46295 + Interview Questions in Chemistry

1.	Which one of the following properties of an element can never be variable?
Answer» Which one of the following properties of an element can never be variable?

Discussion

2.	calculate the number of electrons in 1.6 g CH4 molecule
Answer» calculate the number of electrons in 1.6 g CH4 molecule

Discussion

3.	What are fullerenes ? Name the most common fullerene.
Answer» What are fullerenes ? Name the most common fullerene.

Discussion

4.	When mono brominationn of n-butane occurs at 130∘C, the product formed is:
Answer» When mono brominationn of n-butane occurs at $130^{\circ} C$ , the product formed is:

Discussion

5.	29 In the reaction of sodium thiosulphate with I2 in aqueous medium the equivalent weight of sodium thiosulphate is equal to 1) Molar mass of sodium thiosulphate 2) the average of molar masses of Na2S2O3 and I2 3) half the molar mass of sodium thiosulphate 4) molar mass of sodium thiosulphate 2
Answer» 29 In the reaction of sodium thiosulphate with I2 in aqueous medium the equivalent weight of sodium thiosulphate is equal to 1) Molar mass of sodium thiosulphate 2) the average of molar masses of Na2S2O3 and I2 3) half the molar mass of sodium thiosulphate 4) molar mass of sodium thiosulphate 2

Discussion

6.	Calculate the hydrolytic constant of urea hydrochloride salt. Given: Kb(urea)=1.5×10−14 M.
Answer» Calculate the hydrolytic constant of urea hydrochloride salt. Given: $K_{b} (urea) = 1.5 \times 10^{- 14} M$ .

Discussion

7.	What are differences between internal energy and enthalpy?
Answer» What are differences between internal energy and enthalpy?

Discussion

8.	25 Tungsten crystalises in bcc lattice.Calculate the number of unit cells in 1.5g of tungsten.(Atomic mass of tungsten=184u)
Answer» 25 Tungsten crystalises in bcc lattice.Calculate the number of unit cells in 1.5g of tungsten.(Atomic mass of tungsten=184u)

Discussion

9.	92.Is there any antidote for N2O. If there is then what is the equation?
Answer» 92.Is there any antidote for N2O. If there is then what is the equation?

Discussion

10.	Expert why do the reactions of primary and secondary alcohol with HCl require the presence of catalyst set ZnCl2 while tertiary alcohol react with HCl at room temperature by simply shaking it.
Answer» Expert why do the reactions of primary and secondary alcohol with HCl require the presence of catalyst set ZnCl2 while tertiary alcohol react with HCl at room temperature by simply shaking it.

Discussion

11.	2. The enthalpy of neutrilization of acetic acid and sodium hydroxide is -55.4 kJ. What is the enthalpy if ionization of acetic acid
Answer» 2. The enthalpy of neutrilization of acetic acid and sodium hydroxide is -55.4 kJ. What is the enthalpy if ionization of acetic acid

Discussion

12.	The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in acidic solution is
Answer» The number of moles of $K M n O_{4}$ that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

Discussion

13.	Which of the following ether will always give SN_2 mechanism in acidic as well as basic conditions ?
Answer» Which of the following ether will always give SN_2 mechanism in acidic as well as basic conditions ?

Discussion

14.	Is momentum a vector or a scalar?
Answer» Is momentum a vector or a scalar?

Discussion

15.	How is gypsum used in agriculture?
Answer» How is gypsum used in agriculture?

Discussion

16.	What is the oxidation number of Manganese in permanganate ion (MnO4–)?
Answer» What is the oxidation number of Manganese in permanganate ion $(M n O 4^{-})$ ?

Discussion

17.	The reaction: CH3CH2I+KOHaq→CH3CH2OH+KI is classified as : (a) electrophilic substitution (b) nucleophilic substitution (c) elimination (d) addition
Answer» The reaction: $C H_{3} C H_{2} I + K O H_{a q} \to C H_{3} C H_{2} O H + K I$ is classified as : (a) electrophilic substitution (b) nucleophilic substitution (c) elimination (d) addition

Discussion

18.	The compound that will react most readily with NaOH to form methanol is
Answer» The compound that will react most readily with NaOH to form methanol is

Discussion

19.	One litre of CO_{2 }is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. What is the composition of products?
Answer» One litre of CO_{2 }is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. What is the composition of products?

Discussion

20.	Question 20 An object starting from rest travels 20 m in first 2 s and 160 m in next 4 s. What will be the velocity after 7 s from the start?
Answer» Question 20 An object starting from rest travels 20 m in first 2 s and 160 m in next 4 s. What will be the velocity after 7 s from the start?

Discussion

21.	What is formula to find electric potential
Answer» What is formula to find electric potential

Discussion

22.	43. What happens when aniline reacts with concentrated hcl
Answer» 43. What happens when aniline reacts with concentrated hcl

Discussion

23.	6. On increasing temperature and decreasing pressure in caesium chloride solid 1) coordination number of metal Ion increases from 6 to 8 2) number of formula unit per unit cell changes from 1 to 4 3) density of unit cell is increased 4) radius ratio is increased
Answer» 6. On increasing temperature and decreasing pressure in caesium chloride solid 1) coordination number of metal Ion increases from 6 to 8 2) number of formula unit per unit cell changes from 1 to 4 3) density of unit cell is increased 4) radius ratio is increased

Discussion

24.	In an experiment, 4g of H2 reacts with 32g of O2 to produce 36g of H2O. Calculate the amount of O2 required to react with 12g of H2 to produce 108g of H2O.
Answer» In an experiment, $4 g$ of $H_{2}$ reacts with $32 g$ of $O_{2}$ to produce $36 g$ of $H_{2} O$ . Calculate the amount of $O_{2}$ required to react with $12 g$ of $H_{2}$ to produce $108 g$ of $H_{2} O$ .

Discussion

25.	43. The total number of electrons in 2.0 g of D2O to that in 1.8 g of H2O?
Answer» 43. The total number of electrons in 2.0 g of D2O to that in 1.8 g of H2O?

Discussion

26.	Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable?
Answer» Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable?

Discussion

27.	work out the reaction when 1chloro 3,3 dimethyl bu†an e reacts with alc. KOH.
Answer» work out the reaction when 1chloro 3,3 dimethyl bu†an e reacts with alc. KOH.

Discussion

28.	Oxidation state of S in Na2S2O5
Answer» Oxidation state of S in Na2S2O5

Discussion

29.	5. In group 15 elements why basicity of hydrides decreases down the group?
Answer» 5. In group 15 elements why basicity of hydrides decreases down the group?

Discussion

30.	What is luminous intensity and formula for it
Answer» What is luminous intensity and formula for it

Discussion

31.	The hybridization of Cr' in the complex\lbrack Cr(NO2)4(NH3)21 is(1) sp3de(3) d2spIS(2) sp3d(4) sp
Answer» The hybridization of Cr' in the complex\lbrack Cr(NO2)4(NH3)21 is(1) sp3de(3) d2spIS(2) sp3d(4) sp

Discussion

32.	what is extended pauling scale of electronegativity?
Answer» what is extended pauling scale of electronegativity?

Discussion

33.	Give four uses of emulsions.
Answer» Give four uses of emulsions.

Discussion

34.	Aniline in a set of the following reactions yielded a coloured product ‘Y’.Compound Y is:
Answer» Aniline in a set of the following reactions yielded a coloured product ‘Y’.Compound Y is:

Discussion

35.	BF3 is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :
Answer» $B F_{3}$ is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :

Discussion

36.	phosphoric acid is preferred over sulphuric acid in preparing hydrogen peroxide from peroxides.why?refer exemplar problem
Answer» phosphoric acid is preferred over sulphuric acid in preparing hydrogen peroxide from peroxides.why? refer exemplar problem

Discussion

37.	What is the significance of molecular orbitals theory?
Answer» What is the significance of molecular orbitals theory?

Discussion

38.	When a sulphur atom becomes a sulphide ion
Answer» When a sulphur atom becomes a sulphide ion

Discussion

39.	Why nylon threads are used for making fishing nets?
Answer» Why nylon threads are used for making fishing nets?

Discussion

40.	Find empirical formula of 4g calcium , 6.022 × 10^{23} atoms carbon, 4.8 g oxygen
Answer» Find empirical formula of 4g calcium , 6.022 × 10^{23} atoms carbon, 4.8 g oxygen

Discussion

41.	The energy gap of silicon is 1.14eV. What is the MINIMUM wavelength at which silicon will begin absorbing energy?
Answer» The energy gap of silicon is 1.14eV. What is the MINIMUM wavelength at which silicon will begin absorbing energy?

Discussion

42.	29.2% (w/w) HCl stock solution has s density of 1.25 g mL−1. The molecular weight of HCl is 36.5 g mol−1. the volume (mL) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is
Answer» $29.2 % (w / w) H C l$ stock solution has s density of $1.25 g m L^{- 1}$ . The molecular weight of $H C l i s 36.5 g m o l^{- 1}$ . the volume $(m L)$ of stock solution required to prepare a $200 m L$ solution of $0.4 M H C l$ is

Discussion

43.	What would be the probable product(s) of the above reaction?
Answer» What would be the probable product(s) of the above reaction?

Discussion

44.	Which state of Be3+ has the same orbit radius as that of the ground state of hydrogen atom?
Answer» Which state of $B e^{3 +}$ has the same orbit radius as that of the ground state of hydrogen atom?

Discussion

45.	74. industrial waste water sample is found to contain 8.3% sodium phosphate and 12% magnesium sulphate weight by weight if percent of ionization of sodium phosphate and magnesium sulphate is 50 and 60 respectively calculate boiling point of solution
Answer» 74. industrial waste water sample is found to contain 8.3% sodium phosphate and 12% magnesium sulphate weight by weight if percent of ionization of sodium phosphate and magnesium sulphate is 50 and 60 respectively calculate boiling point of solution

Discussion

46.	If g(x)=x2+x−1 and gof(x)=4x2−10x+5, then the value of 2f(54)+4 is equal to
Answer» If $g (x) = x^{2} + x - 1$ and $g o f (x) = 4 x^{2} - 10 x + 5,$ then the value of $2 f (\frac{5}{4}) + 4$ is equal to

Discussion

47.	The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0 = 510 nT. What is the amplitude of the electric field part of the wave?
Answer» The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B₀ = 510 nT. What is the amplitude of the electric field part of the wave?

Discussion

48.	1 mole of PCl_5 taken at 5atm, dissociates into PCl_3 and Cl_2to the extent of 50% Thus, K_{p }is: (1) 2.5 (2) 1.67 (3) 0.5 (4) 2.0
Answer» 1 mole of PCl_5 taken at 5atm, dissociates into PCl_3 and Cl_2to the extent of 50% Thus, K_{p }is: (1) 2.5 (2) 1.67 (3) 0.5 (4) 2.0

Discussion

49.	what is seral and climax community?
Answer» what is seral and climax community?

Discussion

50.	If L and R denote the induc†an ce and resis†an ce , then the dimensional formula for L/R is same as that of
Answer» If L and R denote the induc†an ce and resis†an ce , then the dimensional formula for L/R is same as that of

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which one of the following properties of an element can never be variable?

calculate the number of electrons in 1.6 g CH4 molecule

What are fullerenes ? Name the most common fullerene.

When mono brominationn of n-butane occurs at 130∘C, the product formed is:

29 In the reaction of sodium thiosulphate with I2 in aqueous medium the equivalent weight of sodium thiosulphate is equal to 1) Molar mass of sodium thiosulphate 2) the average of molar masses of Na2S2O3 and I2 3) half the molar mass of sodium thiosulphate 4) molar mass of sodium thiosulphate 2

Calculate the hydrolytic constant of urea hydrochloride salt. Given: Kb(urea)=1.5×10−14 M.

What are differences between internal energy and enthalpy?

25 Tungsten crystalises in bcc lattice.Calculate the number of unit cells in 1.5g of tungsten.(Atomic mass of tungsten=184u)

92.Is there any antidote for N2O. If there is then what is the equation?

Expert why do the reactions of primary and secondary alcohol with HCl require the presence of catalyst set ZnCl2 while tertiary alcohol react with HCl at room temperature by simply shaking it.

2. The enthalpy of neutrilization of acetic acid and sodium hydroxide is -55.4 kJ. What is the enthalpy if ionization of acetic acid

The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

Which of the following ether will always give SN_2 mechanism in acidic as well as basic conditions ?

Is momentum a vector or a scalar?

How is gypsum used in agriculture?

What is the oxidation number of Manganese in permanganate ion (MnO4–)?

The reaction: CH3CH2I+KOHaq→CH3CH2OH+KI is classified as : (a) electrophilic substitution (b) nucleophilic substitution (c) elimination (d) addition

The compound that will react most readily with NaOH to form methanol is

One litre of CO_{2 }is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. What is the composition of products?

Question 20 An object starting from rest travels 20 m in first 2 s and 160 m in next 4 s. What will be the velocity after 7 s from the start?

What is formula to find electric potential

43. What happens when aniline reacts with concentrated hcl

6. On increasing temperature and decreasing pressure in caesium chloride solid 1) coordination number of metal Ion increases from 6 to 8 2) number of formula unit per unit cell changes from 1 to 4 3) density of unit cell is increased 4) radius ratio is increased

In an experiment, 4g of H2 reacts with 32g of O2 to produce 36g of H2O. Calculate the amount of O2 required to react with 12g of H2 to produce 108g of H2O.

43. The total number of electrons in 2.0 g of D2O to that in 1.8 g of H2O?

Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable?

work out the reaction when 1chloro 3,3 dimethyl bu†an e reacts with alc. KOH.

Oxidation state of S in Na2S2O5

5. In group 15 elements why basicity of hydrides decreases down the group?

What is luminous intensity and formula for it

The hybridization of Cr' in the complex\lbrack Cr(NO2)4(NH3)21 is(1) sp3de(3) d2spIS(2) sp3d(4) sp

what is extended pauling scale of electronegativity?

Give four uses of emulsions.

Aniline in a set of the following reactions yielded a coloured product ‘Y’.Compound Y is:

BF3 is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :

phosphoric acid is preferred over sulphuric acid in preparing hydrogen peroxide from peroxides.why?refer exemplar problem

What is the significance of molecular orbitals theory?

When a sulphur atom becomes a sulphide ion

Why nylon threads are used for making fishing nets?

Find empirical formula of 4g calcium , 6.022 × 10^{23} atoms carbon, 4.8 g oxygen

The energy gap of silicon is 1.14eV. What is the MINIMUM wavelength at which silicon will begin absorbing energy?

29.2% (w/w) HCl stock solution has s density of 1.25 g mL−1. The molecular weight of HCl is 36.5 g mol−1. the volume (mL) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is

What would be the probable product(s) of the above reaction?

Which state of Be3+ has the same orbit radius as that of the ground state of hydrogen atom?

74. industrial waste water sample is found to contain 8.3% sodium phosphate and 12% magnesium sulphate weight by weight if percent of ionization of sodium phosphate and magnesium sulphate is 50 and 60 respectively calculate boiling point of solution

If g(x)=x2+x−1 and gof(x)=4x2−10x+5, then the value of 2f(54)+4 is equal to

The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0 = 510 nT. What is the amplitude of the electric field part of the wave?

1 mole of PCl_5 taken at 5atm, dissociates into PCl_3 and Cl_2to the extent of 50% Thus, K_{p }is: (1) 2.5 (2) 1.67 (3) 0.5 (4) 2.0

what is seral and climax community?

If L and R denote the induc†an ce and resis†an ce , then the dimensional formula for L/R is same as that of