46295 + Interview Questions in Chemistry

1.	38. The freezing and normal boiling points of benzene are 278.5 k and 353 k respectively. Delta Hf = 10.67 KJ per lol Amount of solidified benzene is A) 1.31g B) 13.1g C) 0.134g D) 12.14g
Answer» 38. The freezing and normal boiling points of benzene are 278.5 k and 353 k respectively. Delta Hf = 10.67 KJ per lol Amount of solidified benzene is A) 1.31g B) 13.1g C) 0.134g D) 12.14g

Discussion

2.	According to Graham's law, at a given temperature, the ratio of the rates of diffusion rArB of gases A and B is given by: (where P and M are pressures and molecular weights of gases A and B respectively)
Answer» According to Graham's law, at a given temperature, the ratio of the rates of diffusion $\frac{r_{A}}{r_{B}}$ of gases $A$ and $B$ is given by: (where $P$ and $M$ are pressures and molecular weights of gases $A$ and $B$ respectively)

Discussion

3.	39 Starting with 100 mm (Hg) pressure of SO2Cl2 in a closed container, the following equillibrium is set up at some temperature : SO2Cl2 (g) SO2 (g) + Cl2 (g). if mole fraction of SO2Cl2 at equillibrium is 1/3, Kp for the reaction is : (a) 25 mm (b) 50 mm (c) 100 mm (d) 150 mm
Answer» 39 Starting with 100 mm (Hg) pressure of SO2Cl2 in a closed container, the following equillibrium is set up at some temperature : SO2Cl2 (g) SO2 (g) + Cl2 (g). if mole fraction of SO2Cl2 at equillibrium is 1/3, Kp for the reaction is : (a) 25 mm (b) 50 mm (c) 100 mm (d) 150 mm

Discussion

4.	why is entropy maximum at equilibrium?
Answer» why is entropy maximum at equilibrium?

Discussion

5.	In the reaction sequence:The molar mass (g) of the major product Y is .
Answer» In the reaction sequence: The molar mass (g) of the major product Y is .

Discussion

6.	In a cubic lattice if the atoms are present in all corners and alternate face centres then the packing efficiency of the unit cell is?
Answer» In a cubic lattice if the atoms are present in all corners and alternate face centres then the packing efficiency of the unit cell is?

Discussion

7.	Identify the reaction given below:NaOH + D2O → NaOD + HDO.
Answer» Identify the reaction given below: NaOH + $D_{2}$ O $\to$ NaOD + HDO.

7.

Identify the reaction given below:NaOH + D2O → NaOD + HDO.

Answer»

Identify the reaction given below:

NaOH + $D_{2}$ O

$\to$ NaOD + HDO.

Discussion

8.	molecular mass
Answer» molecular mass

Discussion

9.	An n-p-n transistor in a common emitter mode is used as a simple voltage amplifier as shown in figure. Calculate the value of RB. [Given: β=100]
Answer» An $n-p-n$ transistor in a common emitter mode is used as a simple voltage amplifier as shown in figure. Calculate the value of $R_{B}$ . [Given: $β = 100$ ]

Discussion

10.	Explain on the basis ofvalence bond theory that [Ni(CN)4]2− ion with squareplanar structure isdiamagnetic and the [NiCl4]2−ion with tetrahedral geometry is paramagnetic.
Answer» Explain on the basis of valence bond theory that [Ni(CN)₄]²⁻ ion with square planar structure is diamagnetic and the [NiCl₄]²⁻ ion with tetrahedral geometry is paramagnetic.

10.

Explain on the basis ofvalence bond theory that [Ni(CN)4]2− ion with squareplanar structure isdiamagnetic and the [NiCl4]2−ion with tetrahedral geometry is paramagnetic.

Answer»

Explain on the basis of
valence bond theory that [Ni(CN)₄]²⁻
ion with square

planar structure is
diamagnetic and the [NiCl₄]²⁻
ion with tetrahedral geometry is paramagnetic.

Discussion

11.	Select the correct diagram for an endothermic reaction that proceeds through two steps, where the second step is rate determining:
Answer» Select the correct diagram for an endothermic reaction that proceeds through two steps, where the second step is rate determining:

Discussion

12.	Attraction of water molecules to polar surfaces is called
Answer» Attraction of water molecules to polar surfaces is called

Discussion

13.	The solubility of a salt of weak acid (AB) at pH 3 is Y×10^{-3} mol L^{-1} . The valcue of Y is__________. (Given that the value of solubility product of AB (K_{sp}) =2×10^{-10} and the value of ionization cons†an t of HB (K_a) =1×10^{-8_{}}
Answer» The solubility of a salt of weak acid (AB) at pH 3 is Y×10^{-3} mol L^{-1} . The valcue of Y is__________. (Given that the value of solubility product of AB (K_{sp}) =2×10^{-10} and the value of ionization cons†an t of HB (K_a) =1×10^{-8_{}}

Discussion

14.	The organic chloro compound, which shows maximum reactivity towards SN2 reaction, is
Answer» The organic chloro compound, which shows maximum reactivity towards ${S_{N}}^{2}$ reaction, is

Discussion

15.	What are analgesics?
Answer» What are analgesics?

Discussion

16.	In the nomenclature of coordination compounds if both the cation and anion are coordination entities and both have central atom ion then it is necessary that they should have same charge or they can have different charge also?
Answer» In the nomenclature of coordination compounds if both the cation and anion are coordination entities and both have central atom ion then it is necessary that they should have same charge or they can have different charge also?

Discussion

17.	the first four ionisation energy values of an element are 191,578,872 and 5962 kcal. the no. of valence electron in the element is 1. 1 2. 23. 34. 4
Answer» the first four ionisation energy values of an element are 191,578,872 and 5962 kcal. the no. of valence electron in the element is 1. 1 2. 2 3. 3 4. 4

Discussion

18.	1,1.5,3,7.5,_
Answer» 1,1.5,3,7.5,_

Discussion

19.	If radius of second orbit is X then de broglie wavelenghth in 4th orbit is 8 pi x 2pi x 4 pi x 6 pi x
Answer» If radius of second orbit is X then de broglie wavelenghth in 4th orbit is 8 pi x 2pi x 4 pi x 6 pi x

Discussion

20.	The value of Kc for the reaction 3O2(g)↔2O3(g) is 2.0×10–50at25∘C. If the equilibrium concentration of O2 in air at 25∘C is 1.6×10−2, what is the concentration of O3?
Answer» The value of Kc for the reaction $3 O_{2} (g) \leftrightarrow 2 O_{3} (g)$ is $2.0 \times 10^{- 50} a t 25^{\circ} C$ . If the equilibrium concentration of $O_{2}$ in air at $25^{\circ} C$ is $1.6 \times 10^{- 2}$ , what is the concentration of $O_{3}$ ?

20.

The value of Kc for the reaction 3O2(g)↔2O3(g) is 2.0×10–50at25∘C. If the equilibrium concentration of O2 in air at 25∘C is 1.6×10−2, what is the concentration of O3?

Answer»

The value of Kc for the reaction $3 O_{2} (g) \leftrightarrow 2 O_{3} (g)$ is $2.0 \times 10^{- 50} a t 25^{\circ} C$ . If the equilibrium concentration of $O_{2}$ in air at $25^{\circ} C$ is $1.6 \times 10^{- 2}$ , what is the concentration of $O_{3}$ ?

Discussion

21.	Identify the isotactic polypropylene from the following:
Answer» Identify the isotactic polypropylene from the following:

Discussion

22.	If 72×10^-5J of work is done to increase the radius from 2cm to 3cm. What is the surface tension of the bubble
Answer» If 72×10^-5J of work is done to increase the radius from 2cm to 3cm. What is the surface tension of the bubble

Discussion

23.	For the equilibrium N2O4(g)⇌2NO2(g), mark the correct option that shows the correct relationship of the degree of dissociation - ′α′ with D/d; where D is vapour density of N2O4 and d is vapour density of equilibrium mixture.
Answer» For the equilibrium $N_{2} O_{4} (g) ⇌ 2 N O_{2} (g)$ , mark the correct option that shows the correct relationship of the degree of dissociation - $^{'} α^{'}$ with $D / d$ ; where $D$ is vapour density of $N_{2} O_{4}$ and $d$ is vapour density of equilibrium mixture.

Discussion

24.	Why a p orbital is left unhybridised in sp2d hybridisation?
Answer» Why a p orbital is left unhybridised in sp2d hybridisation?

Discussion

25.	What is p-block , s - block, in periodic table??
Answer» What is p-block , s - block, in periodic table??

Discussion

26.	When chloroform is treated with amine and KOH, we get[CPMT 1979]
Answer» When chloroform is treated with amine and KOH, we get [CPMT 1979]

26.

When chloroform is treated with amine and KOH, we get[CPMT 1979]

Answer»

When chloroform is treated with amine and KOH, we get

[CPMT 1979]

Discussion

27.	35.Which one of the following orders correctly represents the increasing acid strengths of given acid HOClO3 HOClO2 HOClO HOCl
Answer» 35.Which one of the following orders correctly represents the increasing acid strengths of given acid HOClO3 HOClO2 HOClO HOCl

Discussion

28.	The shape of the complex[Ag(NH3)2]^+
Answer» The shape of the complex[Ag(NH3)2]^+

Discussion

29.	In the following reaction, how is the rate of appearance of bromine related to the rate of disappearance of bromide?BrO−3(aq)+5Br−(aq)+6H+(aq)→3Br2(l)+3H2O(l)
Answer» In the following reaction, how is the rate of appearance of bromine related to the rate of disappearance of bromide? $B r O_{3 (a q)}^{-} + 5 B r_{(a q)}^{-} + 6 H_{(a q)}^{+} \to 3 B r_{2 (l)} + 3 H_{2} O_{(l)}$

Discussion

30.	47. If Zn2+/An electrode is diluted 1000 times then the change in electrode potential is 1. Increase of 29.5 mV 2. Increase of 59 mV 3. Decrease of 88.5 mV 4. Decrease of 91.1 mV.
Answer» 47. If Zn2+/An electrode is diluted 1000 times then the change in electrode potential is 1. Increase of 29.5 mV 2. Increase of 59 mV 3. Decrease of 88.5 mV 4. Decrease of 91.1 mV.

Discussion

31.	In a thermodynamic process two moles of amonatomic ideal gas obeys P directly proportional to V^{-2}. If temperature of the gas increases from 300 K to 400 K, then findwork done by the gas (where R = universal gas constant)
Answer» In a thermodynamic process two moles of amonatomic ideal gas obeys P directly proportional to V^{-2}. If temperature of the gas increases from 300 K to 400 K, then findwork done by the gas (where R = universal gas constant)

Discussion

32.	A 20.0mL sample of CuSO4 solution Was evaporated to dryness, leaving 0.967 g of residue. What was the molarity of original solution? (cu= 66.5)
Answer» A 20.0mL sample of CuSO4 solution Was evaporated to dryness, leaving 0.967 g of residue. What was the molarity of original solution? (cu= 66.5)

Discussion

33.	The total number of isomers of C4H7Br A 12 B 19 C 17 D 20 How to find Du
Answer» The total number of isomers of C4H7Br A 12 B 19 C 17 D 20 How to find Du

Discussion

34.	What is the difference between peptides and peptones?
Answer» What is the difference between peptides and peptones?

Discussion

35.	How many main energy level max can an atom have and as 4 main energy level have 4 sublevels s p d f is 5th main energy level has 5 sublevels if yes what are they
Answer» How many main energy level max can an atom have and as 4 main energy level have 4 sublevels s p d f is 5th main energy level has 5 sublevels if yes what are they

Discussion

36.	how does N has +5 oxidation state in HNO3?
Answer» how does N has +5 oxidation state in HNO3?

Discussion

37.	I read the definition of light year as the distance travelled by light in free space in one year is called light year. Is this correct or not?
Answer» I read the definition of light year as the distance travelled by light in free space in one year is called light year. Is this correct or not?

Discussion

38.	The standard enthalpy of formation of N2O and NO are 28 kJ mol−1 and 90 kJ mol−1 respectively. The enthalpy change of the reaction, 2N2O(g)+O2(g)→4NO(g) is equal to:
Answer» The standard enthalpy of formation of $N_{2} O$ and $N O$ are $28 {kJ mol}^{- 1}$ and $90 {kJ mol}^{- 1}$ respectively. The enthalpy change of the reaction, $2 N_{2} O (g) + O_{2} (g) \to 4 N O (g)$ is equal to:

Discussion

39.	Is the function 3x+17 increasing or strictly increasing onR
Answer» Is the function 3x+17 increasing or strictly increasing onR

Discussion

40.	If benzene is treated with (ch3co)2o in presence of AlCl3 'X' is formed. Now X reacts with Zn-Hg/HCl to form Y . If Y reacts with NBS what will be the product ?
Answer» If benzene is treated with (ch3co)2o in presence of AlCl3 'X' is formed. Now X reacts with Zn-Hg/HCl to form Y . If Y reacts with NBS what will be the product ?

Discussion

41.	Why (CH3)3CCH3Cl does not follow SN2 mechanism ?
Answer» Why (CH₃)₃CCH₃Cl does not follow SN² mechanism ?

Discussion

42.	What is the positive and negative deviation of Raoult's law ?
Answer» What is the positive and negative deviation of Raoult's law ?

Discussion

43.	CH3−COOH→CH3COCl Here the reagent is __________.
Answer» $C H_{3} - C O O H \to C H_{3} C O C l$ Here the reagent is __________.

Discussion

44.	what is jahn teller distortion?
Answer» what is jahn teller distortion?

Discussion

45.	The temperature coefficient for the saponification of ethyl acetate by NaOH is 1.75 when the temperatures rises from 25oC to 35oC. Calculate activation energy for the saponification of ethyl acetate.Take,log10(1.75)=0.243
Answer» The temperature coefficient for the saponification of ethyl acetate by $N a O H$ is 1.75 when the temperatures rises from $25^{o} C$ to $35^{o} C$ . Calculate activation energy for the saponification of ethyl acetate. Take, ${log}_{10} (1.75) = 0.243$

Discussion

46.	Which is more stable methoxy methyl carbocation or tertiary butyl carbocation
Answer» Which is more stable methoxy methyl carbocation or tertiary butyl carbocation

Discussion

47.	Choose the correct relation on the basis of bohr's theory.
Answer» Choose the correct relation on the basis of bohr's theory.

Discussion

48.	29. 1 mole of A,1.5 mole of B and 2 mole of C are taken in a vessel of volume 1 Litre. At equilibrium conc of C is 0.5 mole/L.Equilibrium constant for the reaction A(g)+B(g)=C(g) is?
Answer» 29. 1 mole of A,1.5 mole of B and 2 mole of C are taken in a vessel of volume 1 Litre. At equilibrium conc of C is 0.5 mole/L.Equilibrium constant for the reaction A(g)+B(g)=C(g) is?

Discussion

49.	How many grams of Cr are deposited in the electrolysis of a solution of Cr(NO3)3 in the same time that it takes to deposit 0.54 g of Ag in a silver coulometer arranged in series with the Cr(NO3)3 cell?(Given your answe upto two decimal)(Atomic weight: Cr=52.0 u; Ag=108 u)
Answer» How many grams of $C r$ are deposited in the electrolysis of a solution of $C r (N O_{3})_{3}$ in the same time that it takes to deposit $0.54 g$ of $A g$ in a silver coulometer arranged in series with the $C r (N O_{3})_{3}$ cell? (Given your answe upto two decimal) (Atomic weight: $C r = 52.0 u; A g = 108 u$ )

Discussion

50.	What is effect of alkoxy group on acidic strength of carboxylic acid?
Answer» What is effect of alkoxy group on acidic strength of carboxylic acid?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

38. The freezing and normal boiling points of benzene are 278.5 k and 353 k respectively. Delta Hf = 10.67 KJ per lol Amount of solidified benzene is A) 1.31g B) 13.1g C) 0.134g D) 12.14g

According to Graham's law, at a given temperature, the ratio of the rates of diffusion rArB of gases A and B is given by: (where P and M are pressures and molecular weights of gases A and B respectively)

39 Starting with 100 mm (Hg) pressure of SO2Cl2 in a closed container, the following equillibrium is set up at some temperature : SO2Cl2 (g) SO2 (g) + Cl2 (g). if mole fraction of SO2Cl2 at equillibrium is 1/3, Kp for the reaction is : (a) 25 mm (b) 50 mm (c) 100 mm (d) 150 mm

why is entropy maximum at equilibrium?

In the reaction sequence:The molar mass (g) of the major product Y is .

In a cubic lattice if the atoms are present in all corners and alternate face centres then the packing efficiency of the unit cell is?

Identify the reaction given below:NaOH + D2O → NaOD + HDO.

molecular mass

An n-p-n transistor in a common emitter mode is used as a simple voltage amplifier as shown in figure. Calculate the value of RB. [Given: β=100]

Explain on the basis ofvalence bond theory that [Ni(CN)4]2− ion with squareplanar structure isdiamagnetic and the [NiCl4]2−ion with tetrahedral geometry is paramagnetic.

Select the correct diagram for an endothermic reaction that proceeds through two steps, where the second step is rate determining:

Attraction of water molecules to polar surfaces is called

The solubility of a salt of weak acid (AB) at pH 3 is Y×10^{-3} mol L^{-1} . The valcue of Y is__________. (Given that the value of solubility product of AB (K_{sp}) =2×10^{-10} and the value of ionization cons†an t of HB (K_a) =1×10^{-8_{}}

The organic chloro compound, which shows maximum reactivity towards SN2 reaction, is

What are analgesics?

In the nomenclature of coordination compounds if both the cation and anion are coordination entities and both have central atom ion then it is necessary that they should have same charge or they can have different charge also?

the first four ionisation energy values of an element are 191,578,872 and 5962 kcal. the no. of valence electron in the element is 1. 1 2. 23. 34. 4

1,1.5,3,7.5,_

If radius of second orbit is X then de broglie wavelenghth in 4th orbit is 8 pi x 2pi x 4 pi x 6 pi x

The value of Kc for the reaction 3O2(g)↔2O3(g) is 2.0×10–50at25∘C. If the equilibrium concentration of O2 in air at 25∘C is 1.6×10−2, what is the concentration of O3?

Identify the isotactic polypropylene from the following:

If 72×10^-5J of work is done to increase the radius from 2cm to 3cm. What is the surface tension of the bubble

For the equilibrium N2O4(g)⇌2NO2(g), mark the correct option that shows the correct relationship of the degree of dissociation - ′α′ with D/d; where D is vapour density of N2O4 and d is vapour density of equilibrium mixture.

Why a p orbital is left unhybridised in sp2d hybridisation?

What is p-block , s - block, in periodic table??

When chloroform is treated with amine and KOH, we get[CPMT 1979]

35.Which one of the following orders correctly represents the increasing acid strengths of given acid HOClO3 HOClO2 HOClO HOCl

The shape of the complex[Ag(NH3)2]^+

In the following reaction, how is the rate of appearance of bromine related to the rate of disappearance of bromide?BrO−3(aq)+5Br−(aq)+6H+(aq)→3Br2(l)+3H2O(l)

47. If Zn2+/An electrode is diluted 1000 times then the change in electrode potential is 1. Increase of 29.5 mV 2. Increase of 59 mV 3. Decrease of 88.5 mV 4. Decrease of 91.1 mV.

In a thermodynamic process two moles of amonatomic ideal gas obeys P directly proportional to V^{-2}. If temperature of the gas increases from 300 K to 400 K, then findwork done by the gas (where R = universal gas constant)

A 20.0mL sample of CuSO4 solution Was evaporated to dryness, leaving 0.967 g of residue. What was the molarity of original solution? (cu= 66.5)

The total number of isomers of C4H7Br A 12 B 19 C 17 D 20 How to find Du

What is the difference between peptides and peptones?

How many main energy level max can an atom have and as 4 main energy level have 4 sublevels s p d f is 5th main energy level has 5 sublevels if yes what are they

how does N has +5 oxidation state in HNO3?

I read the definition of light year as the distance travelled by light in free space in one year is called light year. Is this correct or not?

The standard enthalpy of formation of N2O and NO are 28 kJ mol−1 and 90 kJ mol−1 respectively. The enthalpy change of the reaction, 2N2O(g)+O2(g)→4NO(g) is equal to:

Is the function 3x+17 increasing or strictly increasing onR

If benzene is treated with (ch3co)2o in presence of AlCl3 'X' is formed. Now X reacts with Zn-Hg/HCl to form Y . If Y reacts with NBS what will be the product ?

Why (CH3)3CCH3Cl does not follow SN2 mechanism ?

What is the positive and negative deviation of Raoult's law ?

CH3−COOH→CH3COCl Here the reagent is __________.

what is jahn teller distortion?

The temperature coefficient for the saponification of ethyl acetate by NaOH is 1.75 when the temperatures rises from 25oC to 35oC. Calculate activation energy for the saponification of ethyl acetate.Take,log10(1.75)=0.243

Which is more stable methoxy methyl carbocation or tertiary butyl carbocation

Choose the correct relation on the basis of bohr's theory.

29. 1 mole of A,1.5 mole of B and 2 mole of C are taken in a vessel of volume 1 Litre. At equilibrium conc of C is 0.5 mole/L.Equilibrium constant for the reaction A(g)+B(g)=C(g) is?

How many grams of Cr are deposited in the electrolysis of a solution of Cr(NO3)3 in the same time that it takes to deposit 0.54 g of Ag in a silver coulometer arranged in series with the Cr(NO3)3 cell?(Given your answe upto two decimal)(Atomic weight: Cr=52.0 u; Ag=108 u)

What is effect of alkoxy group on acidic strength of carboxylic acid?