46295 + Interview Questions in Chemistry

1.	Prove that Aᵢⱼ = (-1)i+j ₓ Mᵢⱼ [where A is the co-factor & M is the minor ]
Answer» Prove that Aᵢⱼ = (-1)^i+j ₓ Mᵢⱼ [where A is the co-factor & M is the minor ]

Discussion

2.	At 273k temp nd 1 bar pressure volume occupied by a triatomic gas is 224ml & its Mass is 1 gm then calculate atomic mass of that gas
Answer» At 273k temp nd 1 bar pressure volume occupied by a triatomic gas is 224ml & its Mass is 1 gm then calculate atomic mass of that gas

Discussion

3.	A sample of radioactive material has mass m, decay constant λ and molecular weight M. The initial activity of the sample is ___[Take : Avogadro constant =NA ]
Answer» A sample of radioactive material has mass $m$ , decay constant $λ$ and molecular weight $M$ . The initial activity of the sample is ___ [Take : Avogadro constant = $N_{A}$ ]

Discussion

4.	Initially 22.2 g of calcium chloride are dissolved in water to make a 500 mL solution. Then the solution is again diluted upto 2000 mL. Calculate the molarity of Cl− ions in the final solution if the 80% of the given salt dissociates in the final solution:
Answer» Initially $22.2 g$ of calcium chloride are dissolved in water to make a $500 mL$ solution. Then the solution is again diluted upto $2000 mL$ . Calculate the molarity of $C l^{-}$ ions in the final solution if the $80 %$ of the given salt dissociates in the final solution:

Discussion

5.	Consider a gold nucleus to be a sphere of radius 6.9 fermi in which protons and neutrons are distributed. find the force of replusion between two protons situtaed at largest dista
Answer» Consider a gold nucleus to be a sphere of radius 6.9 fermi in which protons and neutrons are distributed. find the force of replusion between two protons situtaed at largest dista

Discussion

6.	During discharging of Pb storage battery, theconcentration of H2SO4 decrease with time. Calculatethe time, for which a current of 1 A can be drawnfrom the cell of 1 M initial concentration to 0.5 Mfinal concentration. (volume of solution5 lit).(assume volume remains same)
Answer» During discharging of Pb storage battery, theconcentration of H2SO4 decrease with time. Calculatethe time, for which a current of 1 A can be drawnfrom the cell of 1 M initial concentration to 0.5 Mfinal concentration. (volume of solution5 lit).(assume volume remains same)

Discussion

7.	The correct order of the metalic character is:
Answer» The correct order of the metalic character is:

Discussion

8.	8.Hydrolysis of sucrose gives:- Sucrose + H2O =Glucose + Fructose. Equilibrium constant K for the reaction is 2 x 10 to the power 13 at 300 K. Calculate G at 300 K
Answer» 8.Hydrolysis of sucrose gives:- Sucrose + H2O =Glucose + Fructose. Equilibrium constant K for the reaction is 2 x 10 to the power 13 at 300 K. Calculate G at 300 K

Discussion

9.	What is the final major product of the following reaction ?
Answer» What is the final major product of the following reaction ?

Discussion

10.	find the product and type of reaction shown by m-bromo anisole and NaNH2
Answer» find the product and type of reaction shown by m-bromo anisole and NaNH2

Discussion

11.	At 27∘C, hydrogen is leaked through a tiny hole into a vessel for 20 minutes. Another unknown gas at the same temperature and pressure leaked through the same hole for 20 minute. After the effusion of the gases the mixture exerts a pressure of 9 atm. The hydrogen content of the mixture is 0.7 mole. If the volume of the container is 3 L, what is the molecular mass of the unknown gas (in g)?
Answer» At $27^{\circ} C$ , hydrogen is leaked through a tiny hole into a vessel for 20 minutes. Another unknown gas at the same temperature and pressure leaked through the same hole for 20 minute. After the effusion of the gases the mixture exerts a pressure of 9 atm. The hydrogen content of the mixture is 0.7 mole. If the volume of the container is 3 L, what is the molecular mass of the unknown gas (in g)?

Discussion

12.	Identify the major product Y:
Answer» Identify the major product Y:

Discussion

13.	Kinetic energy and pressure of a gas of unit volume are related as:
Answer» Kinetic energy and pressure of a gas of unit volume are related as:

Discussion

14.	Fluorine reacts with ice and results in the change:H2O(s) + F2(g) → HF(g) + HOF(g)Justify that this reaction is a redox reaction.
Answer» Fluorine reacts with ice and results in the change: H₂O(s) + F₂(g) → HF(g) + HOF(g) Justify that this reaction is a redox reaction.

14.

Fluorine reacts with ice and results in the change:H2O(s) + F2(g) → HF(g) + HOF(g)Justify that this reaction is a redox reaction.

Answer»

Fluorine reacts with ice and results in the change:

H₂O(s) + F₂(g) → HF(g) + HOF(g)

Justify that this reaction is a redox reaction.

Discussion

15.	Which of the following alkanes can not be synthesized in good yield by Wurtz reaction?
Answer» Which of the following alkanes can not be synthesized in good yield by Wurtz reaction?

Discussion

16.	Chargaff's rule states that in an organism [CBSE PMT 2003]
Answer» Chargaff's rule states that in an organism [CBSE PMT 2003]

16.

Chargaff's rule states that in an organism [CBSE PMT 2003]

Answer»

Chargaff's rule states that in an organism

[CBSE PMT 2003]

Discussion

17.	At what temperatures does Wien's Law fail?
Answer» At what temperatures does Wien's Law fail?

Discussion

18.	If M0 is the mass of an oxygen isotope 8O17. MP and MN are the mass of a proton and a neutron respectively, the nuclear binding energy of the isotope is
Answer» If $M_{0}$ is the mass of an oxygen isotope $_{8} O^{17}$ . $M_{P}$ and $M_{N}$ are the mass of a proton and a neutron respectively, the nuclear binding energy of the isotope is

Discussion

19.	In the following sequence, product I, J, and L are formed. K represents a reagent. Which of the following structures/reagents are appropriate for J or K?
Answer» In the following sequence, product I, J, and L are formed. K represents a reagent. Which of the following structures/reagents are appropriate for J or K?

19.

In the following sequence, product I, J, and L are formed. K represents a reagent. Which of the following structures/reagents are appropriate for J or K?

Answer»

In the following sequence, product I, J, and L are formed. K represents a reagent.

Which of the following structures/reagents are appropriate for J or K?

Discussion

20.	What is the difference between structural motif and lattice point? Pl explain in detail, if possible with a diagram also.
Answer» What is the difference between structural motif and lattice point? Pl explain in detail, if possible with a diagram also.

Discussion

21.	Equal volumes of two HCl solutions of pH=3 and pH=5 were mixed. What is the pH of the resulting solution? (Given: log(0.505)=−0.3)
Answer» Equal volumes of two $H C l$ solutions of $p H = 3$ and $p H = 5$ were mixed. What is the $p H$ of the resulting solution? (Given: $log (0.505) = - 0.3$ )

Discussion

22.	For a first order reaction how much half lives are nearly required for 90 completion of reaction.
Answer» For a first order reaction how much half lives are nearly required for 90 completion of reaction.

Discussion

23.	40. 7.125 g of an acid (MW=114) is completely neutralized by 5 g of NaOH (MW=40) what is the basicity of the acid
Answer» 40. 7.125 g of an acid (MW=114) is completely neutralized by 5 g of NaOH (MW=40) what is the basicity of the acid

Discussion

24.	Assertion (A): Sodium metal is stored in kerosene Reason (R): The density of sodium is less than water
Answer» Assertion (A): Sodium metal is stored in kerosene Reason (R): The density of sodium is less than water

24.

Assertion (A): Sodium metal is stored in kerosene Reason (R): The density of sodium is less than water

Answer»

Assertion (A): Sodium metal is stored in kerosene

Reason (R): The density of sodium is less than water

Discussion

25.	Which of the following are isobars?4018Ar 146C 4020Ca 147N
Answer» Which of the following are isobars? $_{18}^{40} A r$ $_{6}^{14} C$ $_{20}^{40} C a$ $_{7}^{14} N$

25.

Which of the following are isobars?4018Ar 146C 4020Ca 147N

Answer»

Which of the following are isobars?

$_{18}^{40} A r$ $_{6}^{14} C$ $_{20}^{40} C a$ $_{7}^{14} N$

Discussion

26.	Which of the following atoms do not have neutrons?
Answer» Which of the following atoms do not have neutrons?

Discussion

27.	One one function
Answer» One one function

Discussion

28.	The amount of ice that will separate out on cooling a solution containing 50g of ethylene glycol in 200g of water to -9.3^° C is (K_f=1.86K/molal) (pleasGive detailed explanation of the situation)
Answer» The amount of ice that will separate out on cooling a solution containing 50g of ethylene glycol in 200g of water to -9.3^° C is (K_f=1.86K/molal) (pleasGive detailed explanation of the situation)

Discussion

29.	Limit of x tends to 0 cos x /x is
Answer» Limit of x tends to 0 cos x /x is

Discussion

30.	How much positive and negative charges are present in a cup of water?
Answer» How much positive and negative charges are present in a cup of water?

Discussion

31.	What is the product of reaction between neopentyl chloride andsodium ethoxide
Answer» What is the product of reaction between neopentyl chloride andsodium ethoxide

Discussion

32.	If the ionization energy of hydrogen is 313.8Kcal per mole, then the energy of the electron in 2nd excited state will be:-(1) 113.2 Kcal/mole (2) 78.45 Kcal/mole(3) 313.8 Kcal/mole (4) 35 Kcal/mole
Answer» If the ionization energy of hydrogen is 313.8Kcal per mole, then the energy of the electron in 2nd excited state will be:- (1) 113.2 Kcal/mole (2) 78.45 Kcal/mole (3) 313.8 Kcal/mole (4) 35 Kcal/mole

32.

If the ionization energy of hydrogen is 313.8Kcal per mole, then the energy of the electron in 2nd excited state will be:-(1) 113.2 Kcal/mole (2) 78.45 Kcal/mole(3) 313.8 Kcal/mole (4) 35 Kcal/mole

Answer»

If the ionization energy of hydrogen is 313.8Kcal per mole, then the energy of the electron in 2nd excited state will be:-

(1) 113.2 Kcal/mole

(2) 78.45 Kcal/mole

(3) 313.8 Kcal/mole

(4) 35 Kcal/mole

Discussion

33.	Q3-1,3,5 trihydroxy benzene on reaction with HCN+HCL and ZnCl2 +H2O gives?
Answer» Q3-1,3,5 trihydroxy benzene on reaction with HCN+HCL and ZnCl2 +H2O gives?

Discussion

34.	Predictif the solutions of the following salts are neutral, acidic or basic:NaCl,KBr, NaCN, NH4NO3,NaNO2and KF
Answer» Predict if the solutions of the following salts are neutral, acidic or basic: NaCl, KBr, NaCN, NH₄NO₃, NaNO₂ and KF

34.

Predictif the solutions of the following salts are neutral, acidic or basic:NaCl,KBr, NaCN, NH4NO3,NaNO2and KF

Answer»

Predict
if the solutions of the following salts are neutral, acidic or basic:

NaCl,
KBr, NaCN, NH₄NO₃,
NaNO₂
and KF

Discussion

35.	The osmotic pressure of a 5% (wt/vol) solution of cane sugar at 1500C is
Answer» The osmotic pressure of a 5% (wt/vol) solution of cane sugar at 150⁰C is

Discussion

36.	How many geometrical isomers are possible in [Pt(NH3)(H2O)(Py)(NO2)]+?
Answer» How many geometrical isomers are possible in $[P t (N H_{3}) (H_{2} O) (P y) (N O_{2})]^{+}$ ?

Discussion

37.	40. Explain the effect of cross conjugation on toutomerism in acetoacetic ester .
Answer» 40. Explain the effect of cross conjugation on toutomerism in acetoacetic ester .

Discussion

38.

Vapourpressure of pure acetone and chloroform at 328 K are 741.8 mm Hg and632.8 mm Hg respectively. Assuming that they form ideal solution overthe entire range of composition, plot ptotal’pchloroform’and pacetoneas a function of xacetone.The experimental data observed for different compositions of mixtureis. 100 ×xacetone 0 11.8 23.4 36.0 50.8 58.2 64.5 72.1 pacetone /mm Hg 0 54.9 110.1 202.4 322.7 405.9 454.1 521.1 pchloroform/mm Hg 632.8 548.1 469.4 359.7 257.7 193.6 161.2 120.7

Answer»

Vapour
pressure of pure acetone and chloroform at 328 K are 741.8 mm Hg and
632.8 mm Hg respectively. Assuming that they form ideal solution over
the entire range of composition, plot p_total’
p_chloroform’
and p_acetone
as a function of x_acetone.
The experimental data observed for different compositions of mixture
is.

100 ×x_acetone	0	11.8	23.4	36.0	50.8	58.2	64.5	72.1
p_acetone/mm Hg	0	54.9	110.1	202.4	322.7	405.9	454.1	521.1
p_chloroform/mm Hg	632.8	548.1	469.4	359.7	257.7	193.6	161.2	120.7

Discussion

39.	.The mass of N 2F4 produced by the reaction of 2.0 g of NH3 and 8.0 g of F2 is 3.56 g. What isthe per cent yield?
Answer» .The mass of N 2F4 produced by the reaction of 2.0 g of NH3 and 8.0 g of F2 is 3.56 g. What isthe per cent yield?

Discussion

40.	When propyne is treated with aqueous sulphuric acid in presence of HgSO4, the major product is:
Answer» When propyne is treated with aqueous sulphuric acid in presence of $H g S O_{4}$ , the major product is:

Discussion

41.	Which is the correct representation of the solubility product constant Ag2CrO4 of
Answer» Which is the correct representation of the solubility product constant $A g_{2} C r O_{4}$ of

41.

Which is the correct representation of the solubility product constant Ag2CrO4 of

Answer»

Which is the correct representation of the solubility product constant

$A g_{2} C r O_{4}$ of

Discussion

42.	Two moles of triatomic linear gas are taken through a reversible process starting from A as shown in figure. The volume ratio VBVA=4 and VCVA=16. If the temperature at 'A' is −73∘C then selectcorrect option: [Use : ln 2 = 0.7]
Answer» Two moles of triatomic linear gas are taken through a reversible process starting from A as shown in figure. The volume ratio $\frac{V_{B}}{V_{A}} = 4$ and $\frac{V_{C}}{V_{A}} = 16$ . If the temperature at 'A' is $- 73^{\circ} C$ then select correct option: [Use : ln 2 = 0.7]

Discussion

43.	The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is [2008]
Answer» The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is [2008]

Discussion

44.	27.A square matrix of order n is both involuntary and idempotent matrix. The value of the determinant of (A+I) is equal to (where I is an identity matrix of order n)
Answer» 27.A square matrix of order n is both involuntary and idempotent matrix. The value of the determinant of (A+I) is equal to (where I is an identity matrix of order n)

Discussion

45.	what volume of 0.1M HCOONa should be added to 50ml of 0.05M HCOOH to produce a buffer of pH=4 if p^Ka=3.7
Answer» what volume of 0.1M HCOONa should be added to 50ml of 0.05M HCOOH to produce a buffer of pH=4 if p^Ka=3.7

Discussion

46.	35. what is the order of primary,secondary & tertiary amines for sollubility in water?
Answer» 35. what is the order of primary,secondary & tertiary amines for sollubility in water?

Discussion

47.	Q8. In an endothermic reaction: 1. Energy of reactants >Energy of product 2.Energy of reactants =Energy of products 3.Energy of reactants < Energy of products 4Both (b) and (c)
Answer» Q8. In an endothermic reaction: 1. Energy of reactants >Energy of product 2.Energy of reactants =Energy of products 3.Energy of reactants < Energy of products 4Both (b) and (c)

Discussion

48.	85 In a multi electron atom, which of the following orbital described by these quantum numbers will have same energy in the absence of magnetic and electric fields A. n = 1 l = 0 m = 0 B. n = 2 l = 0 m = 0 C. n = 2 l = 0 m = 1 D. n = 3 l = 2 m = 1 E. n =3 l = 2 m = 0
Answer» 85 In a multi electron atom, which of the following orbital described by these quantum numbers will have same energy in the absence of magnetic and electric fields A. n = 1 l = 0 m = 0 B. n = 2 l = 0 m = 0 C. n = 2 l = 0 m = 1 D. n = 3 l = 2 m = 1 E. n =3 l = 2 m = 0

Discussion

49.	Which of the following statements is INCORRECT(1)BeSO4 < MgSO4 < CaSO4 < SrSO4 is the thermal stability order for group II sulphates(2)(SiH3)2O & H2O have the same hybridisation of O atom.(3)OF2 < H2O < Cl2O < ClO2 is the bond angle order(4)The dipole moments of chlorobenzene & m-Dichlorobenzene are equal
Answer» Which of the following statements is INCORRECT (1) BeSO4 < MgSO4 < CaSO4 < SrSO4 is the thermal stability order for group II sulphates (2) (SiH3)2O & H2O have the same hybridisation of O atom. (3) OF2 < H2O < Cl2O < ClO2 is the bond angle order (4) The dipole moments of chlorobenzene & m-Dichlorobenzene are equal

Discussion

50.	25. In Zn(EDTA) complex, ligand is 1) Hexadentate 2) tetradentate 3) bidentate 4) tridentate
Answer» 25. In Zn(EDTA) complex, ligand is 1) Hexadentate 2) tetradentate 3) bidentate 4) tridentate

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Prove that Aᵢⱼ = (-1)i+j ₓ Mᵢⱼ [where A is the co-factor & M is the minor ]

At 273k temp nd 1 bar pressure volume occupied by a triatomic gas is 224ml & its Mass is 1 gm then calculate atomic mass of that gas

A sample of radioactive material has mass m, decay constant λ and molecular weight M. The initial activity of the sample is ___[Take : Avogadro constant =NA ]

Initially 22.2 g of calcium chloride are dissolved in water to make a 500 mL solution. Then the solution is again diluted upto 2000 mL. Calculate the molarity of Cl− ions in the final solution if the 80% of the given salt dissociates in the final solution:

Consider a gold nucleus to be a sphere of radius 6.9 fermi in which protons and neutrons are distributed. find the force of replusion between two protons situtaed at largest dista

During discharging of Pb storage battery, theconcentration of H2SO4 decrease with time. Calculatethe time, for which a current of 1 A can be drawnfrom the cell of 1 M initial concentration to 0.5 Mfinal concentration. (volume of solution5 lit).(assume volume remains same)

The correct order of the metalic character is:

8.Hydrolysis of sucrose gives:- Sucrose + H2O =Glucose + Fructose. Equilibrium constant K for the reaction is 2 x 10 to the power 13 at 300 K. Calculate G at 300 K

What is the final major product of the following reaction ?

find the product and type of reaction shown by m-bromo anisole and NaNH2

Identify the major product Y:

Kinetic energy and pressure of a gas of unit volume are related as:

Fluorine reacts with ice and results in the change:H2O(s) + F2(g) → HF(g) + HOF(g)Justify that this reaction is a redox reaction.

Which of the following alkanes can not be synthesized in good yield by Wurtz reaction?

Chargaff's rule states that in an organism [CBSE PMT 2003]

At what temperatures does Wien's Law fail?

If M0 is the mass of an oxygen isotope 8O17. MP and MN are the mass of a proton and a neutron respectively, the nuclear binding energy of the isotope is

In the following sequence, product I, J, and L are formed. K represents a reagent. Which of the following structures/reagents are appropriate for J or K?

What is the difference between structural motif and lattice point? Pl explain in detail, if possible with a diagram also.

Equal volumes of two HCl solutions of pH=3 and pH=5 were mixed. What is the pH of the resulting solution? (Given: log(0.505)=−0.3)

For a first order reaction how much half lives are nearly required for 90 completion of reaction.

40. 7.125 g of an acid (MW=114) is completely neutralized by 5 g of NaOH (MW=40) what is the basicity of the acid

Assertion (A): Sodium metal is stored in kerosene Reason (R): The density of sodium is less than water

Which of the following are isobars?4018Ar 146C 4020Ca 147N

Which of the following atoms do not have neutrons?

One one function

The amount of ice that will separate out on cooling a solution containing 50g of ethylene glycol in 200g of water to -9.3^° C is (K_f=1.86K/molal) (pleasGive detailed explanation of the situation)

Limit of x tends to 0 cos x /x is

How much positive and negative charges are present in a cup of water?

What is the product of reaction between neopentyl chloride andsodium ethoxide

If the ionization energy of hydrogen is 313.8Kcal per mole, then the energy of the electron in 2nd excited state will be:-(1) 113.2 Kcal/mole (2) 78.45 Kcal/mole(3) 313.8 Kcal/mole (4) 35 Kcal/mole

Q3-1,3,5 trihydroxy benzene on reaction with HCN+HCL and ZnCl2 +H2O gives?

Predictif the solutions of the following salts are neutral, acidic or basic:NaCl,KBr, NaCN, NH4NO3,NaNO2and KF

The osmotic pressure of a 5% (wt/vol) solution of cane sugar at 1500C is

How many geometrical isomers are possible in [Pt(NH3)(H2O)(Py)(NO2)]+?

40. Explain the effect of cross conjugation on toutomerism in acetoacetic ester .

.The mass of N 2F4 produced by the reaction of 2.0 g of NH3 and 8.0 g of F2 is 3.56 g. What isthe per cent yield?

When propyne is treated with aqueous sulphuric acid in presence of HgSO4, the major product is:

Which is the correct representation of the solubility product constant Ag2CrO4 of

Two moles of triatomic linear gas are taken through a reversible process starting from A as shown in figure. The volume ratio VBVA=4 and VCVA=16. If the temperature at 'A' is −73∘C then selectcorrect option: [Use : ln 2 = 0.7]

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is [2008]

27.A square matrix of order n is both involuntary and idempotent matrix. The value of the determinant of (A+I) is equal to (where I is an identity matrix of order n)

what volume of 0.1M HCOONa should be added to 50ml of 0.05M HCOOH to produce a buffer of pH=4 if p^Ka=3.7

35. what is the order of primary,secondary & tertiary amines for sollubility in water?

Q8. In an endothermic reaction: 1. Energy of reactants >Energy of product 2.Energy of reactants =Energy of products 3.Energy of reactants < Energy of products 4Both (b) and (c)

85 In a multi electron atom, which of the following orbital described by these quantum numbers will have same energy in the absence of magnetic and electric fields A. n = 1 l = 0 m = 0 B. n = 2 l = 0 m = 0 C. n = 2 l = 0 m = 1 D. n = 3 l = 2 m = 1 E. n =3 l = 2 m = 0

25. In Zn(EDTA) complex, ligand is 1) Hexadentate 2) tetradentate 3) bidentate 4) tridentate