46295 + Interview Questions in Chemistry

1.	If the energy of the electron in hydrogen atom in a certain excited state is −3.4 eV, then what will be its angular momentum?
Answer» If the energy of the electron in hydrogen atom in a certain excited state is $- 3.4 e V$ , then what will be its angular momentum?

Discussion

2.	Why do D-Block elements have greater horizontal similarities in contrast to main group elements?
Answer» Why do D-Block elements have greater horizontal similarities in contrast to main group elements?

Discussion

3.	Thermodynamically the most stable form of carbon is (a) diamond (b) graphite (c) fullerenes (d) coal
Answer» Thermodynamically the most stable form of carbon is (a) diamond (b) graphite (c) fullerenes (d) coal

Discussion

4.	The decreasing order of the rate of dehydration for the above compounds is:
Answer» The decreasing order of the rate of dehydration for the above compounds is:

Discussion

5.	25 mL of household solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In the titration of the liberated iodine, 48 mL of 0.25 N Na2S2O3 was used to reach the end point. The molarity of the household bleach solution is
Answer» 25 mL of household solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In the titration of the liberated iodine, 48 mL of 0.25 N $N a_{2} S_{2} O_{3}$ was used to reach the end point. The molarity of the household bleach solution is

Discussion

6.	NaCl + H2O= HCl + NaOH Can we use this reaction to prepare Con. HCl ?
Answer» NaCl + H₂O= HCl + NaOH Can we use this reaction to prepare Con. HCl ?

6.

NaCl + H2O= HCl + NaOH Can we use this reaction to prepare Con. HCl ?

Answer»

NaCl + H₂O= HCl + NaOH

Can we use this reaction to prepare Con. HCl ?

Discussion

7.	In the given reaction major product 'X' will be:
Answer» In the given reaction major product 'X' will be:

Discussion

8.	Two elementsXY2 X atomic weight 75 and Y atomic weight 16 combine to give compound having 75.8% of X. The formula of the compound is
Answer» Two elements ${XY}_{2}$ X atomic weight 75 and Y atomic weight 16 combine to give compound having 75.8% of X. The formula of the compound is

Discussion

9.	Determine the solubility of Ag2 SO4 . Calculate molarities of individual ions and also the solubilities of salts in gL-1. (KSp = 1.4 x 10-5) BOOK SOLUTION Ksp = [Ag+]2 [SO42-] = (2S)2 (S) = 22 x 1 x S3 M3 = 4S3M3 (I) S = 1.52 x 10-2 mol L-1 MY PROBLEM In my book in theory portion it is given a headline as ' RELATION BETWEEN KSP AND MOLAR SOLUBILITY OF A SPARINGLY SOLUBLE SALT' Type of Salt : MxXy Relation : Ksp = xx yy.(S)x+y If we apply this rule to above problem then we will get 22 x 44(S)2+4 Ksp = 1024(S)6 See, this 'book rule' is working on every problem except this case. NOTE: I am understanding book Solution but I want to know that when I am using the rule why it is not making correct sense.
Answer» Determine the solubility of Ag₂SO₄. Calculate molarities of individual ions and also the solubilities of salts in gL^-1. (K_Sp = 1.4 x 10^-5) BOOK SOLUTION K_sp= [Ag⁺]²[SO₄^2-] = (2S)²(S) = 2² x 1 x S³ M³ = 4S³M³ (I) S = 1.52 x 10^-2mol L^-1 MY PROBLEM In my book in theory portion it is given a headline as ' RELATION BETWEEN K_SPAND MOLAR SOLUBILITY OF A SPARINGLY SOLUBLE SALT' Type of Salt : M_xX_y Relation : K_sp= x^xy^y.(S)^x+y If we apply this rule to above problem then we will get 2²x 4⁴(S)²⁺⁴ K_sp = 1024(S)⁶See, this 'book rule' is working on every problem except this case. NOTE: I am understanding book Solution but I want to know that when I am using the rule why it is not making correct sense.

Discussion

10.	At high temperatures, nitrogen directly combines with:
Answer» At high temperatures, nitrogen directly combines with:

Discussion

11.	Which of the following conversions is known as Stephen’s reduction?
Answer» Which of the following conversions is known as Stephen’s reduction?

Discussion

12.	When a bottle of cold drink is opened, the gas comes out with a fizze due to -
Answer» When a bottle of cold drink is opened, the gas comes out with a fizze due to -

Discussion

13.	Which of the following configuration follows Hund's rule:
Answer» Which of the following configuration follows Hund's rule:

Discussion

14.	Addition of HCl to propene in presence of peroxides gives
Answer» Addition of HCl to propene in presence of peroxides gives

Discussion

15.	Inert pair effect occurs due to non participation of electron in which bonding orbital?
Answer» Inert pair effect occurs due to non participation of electron in which bonding orbital?

Discussion

16.	If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be
Answer» If molality of the dilute solution is doubled, the value of molal depression constant $(K_{f})$ will be

Discussion

17.	A compound mistakenly named 3,4-dimethylbutane should be named correctly as:
Answer» A compound mistakenly named 3,4-dimethylbutane should be named correctly as:

Discussion

18.	The complex [Pt(Py)(NH3)BrCl] will have how many geometrical isomers?
Answer» The complex $[P t (P y) (N H_{3}) B r C l]$ will have how many geometrical isomers?

Discussion

19.	Which of the following is not a resonating structure of each other?
Answer» Which of the following is not a resonating structure of each other?

Discussion

20.	Hydrogen ion concentration in mol/L in a solution of pH 5.4 will be
Answer» Hydrogen ion concentration in mol/L in a solution of pH 5.4 will be

20.

Hydrogen ion concentration in mol/L in a solution of pH 5.4 will be

Answer»

Hydrogen ion concentration in mol/L in a solution of pH 5.4 will be

Discussion

21.	Which of the following order is correct?
Answer» Which of the following order is correct?

Discussion

22.	Whenever a reaction between an oxidising agent and a reducing agent is carried out, a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess. Justify this statement giving three illustrations.
Answer» Whenever a reaction between an oxidising agent and a reducing agent is carried out, a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess. Justify this statement giving three illustrations.

Discussion

23.	Oxidation state of Cr in K2Cr2O7 is
Answer» Oxidation state of $C r$ in $K_{2} C r_{2} O_{7}$ is

Discussion

24.	Which of the following statement is correct?
Answer» Which of the following statement is correct?

Discussion

25.	What is common for H+, D+ and T+
Answer» What is common for H+, D+ and T+

Discussion

26.	Which bond angle θwould result in the maximum dipole moment for the triatomic molecule YXY
Answer» Which bond angle θwould result in the maximum dipole moment for the triatomic molecule YXY

26.

Which bond angle θwould result in the maximum dipole moment for the triatomic molecule YXY

Answer»

Which bond angle θwould result in the maximum dipole moment for the triatomic molecule YXY

Discussion

27.	Reaction of toluene with I-Cl in presence of AlCl3 in cold and dark gives
Answer» Reaction of toluene with I-Cl in presence of $A l C l_{3}$ in cold and dark gives

Discussion

28.	Which of the following is/are hard water(s)?
Answer» Which of the following is/are hard water(s)?

Discussion

29.	Which of the following reaction is incorrect?
Answer» Which of the following reaction is incorrect?

Discussion

30.	Which one of the following sets forms the biodegradable polymer ?
Answer» Which one of the following sets forms the biodegradable polymer ?

30.

Which one of the following sets forms the biodegradable polymer ?

Answer»

Which one of the following sets forms the biodegradable polymer ?

Discussion

31.	The raw material used in Nylon-6 is
Answer» The raw material used in Nylon-6 is

Discussion

32.	Find the strongest acid among the following compounds.
Answer» Find the strongest acid among the following compounds.

Discussion

33.	If the radius of Fe2+ is 0.76∘A, the radius of Fe3+ is
Answer» If the radius of $F e^{2 +}$ is $0.76 \circ A$ , the radius of $F e^{3 +}$ is

Discussion

34.	Arrange the following compounds in order of increasing reactivity towards nucleophilic substitution.
Answer» Arrange the following compounds in order of increasing reactivity towards nucleophilic substitution.

34.

Arrange the following compounds in order of increasing reactivity towards nucleophilic substitution.

Answer»

Arrange the following compounds in order of increasing reactivity towards nucleophilic substitution.

Discussion

35.	9.5×10−3% MgCl2 and 1.36×10−4% CaSO4 are present in water. What is the measured hardness of water in terms of CaCO3? (Given : molar mass of MgCl2 and CaSO4 are 95 and 136 g/mol respectively. )
Answer» $9.5 \times 10^{- 3} % M g C l_{2}$ and $1.36 \times 10^{- 4} % C a S O_{4}$ are present in water. What is the measured hardness of water in terms of $C a C O_{3}$ ? (Given : molar mass of $M g C l_{2} a n d C a S O_{4}$ are 95 and 136 g/mol respectively. )

Discussion

36.	Which is the correct statement for the given acids? H3PO2 and H3PO3
Answer» Which is the correct statement for the given acids? $H_{3} P O_{2}$ and $H_{3} P O_{3}$

36.

Which is the correct statement for the given acids? H3PO2 and H3PO3

Answer»

Which is the correct statement for the given acids?

$H_{3} P O_{2}$ and $H_{3} P O_{3}$

Discussion

37.	Alveoli are tiny sacs in the lungs whose average diameter is 5×10−10 m. Consider an oxygen molecule (5.3×10−26 kg) trapped within an alveolus. Calculate the uncertainty in the velocity of the oxygen molecule.
Answer» Alveoli are tiny sacs in the lungs whose average diameter is $5 \times 10^{- 10} m$ . Consider an oxygen molecule $(5.3 \times 10^{- 26} k g)$ trapped within an alveolus. Calculate the uncertainty in the velocity of the oxygen molecule.

Discussion

38.	Match the class of drugs given in Column I with their functions given in Column II Column IColum IIA. Analgesics1. Inhibit the growth of microorganisms can be given orallyB. Antiseptics2. Treatment of stressC. Antithistamines3. Applied to inanimate objectsD. Antacids4. Prevents the interaction of histamine with its receptorE. Tranquilizers5. Pain killing effectF. Antibiotics6. Applied to diseased skin surfacesG. Disinfectants7. Treatment of acidity
Answer» Match the class of drugs given in Column I with their functions given in Column II $\begin{matrix} Column I & Colum II A. Analgesics & 1. Inhibit the growth of microorganisms can be given orally B. Antiseptics & 2. Treatment of stress C. Antithistamines & 3. Applied to inanimate objects D. Antacids & 4. Prevents the interaction of histamine with its receptor E. Tranquilizers & 5. Pain killing effect F. Antibiotics & 6. Applied to diseased skin surfaces G. Disinfectants & 7. Treatment of acidity \end{matrix}$

Discussion

39.	On electrolysis of Brine solution, is produced at anode and , at cathode.
Answer» On electrolysis of Brine solution, is produced at anode and , at cathode.

Discussion

40.	Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously? (a) Li (b) Na (c) K (d) Cs
Answer» Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously? (a) Li (b) Na (c) K (d) Cs

Discussion

41.	The solubility in water of a sparingly soluble salt PbBr2 is 6.6×10−6 mol L−1. What is the concentration of Br−(aq) in a saturated solution of PbBr2(s)? (1.65)13=1.18
Answer» The solubility in water of a sparingly soluble salt $P b B r_{2}$ is $6.6 \times 10^{- 6}$ mol $L^{- 1}$ . What is the concentration of $B r^{-} (a q)$ in a saturated solution of $P b B r_{2} (s)$ ? $(1.65)^{\frac{1}{3}} = 1.18$

Discussion

42.	Consider a weak electrolyte, AB3 having a concentration of 0.1 M in solution. If the degree of dissociation is 0.2, Calculate the ionisation constant Ki of AB3.
Answer» Consider a weak electrolyte, $A B_{3}$ having a concentration of 0.1 M in solution. If the degree of dissociation is 0.2, Calculate the ionisation constant $K_{i}$ of $A B_{3}$ .

Discussion

43.	An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu and 8.82% abundance with 21.99 amu. Calculate the average atomic mass of this element.
Answer» An element has the following natural abundances and isotopic masses: 90.92% abundance with $19.99 amu$ , 0.26% abundance with $20.99 amu$ and 8.82% abundance with $21.99 amu$ . Calculate the average atomic mass of this element.

Discussion

44.	How many mol of potassium chlorate is to be heated to produce 5.6 litres of oxygen at 0 ∘C and 1 atm?
Answer» How many mol of potassium chlorate is to be heated to produce 5.6 litres of oxygen at $0^{\circ} C$ and 1 atm?

Discussion

45.	Which of the following options are correct for solubility and solubility product of CO2[Fe(CN)6] in water at 25∘. Conductivity of a saturated solution of CO2[Fe(CN)6] is 2.06×10−6 Ω−1 cm−1 and that of water used is 4.1×10−7 Ω−1cm−1. The ionic molar conductivities of Co2+ and Fe(CN)4−6 are 86.0 Ω−1cm2mol−1and 444.0 Ω−1cm2mol−1, respectively.
Answer» Which of the following options are correct for solubility and solubility product of $C O_{2} [F e {(C N)}_{6}]$ in water at $25^{\circ}$ . Conductivity of a saturated solution of $C O_{2} [F e {(C N)}_{6}]$ is $2.06 \times 10^{- 6} Ω^{- 1} {cm}^{- 1}$ and that of water used is $4.1 \times 10^{- 7} Ω^{- 1} {cm}^{- 1} .$ The ionic molar conductivities of $C o^{2 +} and F e (C N)_{6}^{4 -}$ are $86.0 Ω^{- 1} {cm}^{2} {mol}^{- 1} and 444.0 Ω^{- 1} {cm}^{2} {mol}^{- 1},$ respectively.

Discussion

46.	Which of the following statements are correct? I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explained II) With increase of energy of electron in an atom, the ionisation potential value of that atom increase III) For multivalent atoms, electronegativity can be explained with the help of Mulliken scale IV) Highest electronegative element is fluorine
Answer» Which of the following statements are correct? I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explained II) With increase of energy of electron in an atom, the ionisation potential value of that atom increase III) For multivalent atoms, electronegativity can be explained with the help of Mulliken scale IV) Highest electronegative element is fluorine

46.

Which of the following statements are correct? I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explained II) With increase of energy of electron in an atom, the ionisation potential value of that atom increase III) For multivalent atoms, electronegativity can be explained with the help of Mulliken scale IV) Highest electronegative element is fluorine

Answer»

Which of the following statements are correct?

I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explained

II) With increase of energy of electron in an atom, the ionisation potential value of that atom increase

III) For multivalent atoms, electronegativity can be explained with the help of Mulliken scale

IV) Highest electronegative element is fluorine

Discussion

47.	The nitrogen base found only in DNA is also called
Answer» The nitrogen base found only in DNA is also called

Discussion

48.	Which of the following hydroxide is amphoteric in nature?
Answer» Which of the following hydroxide is amphoteric in nature?

Discussion

49.	Match the reactions with corresponding reagents:
Answer» Match the reactions with corresponding reagents:

Discussion

50.	(Me)2SiCl2 on hydrolysis will produce -
Answer» $(M e)_{2} S i C l_{2}$ on hydrolysis will produce -

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If the energy of the electron in hydrogen atom in a certain excited state is −3.4 eV, then what will be its angular momentum?

Why do D-Block elements have greater horizontal similarities in contrast to main group elements?

Thermodynamically the most stable form of carbon is (a) diamond (b) graphite (c) fullerenes (d) coal

The decreasing order of the rate of dehydration for the above compounds is:

25 mL of household solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In the titration of the liberated iodine, 48 mL of 0.25 N Na2S2O3 was used to reach the end point. The molarity of the household bleach solution is

NaCl + H​​​​​​2​​​​​​​​​​​​​​​​​​​O= HCl + NaOH Can we use this reaction to prepare Con. HCl ?

In the given reaction major product 'X' will be:

Two elementsXY2 X atomic weight 75 and Y atomic weight 16 combine to give compound having 75.8% of X. The formula of the compound is

At high temperatures, nitrogen directly combines with:

Which of the following conversions is known as Stephen’s reduction?

When a bottle of cold drink is opened, the gas comes out with a fizze due to -

Which of the following configuration follows Hund's rule:

Addition of HCl to propene in presence of peroxides gives

Inert pair effect occurs due to non participation of electron in which bonding orbital?

If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be

A compound mistakenly named 3,4-dimethylbutane should be named correctly as:

The complex [Pt(Py)(NH3)BrCl] will have how many geometrical isomers?

Which of the following is not a resonating structure of each other?

Hydrogen ion concentration in mol/L in a solution of pH​ 5.4 will be

Which of the following order is correct?

Oxidation state of Cr in K2Cr2O7 is

Which of the following statement is correct?

What is common for H+, D+ and T+

Which bond angle θwould result in the maximum dipole moment for the triatomic molecule YXY

Reaction of toluene with I-Cl in presence of AlCl3 in cold and dark gives

Which of the following is/are hard water(s)?

Which of the following reaction is incorrect?

Which one of the following sets forms the biodegradable polymer ?

The raw material used in Nylon-6 is

Find the strongest acid among the following compounds.

If the radius of Fe2+ is 0.76∘A, the radius of Fe3+ is

Arrange the following compounds in order of increasing reactivity towards nucleophilic substitution.

9.5×10−3% MgCl2 and 1.36×10−4% CaSO4 are present in water. What is the measured hardness of water in terms of CaCO3? (Given : molar mass of MgCl2 and CaSO4 are 95 and 136 g/mol respectively. )

Which is the correct statement for the given acids? H3PO2 and H3PO3

Alveoli are tiny sacs in the lungs whose average diameter is 5×10−10 m. Consider an oxygen molecule (5.3×10−26 kg) trapped within an alveolus. Calculate the uncertainty in the velocity of the oxygen molecule.

On electrolysis of Brine solution, is produced at anode and , at cathode.

Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously? (a) Li (b) Na (c) K (d) Cs

The solubility in water of a sparingly soluble salt PbBr2 is 6.6×10−6 mol L−1. What is the concentration of Br−(aq) in a saturated solution of PbBr2(s)? (1.65)13=1.18

Consider a weak electrolyte, AB3 having a concentration of 0.1 M in solution. If the degree of dissociation is 0.2, Calculate the ionisation constant Ki of AB3.

An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu and 8.82% abundance with 21.99 amu. Calculate the average atomic mass of this element.

How many mol of potassium chlorate is to be heated to produce 5.6 litres of oxygen at 0 ∘C and 1 atm?

The nitrogen base found only in DNA is also called

Which of the following hydroxide is amphoteric in nature?

Match the reactions with corresponding reagents:

(Me)2SiCl2 on hydrolysis will produce -

NaCl + H2O= HCl + NaOH Can we use this reaction to prepare Con. HCl ?

Hydrogen ion concentration in mol/L in a solution of pH 5.4 will be