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.

9301.

Chemical formula of yellow ammonium sulphide is:

Answer»


ANSWER :B
Discussion
9302.

What is the end product of the following sequence of reactionsAcetamide overset(P_2 O_3)to A overset(4(H))to B.

Answer»

`CH_3 NH_2`
`C_2 H_5 NH_2`
`CH_3 CN`
`CH_3 COONH_4`

ANSWER :B
Discussion
9303.

Which of the following reacts with freeradical ?

Answer»

HYPNOTICS
antipyretics
antibiotics
antioxidant

ANSWER :D
Discussion
9304.

Write short notes on : (a) Fermentation, (b) Enzymes, (c ) Power alcohol, (d) Iodoform test,(e ) Methylated or denatured spirit, (f) Destructive distillation of wood, (g) Absolute alcohol, (h) Rectified spirit, (i) Proof-spirit, (j) Dynamite, (k) Alcoholmetry.

Answer»
Discussion
9305.

Which of the following product is expected to form 13. Pa in the given reaction? (AAK_MCP_36_NEET_CHE_E36_008_Q01)

Answer»


(`AAK_MCP_36_NEET_CHE_E36_008_A01`)

ANSWER :B
Discussion
9306.

Which is known as crystal carbonate?

Answer»

`Na_2CO_3`
`Na_2Co_3.H_2O`
`Na_2CO_3. 10H_2O`
NONE of these

Answer :B
Discussion
9307.

Which one of the following represents Debye-Huckel and Onasager equation?

Answer»

`(Lambda_m^@)_(A_xB_y) = x(lambda_m^@)_(A^y) + y (lambda_m^@)_(B^(x-))`
`Lambda_m = Lambda_m^@ - (A + B Lambda_m^@) sqrt(C )`
`K_a =(ALPHA^2C)/(I - alpha)`
`Lambda_m^@ = LAMBDA - (A + B) Lambda_m^@ - C`

Answer :B
Discussion
9308.

Which of the following is not a property of crystalline solids?

Answer»

Isotropic
Sharp MELTING POINT
Definite geometry
High INTERMOLECULAR forces

Answer :A
Discussion
9309.

Zero order reaction means that the rate of reaction is proportional to _________ of the concentration of reactants.

Answer»

SOLUTION :ZERO POWER
Discussion
9310.

Give reason for the following: Extraction of copper directly from sulphide ores is less favourable than that from its oxide ore through reduction.

Answer»

ELECTROLYSIS
METAL DISPLACEMENT
Smelting
Roasting

Answer :D
Discussion
9311.

Which one of the following is an elastomer?

Answer»

NYLON 6,6
terylene
BUNA - S
bakelite

Solution :buna - S
Discussion
9312.

When fluoride is heated with conc H_2SO_4 and MnO_2 the gas evolved is:

Answer»

`HF`
`F_2`
`SF`
None

Answer :A
Discussion
9313.

Which of the following statements regarding ozone is not correct

Answer»

The OZONE molecule is angular in shape
The ozone is resonance HYBRID of two structures
The oxygen- oxygen BOND length in ozone is identical with that of molecular oxygen
Ozone is used as a germicides and disinfectant for the purification of air

SOLUTION :
The bond length is intermediate between that for a single bond (1.48Å as in `H_(2)O` ) and for a double bond (1.21 Å as in `O_(2)`)
Discussion
9314.

Which of the following is not a natural dye of either vegetable or animal origin?

Answer»

Indigo
Azo dye
Saffron
Tyrain purale

Solution :Azo DYES are not of NATURAL ORIGIN.
Discussion
9315.

What is to be done to determine cell potential ?

Answer»

SOLUTION :(a) Selection of cell potential : The potential of individual half-cell cannot be measured. We can measure only the difference between the two half-cell POTENTIALS that gives the emf of the cell.
If we arbitrarily choose the potential of one electrode (half-cell) than that of the other can be determined with respect to this.
ACCORDING to the convention, a half-cell called standard HYDROGEN electrode is attached wiith ANOTHER half-cell and then cell potential is determining.
(b) Selection of half-cell potential : Half-cell determination is done with the help of standard hydrogen electrode attaching with other half-cell and making complete half-cell.
Standard hydrogen electrode is assigned a zero potential at all temperatures, if inc ell hydrogen electrode is used as anode then the other cell potential is negative.
In this manner, cell potential of any cell can be considered with other half-cell potential.
Discussion
9316.

Which of the following is an optically active compounds ?

Answer»

`CH_3CH_2COOH`
`CH_3CHOHCOOH`
`HOOC CH_2COOH`
`CH_3COCOOH`

ANSWER :B
Discussion
9317.

y' ml of 'y' volume H_(2)O_(2) solution completely reacts with 'x' ml of 'y' M KMnO_(4) solution in acidic medium . The value of x//y is

Answer»

0.036
28
0.057
cannot be calculated

Answer :A
Discussion
9318.

What is the difference between a sol and a gel?

Answer»

SOLUTION :
Discussion
9319.

The sum of IE_(1)and IE_(2), IE_(3) and IE_(4) for element P and Q are given below: {:(,IE_(1)+IE_(2),IE_(3)+IE_(4)),((P),2.45,8.82),((Q),2.85,6.11):} Then according to the given information the correct statement (s) is/are

Answer»

<P>`P^(2+)` is more STABLE than `Q^(2+)`
`P^(2+)` is less stable than `O^(2+)`
`P^(4+)` is more stable than `Q^(4+)`
`P^(4+)` is less stable thann `Q^(4+)`

Answer :A::D
Discussion
9320.

The substance which solid at room temperature forms ionic compounds and reacts with hydrogen forming a hydride the aqueous solution of which is acidic could be

Answer»

AI
Na
`Br_2`
`I_2`

ANSWER :D
Discussion
9321.

When carbon tetrachloride is reduced with Zn and H_(2)SO_(4) alcoholic solution it forms:

Answer»

`CH_(3)CI`
`CHCI_(3)`
`C_(2)H_(5)CI`
`CI_(2)`

SOLUTION :N//A
Discussion
9322.

Which of the following statement regarding ozone is incorrect

Answer»

The ozone molecule is angular in shape
The ozone is RESONANCE structure of TWO structures
The OXYGEN-oxygen bond length in ozone is equal to that of oxygen molecule
Ozone is used as a GERMICIDE and DISINFECTANT for air.

Answer :C
Discussion
9323.

Which of the gven resonance structures is most stable-

Answer»




ANSWER :D
Discussion
9324.

Which is not conjugate pair of acid-base

Answer»

`C_6 G_5 COOH, C_6 H_5 COO^(-)`
`H_3 O^+ , OH^-`
`HONO , NO_2`
`HS^- , S^(2-)`

Answer :B
Discussion
9325.

Write the name and draw the structure of each of the following complex compounds : [Co(NH_(3))_(4)(H_(2)O)_(2)]Cl_(3)

Answer»

SOLUTION :Names and structures of the COMPLEX COMPOUNDS are GIVEN below :
Discussion
9326.

The standard reduction potentials at 298K for the following half reactions are given against each Which is the strongest reducting agent?

Answer»

`Zn(s)`
`CR(s)`
`H_(2)(s)`
`Fe^(2+)(AQ)`

Solution :`Zn` is the strongest REDUCING agent among the given options. The substance having smaller value of reduction potential are better reducing AGENTS.
Discussion
9327.

What happens when ? (Give balanced equations) (i)Sodium iodate is treated with sodium bisulphite solution. (ii)Chlorine is passed through hot and concentrated NaOH solution. (iii)Chlorine is passed into dilute and cold potassium hydroxide solution. (iv)Chlorine gas is bubbled through a solution of ferrous bromide. (v)Iodine reacts with concentrated HNO_(3). (vi)Chlorine is passed over slaked lime. (vii)Potassium iodide is heated with MnO_(2) and concentrated H_(2)SO_(4). (viii)Chlorine reacts with Na_(2)SO_(3) solution. (ix)Iodine is added to acidified stannous chloride solution.

Answer»


ANSWER :(i)`2NaIO_(3)+5NaHSO_(3)to3 NaHSO_(4)+2Na_(2)SO_(4)+H_(2)O+I_(2)`
(ii)`3Cl_(2)+6NaOH("conc")OVERSET("Hot")to5NaCl+NaCIO_(3)+3H_(2)O`
(iii)`Cl_(2)+2KOH(AQ)toKCl+KClO+H_(2)O`
(iv)`2FeBr_(2)+3Cl_(2)to2FeCl_(3)+2Br_(2)`
(v)`I_(2)+10HNO_(3)to2HIO_(3)+10NO_(2)+4H_(2)O`
(vi)`CA(OH)_(2)+Cl_(2)TOCA(OCI)CI+H_(2)O`
(vii)`2KI+MnO_(2)+3H_(2)SO_(4)to2KHSO_(4) + MnSO_(4) + 2H_(2)O + I_(2)`
(viii)`SnCl_(2)+2HCl+I_(2) overset("acidified")to SnCl_(4)+2HI`
Discussion
9328.

Which of the following easily undergo nucleophilic substutition by S_(N^(1)) mechanism in butanol

Answer»

`C_(6)H_(5)CH_(2)Br`
`BrCH_(2)CH=CH_(2)`
`(CH_(3))_(3)CBr`
`(CH_(3))_(3)C CH_(2)Br`

Solution :(a) `C_(6)H_(5).^(+)(C)H_(2)` stabilized by RESONANCE over the PHENYL ring.

stabilized by +I-effect of `CH_(3)` groups
Discussion
9329.

Which of the following complexes follow EAN rule ?

Answer»

`Ni(CO)_(4)`
`[V(CO)_(6)]`
`[FE(CO)_(5)]`
`[Co(NH_(3))_(6)]^(2+)`

SOLUTION :(B) EAN=35
Discussion
9330.

Which of the compound is known as slaked lime?

Answer»

`CAO`
`CaSO_4`
`Ca(OH)_2`
`CaCO_3`

Answer :C
Discussion
9331.

Write the IUPAC names of the following coordination compounds: [CoCl_(2)(en)_(2)]Cl, (b) [Ni(CO)_(4)], c ) [Pt(NH_(3))_(2)Cl(NO_(2))] and d) [Cr(NH_(3))_(6)][Co(CN)_(6)]

Answer»

Solution :a) Dichloridobis(ethane-1,2-diammine)COBALT(III) chloride,
B) TETRACARBONYLNICKEL(0)
c ) Diamminechloridonitrito-N-platinum(II) and
d) Hexaamminechromium(III)hexacyanocobaltate(III)
Discussion
9332.

What is corrosion ? Describe the role of zinc in cathodic protection of iron. Can we use tin in place of zinc for this purpose ? Give reason.

Answer»

Solution :CORROSION is a process in which a metal reacts with SUBSTANCES present in the atmosphere to form compounds at its surface.
Role of zinc : Zn acts as anode. It loses electrons in preference to iron because it is more REACTIVE than FE.
`Zn to Zn^(2+) + 2e^(-)`
If any `Fe^(2+)` ions are FORMED, they gain electrons to form iron back.
`Fe^(2+) + 2e^(-) to Fe`
Tin cannot be used to protect iron because it is lesser reactive than Fe.
Discussion
9333.

The solution of CuSO_4in which copper rod is immersed is diluted to 10 times, the reduction electrode protential :

Answer»

INCREASES by 0.30 V
DECREASES by `0.030V`
Increases by `0.059 V`
Decreases by `0.059V`

ANSWER :B
Discussion
9334.

Which substance is not present in nucleic acid?

Answer»

Cytosine
Adenine
THYMINE
GUANIDINE

ANSWER :D
Discussion
9335.

Which is the correct plot for In k vs 1/T?

Answer»




ANSWER :A
Discussion
9336.

Which of the following statement(s) is/are true about the following compounds?

Answer»

(I) and (III) are identical
(I) and (III) are geometrical diastereomers
(I) and (II) are STRUCTURAL isomers.
(II) and (III) structural isomers.

Solution :I and II have different positions of `PI`-bond, these are POSITIONAL isomers. Similarly II and III are also positional isomers.
I and III are geometrical isomers.
Discussion
9337.

The turbidity of a polymer solution measures:

Answer»

A LIGHT ABSORBED by solution
Light transmitted by the solution
Light SCATTERED by the solution
None of the above

Answer :C
Discussion
9338.

Which of the following statement is incorrect? (a) Cassiterite is not the ore of tin (b) Metallurgy is a process of mixing of ore (c). Concentration of chromite (FeO.Cr_2O_3) is done by magnetic separation (d) ZnS with depressant NaCN from Na_2[Zn(CN)_4].

Answer»

(a) & (B)
Only (a)
(b), C & (d)
C and (d)

ANSWER :A
Discussion
9339.

Which of the following processes represents a gamma-decay only.

Answer»

`.^(A)X_(Z)+gammararr.^(A)X_(Z-1)+a+b`
`.^(A)X_(Z)+.^(1)n_(0)rarr.^(A-3)X_(Z-2)+C`
`.^(A)X_(Z)rarr .^(A)X_(Z)+F`
`.^(A)X_(Z)+e_(-1) rarr .^(A)X_(Z-1)+G`

Answer :c
Discussion
9340.

Which law governs the dissolution of a gas in a liquid ?

Answer»

SOLUTION :Henry.s LAW
Discussion
9341.

The volume strength of the H_(2)O_(2) solution is :

Answer»

`0.556`
`0.448`
`0.896`
`0.632`

SOLUTION :`{:(2H_(2)O_(2),to,2H_(2)O + O_(2)),(68 g,,22.4 " litre at N.T.P."):}`
` :. ` PERCENTAGE of `H_(2)O_(2) " soln " = 0.272 %`
` :. ` STRENGTH of `H_(2)O_(2) " soln " = 0.00272gml^(-1)`
` :.68g H_(2)O_(2) ` give oxygen at N.T.P. = `22400 ` ml
` :. 0.00272`g give oxygen at N.T.P.= `(22400)/68 xx 0.00272 = 0.896` ml .
Discussion
9342.

What is obtained when carboxylic acid is dehydrated with P_(2)O_(5)?

Answer»

SOLUTION :ACID ANHYDRIDE
Discussion
9343.

The term noble gases is referred to which groups of element?

Answer»

13 group
14 group
18 group
12 group

Solution :Group 18 ELEMENTS (ZERO group) are INERT or NOBLE gases.
Discussion
9344.

The value of Henry's constant K_(H)…….

Answer»

greater for gases with HIGHER solubility
hreater for gases with lower solubility
constant for all gases
not related to the solubility of gases

Solution :ACCORDING to Henry's law
`RARR""p propx`
`""p=K_(H)x`
As value of `K_(H)` RISES solubility of gases decreases.
Discussion
9345.

The shape of methyl carbocation is likely to be

Answer»

tetrahedral
pyramidal
planar
linear

Solution :Carbocations are formed by heterolytic bond fission.
`-overset(|) underset(|)C-Z to -overset(|) underset(|)C+Z^(-)`
In `CH_(3)^(+)`, the carbon ATOM is `SP^(2)`- hybridised , so the carbon atom used `sp^(2)` hybrid orbitals to formthree `SIGMA` bonds. A empty p-orbitalis symmetrically above and below the plane of three sigma bonds. This empty p-orbital makes the carbon atom electron-defincient (eelectrophile). The three `sp^(2)` hybrid orbitalsare directed towards the CORNERS of a equilateral triangle. Hence, the shape of `CH_(3)^(+)` is likely to be planar.
Discussion
9346.

Which of the following compounds is not an interpseudo halogen?

Answer»

`Cl_(2)N_(3)`
`BrCN`
two
ICN

Solution :`Cl_(2)N_(3)`is not an interpsoundhalogen.
Discussion
9347.

Write the IUPAC name of the compound given below: CH_(3)- CH_(2)- underset(CH_(3))underset(|)C= underset(CH_(2)OH)underset(|)C-OH

Answer»

Solution :`CH_(3)- CH_(2)- underset(CH_(3))underset(|)C= underset(CH_(2)OH)underset(|)C-OH`
3-Methylpent-2-ene-1, 2-diol
Discussion
9348.

Write the structure of the following N_2O_5

Answer»

SOLUTION :
Discussion
9349.

What is glacial acetic acid? How is it obtained.

Answer»

SOLUTION :Pure acetic acid is called glacial acetic acid. Because it forms ICE like crystal when cooled. When aqueous acetic acid is cooled at 289.5 K, acetic acid solidifies and forms ice like crystals, where as WATER REMAINS in liquid state and removed by FILTRATION. This process is repeated to obtain glacial acetic acid.
Discussion
9350.

Whataretheexpectedproducts of hydrolysis of lactose ?

Answer»


Solution :Sincelactoseis a disaccharide, THEREFORE on hydrolysisit givestow MOLECULES ofmonosaccharides , i.e.,ONE moleculeeach of D - (+) - glucoseand D - (+) - galactose .
`underset("Lactose")(C_(12)H_(22)O_(11))+H_(2)O to underset("or Lactose")OVERSET(H_(3)O^(+))to underset("D- (+)- Glucose")(C_(6)H_(12)O_(6)) + underset("D-(+)-Galactose")(C_(6)H_(2)O_(6))`
Discussion