER :A::C
Discussion
3477.

Which of the following is globular protein ?

Answer»

Collagen
Heamoglobin
Myosin
Fibroin

Answer :B
Discussion
3478.

What is the basic difference between the electronicof transition and inner transitoin elements?

Answer»

SOLUTION :GENERAL electronic configuration of transition ELEMENTS `=`[Noble gas ] `( n -1) d^(1-10) ns^(1-2)` and for inner transition elements `= ( n -2) f^(1-14) d^(0-1) ns^(0-2)`.THUS, in transition elements, last electron enters d-orbital of penultimate shell while in inner transition elements, it enters f-orbital of ante-penultimate shell.
Discussion
3479.

Which one of the following is the formula of Succinic acid?

Answer»

`HOOC - CH_2-COOH`
`HOOC - (CH_2)_2-COOH`
`HOOC - (CH_2)_4 - COOH`
`HOOC - (CH_2)_3-COOH`

SOLUTION :`HOOC - (CH_2)_2-COOH`
Discussion
3480.

What are pnictogens?

Answer»

Solution :The grops - 15 elements like NITROGEN,phosphorous Arsenic, Antimony and Bismuth are collectively CALLED as pnictogens. Their GENERAL OUTER electronic configuration is `ns^(2)np^(3)`.
Discussion
3481.

Which of the following drugs gives relief from anxiety and stress?

Answer»

Ofloxacin
Aspirin
LUMINAL
Mestranol 

Solution :Luminal
Luminal is a trade name for antianxiety and ANTISTRESS DRUG.
Discussion
3482.

Which among the following elements have half-filled f-orbitals?

Answer»

La
Pm
Gd
Lu

Answer :C
Discussion
3483.

Which of the following substituents has +M effect ?

Answer»

`C-=N`
`CHO`
`NH_(2)`
`NO_(2)`

ANSWER :C
Discussion
3484.

Which of the following presents the correct order of the acidity in the given compounds?

Answer»

`FCH_(2)COOH gt ClCH_(2)COOH gt BrCH_(2)COOH gt CH_(3)COOH`
`CH_(3)COOH gt BrCH_(2)COOHgtClCH_(2)COOH gt FCH_(2)COOH`
`FCH_(2)COOHgtCH_(3)COOH gt BrCH_(2)COOH gt ClCH_(2)COOH`
`BrCH_(2)COOH gt ClCH_(2)COOH gt FCH_(2)COOH gt CH_(3)COOH`

ANSWER :A
Discussion
3485.

What is true about NO and ClO_(2)?

Answer»

Both MOLECULES have fractional bond order
Both oxides are NEUTRAL in nature
Both have odd `e^(-)` bond in their structures
both are PARAMAGNETIC in nature

Answer :A::C::D
Discussion
3486.

Which of the following is an n,p reaction

Answer»

`._(5)C^(13) + ._(1)H^(1) rarr ._(6)C^(14)`
`._(7)N^(14) + ._(1)H^(1) rarr ._(8)O^(15)`
`._(13)A,^(27)+ ._(0)n^(1) rarr ._(12)Mg^(27) + ._(1)H^(1)`
`._(92)U^(235) + ._(0)n^(1) rarr ._(54)Xe^(140) + ._(38)Sr^(93) + 3 ._(0)n^(1)`

Solution :ACCORDING to Beath's notation `._(13)Al^(27) (n,p) ._(12)Mg^(27)`
Discussion
3487.

Write the nernst equation and e.m.f. of the following cells at 298K : Mg_((s))|Mg^(2+)(0.001 M)||Cu^(2+)(0.0001 M)|Cu_((s)) (b)Fe_((s))|Fe^(2+)(0.001 M)||H^(+)(1 M)|H_(2(g))(1"bar")|Pt_((s)) (c) Sn_((s))|Sn^(2+)(0.050 M)||H^(+)(0.020 M)|H_(2(g))(1"bar")|Pt_((s)) (d) Pt_((s))|Br_(2(l))|Br^(-)(0.010 M)||H^(+)(0.030 M)|H_(2(g))(1"bar")|Pt_((s)) Given : E_(OP)^(@)Mg = 2.36 V, E_(OP)^(@)Cu = -0.34 V, E_(OP)^(@)Fe = 0.44 V, E_(OP)^(@)Sn = 0.14 V and E_(OP)^(@)Br_(2) = -1.09V respectively.

Answer»

Solution :`E_(CELL)^(@) = E_(OP_(Mg//Mg^(2+)))^(@)+E_(RP_(CU^(2+)//Cu)) + (0.059)/(2)"log" ([Cu^(2+)])/ ([Mg^(2+)])` <BR> `= 2.36 + 0.34 + (0.059)/(2)"log"(10^(-4))/(10^(-3))`
`= 2.67 V`
(b) `E_(cell)^(@) = E_(OP_(Fe//Fe^(2+)))^(@)+E_(RP_(2H^(+)//H_(2)))^(@) + (0.059)/(2)"log"[H^(+)]^(2)/([P_(H_(2))][Fe^(2+)])`
`= 0.44 + 0 + (0.059)/(2)"log"(1^(2))/((1) XX(0.001))`
`= 0.53 V`
(c) `E_(cell)^(@) = E_(OP_(Sn//Sn^(2+)))^(@)+E_(RP_(2H^(+)//H))^(@) + (0.059)/(2)"log"[H^(+)]^(2)/((P_(H_(2)))xx[Sn^(2+)])`
`= 0.44 + 0 + (0.059)/(2)"log"((0.02)^(2))/((1) xx(0.05))`
`= 0.08 V`
(d)`E_(cell)^(@) = E_(OP_(Br_(2)//Br^(-)))^(@)+E_(RP_(2H^(+)//H_(2)))^(@) + (0.059)/(2)"log"[H^(+)]^(2)/((P_(H_(2)))xx[Br^(-)]^(2))`
`= -1.09 + 0 + (0.059)/(2)"log"((0.03)^(2))/((1) xx(0.01)^(2))`
`= -1.06 V`
Discussion
3488.

Which is formed , when benzonitrile is hydrolysed by dil. HCl ?

Answer»

BENZOIC ACID
BENZALDEHYDE
BENZAMIDE
Benzoic unhydride

ANSWER :A
Discussion
3489.

Which of the following is transition element

Answer»

Pb
Sn
Cr
Zn

Answer :C
Discussion
3490.

Whenpropionicacidis treatedwithaqueous NaHCO_(3)CO_(2)is liberated. The carbonatom of CO_(2)comesfrom .

Answer»

METHYL GROUP
carboxylic ACID
methylene group
BICARBONATES

Answer :D
Discussion
3491.

What type of stoichiometric defect is shown by ZnS ?

Answer»

SOLUTION :FRENKEL DEFECT
Discussion
3492.

Two reactions, (I)Ararr Product & (II) BrarrProducts follow first order kinetics. The rate reaction-(l) is doubled when the temperature is raised from 300K to 310K. The half-life for this reaction at 310K is 30min. At the same temperature B decompose twice as fast asA. If the energy of activation for reaction- (I)is twice that of reaction-(II) calculate the rate constant of reaction- (II) at 300K.

Answer»

Solution :For a FIRST reaction , RATE constant (k) = `(0.693)/("half-life")`
and `k_(1_((310)))=(0.693)/(30)=0.0231"min"^(-1)`
But `(k_(1_((310))))/(k_(1_((300))))=2 ` (given)
We know, `log((k_(2))/(k_(1)))=(E_(a))/(2.303R)[(1)/(T_(1))-(1)/T_(2)]""[1]`
`THEREFORE`For reaction (I),`log.(k_(1_(310)))/(k_(1_(300)))=(E_(a_(1)))/(2.303R)[(1)/(300)-(1)/(310)]`
`therefore`For reaction (I),`log.(k_(1_((310))))/(k_(1_((300))))=(E_(a_(1)))/(2.303R)[(1)/(300)-(1)/(310)]`
For reaction [II] ,`log.(k_(2_((310))))/(k_(2_((1)(300))))=(E_(a_(1)))/(2.303R)[(1)/(300)-(1)/(310)]`
` ""[because E_(a_(2))=E_(a_(1))//2]`
`thereforelog.(k_(2_((310))))/(k_(2_((300))))=((1)/(2)E_(a_(1)))/(2.303R)[(1)/(300)-(1)/(310)]=log{(k_(1_(310)))/(k_(1_(300)))}^(1//2)`
`k_(2(310))/k_(2(300))={k_(1_(310))/k_(1_(300))}^(1//2)=SQRT(2)=1.414`
We have , `k_(1_(310))=0.0231"min"^(-1)`
`thereforek_(2_(310))=2k_(1_(310))("given")=2xx0.0231=0.0462"min"^(-1)`
But, `(k_(2_((310))))/(k_(2_((300))))=1.414 thereforek_(2_(300))=(0.0462)/(1.414)=0.03267"min"^(-1)`
Discussion
3493.

Which of the following is a steriod hormone ?

Answer»

PROGESTERONE
INSULIN
Thryoxine
OXYTOCIN

ANSWER :A
Discussion
3494.

Which of the following polymers have vinylic monomer units

Answer»

ACRILAN
Nylon
Polystyrene
Neoprene

SOLUTION :Arcilan- Monomer is `H_(2)C=CHCN`
Nylon - Monomer is ` COOH(CH_(2))_(4)COOH+NH_(2)(CH_(2))_(6)NH_(2)`
Polystyrene- Monomer is
Neoprene - Monomer is `H_(2)C=overset(CL)overset(|)C-CH=CH_(2)`
Discussion
3495.

Which of following isomers of [M(NH_(3))_(2)Cl_(2)]would react with silver oxalate (Ag_(2)C_(2)O_(4)) :-

Answer»



Both
NONE

SOLUTION :
Discussion
3496.

Two platinum electrodes were immersed in a solution of cupric and electriccurrent passed through the solution. After some tiem it was found that the colour of copper sulphate disappeared with evolution of gas at the electrode. The colurless solution corttains :

Answer»

PLATINUM sulphate
Copper hydroxide
Copper sulphate
Sulphuric acid

Answer :D
Discussion
3497.

Which of the following colloidal systems does correctly represent fog ?

Answer»

GAS DISPERSED in a liquid
Gas dispersed in a gas
Solid dispersed in a gas
Liquid dispersed in a gas

Answer :D
Discussion
3498.

What will be the product formed when ethanal is treated with 2 equivalent of methanol?

Answer»

1, 1 - dimethoxy methane
1, 2 - dimethoxy ETHANE
1, 1 - dimethoxy ethane
1, 1 - diethoxy ethane

Solution :1, 1 - dimethoxy ethane
Discussion
3499.

Which of the following molecules, in pure from , is unstable at room temperature

Answer»




SOLUTION :
Discussion
3500.

x g of a nonelectrolytic compound (molar mass = 200) are dissolved in 1.0 L of0.05 M NaCl aqueous solution. The osmotic pressure of this solution is found to be 4.92 atm at 27^@C . Calculate the value of x. Assume complete dissociation of NaCl and ideal behaviour of this solution.

Answer»

SOLUTION :`OP = ((X)/(200)+ 2 xx 0.05) xx 0.0821 xx 300`
19.9g
Discussion