46295 + Interview Questions in Chemistry

1.	A binary solid (A+B-) has a zinc blend structure with B- ion constituting the lattice and A+ion occupying the 25% tetrahedral voids. The formula of solid is _________
Answer» A binary solid (A⁺B^-) has a zinc blend structure with B^- ion constituting the lattice and A⁺ion occupying the 25% tetrahedral voids. The formula of solid is _________

Discussion

2.	What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?(a)(b)(c)
Answer» What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors? (a) (b) (c)

2.

What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?(a)(b)(c)

Answer»

What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?

(a)

(b)

(c)

Discussion

3.	Define the term solution. How many types of solutions are formed? Write briefly about each type with an example.
Answer» Define the term solution. How many types of solutions are formed? Write briefly about each type with an example.

Discussion

4.	GIVE THE IUPAC NAME : 1) CH3-CH (CH3)-CH2-CH(CH2-CH3)-COOH 2)CH3-CH(CH3)-CH2-CONH2 3)CH3-CH2-CH2-NH2
Answer» GIVE THE IUPAC NAME : 1) CH3-CH (CH3)-CH2-CH(CH2-CH3)-COOH 2)CH3-CH(CH3)-CH2-CONH2 3)CH3-CH2-CH2-NH2

Discussion

5.	What is the structure of 2,3,4 trichloro methyl pen†an e?
Answer» What is the structure of 2,3,4 trichloro methyl pen†an e?

Discussion

6.	20.4:4 Co-ordination is found in (1)ZnS (2)CuCl (3)AgI (4)All
Answer» 20.4:4 Co-ordination is found in (1)ZnS (2)CuCl (3)AgI (4)All

Discussion

7.	Mendeleev’s periodic law states that the properties of elements are a periodic function of their
Answer» Mendeleev’s periodic law states that the properties of elements are a periodic function of their

Discussion

8.	The ether which is not cleaved by HI even at 525 K Options: C6H5OCH3 C6H5OC3H7 CH3–O–CH3
Answer» The ether which is not cleaved by HI even at 525 K Options: C6H5OCH3 C6H5OC3H7 CH3–O–CH3

Discussion

9.	When particle enter uniform magnetic field at an angle alpha and return back at an angle beta then how could we define that path follows by negative charge particle is circular
Answer» When particle enter uniform magnetic field at an angle alpha and return back at an angle beta then how could we define that path follows by negative charge particle is circular

Discussion

10.	Very pure hydrogen (99.9%) can be made by which of the following processes?
Answer» Very pure hydrogen $(99.9 %)$ can be made by which of the following processes?

Discussion

11.	a car 2m long travelling at 30m/s overtakes another car 4m long travelling at 20m/s.the time taken by the first car to pass the second car is
Answer» a car 2m long travelling at 30m/s overtakes another car 4m long travelling at 20m/s.the time taken by the first car to pass the second car is

Discussion

12.	Markovnikov's rule is applicable toCh2=ch2Ch3-ch2-ch3Ch3-ch=ch-ch3(Ch3) 2-c=c-(ch3) (c2h5)
Answer» Markovnikov's rule is applicable to Ch2=ch2 Ch3-ch2-ch3 Ch3-ch=ch-ch3 (Ch3) 2-c=c-(ch3) (c2h5)

Discussion

13.	The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = 1.60×10−19C )
Answer» The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = $1.60 \times 10^{- 19} C$ )

Discussion

14.	The diffusion current in a P-N junction is-
Answer» The diffusion current in a P-N junction is-

14.

The diffusion current in a P-N junction is-

Answer»

The diffusion current in a P-N junction is-

Discussion

15.	What will be the major product when Ph – Ph is mononitrated?
Answer» What will be the major product when Ph – Ph is mononitrated?

Discussion

16.	Half of the ring is uniformly positively charged and other half uniformly negatively charged. What is the electric field on the axis due to the ring.
Answer» Half of the ring is uniformly positively charged and other half uniformly negatively charged. What is the electric field on the axis due to the ring.

Discussion

17.	Find the value of x in the equation xx−a+xx−b=2.
Answer» $Find the value of x in the equation \frac{x}{x - a} + \frac{x}{x - b} = 2.$

Discussion

18.	ntDelocalised molecular orbits are found inn nt1-H2n nt2-HS-n nt3-CH4n nt4-CO3-2n
Answer» ntDelocalised molecular orbits are found inn nt1-H2n nt2-HS-n nt3-CH4n nt4-CO3-2n

Discussion

19.	Identify the correct order of acidic strength of CO2, CuO, CaO and H2O.
Answer» Identify the correct order of acidic strength of $C O_{2}$ , CuO, CaO and $H_{2} O$ .

Discussion

20.	6. What are Lossen rearrangement & Curtius reaction & their mechanism?
Answer» 6. What are Lossen rearrangement & Curtius reaction & their mechanism?

Discussion

21.	25. How to calculate equivalent weight of acids? Give me all formulas and step by step explanation
Answer» 25. How to calculate equivalent weight of acids? Give me all formulas and step by step explanation

Discussion

22.	Choose the correct relation for boiling point elevation constant (Kb)where :Tb is boiling point of pure solvent M is molar mass of the solventLvap is the molar enthalpy of vapourisation per gram of the solvent R is ideal gas constant(All quantities to be taken in SI units)
Answer» Choose the correct relation for boiling point elevation constant $(K_{b})$ where : $T_{b} is boiling point of pure solvent$ $M is molar mass of the solvent$ $L_{v a p} is the molar enthalpy of vapourisation per gram of the solvent$ $R is ideal gas constant$ (All quantities to be taken in SI units)

Discussion

23.	17. The value of activation energy of a chemical reaction primarily depend on 1. Temperature 2. Nature of reacting species 3. Collision frequency 4. Concentration of reactants
Answer» 17. The value of activation energy of a chemical reaction primarily depend on 1. Temperature 2. Nature of reacting species 3. Collision frequency 4. Concentration of reactants

Discussion

24.	If the threshold wavelength (λ0) for the ejection of an electron from a metal is 110 nm, then the work function for the photoelectric emission is: (Planck's constant (h) = 6.6×10−341.8×10−18 J s)
Answer» If the threshold wavelength $(λ_{0})$ for the ejection of an electron from a metal is 110 nm, then the work function for the photoelectric emission is: (Planck's constant (h) = $6.6 \times 10^{- 34} 1.8 \times 10^{- 18} J s$ )

Discussion

25.	Which of the following reactions of glucose can be explained only by its cyclic structure? (a) Glucose forms pentaacetate (b) Blucose reacts with hydoxylamine to form an oxime (c) Pentaacetate of glucose does not reach with hydroxyl amine (d) Glucose is oxidised by nitric acid to gluconic acid
Answer» Which of the following reactions of glucose can be explained only by its cyclic structure? (a) Glucose forms pentaacetate (b) Blucose reacts with hydoxylamine to form an oxime (c) Pentaacetate of glucose does not reach with hydroxyl amine (d) Glucose is oxidised by nitric acid to gluconic acid

Discussion

26.	White phosphorous reacts with Sodium Hydroxide solution and disproportionates into Sodium ___ and ___ gas.
Answer» White phosphorous reacts with Sodium Hydroxide solution and disproportionates into Sodium ___ and ___ gas.

Discussion

27.	Select the in correct statement regarding resonatingstructures(1) Have same number of paired and unpairedelectrons(2) Have identical electronic arrangements(3) Have identical arrangements of all of the atoms(4) Have nearly same energies
Answer» Select the in correct statement regarding resonatingstructures(1) Have same number of paired and unpairedelectrons(2) Have identical electronic arrangements(3) Have identical arrangements of all of the atoms(4) Have nearly same energies

Discussion

28.	2.Is Gold Amphoteric oxides?
Answer» 2.Is Gold Amphoteric oxides?

Discussion

29.	Which compound is prepared by the following reaction?Xe (g)+2F2 (g)Ni vessel−−−−−−−−−→873 K, 6−7 atm
Answer» Which compound is prepared by the following reaction? $X e_{(g)} + 2 F_{2 (g)} N i vessel - -------- \to 873 K, 6 - 7 a t m$

Discussion

30.	If half life period for a first order reaction is 2 hrs than find out time taken for 100 % completion .
Answer» If half life period for a first order reaction is 2 hrs than find out time taken for 100 % completion .

Discussion

31.	Introduction of a methyl group in ammonia markedly increases the basic strength of ammonia in aq. solution, introduction of the second methyl group increases only marginally the basic strength of methyl amine in water. This is due to.
Answer» Introduction of a methyl group in ammonia markedly increases the basic strength of ammonia in aq. solution, introduction of the second methyl group increases only marginally the basic strength of methyl amine in water. This is due to.

Discussion

32.	The tendency of BF3,BCl3 and BBr3 to behave as Lewis acid decreases in the sequence
Answer» The tendency of $B F_{3}, B C l_{3}$ and $B B r_{3}$ to behave as Lewis acid decreases in the sequence

Discussion

33.	To synthesize the given compound via an SN2 reaction, themost appropriate combination is:
Answer» To synthesize the given compound via an $S_{N} 2$ reaction, themost appropriate combination is:

Discussion

34.	In the following sequence of reactions,The compounds B and C respectively are :
Answer» In the following sequence of reactions, The compounds B and C respectively are :

Discussion

35.	In a body centred unit cell, the particles are present at
Answer» In a body centred unit cell, the particles are present at

Discussion

36.	The strongest base in aqueous solution among the followingamines is(1) N-N-diethylethanamine(2)N-ethylethanamine (3)N-methylmethanamine (4)phenylmethanamine Aid with explanatio
Answer» The strongest base in aqueous solution among the followingamines is(1) N-N-diethylethanamine(2)N-ethylethanamine (3)N-methylmethanamine (4)phenylmethanamine Aid with explanatio

Discussion

37.	A metal M readily forms water soluble MSO4. It also forms oxide MO which becomes inert on heating. Hydroxide M(OH)2 is insoluble in water but soluble in NaOH solution. What is M ?
Answer» A metal $M$ readily forms water soluble $M S O_{4} .$ It also forms oxide $M O$ which becomes inert on heating. Hydroxide $M (O H)_{2}$ is insoluble in water but soluble in $N a O H$ solution. What is $M$ ?

Discussion

38.	The product (B) is:
Answer» The product (B) is:

Discussion

39.	what does 'two electron three center bond ' in structure of diborane mean ? Explai
Answer» what does 'two electron three center bond ' in structure of diborane mean ? Explai

Discussion

40.	why N(SiH)3 is planar?
Answer» why N(SiH)3 is planar?

Discussion

41.	What is heat of atomisation?
Answer» What is heat of atomisation?

Discussion

42.	Calculate the molarity of water at 4∘C.Given: Density of water at 4∘C=1g mL−1
Answer» Calculate the molarity of water at $4^{\circ} C .$ Given: Density of water at $4^{\circ} C = 1 g m L^{- 1}$

Discussion

43.	To prepare tert-butyl ethyl ether, the reagents required are:
Answer» To prepare tert-butyl ethyl ether, the reagents required are:

Discussion

44.	The boiling point of 1M aqueous solution of KNO3 is n nt1. 105.26 degree centigrade n nt2. 101.04 degree centigrade
Answer» The boiling point of 1M aqueous solution of KNO3 is n nt1. 105.26 degree centigrade n nt2. 101.04 degree centigrade

Discussion

45.	percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt. =78.4)then minimum molecular weight of peroxidase anhydrous enzyme is what??
Answer» percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt. =78.4)then minimum molecular weight of peroxidase anhydrous enzyme is what??

Discussion

46.	A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of 0.03 M KMnO4 solution to reach the end point. Number of moles of Fe2+ present in 250 mL solution is x×10−2 (consider complete dissolution of FeCl2). The amount of iron present in the sample is y% by weight.(Assume : KMnO4 reacts only with Fe2+ in the solutionUse : Molar mass of iron as 56 g mol−1 )The value of y is .
Answer» A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 $m L$ of solution. Titration of 25.0 $m L$ of this solution requires $12.5 m L of 0.03 M K M n O_{4}$ solution to reach the end point. Number of moles of $F e^{2 +}$ present in 250 $m L$ solution is $x \times 10^{- 2}$ (consider complete dissolution of $F e C l_{2}$ ). The amount of iron present in the sample is $y %$ by weight. (Assume : $K M n O_{4}$ reacts only with $F e^{2 +}$ in the solution Use : Molar mass of iron as $56 g m o l^{- 1}$ ) The value of $y$ is .

Discussion

47.	How many moles of hydrogen are present in 20g of 85% pure NaHCO3.
Answer» How many moles of hydrogen are present in 20g of $85 %$ pure $N a H C O_{3}$ .

Discussion

48.	16. If the volume of closed vessel in which the following simple reaction is carried out is reduced to one third of original volume the rate of the reaction becomes 2NO + O2 - 2NO2 1. One third 2. Three times 3. Nine times 4. Twenty seven times
Answer» 16. If the volume of closed vessel in which the following simple reaction is carried out is reduced to one third of original volume the rate of the reaction becomes 2NO + O2 - 2NO2 1. One third 2. Three times 3. Nine times 4. Twenty seven times

Discussion

49.	Meaning of free electrons
Answer» Meaning of free electrons

Discussion

50.	Those collisions which lead to the formation of products are called as:
Answer» Those collisions which lead to the formation of products are called as:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A binary solid (A+B-) has a zinc blend structure with B- ion constituting the lattice and A+ion occupying the 25% tetrahedral voids. The formula of solid is _________

What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?(a)(b)(c)

Define the term solution. How many types of solutions are formed? Write briefly about each type with an example.

GIVE THE IUPAC NAME : 1) CH3-CH (CH3)-CH2-CH(CH2-CH3)-COOH 2)CH3-CH(CH3)-CH2-CONH2 3)CH3-CH2-CH2-NH2

What is the structure of 2,3,4 trichloro methyl pen†an e?

20.4:4 Co-ordination is found in (1)ZnS (2)CuCl (3)AgI (4)All

Mendeleev’s periodic law states that the properties of elements are a periodic function of their

The ether which is not cleaved by HI even at 525 K Options: C6H5OCH3 C6H5OC3H7 CH3–O–CH3

When particle enter uniform magnetic field at an angle alpha and return back at an angle beta then how could we define that path follows by negative charge particle is circular

Very pure hydrogen (99.9%) can be made by which of the following processes?

a car 2m long travelling at 30m/s overtakes another car 4m long travelling at 20m/s.the time taken by the first car to pass the second car is

Markovnikov's rule is applicable toCh2=ch2Ch3-ch2-ch3Ch3-ch=ch-ch3(Ch3) 2-c=c-(ch3) (c2h5)

The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = 1.60×10−19C )

The diffusion current in a P-N junction is-

What will be the major product when Ph – Ph is mononitrated?

Half of the ring is uniformly positively charged and other half uniformly negatively charged. What is the electric field on the axis due to the ring.

Find the value of x in the equation xx−a+xx−b=2.

ntDelocalised molecular orbits are found inn nt1-H2n nt2-HS-n nt3-CH4n nt4-CO3-2n

Identify the correct order of acidic strength of CO2, CuO, CaO and H2O.

6. What are Lossen rearrangement & Curtius reaction & their mechanism?

25. How to calculate equivalent weight of acids? Give me all formulas and step by step explanation

Choose the correct relation for boiling point elevation constant (Kb)where :Tb is boiling point of pure solvent M is molar mass of the solventLvap is the molar enthalpy of vapourisation per gram of the solvent R is ideal gas constant(All quantities to be taken in SI units)

17. The value of activation energy of a chemical reaction primarily depend on 1. Temperature 2. Nature of reacting species 3. Collision frequency 4. Concentration of reactants

If the threshold wavelength (λ0) for the ejection of an electron from a metal is 110 nm, then the work function for the photoelectric emission is: (Planck's constant (h) = 6.6×10−341.8×10−18 J s)

Which of the following reactions of glucose can be explained only by its cyclic structure? (a) Glucose forms pentaacetate (b) Blucose reacts with hydoxylamine to form an oxime (c) Pentaacetate of glucose does not reach with hydroxyl amine (d) Glucose is oxidised by nitric acid to gluconic acid

White phosphorous reacts with Sodium Hydroxide solution and disproportionates into Sodium ___ and ___ gas.

Select the in correct statement regarding resonatingstructures(1) Have same number of paired and unpairedelectrons(2) Have identical electronic arrangements(3) Have identical arrangements of all of the atoms(4) Have nearly same energies

2.Is Gold Amphoteric oxides?

Which compound is prepared by the following reaction?Xe (g)+2F2 (g)Ni vessel−−−−−−−−−→873 K, 6−7 atm

If half life period for a first order reaction is 2 hrs than find out time taken for 100 % completion .

Introduction of a methyl group in ammonia markedly increases the basic strength of ammonia in aq. solution, introduction of the second methyl group increases only marginally the basic strength of methyl amine in water. This is due to.

The tendency of BF3,BCl3 and BBr3 to behave as Lewis acid decreases in the sequence

To synthesize the given compound via an SN2 reaction, themost appropriate combination is:

In the following sequence of reactions,The compounds B and C respectively are :

In a body centred unit cell, the particles are present at

The strongest base in aqueous solution among the followingamines is(1) N-N-diethylethanamine(2)N-ethylethanamine (3)N-methylmethanamine (4)phenylmethanamine Aid with explanatio

A metal M readily forms water soluble MSO4. It also forms oxide MO which becomes inert on heating. Hydroxide M(OH)2 is insoluble in water but soluble in NaOH solution. What is M ?

The product (B) is:

what does 'two electron three center bond ' in structure of diborane mean ? Explai

why N(SiH)3 is planar?

What is heat of atomisation?

Calculate the molarity of water at 4∘C.Given: Density of water at 4∘C=1g mL−1

To prepare tert-butyl ethyl ether, the reagents required are:

The boiling point of 1M aqueous solution of KNO3 is n nt1. 105.26 degree centigrade n nt2. 101.04 degree centigrade

percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt. =78.4)then minimum molecular weight of peroxidase anhydrous enzyme is what??

How many moles of hydrogen are present in 20g of 85% pure NaHCO3.

16. If the volume of closed vessel in which the following simple reaction is carried out is reduced to one third of original volume the rate of the reaction becomes 2NO + O2 - 2NO2 1. One third 2. Three times 3. Nine times 4. Twenty seven times

Meaning of free electrons

Those collisions which lead to the formation of products are called as:

White phosphorous reacts with Sodium Hydroxide solution and disproportionates into Sodium _ and _ gas.