46295 + Interview Questions in Chemistry

1.	Which of the following molecules will show both hyperconjugation and mesomeric effect?
Answer» Which of the following molecules will show both hyperconjugation and mesomeric effect?

Discussion

2.	7. the pressure of a gas in an isothermal container is 200 KPa.if half of the gas is removed from it ,the pressure will be
Answer» 7. the pressure of a gas in an isothermal container is 200 KPa.if half of the gas is removed from it ,the pressure will be

Discussion

3.	Cyclic hydrocarbon ′A′ has all the carbon and hydrogen atoms in a single plane. All the carbon carbon bonds have the same length, less than 1.54A∘, but more than 1.34A∘. The bond angle will be
Answer» Cyclic hydrocarbon $^{'} A^{'}$ has all the carbon and hydrogen atoms in a single plane. All the carbon carbon bonds have the same length, less than $1.54 A^{\circ}$ , but more than $1.34 A^{\circ}$ . The bond angle will be

Discussion

4.	Calculate the n-factor of KMnO4?
Answer» Calculate the n-factor of $K M n O_{4}$ ?

Discussion

5.	how to obtain ace†an u- ilide from chlorobenzene?
Answer» how to obtain ace†an u- ilide from chlorobenzene?

Discussion

6.	The mass of a body is 5×10^-6 kg.What is this mass in (a)gram,(b)milligram, (c)microgram
Answer» The mass of a body is 5×10^-6 kg.What is this mass in (a)gram,(b)milligram, (c)microgram

Discussion

7.	Ifand,then find
Answer» If and, then find

Discussion

8.	For the reaction, 2Fe(NO3)3+3Na2CO3→Fe2(CO3)3+6NaNO3, initially if 3 moles of Fe(NO3)3 and 3.6 moles of Na2CO3 is taken and 6.3 moles of NaNO3 is obtained, then the % yield of given reaction is:
Answer» For the reaction, $2 F e (N O_{3})_{3} + 3 N a_{2} C O_{3} \to F e_{2} (C O_{3})_{3} + 6 N a N O_{3}$ , initially if $3$ moles of $F e (N O_{3})_{3}$ and $3.6$ moles of $N a_{2} C O_{3}$ is taken and $6.3$ moles of $N a N O_{3}$ is obtained, then the $%$ yield of given reaction is:

Discussion

9.	If solubility product of a sparingly soluble salt, Ag2SO3 is 8×10−14 at 25oC . Calculate the concentration of Ag+(aq) in its saturated solution at equilibrium. Given : 3√20=2.71
Answer» If solubility product of a sparingly soluble salt, $A g_{2} S O_{3}$ is $8 \times 10^{- 14}$ at $25^{o} C$ . Calculate the concentration of $A g^{+} (a q)$ in its saturated solution at equilibrium. Given : $\sqrt[3]{20} = 2.71$

Discussion

10.	How to make the molecular orbital diagram for O2- (superoxide ion) ?
Answer» How to make the molecular orbital diagram for O2- (superoxide ion) ?

Discussion

11.	find solubulity product of cu2cl2 cupper chlorid
Answer» find solubulity product of cu2cl2 cupper chlorid

Discussion

12.	What is role of isolated gaseous atom in Electron affinity concept?
Answer» What is role of isolated gaseous atom in Electron affinity concept?

Discussion

13.	The dimensions of a, b and c are
Answer» The dimensions of a, b and c are

Discussion

14.	The most stable conformation of ethane is
Answer» The most stable conformation of ethane is

Discussion

15.	What happens when CrO3+H2SO4 i.e. jone's reagent is added to secondary alcohol?
Answer» What happens when CrO3+H2SO4 i.e. jone's reagent is added to secondary alcohol?

Discussion

16.	Propene, CH3-CH=CH2 can be converted to 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion [CBSE PMT 1991]
Answer» Propene, CH₃-CH=CH₂ can be converted to 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion [CBSE PMT 1991]

16.

Propene, CH3-CH=CH2 can be converted to 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion [CBSE PMT 1991]

Answer»

Propene, CH₃-CH=CH₂ can be converted to 1-propanol by oxidation. Which set of reagents among the following is

ideal to effect the conversion [CBSE PMT 1991]

Discussion

17.	The Mn3+ ion is unstable in solution and undergoes disproportionation to give Mn2+, MnO2, and H+ ion. Write a balanced ionic equation for the reaction.
Answer» The Mn³⁺ ion is unstable in solution and undergoes disproportionation to give Mn²⁺, MnO₂, and H⁺ ion. Write a balanced ionic equation for the reaction.

Discussion

18.	An element is represented by ZXA, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element.Mass number (A) = Number of protons (Z) + Number of neutrons.Isoelectronic: Species/ elements having same number of electronIsodiaphers: Elements having same value of \|(A−2Z)\|Isotopes: Atoms having same number of protonWhich of the following species is isoelectronic with the hydride ion?
Answer» An element is represented by $_{Z} X^{A}$ , where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element. Mass number (A) = Number of protons (Z) + Number of neutrons. Isoelectronic: Species/ elements having same number of electron Isodiaphers: Elements having same value of $\| (A - 2 Z) \|$ Isotopes: Atoms having same number of proton Which of the following species is isoelectronic with the hydride ion?

Discussion

19.	1.What will be the orbital diagram of oxygen
Answer» 1.What will be the orbital diagram of oxygen

Discussion

20.	How to determine whether a reaction follows sn1 or sn2 mechanism
Answer» How to determine whether a reaction follows sn1 or sn2 mechanism

Discussion

21.	Total number of voids per unit cell if a metal crystallises into hcp is (1) 4 (2) 12 (3)18 (4) 8
Answer» Total number of voids per unit cell if a metal crystallises into hcp is (1) 4 (2) 12 (3)18 (4) 8

Discussion

22.	Compound A formed during the course of above reaction is:
Answer» Compound A formed during the course of above reaction is:

Discussion

23.	Compare the acidic character of 2-nitrophenol, 3-nitrophenol & 4-nitrophenol. Is this valid for all the compounds showing Intramolecular Hydrogen Bonding?
Answer» Compare the acidic character of 2-nitrophenol, 3-nitrophenol & 4-nitrophenol. Is this valid for all the compounds showing Intramolecular Hydrogen Bonding?

Discussion

24.	What are analgesics?
Answer» What are analgesics?

Discussion

25.	0.5 L of gaseous hydrocarbon when burnt in excess of O_2 gave 3.5 L of CO_2 and 4L of water vapours under same conditions. Molecular formula of the hydrocarbon will be 1)C_4H_8 2)C_4H_{10} 3)C_7H_{16} 4)C_5H_1
Answer» 0.5 L of gaseous hydrocarbon when burnt in excess of O_2 gave 3.5 L of CO_2 and 4L of water vapours under same conditions. Molecular formula of the hydrocarbon will be 1)C_4H_8 2)C_4H_{10} 3)C_7H_{16} 4)C_5H_1

Discussion

26.	If one of the atoms is removed from a simple cubic unit cell the effective number of atoms remaining in a unit cell is
Answer» If one of the atoms is removed from a simple cubic unit cell the effective number of atoms remaining in a unit cell is

Discussion

27.	The Electron Gain Enthalpy of Alkali Metals are negative or positive??
Answer» The Electron Gain Enthalpy of Alkali Metals are negative or positive??

Discussion

28.	28. What colour changes are observed when Lead is put in a sloution of Cupric chloride
Answer» 28. What colour changes are observed when Lead is put in a sloution of Cupric chloride

Discussion

29.	The Cahn-Ingold-Prelog (CIP) priorities of the groups and the absolute configuration (R/S) of the following compound are:
Answer» The Cahn-Ingold-Prelog (CIP) priorities of the groups and the absolute configuration (R/S) of the following compound are:

Discussion

30.	The order of basic character of given oxides is:
Answer» The order of basic character of given oxides is:

Discussion

31.	Possible product among the following is:
Answer» Possible product among the following is:

Discussion

32.	21. The solubility of PbCl2 in water is 0.01M at 25^° c maximum concentration of Pb2+ in 0.1M NaCl will be
Answer» 21. The solubility of PbCl2 in water is 0.01M at 25^° c maximum concentration of Pb2+ in 0.1M NaCl will be

Discussion

33.	Why do same elements like Hydrogen , oxygen have different oxidation number with different types of element ?
Answer» Why do same elements like Hydrogen , oxygen have different oxidation number with different types of element ?

Discussion

34.	Mention one major difference between the anaerobic respiration carried out by yeast and in our muscle cells.
Answer» Mention one major difference between the anaerobic respiration carried out by yeast and in our muscle cells.

Discussion

35.	How to distinguish between PHENOL and 2,4-DI-NITROPHENOL.
Answer» How to distinguish between PHENOL and 2,4-DI-NITROPHENOL.

Discussion

36.	42 CH3)CHCl - CHCl(CH3) + KI -> (CH3)CHI-CHI(CH3) . Why is this substitution taking place since leaving tendency of Cl is less than that of I ?
Answer» 42 CH3)CHCl - CHCl(CH3) + KI -> (CH3)CHI-CHI(CH3) . Why is this substitution taking place since leaving tendency of Cl is less than that of I ?

Discussion

37.	10. Define the term polar protic? how does it affect a nucleophile as we go down a group in a periodic table (considering elements f,cl,br,i)
Answer» 10. Define the term polar protic? how does it affect a nucleophile as we go down a group in a periodic table (considering elements f,cl,br,i)

Discussion

38.	How Al(ph)3 form dimer? By banana bonding or other.
Answer» How Al(ph)3 form dimer? By banana bonding or other.

Discussion

39.	14. How many orbitals are possible for the following quantum numbers ?n=4,l=2,m=-2
Answer» 14. How many orbitals are possible for the following quantum numbers ?n=4,l=2,m=-2

Discussion

40.	PCl5⇌PCl3+Cl2 in the reversible reaction, the moles of PCl5, PCl3 and Cl2 are a, b and c respectively at equilibrium and total pressure is P, then value of Kp is:
Answer» $P C l_{5} ⇌ P C l_{3} + C l_{2}$ in the reversible reaction, the moles of $P C l_{5}$ , $P C l_{3}$ and $C l_{2}$ are a, b and c respectively at equilibrium and total pressure is P, then value of $K_{p}$ is:

Discussion

41.	In anode Ray experiment with hydrogen gas in the discharge tube, how do scientists concluded that hydrogen is the one with 1 proton and 1 electron
Answer» In anode Ray experiment with hydrogen gas in the discharge tube, how do scientists concluded that hydrogen is the one with 1 proton and 1 electron

Discussion

42.	2. The arrangement of (CH3)3C, (CH3)2CH-, CH3CH2-, when attached to benzene or unsaturated group in increasing order of activating effect is?
Answer» 2. The arrangement of (CH3)3C, (CH3)2CH-, CH3CH2-, when attached to benzene or unsaturated group in increasing order of activating effect is?

Discussion

43.	The temperature at which the surface tension of water is zero
Answer» The temperature at which the surface tension of water is zero

Discussion

44.	Atthe isoelectric point for amino acid, the species present are:
Answer» At the isoelectric point for amino acid, the species present are:

Discussion

45.	10.The value of Kc=4.24 at 800k for the reaction CO+H2O gives out CO2+H2 calculate equilibrium concentration of CO2,H2,CO,H2O if only CO and H2O are present initially at concentration of 0.10M each.
Answer» 10.The value of Kc=4.24 at 800k for the reaction CO+H2O gives out CO2+H2 calculate equilibrium concentration of CO2,H2,CO,H2O if only CO and H2O are present initially at concentration of 0.10M each.

Discussion

46.	A certain particle carries 2.5 × 10–16 C of static electric charge. Calculate the number of electrons present in it.
Answer» A certain particle carries 2.5 × $10^{- 16}$ C of static electric charge. Calculate the number of electrons present in it.

Discussion

47.	The factors that influence the ionization energies are:
Answer» The factors that influence the ionization energies are:

Discussion

48.	State why an aqueous solution of ammonia turns red litmus blue
Answer» State why an aqueous solution of ammonia turns red litmus blue

Discussion

49.	What is second order reaction
Answer» What is second order reaction

Discussion

50.	How did Planck was able to explain the distribution of intensity in the radiation from black body as a function of frequency or wavelength at different temperatures?
Answer» How did Planck was able to explain the distribution of intensity in the radiation from black body as a function of frequency or wavelength at different temperatures?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following molecules will show both hyperconjugation and mesomeric effect?

7. the pressure of a gas in an isothermal container is 200 KPa.if half of the gas is removed from it ,the pressure will be

Cyclic hydrocarbon ′A′ has all the carbon and hydrogen atoms in a single plane. All the carbon carbon bonds have the same length, less than 1.54A∘, but more than 1.34A∘. The bond angle will be

Calculate the n-factor of KMnO4?

how to obtain ace†an u- ilide from chlorobenzene?

The mass of a body is 5×10^-6 kg.What is this mass in (a)gram,(b)milligram, (c)microgram

Ifand,then find

For the reaction, 2Fe(NO3)3+3Na2CO3→Fe2(CO3)3+6NaNO3, initially if 3 moles of Fe(NO3)3 and 3.6 moles of Na2CO3 is taken and 6.3 moles of NaNO3 is obtained, then the % yield of given reaction is:

If solubility product of a sparingly soluble salt, Ag2SO3 is 8×10−14 at 25oC . Calculate the concentration of Ag+(aq) in its saturated solution at equilibrium. Given : 3√20=2.71

How to make the molecular orbital diagram for O2- (superoxide ion) ?

find solubulity product of cu2cl2 cupper chlorid

What is role of isolated gaseous atom in Electron affinity concept?

The dimensions of a, b and c are

The most stable conformation of ethane is

What happens when CrO3+H2SO4 i.e. jone's reagent is added to secondary alcohol?

Propene, CH3-CH=CH2 can be converted to 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion [CBSE PMT 1991]

The Mn3+ ion is unstable in solution and undergoes disproportionation to give Mn2+, MnO2, and H+ ion. Write a balanced ionic equation for the reaction.

1.What will be the orbital diagram of oxygen

How to determine whether a reaction follows sn1 or sn2 mechanism

Total number of voids per unit cell if a metal crystallises into hcp is (1) 4 (2) 12 (3)18 (4) 8

Compound A formed during the course of above reaction is:

Compare the acidic character of 2-nitrophenol, 3-nitrophenol & 4-nitrophenol. Is this valid for all the compounds showing Intramolecular Hydrogen Bonding?

What are analgesics?

0.5 L of gaseous hydrocarbon when burnt in excess of O_2 gave 3.5 L of CO_2 and 4L of water vapours under same conditions. Molecular formula of the hydrocarbon will be 1)C_4H_8 2)C_4H_{10} 3)C_7H_{16} 4)C_5H_1

If one of the atoms is removed from a simple cubic unit cell the effective number of atoms remaining in a unit cell is

The Electron Gain Enthalpy of Alkali Metals are negative or positive??

28. What colour changes are observed when Lead is put in a sloution of Cupric chloride

The Cahn-Ingold-Prelog (CIP) priorities of the groups and the absolute configuration (R/S) of the following compound are:

The order of basic character of given oxides is:

Possible product among the following is:

21. The solubility of PbCl2 in water is 0.01M at 25^° c maximum concentration of Pb2+ in 0.1M NaCl will be

Why do same elements like Hydrogen , oxygen have different oxidation number with different types of element ?

Mention one major difference between the anaerobic respiration carried out by yeast and in our muscle cells.

How to distinguish between PHENOL and 2,4-DI-NITROPHENOL.

42 CH3)CHCl - CHCl(CH3) + KI -> (CH3)CHI-CHI(CH3) . Why is this substitution taking place since leaving tendency of Cl is less than that of I ?

10. Define the term polar protic? how does it affect a nucleophile as we go down a group in a periodic table (considering elements f,cl,br,i)

How Al(ph)3 form dimer? By banana bonding or other.

14. How many orbitals are possible for the following quantum numbers ?n=4,l=2,m=-2

PCl5⇌PCl3+Cl2 in the reversible reaction, the moles of PCl5, PCl3 and Cl2 are a, b and c respectively at equilibrium and total pressure is P, then value of Kp is:

In anode Ray experiment with hydrogen gas in the discharge tube, how do scientists concluded that hydrogen is the one with 1 proton and 1 electron

2. The arrangement of (CH3)3C, (CH3)2CH-, CH3CH2-, when attached to benzene or unsaturated group in increasing order of activating effect is?

The temperature at which the surface tension of water is zero

Atthe isoelectric point for amino acid, the species present are:

10.The value of Kc=4.24 at 800k for the reaction CO+H2O gives out CO2+H2 calculate equilibrium concentration of CO2,H2,CO,H2O if only CO and H2O are present initially at concentration of 0.10M each.

A certain particle carries 2.5 × 10–16 C of static electric charge. Calculate the number of electrons present in it.

The factors that influence the ionization energies are:

State why an aqueous solution of ammonia turns red litmus blue

What is second order reaction

How did Planck was able to explain the distribution of intensity in the radiation from black body as a function of frequency or wavelength at different temperatures?