46295 + Interview Questions in Chemistry

1.	Isomers have essentially identical ___
Answer» Isomers have essentially identical ___

Discussion

2.	Prove that path of projectile is parabolic?
Answer» Prove that path of projectile is parabolic?

Discussion

3.	What are the steps involved in halogenation of alkanes?
Answer» What are the steps involved in halogenation of alkanes?

Discussion

4.	Which complex will form when silver bromide is treated with solution of sodium thiosulphate ?
Answer» Which complex will form when silver bromide is treated with solution of sodium thiosulphate ?

Discussion

5.	A car tire is filled with nitrogen gas at 35 psi and 27∘C. It will burst if pressure exceeds 40 psi. The temperature in ∘C at which the car tyre will burst is ______. (Rounded off to the nearest integer)
Answer» A car tire is filled with nitrogen gas at $35 p s i$ and $27^{\circ} C .$ It will burst if pressure exceeds $40 p s i .$ The temperature in $^{\circ} C$ at which the car tyre will burst is ______. (Rounded off to the nearest integer)

Discussion

6.	How much energy is required to ionise a H atom if the electron occupies n = 5 orbit? Compare your answer with the ionization enthalpy of H atom (energy required to remove the electron from n =1 orbit).
Answer» How much energy is required to ionise a H atom if the electron occupies n = 5 orbit? Compare your answer with the ionization enthalpy of H atom (energy required to remove the electron from n =1 orbit).

Discussion

7.	how to write an induvidual force in terms of unit vector
Answer» how to write an induvidual force in terms of unit vector

Discussion

8.	Why can't we tell Trihydroxypropane [Glycerol] as Propane-1,2,3-triol ? As by IUPAC Nomenclature this can be a valid name .
Answer» Why can't we tell Trihydroxypropane [Glycerol] as Propane-1,2,3-triol ? As by IUPAC Nomenclature this can be a valid name .

Discussion

9.	27. What is the (approx) molarity of 1.5 molal of H2SO3 solution? (density of solution = 0.75 g/cc) (Molecular mass of H2SO3 = 82) (1) 0.5 M (2) 1 M (3) 1.5 M (4) 2 M
Answer» 27. What is the (approx) molarity of 1.5 molal of H2SO3 solution? (density of solution = 0.75 g/cc) (Molecular mass of H2SO3 = 82) (1) 0.5 M (2) 1 M (3) 1.5 M (4) 2 M

Discussion

10.	How many gram-atom of O and Al are present in 51grams of Al2O3
Answer» How many gram-atom of O and Al are present in 51grams of Al2O3

Discussion

11.	Recently discovered micro organisms capable of metabolising chlorinated hydrocarbons possess
Answer» Recently discovered micro organisms capable of metabolising chlorinated hydrocarbons possess

Discussion

12.	when alkaline react with ammonia is a chemical property or physical property
Answer» when alkaline react with ammonia is a chemical property or physical property

Discussion

13.	26 Convert benzene into the following structures: (I) p-nitrobromo benzene (II) m- nitrochloro benzene (III) p- nitro toluene (IV) acetophenone
Answer» 26 Convert benzene into the following structures: (I) p-nitrobromo benzene (II) m- nitrochloro benzene (III) p- nitro toluene (IV) acetophenone

Discussion

14.	50. What is ionisation enthalpy.
Answer» 50. What is ionisation enthalpy.

Discussion

15.	A 140 W heater was placed in 2.00 kg of methanol (CH3OH) and turned on for exactly 2 min. The temperature increased by 4.24 K. Assuming that all the heat is absorbed by methanol, then molar heat capacity of methanol is
Answer» A $140 W$ heater was placed in $2.00 k g$ of methanol $(C H_{3} O H)$ and turned on for exactly 2 min. The temperature increased by $4.24 K$ . Assuming that all the heat is absorbed by methanol, then molar heat capacity of methanol is

Discussion

16.	The valence shell electronic configuration of Cr2+ ion is
Answer» The valence shell electronic configuration of $C r^{2 +}$ ion is

Discussion

17.	How many atoms are there in 2 moles of X atom?
Answer» How many atoms are there in 2 moles of X atom?

Discussion

18.	Figure out the R - S nomenclature for the following compound. Type R or S as your answer.___
Answer» Figure out the R - S nomenclature for the following compound. Type R or S as your answer.___

Discussion

19.	1 Ferrous sulphate on heating gives:- 1)SO2 and SO3 2)SO2 only 3)SO3 only 4)H2S only
Answer» 1 Ferrous sulphate on heating gives:- 1)SO2 and SO3 2)SO2 only 3)SO3 only 4)H2S only

Discussion

20.	The correct statement regarding F - centre is
Answer» The correct statement regarding F - centre is

Discussion

21.	The compound which undergoes SN1 reaction most rapidly is:
Answer» The compound which undergoes $S_{N} 1$ reaction most rapidly is:

Discussion

22.	An element (atomic mass = 100 g/mol) that has a bcc structure has a unit cell edge length of 400 pm. The density of the element is: (Take NA=6×1023)
Answer» An element (atomic mass = 100 g/mol) that has a bcc structure has a unit cell edge length of 400 pm. The density of the element is: (Take $N_{A} = 6 \times 10^{23}$ )

Discussion

23.	What is integral of 1/x dx upper limit=3 lower limit =2?
Answer» What is integral of 1/x dx upper limit=3 lower limit =2?

Discussion

24.	Energy of a photon with a wave length of 450 nm is
Answer» Energy of a photon with a wave length of $450 n m$ is

Discussion

25.	In Haber's process of preparation on NH3, iron and molybdenum are added. They role of each is
Answer» In Haber's process of preparation on NH₃, iron and molybdenum are added. They role of each is

Discussion

26.	When molten sulphur is suddenly cooled by pouring it into water, we get
Answer» When molten sulphur is suddenly cooled by pouring it into water, we get

Discussion

27.	A first order reaction has a specific reaction rate 10−2 sec−1. How much time will it take for 20 g of the reactant to reduce to 5 g?
Answer» A first order reaction has a specific reaction rate $10^{- 2} {sec}^{- 1}$ . How much time will it take for $20 g$ of the reactant to reduce to $5 g$ ?

Discussion

28.	At 473 K, equilibrium constant Kc for decomposition of phosphorus pentachloride, PCl5 is 8.3 ×10-3. If decomposition is depicted as, ΔrH° = 124.0 kJmol–1a) Write an expression for Kc for the reaction.b) What is the value of Kc for the reverse reaction at the same temperature?c) What would be the effect on Kc if (i) more PCl5 is added (ii) pressure is increased? (iii) The temperature is increased?
Answer» At 473 K, equilibrium constant K_c for decomposition of phosphorus pentachloride, PCl₅ is 8.3 ×10^-3. If decomposition is depicted as, Δ_rH° = 124.0 kJmol^–1 a) Write an expression for K_cfor the reaction. b) What is the value of K_c for the reverse reaction at the same temperature? c) What would be the effect on K_c if (i) more PCl₅ is added (ii) pressure is increased? (iii) The temperature is increased?

28.

At 473 K, equilibrium constant Kc for decomposition of phosphorus pentachloride, PCl5 is 8.3 ×10-3. If decomposition is depicted as, ΔrH° = 124.0 kJmol–1a) Write an expression for Kc for the reaction.b) What is the value of Kc for the reverse reaction at the same temperature?c) What would be the effect on Kc if (i) more PCl5 is added (ii) pressure is increased? (iii) The temperature is increased?

Answer»

At 473 K, equilibrium constant K_c for decomposition of phosphorus pentachloride, PCl₅ is 8.3 ×10^-3. If decomposition is depicted as,

Δ_rH° = 124.0 kJmol^–1

a) Write an expression for K_cfor the reaction.

b) What is the value of K_c for the reverse reaction at the same temperature?

c) What would be the effect on K_c if (i) more PCl₅ is added (ii) pressure is increased? (iii) The temperature is increased?

Discussion

29.	Which among the following is the strongest acid?
Answer» Which among the following is the strongest acid?

Discussion

30.	44. Which of the following allotrope of P has tetrahedral discrete unit? 1.red black P 2.white P 3.red P 4.red black and white P
Answer» 44. Which of the following allotrope of P has tetrahedral discrete unit? 1.red black P 2.white P 3.red P 4.red black and white P

Discussion

31.	The ionisation energy of an electron in the lowest orbit of hydrogen atom is 13.6 eV. What are the energies required in eV to remove electron from 3 lowest orbits of hydrogen atom ??
Answer» The ionisation energy of an electron in the lowest orbit of hydrogen atom is 13.6 eV. What are the energies required in eV to remove electron from 3 lowest orbits of hydrogen atom ??

Discussion

32.	10. rate constant of first order reaction is 0.0693per minute . calculate the percentage of reaction remaining at the end of the 60 minute.(with detail solution )
Answer» 10. rate constant of first order reaction is 0.0693per minute . calculate the percentage of reaction remaining at the end of the 60 minute.(with detail solution )

Discussion

33.	What is the number of carbon atoms present in 22 gram carbon dioxide?
Answer» What is the number of carbon atoms present in 22 gram carbon dioxide?

Discussion

34.	How many moles of calcium hydroxide must be dissolved to produce 250.0 ml of an aqueous solution of pH 10.65 ? Assume complete dissociation. Given 10−3.35=4.47×10−4
Answer» How many moles of calcium hydroxide must be dissolved to produce 250.0 ml of an aqueous solution of pH 10.65 ? Assume complete dissociation. Given $10^{- 3.35} = 4.47 \times 10^{- 4}$

Discussion

35.	10.What are the products formed when alkyene reacts in the presence of H2/pd/CaCO3.
Answer» 10.What are the products formed when alkyene reacts in the presence of H2/pd/CaCO3.

Discussion

36.	Which one among the following is the most acidic?
Answer» Which one among the following is the most acidic?

Discussion

37.	Calculate the free energy change for the dissociation of potassium nitrate in water at 298K. (given: delta H = 34 KJ/mol, delta S = 0.116KJ/K/mol)
Answer» Calculate the free energy change for the dissociation of potassium nitrate in water at 298K. (given: delta H = 34 KJ/mol, delta S = 0.116KJ/K/mol)

Discussion

38.	The average distance travelled by the molecule between successive collision is called _____.
Answer» The average distance travelled by the molecule between successive collision is called _____.

Discussion

39.	Two elements X and Y have atomic mass 75 and 16 respectively. They combine to give a compound having 75.8% X. The empirical formula of the compound is:
Answer» Two elements $X$ and $Y$ have atomic mass $75$ and $16$ respectively. They combine to give a compound having $75.8 %$ $X$ . The empirical formula of the compound is:

Discussion

40.	Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight :
Answer» Which of the following is not formed by the reaction of $C l_{2}$ on $C H_{4}$ in sunlight :

Discussion

41.	How many dichloro products (including stereoisomers) are possible in the given reaction?
Answer» How many dichloro products (including stereoisomers) are possible in the given reaction?

Discussion

42.	Two copper wires have their masses in the ratio of 2 : 3 and their lengths in the ratio 3 : 4. What is the ratio of their resis†an ce? (a) 4 : 9 (b) 16 : 81 (c) 27 : 32 (d) 2 :1.
Answer» Two copper wires have their masses in the ratio of 2 : 3 and their lengths in the ratio 3 : 4. What is the ratio of their resis†an ce? (a) 4 : 9 (b) 16 : 81 (c) 27 : 32 (d) 2 :1.

Discussion

43.	12. A molecule having molecular formula c8h18 can show only one monobromo derivatives . Find its structural formula
Answer» 12. A molecule having molecular formula c8h18 can show only one monobromo derivatives . Find its structural formula

Discussion

44.	In the given radioactive disintegration series, 23592U→20782Pb Calculate the difference between the number of α and β particles emitted in this series.
Answer» In the given radioactive disintegration series, $_{92}^{235} U \to_{82}^{207} P b$ Calculate the difference between the number of $α$ and $β$ particles emitted in this series.

Discussion

45.	The IUPAC name of NC − CH2 − CH\|CN−CH2−CN is?
Answer» The IUPAC name of $N C - C H_{2} - C H \| C N - C H_{2} - C N$ is?

Discussion

46.	t-butylamine is a
Answer» t-butylamine is a

Discussion

47.	Calculate the concentration of CO2 in a soft drink that is bottled with a partial pressure of 4 atm over the liquid at 25∘C. The Henry's law constant for CO2 in water at 25∘C is 3.1×10−2 atm mol−1L
Answer» Calculate the concentration of $C O_{2}$ in a soft drink that is bottled with a partial pressure of 4 atm over the liquid at $25^{\circ} C$ . The Henry's law constant for $C O_{2}$ in water at $25^{\circ} C$ is $3.1 \times 10^{- 2} a t m m o l^{- 1} L$

Discussion

48.	pH of 10^-7 M HClO4
Answer» pH of 10^-7 M HClO4

Discussion

49.	Calculate the number of moles of KMnO4 that will be neded to react completely with one mole of ferrous oxalate Fe(C2O4) in acidic solution is:
Answer» Calculate the number of moles of $K M n O_{4}$ that will be neded to react completely with one mole of ferrous oxalate $F e (C_{2} O_{4})$ in acidic solution is:

Discussion

50.	y=e^5x+2 .find dy/dx
Answer» y=e^5x+2 .find dy/dx

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Isomers have essentially identical ___

Prove that path of projectile is parabolic?

What are the steps involved in halogenation of alkanes?

Which complex will form when silver bromide is treated with solution of sodium thiosulphate ?

A car tire is filled with nitrogen gas at 35 psi and 27∘C. It will burst if pressure exceeds 40 psi. The temperature in ∘C at which the car tyre will burst is ______. (Rounded off to the nearest integer)

How much energy is required to ionise a H atom if the electron occupies n = 5 orbit? Compare your answer with the ionization enthalpy of H atom (energy required to remove the electron from n =1 orbit).

how to write an induvidual force in terms of unit vector

Why can't we tell Trihydroxypropane [Glycerol] as Propane-1,2,3-triol ? As by IUPAC Nomenclature this can be a valid name .

27. What is the (approx) molarity of 1.5 molal of H2SO3 solution? (density of solution = 0.75 g/cc) (Molecular mass of H2SO3 = 82) (1) 0.5 M (2) 1 M (3) 1.5 M (4) 2 M

How many gram-atom of O and Al are present in 51grams of Al2O3

Recently discovered micro organisms capable of metabolising chlorinated hydrocarbons possess

when alkaline react with ammonia is a chemical property or physical property

26 Convert benzene into the following structures: (I) p-nitrobromo benzene (II) m- nitrochloro benzene (III) p- nitro toluene (IV) acetophenone

50. What is ionisation enthalpy.

A 140 W heater was placed in 2.00 kg of methanol (CH3OH) and turned on for exactly 2 min. The temperature increased by 4.24 K. Assuming that all the heat is absorbed by methanol, then molar heat capacity of methanol is

The valence shell electronic configuration of Cr2+ ion is

How many atoms are there in 2 moles of X atom?

Figure out the R - S nomenclature for the following compound. Type R or S as your answer.___

1 Ferrous sulphate on heating gives:- 1)SO2 and SO3 2)SO2 only 3)SO3 only 4)H2S only

The correct statement regarding F - centre is

The compound which undergoes SN1 reaction most rapidly is:

An element (atomic mass = 100 g/mol) that has a bcc structure has a unit cell edge length of 400 pm. The density of the element is: (Take NA=6×1023)

What is integral of 1/x dx upper limit=3 lower limit =2?

Energy of a photon with a wave length of 450 nm is

In Haber's process of preparation on NH3, iron and molybdenum are added. They role of each is

When molten sulphur is suddenly cooled by pouring it into water, we get

A first order reaction has a specific reaction rate 10−2 sec−1. How much time will it take for 20 g of the reactant to reduce to 5 g?

Which among the following is the strongest acid?

44. Which of the following allotrope of P has tetrahedral discrete unit? 1.red black P 2.white P 3.red P 4.red black and white P

The ionisation energy of an electron in the lowest orbit of hydrogen atom is 13.6 eV. What are the energies required in eV to remove electron from 3 lowest orbits of hydrogen atom ??

10. rate constant of first order reaction is 0.0693per minute . calculate the percentage of reaction remaining at the end of the 60 minute.(with detail solution )

What is the number of carbon atoms present in 22 gram carbon dioxide?

How many moles of calcium hydroxide must be dissolved to produce 250.0 ml of an aqueous solution of pH 10.65 ? Assume complete dissociation. Given 10−3.35=4.47×10−4

10.What are the products formed when alkyene reacts in the presence of H2/pd/CaCO3.

Which one among the following is the most acidic?

Calculate the free energy change for the dissociation of potassium nitrate in water at 298K. (given: delta H = 34 KJ/mol, delta S = 0.116KJ/K/mol)

The average distance travelled by the molecule between successive collision is called _____.

Two elements X and Y have atomic mass 75 and 16 respectively. They combine to give a compound having 75.8% X. The empirical formula of the compound is:

Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight :

How many dichloro products (including stereoisomers) are possible in the given reaction?

Two copper wires have their masses in the ratio of 2 : 3 and their lengths in the ratio 3 : 4. What is the ratio of their resis†an ce? (a) 4 : 9 (b) 16 : 81 (c) 27 : 32 (d) 2 :1.

12. A molecule having molecular formula c8h18 can show only one monobromo derivatives . Find its structural formula

In the given radioactive disintegration series, 23592U→20782Pb Calculate the difference between the number of α and β particles emitted in this series.

The IUPAC name of NC − CH2 − CH|CN−CH2−CN is?

t-butylamine is a

Calculate the concentration of CO2 in a soft drink that is bottled with a partial pressure of 4 atm over the liquid at 25∘C. The Henry's law constant for CO2 in water at 25∘C is 3.1×10−2 atm mol−1L

pH of 10^-7 M HClO4

Calculate the number of moles of KMnO4 that will be neded to react completely with one mole of ferrous oxalate Fe(C2O4) in acidic solution is:

y=e^5x+2 .find dy/dx