46295 + Interview Questions in Chemistry

1.	A valid Lewis structure cannot be drawn for which of the following compounds? (P=15, Si=14, C=6,)
Answer» A valid Lewis structure cannot be drawn for which of the following compounds? $(P = 15, S i = 14, C = 6,)$

Discussion

2.	In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells
Answer» In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells

Discussion

3.	4. Give solution 1).how to calculate no.of atoms when mole are given 2).when density is given then how to get volume at NTP
Answer» 4. Give solution 1).how to calculate no.of atoms when mole are given 2).when density is given then how to get volume at NTP

Discussion

4.	32. How many geometrical isomers are possible for the following complexes [MA3BCD]; [MA2BCDE] ; and [MA2B2C2]
Answer» 32. How many geometrical isomers are possible for the following complexes [MA3BCD]; [MA2BCDE] ; and [MA2B2C2]

Discussion

5.	What is the Bond Order of SO2 and How many resonating structures are there for SO2?
Answer» What is the Bond Order of SO2 and How many resonating structures are there for SO2?

Discussion

6.	P is the probability of finding a 1s electron of hydrogen atom in a spherical shell of infinitesimal thickness, dr, at a distance r from the nucleus. The volume of this shell is 4πr2dr. The qualitative sketch of the dependence of P on r is
Answer» P is the probability of finding a 1s electron of hydrogen atom in a spherical shell of infinitesimal thickness, dr, at a distance r from the nucleus. The volume of this shell is $4 π r^{2} d r$ . The qualitative sketch of the dependence of P on r is

Discussion

7.	The solubility product of PbI2 is 7.2×10−9. Calculate the maximum mass of NaI, which may be added in 500 mL of 0.005 M Pb(NO3)2 solution without any precipitation of PbI2(Atomic weight of Na=23 u, I=127 u)
Answer» The solubility product of $P b I_{2}$ is $7.2 \times 10^{- 9}$ . Calculate the maximum mass of $N a I$ , which may be added in $500 mL$ of $0.005 M$ $P b (N O_{3})_{2}$ solution without any precipitation of $P b I_{2}$ (Atomic weight of $N a = 23 u, I = 127 u$ )

Discussion

8.	a cylinder contains S02 gas at a pressure of 4.1 atmosphere and 47 c temperature . the density of gas in the cylinder is
Answer» a cylinder contains S02 gas at a pressure of 4.1 atmosphere and 47 c temperature . the density of gas in the cylinder is

Discussion

9.	At 300 K, the half life of a sample of a gaseous compound initially at 1 atm is 100 sec. When the initial pressure at same temperature is 0.5 atm the half life is 50 sec, the order of the reaction is x. What is the value of x?
Answer» At 300 K, the half life of a sample of a gaseous compound initially at 1 atm is 100 sec. When the initial pressure at same temperature is 0.5 atm the half life is 50 sec, the order of the reaction is x. What is the value of x?

Discussion

10.	With excess of HI or PI3 , 1, 2 - ethanediol gives
Answer» With excess of HI or PI₃ , 1, 2 - ethanediol gives

Discussion

11.	36. A solution is found to contain same concentration of MgCl2 and acetic acid .Assume that in the mixture MgC l2 is dissociated 50 % while acetic acid is 50 % associated . Calculate the value of i.
Answer» 36. A solution is found to contain same concentration of MgCl2 and acetic acid .Assume that in the mixture MgC l2 is dissociated 50 % while acetic acid is 50 % associated . Calculate the value of i.

Discussion

12.	The structure of thiosulphuric acid is:
Answer» The structure of thiosulphuric acid is:

Discussion

13.	what is methyl ethyl
Answer» what is methyl ethyl

Discussion

14.	The pH of a solution at 25^° C which has twice as many hydroxide ion as in pure water at 25^° C will be (1)14 (2)9 (3)6.699 (4)7.30
Answer» The pH of a solution at 25^° C which has twice as many hydroxide ion as in pure water at 25^° C will be (1)14 (2)9 (3)6.699 (4)7.30

Discussion

15.	11. In a crystalline solid anions y are arranged in CCP arrangement cations x are equally distributed between tetrahedral and octahedral voids. if all the octahedral voids are occupied what is the formula of solid?
Answer» 11. In a crystalline solid anions y are arranged in CCP arrangement cations x are equally distributed between tetrahedral and octahedral voids. if all the octahedral voids are occupied what is the formula of solid?

Discussion

16.	What is the difference between the terms 'hydrolysis' and 'hydration'?
Answer» What is the difference between the terms 'hydrolysis' and 'hydration'?

Discussion

17.	7. Which group has more +R effect -methoxy group or hydroxyl group?
Answer» 7. Which group has more +R effect -methoxy group or hydroxyl group?

Discussion

18.	Which of the following is non-electrolyte?
Answer» Which of the following is non-electrolyte?

Discussion

19.	0.5 moles of gas A and X moles of gas B exert a pressure of 200 Pa in a container of volume 10 m3 at 1000 K. Given R is the gas constant having the units JK−1mol−1. X is :
Answer» $0.5$ moles of gas $A$ and $X$ moles of gas $B$ exert a pressure of $200 P a$ in a container of volume $10 m^{3}$ at $1000 K$ . Given $R$ is the gas constant having the units $J K^{-} 1 m o l^{-} 1$ . $X$ is :

Discussion

20.	Osmtic pressure of solution containing 0.6 g ureaand 3.42 g sugar in 100 ml at 27^° C(1) 492 atm(3) 49.2 atm(2) 4.92 atm(4) 28.1 atm
Answer» Osmtic pressure of solution containing 0.6 g ureaand 3.42 g sugar in 100 ml at 27^° C(1) 492 atm(3) 49.2 atm(2) 4.92 atm(4) 28.1 atm

Discussion

21.	Two solutions, A and B when taken separately in the same conductivity cell had a resistance of 40 ohm and 60 ohm respectively. If equal volumes of both the solutions are mixed and then the resistance of the mixture will be (Assume that there is no increase in the degree of dissociation of A and B on mixing)
Answer» Two solutions, A and B when taken separately in the same conductivity cell had a resistance of 40 ohm and 60 ohm respectively. If equal volumes of both the solutions are mixed and then the resistance of the mixture will be (Assume that there is no increase in the degree of dissociation of A and B on mixing)

Discussion

22.	Which of the following is correct relation between radius of octahedral void (r) and radius of atom (R) in closed packed structure?
Answer» Which of the following is correct relation between radius of octahedral void (r) and radius of atom (R) in closed packed structure?

Discussion

23.	The Product Q would be:
Answer» The Product Q would be:

Discussion

24.	The electronic configuration of halogen is
Answer» The electronic configuration of halogen is

Discussion

25.	How to find the valency of polyatomic ions like: CO3, PO4 etc
Answer» How to find the valency of polyatomic ions like: CO3, PO4 etc

Discussion

26.	What will be the central atom of AlCl3?
Answer» What will be the central atom of $A l C l_{3}$ ?

Discussion

27.	How does H2O2 behave as a bleaching agent ?
Answer» How does H2O2 behave as a bleaching agent ?

Discussion

28.	Whathappens when D-glucose is treated with the following reagents?(i) HI (ii) Bromine water (iii) HNO3
Answer» What happens when D-glucose is treated with the following reagents? (i) HI (ii) Bromine water (iii) HNO₃

28.

Whathappens when D-glucose is treated with the following reagents?(i) HI (ii) Bromine water (iii) HNO3

Answer»

What
happens when D-glucose is treated with the following reagents?

(i)
HI (ii)
Bromine water (iii)
HNO₃

Discussion

29.	10. If A Atoms are present at corners of unit cell and b at alternate face centre then what is formuale AB of the compound
Answer» 10. If A Atoms are present at corners of unit cell and b at alternate face centre then what is formuale AB of the compound

Discussion

30.	An f-shell containing 6 unpaired electrons can exchange
Answer» An f-shell containing 6 unpaired electrons can exchange

Discussion

31.	Out of ch3cook and ch3cooh which is more acidic and why?
Answer» Out of ch3cook and ch3cooh which is more acidic and why?

Discussion

32.	Why is the lone pair on nitrogen in pyridine is not part of the aromatic ring but in pyrrole ring it is
Answer» Why is the lone pair on nitrogen in pyridine is not part of the aromatic ring but in pyrrole ring it is

Discussion

33.	isopentane + cl2 in sunlight major product of the reaction is
Answer» isopentane + cl2 in sunlight major product of the reaction is

Discussion

34.	In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:
Answer» In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:

Discussion

35.	Which of the following can show geometrical isomerism?
Answer» Which of the following can show geometrical isomerism?

Discussion

36.	Number of radial nodes and angular nodes in 4d orbital
Answer» Number of radial nodes and angular nodes in 4d orbital

Discussion

37.	Why Benzophenone does not give Cannizzaro reaction? Aldol condensation product of 1 -Phenyl propanone
Answer» Why Benzophenone does not give Cannizzaro reaction? Aldol condensation product of 1 -Phenyl propanone

Discussion

38.	"Ethanol is burnt in presence of air." Explain and write the chemical reaction.
Answer» "Ethanol is burnt in presence of air." Explain and write the chemical reaction.

Discussion

39.	The potential energy u of a particle varies with distance x from a fixed origin as u=Arootx÷x+B, where A and B are constants . The dimensions of A and B are respectively .
Answer» The potential energy u of a particle varies with distance x from a fixed origin as u=Arootx÷x+B, where A and B are constants . The dimensions of A and B are respectively .

Discussion

40.	8. Are calcination and roasting reduction processes
Answer» 8. Are calcination and roasting reduction processes

Discussion

41.	Which of the following element is not detected by Lassaigne’s test?
Answer» Which of the following element is not detected by Lassaigne’s test?

Discussion

42.	2 4 g of graphite is burnt in a bomb calorimeter of heat capacity 30kJ/K in excess of oxygen at 1 atm pressure.The temperature rises from 300 K TO 304 K. What is the enthalpy of combustion of graphite(in kJ/mol) ?
Answer» 2 4 g of graphite is burnt in a bomb calorimeter of heat capacity 30kJ/K in excess of oxygen at 1 atm pressure.The temperature rises from 300 K TO 304 K. What is the enthalpy of combustion of graphite(in kJ/mol) ?

Discussion

43.	In a hydrogen like atom, an electron is revolving in an orbit having quantum number n. Its frequency of revolution is found to be 1.32×1015 Hz. Energy required to completely remove this electron to infinity from the above orbit of atom is 54.4 eV. In a time interval of 7 nanoseconds the electron jumps back to orbits having quantum number n/2. If the average torque acting on the electron during the above process is τ Nm, then find the value of τ×1027 (given hπ=2.1×10−34 J-s,) frequency of revolution of electron in the ground state of H-atom =6.6×1015 Hz_______
Answer» In a hydrogen like atom, an electron is revolving in an orbit having quantum number $n$ . Its frequency of revolution is found to be $1.32 \times 10^{15} Hz .$ Energy required to completely remove this electron to infinity from the above orbit of atom is $54.4 eV$ . In a time interval of $7$ nanoseconds the electron jumps back to orbits having quantum number $n / 2.$ If the average torque acting on the electron during the above process is $τ Nm,$ then find the value of $τ \times 10^{27}$ (given $\frac{h}{π} = 2.1 \times 10^{- 34} J-s,$ ) frequency of revolution of electron in the ground state of H-atom $= 6.6 \times 10^{15} Hz$ _______

Discussion

44.	Which of the following sequence will convert 3-phenylbutanenitrile to 3-phenylbutan-1-ol?1 – workup2 – H2O,H+,Δ3 – reduction with LiAlH4
Answer» Which of the following sequence will convert 3-phenylbutanenitrile to 3-phenylbutan-1-ol? 1 – workup 2 – $H_{2} O, H^{+}, Δ$ 3 – reduction with $L i A l H_{4}$

44.

Which of the following sequence will convert 3-phenylbutanenitrile to 3-phenylbutan-1-ol?1 – workup2 – H2O,H+,Δ3 – reduction with LiAlH4

Answer»

Which of the following sequence will convert 3-phenylbutanenitrile to 3-phenylbutan-1-ol?

1 – workup

2 – $H_{2} O, H^{+}, Δ$

3 – reduction with $L i A l H_{4}$

Discussion

45.	Reaction between NaOH and alkyne
Answer» Reaction between NaOH and alkyne

Discussion

46.	Acetone is the major product in: I) H3C−CH=CH2H+/H2O−−−−−→ II) H3C−C≡CHHg2+/H2SO4 (aq.)−−−−−−−−−−−→ II) H3C−C≡CHBH3, THF−−−−−−−→H2O2/OH−
Answer» Acetone is the major product in: $I) H_{3} C - C H = C H_{2} H^{+} / H_{2} O - ---- \to$ $I I) H_{3} C - C \equiv C H H g^{2 +} / H_{2} S O_{4} (a q .) - ---------- \to$ $I I) H_{3} C - C \equiv C H B H_{3}, T H F - ------ \to H_{2} O_{2} / O H^{-}$

Discussion

47.	What is the acid radical and basic radical of K2Cr2O7
Answer» What is the acid radical and basic radical of K2Cr2O7

Discussion

48.	The absolute configuration at the two chiral centres in D- ribulose are
Answer» The absolute configuration at the two chiral centres in D- ribulose are

Discussion

49.	The reaction of C6H5CH=CHCH3 with HBr produces :
Answer» The reaction of $C_{6} H_{5} C H = C H C H_{3}$ with $H B r$ produces :

Discussion

50.	Which among the following elements will have a positive electron gain enthalpy?
Answer» Which among the following elements will have a positive electron gain enthalpy?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A valid Lewis structure cannot be drawn for which of the following compounds? (P=15, Si=14, C=6,)

In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells

4. Give solution 1).how to calculate no.of atoms when mole are given 2).when density is given then how to get volume at NTP

32. How many geometrical isomers are possible for the following complexes [MA3BCD]; [MA2BCDE] ; and [MA2B2C2]

What is the Bond Order of SO2 and How many resonating structures are there for SO2?

P is the probability of finding a 1s electron of hydrogen atom in a spherical shell of infinitesimal thickness, dr, at a distance r from the nucleus. The volume of this shell is 4πr2dr. The qualitative sketch of the dependence of P on r is

The solubility product of PbI2 is 7.2×10−9. Calculate the maximum mass of NaI, which may be added in 500 mL of 0.005 M Pb(NO3)2 solution without any precipitation of PbI2(Atomic weight of Na=23 u, I=127 u)

a cylinder contains S02 gas at a pressure of 4.1 atmosphere and 47 c temperature . the density of gas in the cylinder is

At 300 K, the half life of a sample of a gaseous compound initially at 1 atm is 100 sec. When the initial pressure at same temperature is 0.5 atm the half life is 50 sec, the order of the reaction is x. What is the value of x?

With excess of HI or PI3 , 1, 2 - ethanediol gives

36. A solution is found to contain same concentration of MgCl2 and acetic acid .Assume that in the mixture MgC l2 is dissociated 50 % while acetic acid is 50 % associated . Calculate the value of i.

The structure of thiosulphuric acid is:

what is methyl ethyl

The pH of a solution at 25^° C which has twice as many hydroxide ion as in pure water at 25^° C will be (1)14 (2)9 (3)6.699 (4)7.30

11. In a crystalline solid anions y are arranged in CCP arrangement cations x are equally distributed between tetrahedral and octahedral voids. if all the octahedral voids are occupied what is the formula of solid?

What is the difference between the terms 'hydrolysis' and 'hydration'?

7. Which group has more +R effect -methoxy group or hydroxyl group?

Which of the following is non-electrolyte?

0.5 moles of gas A and X moles of gas B exert a pressure of 200 Pa in a container of volume 10 m3 at 1000 K. Given R is the gas constant having the units JK−1mol−1. X is :

Osmtic pressure of solution containing 0.6 g ureaand 3.42 g sugar in 100 ml at 27^° C(1) 492 atm(3) 49.2 atm(2) 4.92 atm(4) 28.1 atm

Which of the following is correct relation between radius of octahedral void (r) and radius of atom (R) in closed packed structure?

The Product Q would be:

The electronic configuration of halogen is

How to find the valency of polyatomic ions like: CO3, PO4 etc

What will be the central atom of AlCl3?

How does H2O2 behave as a bleaching agent ?

Whathappens when D-glucose is treated with the following reagents?(i) HI (ii) Bromine water (iii) HNO3

10. If A Atoms are present at corners of unit cell and b at alternate face centre then what is formuale AB of the compound

An f-shell containing 6 unpaired electrons can exchange

Out of ch3cook and ch3cooh which is more acidic and why?

Why is the lone pair on nitrogen in pyridine is not part of the aromatic ring but in pyrrole ring it is

isopentane + cl2 in sunlight major product of the reaction is

In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:

Which of the following can show geometrical isomerism?

Number of radial nodes and angular nodes in 4d orbital

Why Benzophenone does not give Cannizzaro reaction? Aldol condensation product of 1 -Phenyl propanone

"Ethanol is burnt in presence of air." Explain and write the chemical reaction.

The potential energy u of a particle varies with distance x from a fixed origin as u=Arootx÷x+B, where A and B are constants . The dimensions of A and B are respectively .

8. Are calcination and roasting reduction processes

Which of the following element is not detected by Lassaigne’s test?

2 4 g of graphite is burnt in a bomb calorimeter of heat capacity 30kJ/K in excess of oxygen at 1 atm pressure.The temperature rises from 300 K TO 304 K. What is the enthalpy of combustion of graphite(in kJ/mol) ?

Which of the following sequence will convert 3-phenylbutanenitrile to 3-phenylbutan-1-ol?1 – workup2 – H2O,H+,Δ3 – reduction with LiAlH4

Reaction between NaOH and alkyne

Acetone is the major product in: I) H3C−CH=CH2H+/H2O−−−−−→ II) H3C−C≡CHHg2+/H2SO4 (aq.)−−−−−−−−−−−→ II) H3C−C≡CHBH3, THF−−−−−−−→H2O2/OH−

What is the acid radical and basic radical of K2Cr2O7

The absolute configuration at the two chiral centres in D- ribulose are

The reaction of C6H5CH=CHCH3 with HBr produces :

Which among the following elements will have a positive electron gain enthalpy?