46295 + Interview Questions in Chemistry

1.	The maximum s-character is exhibited by the orbitals of which central atom?
Answer» The maximum s-character is exhibited by the orbitals of which central atom?

Discussion

2.	The diagonal partner of element B is
Answer» The diagonal partner of element $B$ is

Discussion

3.	Hyper conjugation involves overlap of the following orbitals:
Answer» Hyper conjugation involves overlap of the following orbitals:

Discussion

4.	Which of the following will not show both optical isomerism and geometrical isomerism?
Answer» Which of the following will not show both optical isomerism and geometrical isomerism?

Discussion

5.	Calculate the amount of benzoic acid (C6H5COOH) required for preparing 250 mL of 0.15 M solution in methanol.
Answer» Calculate the amount of benzoic acid $(C_{6} H_{5} C O O H)$ required for preparing 250 mL of 0.15 M solution in methanol.

Discussion

6.	0.5H2(g)+0.5Cl2(g)→HCl(g); ΔH0298= −22060 cal The mean heat capacities over this temperature range are, H2(g), Cp=6.82 calmol−1K−1; Cl2(g), Cp=7.7 calmol−1K−1; HCl(g), Cp=6.81 calmol−1K−1 The magnitude of the heat of formation of HCl(g)(in cal) at 348 K from the above data will be:
Answer» $0.5 H_{2} (g) + 0.5 C l_{2} (g) \to H C l (g); Δ H_{298}^{0} = - 22060 c a l$ The mean heat capacities over this temperature range are, $H_{2} (g), C_{p} = 6.82 c a l m o l^{- 1} K^{- 1}; C l_{2} (g), C_{p} = 7.7 c a l m o l^{- 1} K^{- 1}; H C l (g), C_{p} = 6.81 c a l m o l^{- 1} K^{- 1}$ The magnitude of the heat of formation of $H C l (g)$ (in cal) at $348 K$ from the above data will be:

Discussion

7.	The molarity of a glucose solution containing 36 g of glucose per 400 mL of the solutioni is:
Answer» The molarity of a glucose solution containing 36 g of glucose per 400 mL of the solutioni is:

Discussion

8.	One mole of one of the sodium salts listed below, having carbon content close to 14.3% produces 1 mole of carbon dioxide upon heating (atomic mass Na = 23, H = 1, C = 12, O = 16). The salt is:
Answer» One mole of one of the sodium salts listed below, having carbon content close to 14.3% produces 1 mole of carbon dioxide upon heating (atomic mass Na = 23, H = 1, C = 12, O = 16). The salt is:

Discussion

9.	A single hydrogen atom in ground state is given least energy E0 so that it can emit Hβ – line in the Balmer series, then:
Answer» A single hydrogen atom in ground state is given least energy $E_{0}$ so that it can emit $H_{β}$ – line in the Balmer series, then:

Discussion

10.	Which of the elements listed below occurs in allotropic form
Answer» Which of the elements listed below occurs in allotropic form

Discussion

11.	Match the items of Column I with items of Column II. Column I Column IIA.Methanol1.Conversion of phenol to o−hydroxysalicylic acidB.Kolbe′s reaction2.Ethyl alcoholC.Williamson′s synthesis3.Conversion of phenol to salicylaldehydeD.Conversion of 2∘ alcohol to ketone4.Wood spiritE.Reimer−Tiemann reaction5.Heated copper at 573KF.Fermentation6.Reaction of alkyl halide with sodium alkoxide
Answer» Match the items of Column I with items of Column II. $\begin{matrix} C o l u m n I & C o l u m n I I A . & M e t h a n o l & 1. & C o n v e r s i o n o f p h e n o l t o o - h y d r o x y s a l i c y l i c a c i d B . & K o l b e^{'} s r e a c t i o n & 2. & E t h y l a l c o h o l C . & W i l l i a m s o n^{'} s s y n t h e s i s & 3. & C o n v e r s i o n o f p h e n o l t o s a l i c y l a l d e h y d e D . & C o n v e r s i o n o f 2^{\circ} a l c o h o l t o k e t o n e & 4. & W o o d s p i r i t E . & R e i m e r - T i e m a n n r e a c t i o n & 5. & H e a t e d c o p p e r a t 573 K F . & F e r m e n t a t i o n & 6. & R e a c t i o n o f a l k y l h a l i d e w i t h s o d i u m a l k o x i d e \end{matrix}$

Discussion

12.	Acetylene when reacts with two molecules of HBr, it gives :
Answer» Acetylene when reacts with two molecules of HBr, it gives :

Discussion

13.	The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A+4B→3C+4D, when 5 moles of A react with 6 moles of B, then (i) Which is the limiting reagent ? (ii) Calculate the amount of C formed ?
Answer» The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction $2 A + 4 B \to 3 C + 4 D,$ when 5 moles of A react with 6 moles of B, then (i) Which is the limiting reagent ? (ii) Calculate the amount of C formed ?

13.

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A+4B→3C+4D, when 5 moles of A react with 6 moles of B, then (i) Which is the limiting reagent ? (ii) Calculate the amount of C formed ?

Answer»

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction $2 A + 4 B \to 3 C + 4 D,$ when 5 moles of A react with 6 moles of B, then

(i) Which is the limiting reagent ?

(ii) Calculate the amount of C formed ?

Discussion

14.	The total number of stereoisomers that can exist for M is
Answer» The total number of stereoisomers that can exist for M is

14.

The total number of stereoisomers that can exist for M is

Answer»

The total number of stereoisomers that can exist for M is

Discussion

15.	Δ Uθ of combustion of methane is –XkJmol−1. The value of Δ Hθ is (i) =Δ Uθ (ii) >Δ Uθ (iii) <Δ Uθ (iv) =0
Answer» $Δ U^{θ}$ of combustion of methane is $- X k J m o l^{- 1}$ . The value of $Δ H^{θ}$ is (i) $= Δ U^{θ}$ (ii) $> Δ U^{θ}$ (iii) $< Δ U^{θ}$ (iv) $= 0$

15.

Δ Uθ of combustion of methane is –XkJmol−1. The value of Δ Hθ is (i) =Δ Uθ (ii) >Δ Uθ (iii) <Δ Uθ (iv) =0

Answer»

$Δ U^{θ}$ of combustion of methane is $- X k J m o l^{- 1}$ . The value of $Δ H^{θ}$ is

(i) $= Δ U^{θ}$
(ii) $> Δ U^{θ}$
(iii) $< Δ U^{θ}$
(iv) $= 0$

Discussion

16.	Two grams of gas A are introduced in an evacuated flask at 25oC . The pressure of the gas is 1 atm. Now 3 g of another gas is introduced in the same flask, the total pressure becomes 1.5 atm. The ratio of molecular mass MA and MB is x:y. Find the value of x×y
Answer» Two grams of gas $A$ are introduced in an evacuated flask at $25^{o} C$ . The pressure of the gas is $1 a t m$ . Now $3 g$ of another gas is introduced in the same flask, the total pressure becomes $1.5 a t m$ . The ratio of molecular mass $M_{A}$ and $M_{B}$ is $x : y$ . Find the value of $x \times y$

Discussion

17.	HC≡CH2CH3MgBr⟶(A) (2)2CO2−−−−−−−−→(ii)HOH/H⊕ (B) H2SO4−−−−→HgSO4 (C) Δ→ (D) If the Molecular weight of D is x gm, then write your answer as x2
Answer» $H C \equiv C H 2 C H_{3} M g B r ⟶ (A) (2) 2 C O_{2} - ------- \to (i i) H O H / H^{\oplus} (B) H_{2} S O_{4} - --- \to H g S O_{4} (C) Δ \to (D)$ If the Molecular weight of D is $x g m$ , then write your answer as $\frac{x}{2}$

Discussion

18.	25g of 80% pure CaCO3 is made to react with excess of HCl. Calculate volume of CO2 evolved at NTP.
Answer» 25g of 80% pure Ca $C O_{3}$ is made to react with excess of HCl. Calculate volume of $C O_{2}$ evolved at NTP.

Discussion

19.	The Van’t Hoff factor for 0.1M BaCl2 is 2.74. The percentage dissociation of the salt is
Answer» The Van’t Hoff factor for 0.1M $B a C l_{2}$ is 2.74. The percentage dissociation of the salt is

Discussion

20.	A planar structure of length L and width W is made of two different optical media of refractive indices n1=1.5 and n2=1.44 as shown in figure. If L>>W, a ray entering from end AB will emerge from end CD only if the total internal reflection condition is met inside the structure. For L=9.6 m, if the incident angle θ is varied, the maximum time taken by a ray to exit the plane CD is t×10−9 s, where t is. [Speed of light c=3×108 m/s]
Answer» A planar structure of length L and width W is made of two different optical media of refractive indices $n_{1} = 1.5$ and $n_{2} = 1.44$ as shown in figure. If $L >> W$ , a ray entering from end AB will emerge from end CD only if the total internal reflection condition is met inside the structure. For $L = 9.6 m$ , if the incident angle $θ$ is varied, the maximum time taken by a ray to exit the plane CD is $t \times 10^{- 9} s$ , where $t$ is. [Speed of light $c = 3 \times 10^{8} m / s$ ]

Discussion

21.	Which one of the alkali metals forms only the normal oxide M2O on heating in air?
Answer» Which one of the alkali metals forms only the normal oxide $M_{2} O$ on heating in air?

Discussion

22.	n1 and n2 moles of two ideal gases (mol. wt. M1 and M2) respectively at temperature T1K and T2K are mixed. Assuming that no loss of energy, the temperature of mixture becomes -
Answer» $n_{1}$ and $n_{2}$ moles of two ideal gases (mol. wt. $M_{1}$ and $M_{2}$ ) respectively at temperature $T_{1}$ K and $T_{2}$ K are mixed. Assuming that no loss of energy, the temperature of mixture becomes -

Discussion

23.	Which are correct match (i) Eka silicon - Sc (ii) Eka aluminium - Ga (iii) Eka manganese - Tc (iv) Eka scandium - B
Answer» Which are correct match (i) Eka silicon - Sc (ii) Eka aluminium - Ga (iii) Eka manganese - Tc (iv) Eka scandium - B

Discussion

24.	Find out incorrect order of the dipole moment among the following pairs of compound:
Answer» Find out incorrect order of the dipole moment among the following pairs of compound:

Discussion

25.	180 g of a hydrocarbon reacts fully with excess oxygen and produces 264 g of CO2 and 108 g of H2O. If the ratio of molar mass of the hydrocarbon to the empirical formula mass is 6 then find the molecular formula of given hydrocarbon.
Answer» 180 g of a hydrocarbon reacts fully with excess oxygen and produces 264 g of $C O_{2}$ and 108 g of $H_{2} O$ . If the ratio of molar mass of the hydrocarbon to the empirical formula mass is 6 then find the molecular formula of given hydrocarbon.

Discussion

26.	A cyclic process ABCDA has 4 steps. Heats involved in all processes are given by QAB=4800 Joules, QBC=1000 Joules, QCD=500 Cal and QDA=−1000 Cal. Find efficiency of engine based on above cyclic process. (1 Cal = 4.2 Joules)
Answer» A cyclic process ABCDA has 4 steps. Heats involved in all processes are given by $Q_{A B} = 4800 J o u l e s$ , $Q_{B C} = 1000 J o u l e s$ , $Q_{C D} = 500 C a l$ and $Q_{D A} = - 1000 C a l$ . Find efficiency of engine based on above cyclic process. (1 Cal = 4.2 Joules)

Discussion

27.	Which of the following gases has the highest average speed at 400 K? (Molar masses of U=238g/mol, S=32g/mol and F=19g/mol
Answer» Which of the following gases has the highest average speed at $400 K$ ? (Molar masses of $U = 238 g / m o l$ , $S = 32 g / m o l$ and $F = 19 g / m o l$

Discussion

28.	Which of the following occurs during the light-dependent reactions of plants?
Answer» Which of the following occurs during the light-dependent reactions of plants?

Discussion

29.	Which of the following easily reacts with water producing hydrogen ?
Answer» Which of the following easily reacts with water producing hydrogen ?

Discussion

30.	Which of the following is the strongest oxidant:
Answer» Which of the following is the strongest oxidant:

Discussion

31.	1 mole of an aliphatic compound C3H8 is completely burnt in an excess of O2. The reacted moles of oxygen are:
Answer» 1 mole of an aliphatic compound $C_{3} H_{8}$ is completely burnt in an excess of $O_{2}$ . The reacted moles of oxygen are:

Discussion

32.	Which of the following give(s) a meso-compound as the main product?
Answer» Which of the following give(s) a meso-compound as the main product?

Discussion

33.	Frenkel defects are not found in alkali metals halides reason out
Answer» Frenkel defects are not found in alkali metals halides reason out

Discussion

34.	Match the following: (1) I2 (i) Ionic solid (2) Cu (ii) Covalent solid (3) Diamond (iii) Molecular solid (4) ZnS (iv) Metallic solid
Answer» Match the following: (1) I $_{2}$ (i) Ionic solid (2) Cu (ii) Covalent solid (3) Diamond (iii) Molecular solid (4) ZnS (iv) Metallic solid

34.

Match the following: (1) I2 (i) Ionic solid (2) Cu (ii) Covalent solid (3) Diamond (iii) Molecular solid (4) ZnS (iv) Metallic solid

Answer»

Match the following:

(1) I $_{2}$ (i) Ionic solid

(2) Cu (ii) Covalent solid

(3) Diamond (iii) Molecular solid

(4) ZnS (iv) Metallic solid

Discussion

35.

Match List I with List II and select the correct answer List-I List-II A. Mond’s process 1. Purification of Ag containing Pb B. Van Arkel method 2. Purification of Ge C. Cupellation 3. Purification of Nickel D. Zone refining 4. Purification of Titanium

Answer»

Match List I with List II and select the correct answer

List-I	List-II
A. Mond’s process	1. Purification of Ag containing Pb
B. Van Arkel method	2. Purification of Ge
C. Cupellation	3. Purification of Nickel
D. Zone refining	4. Purification of Titanium

Discussion

36.	The number of liters of air required to burn 8 litres of ethene is
Answer» The number of liters of air required to burn 8 litres of ethene is

Discussion

37.	Method of preparation of haloarenes by electrophilic substitution reaction
Answer» Method of preparation of haloarenes by electrophilic substitution reaction

Discussion

38.	A compound 'X' reacts with conc. Sulphuric acid to give an alkene. The alkene reacts with bromine and subsequent treatment of the product with alcoholic KOH yields propyne. The formula of the compound is
Answer» A compound 'X' reacts with conc. Sulphuric acid to give an alkene. The alkene reacts with bromine and subsequent treatment of the product with alcoholic KOH yields propyne. The formula of the compound is

Discussion

39.	The set(s) representing the correct order of ionic radius is/are:
Answer» The set(s) representing the correct order of ionic radius is/are:

Discussion

40.	How to convert oxidation potential to reduction potential?
Answer» How to convert oxidation potential to reduction potential?

Discussion

41.	Which of the following techniques is most suitable for purification of cyclohexanone from a mixture containing benzoic acid, isoamyl alcohol, cyclohexane and cyclohexanone?
Answer» Which of the following techniques is most suitable for purification of cyclohexanone from a mixture containing benzoic acid, isoamyl alcohol, cyclohexane and cyclohexanone?

Discussion

42.	Which among the following compound will show tautomerism?
Answer» Which among the following compound will show tautomerism?

42.

Which among the following compound will show tautomerism?

Answer»

Which among the following compound will show tautomerism?

Discussion

43.	Which of the following is the correct sequence for atomic radii Al3+ > Na+ >Cl- Na+ > Al3+ >Cl- Al3+ > Cl- > Na+ Cl- > Na+ > Al3+
Answer» Which of the following is the correct sequence for atomic radii Al³⁺ > Na⁺ >Cl^- Na⁺ > Al³⁺ >Cl^- Al³⁺> Cl^-> Na⁺ Cl^-> Na⁺> Al³⁺

43.

Which of the following is the correct sequence for atomic radii Al3+ > Na+ >Cl- Na+ > Al3+ >Cl- Al3+ > Cl- > Na+ Cl- > Na+ > Al3+

Answer»

Which of the following is the correct sequence for atomic radii

Al³⁺ > Na⁺ >Cl^-
Na⁺ > Al³⁺ >Cl^-
Al³⁺> Cl^-> Na⁺
Cl^-> Na⁺> Al³⁺

Discussion

44.	Write the structure of prop-2-en-1-amine.
Answer» Write the structure of prop-2-en-1-amine.

Discussion

45.	How to find relation between Delta E and delta H in a given chemical equation 2Ag + O2 = 2Ag2O
Answer» How to find relation between Delta E and delta H in a given chemical equation 2Ag + O₂= 2Ag₂O

Discussion

46.	The mole fraction of benzene in a solution in Toluene is 0.40. Calculate the weight percent of benzene in the solution.
Answer» The mole fraction of benzene in a solution in Toluene is 0.40. Calculate the weight percent of benzene in the solution.

Discussion

47.	Which among the following is the correct sequence?
Answer» Which among the following is the correct sequence?

Discussion

48.	Which one of the following represents a wrong set of quantum numbers for an electron in an atom? (arranged as n, l, m, and s)
Answer» Which one of the following represents a wrong set of quantum numbers for an electron in an atom? (arranged as n, l, m, and s)

Discussion

49.	The compressibility factor for an ideal gas is:
Answer» The compressibility factor for an ideal gas is:

Discussion

50.	Irreversible process is
Answer» Irreversible process is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The maximum s-character is exhibited by the orbitals of which central atom?

The diagonal partner of element B is

Hyper conjugation involves overlap of the following orbitals:

Which of the following will not show both optical isomerism and geometrical isomerism?

Calculate the amount of benzoic acid (C6H5COOH) required for preparing 250 mL of 0.15 M solution in methanol.

0.5H2(g)+0.5Cl2(g)→HCl(g); ΔH0298= −22060 cal The mean heat capacities over this temperature range are, H2(g), Cp=6.82 calmol−1K−1; Cl2(g), Cp=7.7 calmol−1K−1; HCl(g), Cp=6.81 calmol−1K−1 The magnitude of the heat of formation of HCl(g)(in cal) at 348 K from the above data will be:

The molarity of a glucose solution containing 36 g of glucose per 400 mL of the solutioni is:

One mole of one of the sodium salts listed below, having carbon content close to 14.3% produces 1 mole of carbon dioxide upon heating (atomic mass Na = 23, H = 1, C = 12, O = 16). The salt is:

A single hydrogen atom in ground state is given least energy E0 so that it can emit Hβ – line in the Balmer series, then:

Which of the elements listed below occurs in allotropic form

Acetylene when reacts with two molecules of HBr, it gives :

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A+4B→3C+4D, when 5 moles of A react with 6 moles of B, then (i) Which is the limiting reagent ? (ii) Calculate the amount of C formed ?

The total number of stereoisomers that can exist for M is

Δ Uθ of combustion of methane is –XkJmol−1. The value of Δ Hθ is (i) =Δ Uθ (ii) &gt;Δ Uθ (iii) &lt;Δ Uθ (iv) =0

Two grams of gas A are introduced in an evacuated flask at 25oC . The pressure of the gas is 1 atm. Now 3 g of another gas is introduced in the same flask, the total pressure becomes 1.5 atm. The ratio of molecular mass MA and MB is x:y. Find the value of x×y

HC≡CH2CH3MgBr⟶(A) (2)2CO2−−−−−−−−→(ii)HOH/H⊕ (B) H2SO4−−−−→HgSO4 (C) Δ→ (D) If the Molecular weight of D is x gm, then write your answer as x2

25g of 80% pure CaCO3 is made to react with excess of HCl. Calculate volume of CO2 evolved at NTP.

The Van’t Hoff factor for 0.1M BaCl2 is 2.74. The percentage dissociation of the salt is

Which one of the alkali metals forms only the normal oxide M2O on heating in air?

n1 and n2 moles of two ideal gases (mol. wt. M1 and M2) respectively at temperature T1K and T2K are mixed. Assuming that no loss of energy, the temperature of mixture becomes -

Which are correct match (i) Eka silicon - Sc (ii) Eka aluminium - Ga (iii) Eka manganese - Tc (iv) Eka scandium - B

Find out incorrect order of the dipole moment among the following pairs of compound:

180 g of a hydrocarbon reacts fully with excess oxygen and produces 264 g of CO2 and 108 g of H2O. If the ratio of molar mass of the hydrocarbon to the empirical formula mass is 6 then find the molecular formula of given hydrocarbon.

A cyclic process ABCDA has 4 steps. Heats involved in all processes are given by QAB=4800 Joules, QBC=1000 Joules, QCD=500 Cal and QDA=−1000 Cal. Find efficiency of engine based on above cyclic process. (1 Cal = 4.2 Joules)

Which of the following gases has the highest average speed at 400 K? (Molar masses of U=238g/mol, S=32g/mol and F=19g/mol

Which of the following occurs during the light-dependent reactions of plants?

Which of the following easily reacts with water producing hydrogen ?

Which of the following is the strongest oxidant:

1 mole of an aliphatic compound C3H8 is completely burnt in an excess of O2. The reacted moles of oxygen are:

Which of the following give(s) a meso-compound as the main product?

Frenkel defects are not found in alkali metals halides reason out

Match the following: (1) I2 (i) Ionic solid (2) Cu (ii) Covalent solid (3) Diamond (iii) Molecular solid (4) ZnS (iv) Metallic solid

Match List I with List II and select the correct answer List-I List-II A. Mond’s process 1. Purification of Ag containing Pb B. Van Arkel method 2. Purification of Ge C. Cupellation 3. Purification of Nickel D. Zone refining 4. Purification of Titanium

The number of liters of air required to burn 8 litres of ethene is

Method of preparation of haloarenes by electrophilic substitution reaction

A compound 'X' reacts with conc. Sulphuric acid to give an alkene. The alkene reacts with bromine and subsequent treatment of the product with alcoholic KOH yields propyne. The formula of the compound is

The set(s) representing the correct order of ionic radius is/are:

How to convert oxidation potential to reduction potential?

Which of the following techniques is most suitable for purification of cyclohexanone from a mixture containing benzoic acid, isoamyl alcohol, cyclohexane and cyclohexanone?

Which among the following compound will show tautomerism?

Which of the following is the correct sequence for atomic radii Al3+ &gt; Na+ &gt;Cl- Na+ &gt; Al3+ &gt;Cl- Al3+ &gt; Cl- &gt; Na+ Cl- &gt; Na+ &gt; Al3+

Write the structure of prop-2-en-1-amine.

How to find relation between Delta E and delta H in a given chemical equation 2Ag + O2 = 2Ag2O

The mole fraction of benzene in a solution in Toluene is 0.40. Calculate the weight percent of benzene in the solution.

Which among the following is the correct sequence?

Which one of the following represents a wrong set of quantum numbers for an electron in an atom? (arranged as n, l, m, and s)

The compressibility factor for an ideal gas is:

Irreversible process is

Δ Uθ of combustion of methane is –XkJmol−1. The value of Δ Hθ is (i) =Δ Uθ (ii) >Δ Uθ (iii) <Δ Uθ (iv) =0

Which of the following is the correct sequence for atomic radii Al3+ > Na+ >Cl- Na+ > Al3+ >Cl- Al3+ > Cl- > Na+ Cl- > Na+ > Al3+