46295 + Interview Questions in Chemistry

1.	Which of the following can be used to synthesize SO2 ?
Answer» Which of the following can be used to synthesize $S O_{2}$ ?

Discussion

2.	Acid catalysed hydration of alkenes give alcohol according to Markownikoff’s rule. Alcohols are also prepared from alkenes by oxy mercuration-de mercuration and hydro boration oxidation. (A) The compound (A) is:
Answer» Acid catalysed hydration of alkenes give alcohol according to Markownikoff’s rule. Alcohols are also prepared from alkenes by oxy mercuration-de mercuration and hydro boration oxidation. (A) The compound (A) is:

Discussion

3.	The value of vant hoff factor for K4[Fe(CN)6] if it is 20% ionised is
Answer» The value of vant hoff factor for K4[Fe(CN)6] if it is 20% ionised is

Discussion

4.	37. What is the Vapour pressure of an aq sol of urea 4.44 molal at 373k .
Answer» 37. What is the Vapour pressure of an aq sol of urea 4.44 molal at 373k .

Discussion

5.	Alkenes react with water in presence of a few drops of conc. sulphuric acid to form:
Answer» Alkenes react with water in presence of a few drops of conc. sulphuric acid to form:

Discussion

6.	The reagent which oxidise only aliphatic ketone is
Answer» The reagent which oxidise only aliphatic ketone is

Discussion

7.	1.00g of oxygen combine with 0.126g of hydrogen to form H2O.1.00g of nitrogen combine with 0.126g of hydrogen to form NH3.predict the weight of oxygen required to combine with 1.00g of nitrogen to form an oxide.
Answer» 1.00g of oxygen combine with 0.126g of hydrogen to form H2O.1.00g of nitrogen combine with 0.126g of hydrogen to form NH3.predict the weight of oxygen required to combine with 1.00g of nitrogen to form an oxide.

Discussion

8.	A radioactive sample decays through two different decay process α decay and β decay. Half-life time for α decay is 3 h and half-life for β decay is 6 h. what will be the ratio of the number of initial radioactive nuclei to the number of radioactive nuclei present after 6h?___
Answer» A radioactive sample decays through two different decay process α decay and $β$ decay. Half-life time for $α$ decay is 3 h and half-life for β decay is 6 h. what will be the ratio of the number of initial radioactive nuclei to the number of radioactive nuclei present after 6h?___

Discussion

9.	46.Energy of electron of He^+ ion in the 3rd orbit is (IE of H atom is 13.6eV)
Answer» 46.Energy of electron of He^+ ion in the 3rd orbit is (IE of H atom is 13.6eV)

Discussion

10.	45. The no of octahedral void in Bcc structure is 1)0 2)1 3)2 4)3
Answer» 45. The no of octahedral void in Bcc structure is 1)0 2)1 3)2 4)3

Discussion

11.	Which of the following depicts '+ve' overlapping?
Answer» Which of the following depicts '+ve' overlapping?

Discussion

12.	13. Pthalamide when reacts with (Br2+KOH ) in presence of H+ , what is the major product?
Answer» 13. Pthalamide when reacts with (Br2+KOH ) in presence of H+ , what is the major product?

Discussion

13.	why is the molecule is not participate in chemical reaction?
Answer» why is the molecule is not participate in chemical reaction?

Discussion

14.	How to identify whether which is the name C3H8O?
Answer» How to identify whether which is the name C3H8O?

Discussion

15.	21. What is the delta Heat of reaction for C(diamond) +O2(g)--->CO2(g)??
Answer» 21. What is the delta Heat of reaction for C(diamond) +O2(g)--->CO2(g)??

Discussion

16.	Which of the following solutions has the maximum pH value?
Answer» Which of the following solutions has the maximum pH value?

Discussion

17.	Three hydrogen atoms are replaced by chlorine atom from molecular formula C3H8The total number of structural isomers are obtained are
Answer» Three hydrogen atoms are replaced by chlorine atom from molecular formula $C_{3} H_{8}$ The total number of structural isomers are obtained are

Discussion

18.	Carbonates of alkali and alkaline earth metals differ in:
Answer» Carbonates of alkali and alkaline earth metals differ in:

Discussion

19.	19 Are monoatomic molecules like H2, O2, Cl2 compounds or elements
Answer» 19 Are monoatomic molecules like H2, O2, Cl2 compounds or elements

Discussion

20.	minimum % labelling of oleum
Answer» minimum % labelling of oleum

Discussion

21.	For a first order reaction A→ProductsThe concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of A is 0.01 M is:
Answer» For a first order reaction $A \to Products$ The concentration of A changes from $0.1 M$ to $0.025 M$ in 40 minutes. The rate of reaction when the concentration of A is $0.01 M$ is:

Discussion

22.	Find the relative formula mass of CaSO4?
Answer» Find the relative formula mass of $C a S O_{4}$ ?

Discussion

23.	A compound alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms occupy the corners of a cube, and the copper atoms occupy the centers of each of the faces of the cube. The formula of this compound is:
Answer» A compound alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms occupy the corners of a cube, and the copper atoms occupy the centers of each of the faces of the cube. The formula of this compound is:

Discussion

24.	The first member of the Balmer series of hydrogen atom has wavelength of 65630A. Calculate the wavelength and frequency of the second member of the same series . Given C=3×108ms−1
Answer» The first member of the Balmer series of hydrogen atom has wavelength of $6563 0 A$ . Calculate the wavelength and frequency of the second member of the same series . Given $C = 3 \times 10^{8} m s^{- 1}$

Discussion

25.	What is oxidation of food
Answer» What is oxidation of food

Discussion

26.	The major product in the following reaction
Answer» The major product in the following reaction

Discussion

27.	From a uniform square plate, one-fourth part isremoved as shown. The centre of mass ofremaining part will lie on4.2(1) OC(3) OB(2) OA(4) OD
Answer» From a uniform square plate, one-fourth part isremoved as shown. The centre of mass ofremaining part will lie on4.2(1) OC(3) OB(2) OA(4) OD

Discussion

28.	What mass of sodium hydroxide is dissolved in 295 g of a solution that is 12.0 % by mass NaOH ?
Answer» What mass of sodium hydroxide is dissolved in 295 g of a solution that is 12.0 % by mass NaOH ?

Discussion

29.	For a reactions, the equilibrium constant (K) values are given: A⇌B; K1=2B⇌C; K2=4C⇌D;K3=3Then calculate the equilibrium constant for the reaction A⇌D:
Answer» For a reactions, the equilibrium constant $(K)$ values are given: $A ⇌ B; K_{1} = 2 B ⇌ C; K_{2} = 4 C ⇌ D; K_{3} = 3$ Then calculate the equilibrium constant for the reaction $A ⇌ D$ :

Discussion

30.	What is nascent oxygen which is used in some reaction
Answer» What is nascent oxygen which is used in some reaction

Discussion

31.	16 MLD of water is flowing through a 2.5 km long pipe of diameter 45 cm. The chlorine at the rate of 32 kg/d is applied at the entry of this pipe so that disinfected water is obtained at the exit. There is a proposal to increase the flow through the pipe to 22 MLD from 16 MLD. Assume the dilution co-efficient n=1. The minimum amount of chlorine (in kg per day) to be applied to achieve the same degree of disinfection for the enhanced flow.
Answer» $16$ MLD of water is flowing through a $2.5 k m$ long pipe of diameter $45 c m$ . The chlorine at the rate of $32 k g / d$ is applied at the entry of this pipe so that disinfected water is obtained at the exit. There is a proposal to increase the flow through the pipe to $22$ MLD from $16$ MLD. Assume the dilution co-efficient $n = 1$ . The minimum amount of chlorine (in kg per day) to be applied to achieve the same degree of disinfection for the enhanced flow.

Discussion

32.	48. why CH3-Cl shows homolytic cleavage?
Answer» 48. why CH3-Cl shows homolytic cleavage?

Discussion

33.	35. Minimum distance between two tetrahedral voids if a is the edge length of the cube is (1) a/4 (2) a/2root2 (3) a/2 (4) root3a/4
Answer» 35. Minimum distance between two tetrahedral voids if a is the edge length of the cube is (1) a/4 (2) a/2root2 (3) a/2 (4) root3a/4

Discussion

34.	why is p of p called as plaster??What is a gypsum
Answer» why is p of p called as plaster??What is a gypsum

Discussion

35.	The compound that cannot act both as oxidising and reducing agent is :
Answer» The compound that cannot act both as oxidising and reducing agent is :

Discussion

36.	The crystalline solids have definite orderly arrangement of their constituent particles in three dimensions known as lattice. The smallest repeating part in the lattice is known as unit cell. The unit cell are described as simple cubic face centred and body centred unit cell. For the stable ionic crystalline structures, there is definite radius ratio limit for a cation to fit perfectly in the lattice of anions called radius ratio rule. This also defines the coordination number of an ion. (i) The number of atoms per unit cell in simple cubic (s), body centred (b) and face centred (f) unit cell decreases as:
Answer» The crystalline solids have definite orderly arrangement of their constituent particles in three dimensions known as lattice. The smallest repeating part in the lattice is known as unit cell. The unit cell are described as simple cubic face centred and body centred unit cell. For the stable ionic crystalline structures, there is definite radius ratio limit for a cation to fit perfectly in the lattice of anions called radius ratio rule. This also defines the coordination number of an ion. (i) The number of atoms per unit cell in simple cubic $(s)$ , body centred $(b)$ and face centred $(f)$ unit cell decreases as:

Discussion

37.	Which of the following(s) represent the correct order of boiling points?
Answer» Which of the following(s) represent the correct order of boiling points?

Discussion

38.	In which of the following structures the pair of starred carbon atom do not lie in the same plane?
Answer» In which of the following structures the pair of starred carbon atom do not lie in the same plane?

Discussion

39.	Predict the product C obtained in the following reaction of but-1-yne.CH3CH2−C≡CH+HCl→BHI−−→C
Answer» Predict the product C obtained in the following reaction of but-1-yne. $C H_{3} C H_{2} - C \equiv C H + H C l \to B H I - - \to C$

Discussion

40.	A solution of urea ( mol.mass 60 g/ mol) boils at 100.18 degrees at the atmospheric pressure . If Kf and Kb for water are 1.86 and 0.512 K Kg/mol respectively, the above solution will freeze at(1) -6.54 degrees (2) 6.54 degrees (3) 0.654 degrees (4) -0.654degrees
Answer» A solution of urea ( mol.mass 60 g/ mol) boils at 100.18 degrees at the atmospheric pressure . If Kf and Kb for water are 1.86 and 0.512 K Kg/mol respectively, the above solution will freeze at (1) -6.54 degrees (2) 6.54 degrees (3) 0.654 degrees (4) -0.654degrees

Discussion

41.	Statement-1 : Friedel-crafts reaction between benzene and acetic anhydride in the presence of anhydrous AlCl3 yields acetophenone and not poly substituted products.Statement-2 : Acetophenone formed, poisons the catalyst preventing further reaction.
Answer» Statement-1 : Friedel-crafts reaction between benzene and acetic anhydride in the presence of anhydrous $A l C l_{3}$ yields acetophenone and not poly substituted products. Statement-2 : Acetophenone formed, poisons the catalyst preventing further reaction.

Discussion

42.	Calculate the molarity and molality of 93% H2SO4 (weight/volume). Density of solution is 1.84g per ml
Answer» Calculate the molarity and molality of 93% H2SO4 (weight/volume). Density of solution is 1.84g per ml

Discussion

43.	how to draw resonating structures for azomethane
Answer» how to draw resonating structures for azomethane

Discussion

44.	An open flask containing air at 27 degrees Celsius. To what temperature it must be heated to expel one-fourth of the air.In open vessel cases we apply V-T formula but why here we can't apply it??
Answer» An open flask containing air at 27 degrees Celsius. To what temperature it must be heated to expel one-fourth of the air. In open vessel cases we apply V-T formula but why here we can't apply it??

Discussion

45.	Relation between CP and cv
Answer» Relation between CP and cv

Discussion

46.	What happens when copper sulphide is treated with dilute hydrochloric acid?
Answer» What happens when copper sulphide is treated with dilute hydrochloric acid?

Discussion

47.	Vapour density of mixture of NO2 and N2O4 is 34.5, then percentage abundance(by mol) of NO2 in mixture is__________1) 50%2)25%3)40%4)60%
Answer» Vapour density of mixture of NO2 and N2O4 is 34.5, then percentage abundance(by mol) of NO2 in mixture is__________ 1) 50% 2)25% 3)40% 4)60%

Discussion

48.	The sum of p orbitals involved in the hybridisation of NH3 and BF3 molecules are:
Answer» The sum of $p$ orbitals involved in the hybridisation of $N H_{3}$ and $B F_{3}$ molecules are:

Discussion

49.	benzaldehyde+HCOH \xrightarrow[{heat }]{KOH}
Answer» benzaldehyde+HCOH \xrightarrow[{heat }]{KOH}

Discussion

50.	Show the structure of 2-methoxypropane
Answer» Show the structure of 2-methoxypropane

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following can be used to synthesize SO2 ?

Acid catalysed hydration of alkenes give alcohol according to Markownikoff’s rule. Alcohols are also prepared from alkenes by oxy mercuration-de mercuration and hydro boration oxidation. (A) The compound (A) is:

The value of vant hoff factor for K4[Fe(CN)6] if it is 20% ionised is

37. What is the Vapour pressure of an aq sol of urea 4.44 molal at 373k .

Alkenes react with water in presence of a few drops of conc. sulphuric acid to form:

The reagent which oxidise only aliphatic ketone is

1.00g of oxygen combine with 0.126g of hydrogen to form H2O.1.00g of nitrogen combine with 0.126g of hydrogen to form NH3.predict the weight of oxygen required to combine with 1.00g of nitrogen to form an oxide.

A radioactive sample decays through two different decay process α decay and β decay. Half-life time for α decay is 3 h and half-life for β decay is 6 h. what will be the ratio of the number of initial radioactive nuclei to the number of radioactive nuclei present after 6h?___

46.Energy of electron of He^+ ion in the 3rd orbit is (IE of H atom is 13.6eV)

45. The no of octahedral void in Bcc structure is 1)0 2)1 3)2 4)3

Which of the following depicts '+ve' overlapping?

13. Pthalamide when reacts with (Br2+KOH ) in presence of H+ , what is the major product?

why is the molecule is not participate in chemical reaction?

How to identify whether which is the name C3H8O?

21. What is the delta Heat of reaction for C(diamond) +O2(g)--->CO2(g)??

Which of the following solutions has the maximum pH value?

Three hydrogen atoms are replaced by chlorine atom from molecular formula C3H8The total number of structural isomers are obtained are

Carbonates of alkali and alkaline earth metals differ in:

19 Are monoatomic molecules like H2, O2, Cl2 compounds or elements

minimum % labelling of oleum

For a first order reaction A→ProductsThe concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of A is 0.01 M is:

Find the relative formula mass of CaSO4?

A compound alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms occupy the corners of a cube, and the copper atoms occupy the centers of each of the faces of the cube. The formula of this compound is:

The first member of the Balmer series of hydrogen atom has wavelength of 65630A. Calculate the wavelength and frequency of the second member of the same series . Given C=3×108ms−1

What is oxidation of food

The major product in the following reaction

From a uniform square plate, one-fourth part isremoved as shown. The centre of mass ofremaining part will lie on4.2(1) OC(3) OB(2) OA(4) OD

What mass of sodium hydroxide is dissolved in 295 g of a solution that is 12.0 % by mass NaOH ?

For a reactions, the equilibrium constant (K) values are given: A⇌B; K1=2B⇌C; K2=4C⇌D;K3=3Then calculate the equilibrium constant for the reaction A⇌D:

What is nascent oxygen which is used in some reaction

48. why CH3-Cl shows homolytic cleavage?

35. Minimum distance between two tetrahedral voids if a is the edge length of the cube is (1) a/4 (2) a/2root2 (3) a/2 (4) root3a/4

why is p of p called as plaster??What is a gypsum

The compound that cannot act both as oxidising and reducing agent is :

Which of the following(s) represent the correct order of boiling points?

In which of the following structures the pair of starred carbon atom do not lie in the same plane?

Predict the product C obtained in the following reaction of but-1-yne.CH3CH2−C≡CH+HCl→BHI−−→C

A solution of urea ( mol.mass 60 g/ mol) boils at 100.18 degrees at the atmospheric pressure . If Kf and Kb for water are 1.86 and 0.512 K Kg/mol respectively, the above solution will freeze at(1) -6.54 degrees (2) 6.54 degrees (3) 0.654 degrees (4) -0.654degrees

Statement-1 : Friedel-crafts reaction between benzene and acetic anhydride in the presence of anhydrous AlCl3 yields acetophenone and not poly substituted products.Statement-2 : Acetophenone formed, poisons the catalyst preventing further reaction.

Calculate the molarity and molality of 93% H2SO4 (weight/volume). Density of solution is 1.84g per ml

how to draw resonating structures for azomethane

An open flask containing air at 27 degrees Celsius. To what temperature it must be heated to expel one-fourth of the air.In open vessel cases we apply V-T formula but why here we can't apply it??

Relation between CP and cv

What happens when copper sulphide is treated with dilute hydrochloric acid?

Vapour density of mixture of NO2 and N2O4 is 34.5, then percentage abundance(by mol) of NO2 in mixture is__________1) 50%2)25%3)40%4)60%

The sum of p orbitals involved in the hybridisation of NH3 and BF3 molecules are:

benzaldehyde+HCOH \xrightarrow[{heat }]{KOH}

Show the structure of 2-methoxypropane