46295 + Interview Questions in Chemistry

1.	In which of the following reaction dichloro carbene is reaction intermediate
Answer» In which of the following reaction dichloro carbene is reaction intermediate

Discussion

2.	Number of sigma bonds in P4O10 is
Answer» Number of sigma bonds in $P_{4} O_{10}$ is

Discussion

3.	The formula for determination of density of unit cell is
Answer» The formula for determination of density of unit cell is

Discussion

4.	Which among the following compounds has maximum boiling point –
Answer» Which among the following compounds has maximum boiling point –

Discussion

5.	The ratio of velocities of diffusion of gases A and B is 1:4. If the ratio of their masses present in the mixture is 2:3, the ratio of their mole fractions is
Answer» The ratio of velocities of diffusion of gases A and B is 1:4. If the ratio of their masses present in the mixture is 2:3, the ratio of their mole fractions is

Discussion

6.	A 20 L container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the containers is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its value, will be (Given that: SrCO3(s)⇌SrO(s)+CO2(g).Kp=1.6atm)
Answer» A $20 L$ container at $400 K$ contains $C O_{2} (g)$ at pressure $0.4 a t m$ and an excess of $S r O$ (neglect the volume of solid $S r O$ ). The volume of the containers is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of $C O_{2}$ attains its value, will be (Given that: $S r C O_{3} (s) ⇌ S r O (s) + C O_{2} (g) . K_{p} = 1.6 a t m)$

Discussion

7.	How will you bring about the following conversions ? (i) Ethanol to but - 1 - yne (ii) Ethane to bromoethane (iii) Propene to 1 - nitropropane (iv) Toluene to benzyl alcohol (v) Propene to propyne (vi) Ethanol to ethyl fluoride (vii) Bromomethane to propanone (viii) But-1-ene to but-2-ene (ix) l - chlorobutane to n- octane (x) Benzene to biphenyl
Answer» How will you bring about the following conversions ? (i) Ethanol to but - 1 - yne (ii) Ethane to bromoethane (iii) Propene to 1 - nitropropane (iv) Toluene to benzyl alcohol (v) Propene to propyne (vi) Ethanol to ethyl fluoride (vii) Bromomethane to propanone (viii) But-1-ene to but-2-ene (ix) l - chlorobutane to n- octane (x) Benzene to biphenyl

7.

How will you bring about the following conversions ? (i) Ethanol to but - 1 - yne (ii) Ethane to bromoethane (iii) Propene to 1 - nitropropane (iv) Toluene to benzyl alcohol (v) Propene to propyne (vi) Ethanol to ethyl fluoride (vii) Bromomethane to propanone (viii) But-1-ene to but-2-ene (ix) l - chlorobutane to n- octane (x) Benzene to biphenyl

Answer»

How will you bring about the following conversions ?

(i) Ethanol to but - 1 - yne

(ii) Ethane to bromoethane

(iii) Propene to 1 - nitropropane

(iv) Toluene to benzyl alcohol

(v) Propene to propyne

(vi) Ethanol to ethyl fluoride

(vii) Bromomethane to propanone

(viii) But-1-ene to but-2-ene

(ix) l - chlorobutane to n- octane

(x) Benzene to biphenyl

Discussion

8.	Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant (25∘ C). (Given, Vapour Pressure Data at 25∘ C, benzene = 12.8 kPa, toluene = 3.85 kPa)
Answer» Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant ( $25^{\circ} C$ ). (Given, Vapour Pressure Data at $25^{\circ} C$ , benzene = 12.8 kPa, toluene = 3.85 kPa)

Discussion

9.	The magnitude of energy is maximum for nth Bohr orbit of a Hydrogen like atom. Predict the value of n.
Answer» The magnitude of energy is maximum for $n^{t h}$ Bohr orbit of a Hydrogen like atom. Predict the value of n.

Discussion

10.	Consider two sparingly soluble salts AB and AC. If AB has solubility as x mol L−1 in presence of AC , and AC has solubility as y mol L−1 in presence of AB. Which of the following relations are correct?
Answer» Consider two sparingly soluble salts $A B$ and $A C$ . If $A B$ has solubility as $x m o l L^{- 1}$ in presence of $A C$ , and $A C$ has solubility as $y m o l L^{- 1}$ in presence of $A B$ . Which of the following relations are correct?

Discussion

11.	What is an ideal gas?
Answer» What is an ideal gas?

Discussion

12.	Which of the following exhibits H-bonding?
Answer» Which of the following exhibits H-bonding?

Discussion

13.	In which orbital is the electron most tightly bound to the nucleus?
Answer» In which orbital is the electron most tightly bound to the nucleus?

Discussion

14.	(i) The energy of σ2pz molecular orbital is greater than π2px and π2py molecular orbitals in nitrogen molecule. Write the complete sequence of energy levels in the increasing order of energy in the molecule. Compare the relative stability and the magnetic behaviour of the following species. N2 (ii) N+2 (iii) N−2 (iv) N2+2
Answer» (i) The energy of $σ 2 p_{z}$ molecular orbital is greater than $π 2 p_{x} and π 2 p_{y}$ molecular orbitals in nitrogen molecule. Write the complete sequence of energy levels in the increasing order of energy in the molecule. Compare the relative stability and the magnetic behaviour of the following species. $N_{2}$ (ii) $N_{2}^{+}$ (iii) $N_{2}^{-}$ (iv) $N_{2}^{2 +}$

14.

(i) The energy of σ2pz molecular orbital is greater than π2px and π2py molecular orbitals in nitrogen molecule. Write the complete sequence of energy levels in the increasing order of energy in the molecule. Compare the relative stability and the magnetic behaviour of the following species. N2 (ii) N+2 (iii) N−2 (iv) N2+2

Answer»

(i)

The energy of $σ 2 p_{z}$ molecular orbital is greater than $π 2 p_{x} and π 2 p_{y}$ molecular orbitals in nitrogen molecule. Write the complete sequence of energy levels in the increasing order of energy in the molecule. Compare the relative stability and the magnetic behaviour of the following species.

$N_{2}$

(ii) $N_{2}^{+}$

(iii) $N_{2}^{-}$

(iv) $N_{2}^{2 +}$

Discussion

15.	Question 06 In NO_3^- ion, the number of bond pairs and lone pairs of electron on nitrogen atom are (a) 2, 2 (b) 3, 1 (c) 1, 3 (d) 4, 0
Answer» Question 06 In NO_3^- ion, the number of bond pairs and lone pairs of electron on nitrogen atom are (a) 2, 2 (b) 3, 1 (c) 1, 3 (d) 4, 0

15.

Question 06 In NO_3^- ion, the number of bond pairs and lone pairs of electron on nitrogen atom are (a) 2, 2 (b) 3, 1 (c) 1, 3 (d) 4, 0

Answer»

Question 06

In NO_3^- ion, the number of bond pairs and lone pairs of electron on nitrogen atom are

(a) 2, 2

(b) 3, 1

(c) 1, 3

(d) 4, 0

Discussion

16.	Find out the appropriate word which fits the 1st blank.
Answer» Find out the appropriate word which fits the 1st blank.

Discussion

17.	Which of the following is an example of a co-polymer?
Answer» Which of the following is an example of a co-polymer?

Discussion

18.	A compound is formed by two elements X and Y. Atoms of the element Y (as anions) make ccp and those of element X (as cations) occupy all the octahedral voids the formula for the compound is:
Answer» A compound is formed by two elements X and Y. Atoms of the element Y (as anions) make ccp and those of element X (as cations) occupy all the octahedral voids the formula for the compound is:

Discussion

19.	What is the correct order of bond dissociation enthalpies?
Answer» What is the correct order of bond dissociation enthalpies?

Discussion

20.	Maximum number of compounds are known in case of :
Answer» Maximum number of compounds are known in case of :

Discussion

21.	Total number of bonds present in styrene is
Answer» Total number of bonds present in styrene is

21.

Total number of bonds present in styrene is

Answer»

Total number of bonds present in styrene is

Discussion

22.	In gaseous reactions important for the understanding of the upper atmosphere H2O and O react bimolecularly to form two OH radicals. for this reaction is 72kJ at 500 K and Ea is 77 kJ mol-1, then Ea for the bimolecular recombination of two OH radicals to form H2O and O is:
Answer» In gaseous reactions important for the understanding of the upper atmosphere H₂O and O react bimolecularly to form two OH radicals. for this reaction is 72kJ at 500 K and E_a is 77 kJ mol^-1, then E_a for the bimolecular recombination of two OH radicals to form H₂O and O is:

Discussion

23.	A vessel having a volume of 5 litres contains 1.4 g of nitrogen at a temperature of 1800 K. The pressure of the gas if 30% of its molecules are dissociated into atoms at this temperature is:
Answer» A vessel having a volume of 5 litres contains $1.4 g$ of nitrogen at a temperature of $1800 K$ . The pressure of the gas if 30% of its molecules are dissociated into atoms at this temperature is:

Discussion

24.	A small uniform tube is bent into a circular tube of radius R and kept in the vertical plane. Equal volume of two liquids of densities ρ and σ (ρ>σ) fill half of the tube as shown . θ is the angle which the radius passing through the interface makes with the vertical. Then
Answer» A small uniform tube is bent into a circular tube of radius $R$ and kept in the vertical plane. Equal volume of two liquids of densities $ρ$ and $σ (ρ > σ)$ fill half of the tube as shown . $θ$ is the angle which the radius passing through the interface makes with the vertical. Then

Discussion

25.	Two parallel glass plates are dipped partly in the liquid of density ‘d’ keeping them vertical. If the distance between the plates is ‘x’, surface tension for the liquid is T and angle of contact is q, then rise of liquid between the plates due to capillary will be
Answer» Two parallel glass plates are dipped partly in the liquid of density ‘d’ keeping them vertical. If the distance between the plates is ‘x’, surface tension for the liquid is T and angle of contact is q, then rise of liquid between the plates due to capillary will be

Discussion

26.	The enthalpy change involved in oxidation of glucose is −2880 kJ mol−1. 25% of this energy is available for muscular work. If 100 kJ of muscular work is needed to walk one km, then the maximum distance (in km) that a person will be able to walk after taking 150 g of glucose is:
Answer» The enthalpy change involved in oxidation of glucose is $- 2880 {kJ mol}^{- 1}$ . 25% of this energy is available for muscular work. If $100 kJ$ of muscular work is needed to walk one km, then the maximum distance (in km) that a person will be able to walk after taking $150 g$ of glucose is:

Discussion

27.	50.0 mL of 0.10 M HCl is mixed with 50.0 mLof 0.10 M NaOH. The solution's temperature rises by 0.6oC. Calculate the enthalpy of neutralization per mole of HCl. Given : density and specific heat of solution is 1g mL−1 and 4.2 Jg−1 ∘C−1
Answer» $50.0 m L$ of $0.10 M H C l$ is mixed with $50.0 m L$ of $0.10 M N a O H$ . The solution's temperature rises by ${0.6}^{o} C .$ Calculate the enthalpy of neutralization per mole of $H C l$ . Given : density and specific heat of solution is $1 g m L^{- 1}$ and 4.2 $J g^{- 1 \circ} C^{- 1}$

Discussion

28.	In a F.C.C. arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centres. One of the A atom is missing from one corner in unit cell. The simplest formula of compound is
Answer» In a F.C.C. arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centres. One of the A atom is missing from one corner in unit cell. The simplest formula of compound is

Discussion

29.	The major product (A) is
Answer» The major product (A) is

Discussion

30.	Match the following: Column IColumn II(1) HCl(i)Polar Molecular solid(2)Ice(ii)Non−polar Molecular solid(3) CCl4(iii)H−bonded Molecular solid
Answer» Match the following: $\begin{matrix} C o l u m n I & C o l u m n I I (1) H C l & (i) P o l a r M o l e c u l a r s o l i d (2) I c e & (i i) N o n - p o l a r M o l e c u l a r s o l i d (3) C C l_{4} & (i i i) H - b o n d e d M o l e c u l a r s o l i d \end{matrix}$

30.

Match the following: Column IColumn II(1) HCl(i)Polar Molecular solid(2)Ice(ii)Non−polar Molecular solid(3) CCl4(iii)H−bonded Molecular solid

Answer»

Match the following:

$\begin{matrix} C o l u m n I & C o l u m n I I (1) H C l & (i) P o l a r M o l e c u l a r s o l i d (2) I c e & (i i) N o n - p o l a r M o l e c u l a r s o l i d (3) C C l_{4} & (i i i) H - b o n d e d M o l e c u l a r s o l i d \end{matrix}$

Discussion

31.	0.76 g of a silver salt of a dibasic acid was ignited. It gave 0.54 g of pure silver. The molecular mass of the acid is .
Answer» 0.76 g of a silver salt of a dibasic acid was ignited. It gave 0.54 g of pure silver. The molecular mass of the acid is .

Discussion

32.	At 0 oC, if the enthalpy of fusion of ice is 1365 kcal/mol. Then, the molar entropy change for melting of ice at 0 oC in kJ/mol is.
Answer» At $0^{o} C$ , if the enthalpy of fusion of ice is 1365 $k c a l / m o l$ . Then, the molar entropy change for melting of ice at $0^{o} C$ in $k J / m o l$ is.

Discussion

33.	Hess's law of constant heat summation in based on
Answer» Hess's law of constant heat summation in based on

Discussion

34.	Identify the most basic compound from the following.
Answer» Identify the most basic compound from the following.

Discussion

35.	The relative decrease in the vapour pressure of an aqueous solution containing 2 mol NaCI in 3 mol H2O is 0.5. This solution, on reaction with AgNO3 will form:-
Answer» The relative decrease in the vapour pressure of an aqueous solution containing 2 mol NaCI in 3 mol $H_{2} O$ is 0.5. This solution, on reaction with $A g N O_{3}$ will form:-

Discussion

36.	The number of atoms in 100 g of an FCC crystal with density d=10 g/cm3 and cell edge equal to 100 pm is equal to
Answer» The number of atoms in 100 g of an FCC crystal with density d=10 g/cm³ and cell edge equal to 100 pm is equal to

Discussion

37.	Benzoic acid undergoes dimerisation in benzene solution. The van't hoff factor "i" is related to the degree of association 'x' of the acid as:
Answer» Benzoic acid undergoes dimerisation in benzene solution. The van't hoff factor "i" is related to the degree of association 'x' of the acid as:

Discussion

38.	The edge length of face centred unit cubic cell is 508 pm If the radius of the cation is 110 pm the radius of the anion is [CBSE PMT 1998]
Answer» The edge length of face centred unit cubic cell is 508 pm If the radius of the cation is 110 pm the radius of the anion is [CBSE PMT 1998]

38.

The edge length of face centred unit cubic cell is 508 pm If the radius of the cation is 110 pm the radius of the anion is [CBSE PMT 1998]

Answer»

The edge length of face centred unit cubic cell is 508 pm If the radius of the cation is 110 pm the radius of the anion is

[CBSE PMT 1998]

Discussion

39.	Arrange the bonds in order of increasing ionic character in the molecules: LiF, K2O,N2,SO2andClF3.
Answer» Arrange the bonds in order of increasing ionic character in the molecules: LiF, $K_{2} O, N_{2}, S O_{2} a n d C l F_{3}$ .

Discussion

40.	Among the following compounds the one that is polar and has central atom with sp2 hybridisation is:
Answer» Among the following compounds the one that is polar and has central atom with $s p^{2}$ hybridisation is:

Discussion

41.	In Fruendlich Isotherm, the value of 1n is
Answer» In Fruendlich Isotherm, the value of $\frac{1}{n}$ is

Discussion

42.	Which of the following contains a coordinate covalent bond
Answer» Which of the following contains a coordinate covalent bond

42.

Which of the following contains a coordinate covalent bond

Answer»

Which of the following contains a coordinate covalent bond

Discussion

43.	The reducing power of a metal depends on various factor. Suggest the factor which makes Li, the strongest reducing agent in aquous solution. (a) Sublimation enthalpy (b) Lonisation enthalpy (c) Hydration enthalpy (d) Electron - gain enthalpy
Answer» The reducing power of a metal depends on various factor. Suggest the factor which makes Li, the strongest reducing agent in aquous solution. (a) Sublimation enthalpy (b) Lonisation enthalpy (c) Hydration enthalpy (d) Electron - gain enthalpy

Discussion

44.	Freidal-Crafts reaction is not given by
Answer» Freidal-Crafts reaction is not given by

Discussion

45.	Which hydroxide decomposes on heating?
Answer» Which hydroxide decomposes on heating?

Discussion

46.	Discuss the chemistry of Lassaigne’s test.
Answer» Discuss the chemistry of Lassaigne’s test.

Discussion

47.	Octet rule is not valid for which of the following compounds?
Answer» Octet rule is not valid for which of the following compounds?

Discussion

48.	In the manufacture of sodium carbonate, the following reactions are involved: (A)Δ−→(B)+CO2 (B)+H2O→(C)NH4Cl−−−−→(D) (E)+CO2→(F) (F)+NaCl→GHeat−−−→Na2CO3+CO2+H2O (D) is a gas which is soluble in H2O Compound (B) is:
Answer» In the manufacture of sodium carbonate, the following reactions are involved: $(A) Δ - \to (B) + {CO}_{2}$ $(B) + H_{2} O \to (C) N H_{4} C l - --- \to (D)$ $(E) + {CO}_{2} \to (F)$ $(F) + NaCl \to G H e a t - -- \to {Na}_{2} {CO}_{3} + {CO}_{2} + H_{2} O$ ${(D) is a gas which is soluble in H}_{2} O$ Compound (B) is:

Discussion

49.	In the reaction, C2O2−4 → CO2 , the total number of electrons lost per mole of C2O−24 is
Answer» In the reaction, $C_{2} O_{4}^{2 -}$ $\to$ $C O_{2}$ , the total number of electrons lost per mole of $C_{2} O_{4}^{- 2}$ is

Discussion

50.	The resistance of a conductivity cell containing 0.001 M KCl solution at 298 K is 1500Ω. What is the cell constant if conductivity of 0.001 M KCl solution at 298 K is 1.46×10−3S cm−1
Answer» The resistance of a conductivity cell containing 0.001 M KCl solution at 298 K is $1500 Ω$ . What is the cell constant if conductivity of 0.001 M KCl solution at 298 K is $1.46 \times 10^{- 3} S c m^{- 1}$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In which of the following reaction dichloro carbene is reaction intermediate

Number of sigma bonds in P4O10 is

The formula for determination of density of unit cell is

Which among the following compounds has maximum boiling point –

The ratio of velocities of diffusion of gases A and B is 1:4. If the ratio of their masses present in the mixture is 2:3, the ratio of their mole fractions is

Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant (25∘ C). (Given, Vapour Pressure Data at 25∘ C, benzene = 12.8 kPa, toluene = 3.85 kPa)

The magnitude of energy is maximum for nth Bohr orbit of a Hydrogen like atom. Predict the value of n.

Consider two sparingly soluble salts AB and AC. If AB has solubility as x mol L−1 in presence of AC , and AC has solubility as y mol L−1 in presence of AB. Which of the following relations are correct?

What is an ideal gas?

Which of the following exhibits H-bonding?

In which orbital is the electron most tightly bound to the nucleus?

Question 06 In NO_3^- ion, the number of bond pairs and lone pairs of electron on nitrogen atom are (a) 2, 2 (b) 3, 1 (c) 1, 3 (d) 4, 0

Find out the appropriate word which fits the 1st blank.

Which of the following is an example of a co-polymer?

A compound is formed by two elements X and Y. Atoms of the element Y (as anions) make ccp and those of element X (as cations) occupy all the octahedral voids the formula for the compound is:

What is the correct order of bond dissociation enthalpies?

Maximum number of compounds are known in case of :

Total number of bonds present in styrene is

In gaseous reactions important for the understanding of the upper atmosphere H2O and O react bimolecularly to form two OH radicals. for this reaction is 72kJ at 500 K and Ea is 77 kJ mol-1, then Ea for the bimolecular recombination of two OH radicals to form H2O and O is:

A vessel having a volume of 5 litres contains 1.4 g of nitrogen at a temperature of 1800 K. The pressure of the gas if 30% of its molecules are dissociated into atoms at this temperature is:

A small uniform tube is bent into a circular tube of radius R and kept in the vertical plane. Equal volume of two liquids of densities ρ and σ (ρ&gt;σ) fill half of the tube as shown . θ is the angle which the radius passing through the interface makes with the vertical. Then

Two parallel glass plates are dipped partly in the liquid of density ‘d’ keeping them vertical. If the distance between the plates is ‘x’, surface tension for the liquid is T and angle of contact is q, then rise of liquid between the plates due to capillary will be

The enthalpy change involved in oxidation of glucose is −2880 kJ mol−1. 25% of this energy is available for muscular work. If 100 kJ of muscular work is needed to walk one km, then the maximum distance (in km) that a person will be able to walk after taking 150 g of glucose is:

50.0 mL of 0.10 M HCl is mixed with 50.0 mLof 0.10 M NaOH. The solution's temperature rises by 0.6oC. Calculate the enthalpy of neutralization per mole of HCl. Given : density and specific heat of solution is 1g mL−1 and 4.2 Jg−1 ∘C−1

In a F.C.C. arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centres. One of the A atom is missing from one corner in unit cell. The simplest formula of compound is

The major product (A) is

Match the following: Column IColumn II(1) HCl(i)Polar Molecular solid(2)Ice(ii)Non−polar Molecular solid(3) CCl4(iii)H−bonded Molecular solid

0.76 g of a silver salt of a dibasic acid was ignited. It gave 0.54 g of pure silver. The molecular mass of the acid is .

At 0 oC, if the enthalpy of fusion of ice is 1365 kcal/mol. Then, the molar entropy change for melting of ice at 0 oC in kJ/mol is.

Hess's law of constant heat summation in based on

Identify the most basic compound from the following.

The relative decrease in the vapour pressure of an aqueous solution containing 2 mol NaCI in 3 mol H2O is 0.5. This solution, on reaction with AgNO3 will form:-

The number of atoms in 100 g of an FCC crystal with density d=10 g/cm3 and cell edge equal to 100 pm is equal to

Benzoic acid undergoes dimerisation in benzene solution. The van't hoff factor "i" is related to the degree of association 'x' of the acid as:

The edge length of face centred unit cubic cell is 508 pm If the radius of the cation is 110 pm the radius of the anion is [CBSE PMT 1998]

Arrange the bonds in order of increasing ionic character in the molecules: LiF, K2O,N2,SO2andClF3.

Among the following compounds the one that is polar and has central atom with sp2 hybridisation is:

In Fruendlich Isotherm, the value of 1n is

Which of the following contains a coordinate covalent bond

The reducing power of a metal depends on various factor. Suggest the factor which makes Li, the strongest reducing agent in aquous solution. (a) Sublimation enthalpy (b) Lonisation enthalpy (c) Hydration enthalpy (d) Electron - gain enthalpy

Freidal-Crafts reaction is not given by

Which hydroxide decomposes on heating?

Discuss the chemistry of Lassaigne’s test.

Octet rule is not valid for which of the following compounds?

In the manufacture of sodium carbonate, the following reactions are involved: (A)Δ−→(B)+CO2 (B)+H2O→(C)NH4Cl−−−−→(D) (E)+CO2→(F) (F)+NaCl→GHeat−−−→Na2CO3+CO2+H2O (D) is a gas which is soluble in H2O Compound (B) is:

In the reaction, C2O2−4 → CO2 , the total number of electrons lost per mole of C2O−24 is

The resistance of a conductivity cell containing 0.001 M KCl solution at 298 K is 1500Ω. What is the cell constant if conductivity of 0.001 M KCl solution at 298 K is 1.46×10−3S cm−1

A small uniform tube is bent into a circular tube of radius R and kept in the vertical plane. Equal volume of two liquids of densities ρ and σ (ρ>σ) fill half of the tube as shown . θ is the angle which the radius passing through the interface makes with the vertical. Then