46295 + Interview Questions in Chemistry

1.	Match the following list of bioactive substances and their roles:
Answer» Match the following list of bioactive substances and their roles:

1.

Match the following list of bioactive substances and their roles:

Answer»

Match the following list of bioactive substances and their roles:

2.	A near ultraviolet photon of 300 nm is absorbed by a gas and then remitted as two photons. One photon is red with wavelength of 760 nm. What would be the wave number of the second photon?
Answer» A near ultraviolet photon of 300 nm is absorbed by a gas and then remitted as two photons. One photon is red with wavelength of 760 nm. What would be the wave number of the second photon?

Discussion

3.	Which one of the following nitro-compounds does not react with nitrous acid ?
Answer» Which one of the following nitro-compounds does not react with nitrous acid ?

Discussion

4.	An azeotropic solution of two liquids has a boiling point lower than either of them when it:-
Answer» An azeotropic solution of two liquids has a boiling point lower than either of them when it:-

Discussion

5.	The translational kinetic energy of an ideal gas depends only on its
Answer» The translational kinetic energy of an ideal gas depends only on its

Discussion

6.	Calculate the mass of 1 cm3 of oxygen kept at STP.
Answer» Calculate the mass of 1 $c m^{3}$ of oxygen kept at STP.

Discussion

7.	Question 26 Calculate the total number of angular nodes and radical nodes and radical nodes present in 3p orbital.
Answer» Question 26 Calculate the total number of angular nodes and radical nodes and radical nodes present in 3p orbital.

7.

Question 26 Calculate the total number of angular nodes and radical nodes and radical nodes present in 3p orbital.

Answer»

Question 26

Calculate the total number of angular nodes and radical nodes and radical nodes present in 3p orbital.

Discussion

8.	The strongest acid among the following aromatic compounds is
Answer» The strongest acid among the following aromatic compounds is

Discussion

9.	For tetrahedral coordination number, the radius ratio [KCET 2000]
Answer» For tetrahedral coordination number, the radius ratio [KCET 2000]

9.

For tetrahedral coordination number, the radius ratio [KCET 2000]

Answer»

For tetrahedral coordination number, the radius ratio

[KCET 2000]

Discussion

10.	The only correct combination in which enolate is formed?
Answer» The only correct combination in which enolate is formed?

10.

The only correct combination in which enolate is formed?

Answer»

The only correct combination in which enolate is formed?

Discussion

11.	Ephedrine is a secondary amine. It is widely used in cold and allergy conditions in the form of its hydrochloride but not as such because
Answer» Ephedrine is a secondary amine. It is widely used in cold and allergy conditions in the form of its hydrochloride but not as such because

Discussion

12.	Alcohols can be converted to various types of gasoline (petrol) by shape-selective catalysts
Answer» Alcohols can be converted to various types of gasoline (petrol) by shape-selective catalysts

Discussion

13.	An ice box used for keeping eatable cold has a total wall area of 1 m2 and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K = 0.01 joule/metre-0C. It is filled with ice at 0C along with eatables on a day when the temperature is 300C. The latent heat of fusion of ice is 334×103 joule/kg. The amount of ice melted in one day is ( 1day = 86.400 s)
Answer» An ice box used for keeping eatable cold has a total wall area of 1 m² and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K = 0.01 joule/metre-⁰C. It is filled with ice at ⁰C along with eatables on a day when the temperature is 30⁰C. The latent heat of fusion of ice is 334×10³ joule/kg. The amount of ice melted in one day is ( 1day = 86.400 s)

Discussion

14.	HBr reacts slowest with
Answer» HBr reacts slowest with

Discussion

15.	Not counting geometrical isomers. How many isomers can C4H8 have?
Answer» Not counting geometrical isomers. How many isomers can $C_{4} H_{8}$ have?

Discussion

16.	Which of the following are correct about physisorption? 1) Decrease in entropy of system 2) Decrease in enthalpy 3) The value of TdS is positive 4) It is reversible in nature
Answer» Which of the following are correct about physisorption? 1) Decrease in entropy of system 2) Decrease in enthalpy 3) The value of TdS is positive 4) It is reversible in nature

16.

Which of the following are correct about physisorption? 1) Decrease in entropy of system 2) Decrease in enthalpy 3) The value of TdS is positive 4) It is reversible in nature

Answer»

Which of the following are correct about physisorption?

1) Decrease in entropy of system
2) Decrease in enthalpy
3) The value of TdS is positive
4) It is reversible in nature

Discussion

17.	The initial state of certain gas is (Pi,Vi,Ti). It undergoes expansion till its volume becomes Vf at constant temperature T. The correct plot of P-V diagram for it is
Answer» The initial state of certain gas is $(P_{i}, V_{i}, T_{i})$ . It undergoes expansion till its volume becomes $V_{f}$ at constant temperature T. The correct plot of P-V diagram for it is

Discussion

18.	Amongst the following, the most stable complex is (i) [Fe(H2O)6]3+ (ii) [Fe(NH3)6]3+ (iii) [Fe(C2O4)3]3- (iv) [FeCl6]3-
Answer» Amongst the following, the most stable complex is (i) [Fe(H₂O)₆]³⁺ (ii) [Fe(NH₃)₆]³⁺ (iii) [Fe(C₂O₄)₃]^3- (iv) [FeCl₆]^3-

18.

Amongst the following, the most stable complex is (i) [Fe(H2O)6]3+ (ii) [Fe(NH3)6]3+ (iii) [Fe(C2O4)3]3- (iv) [FeCl6]3-

Answer»

Amongst the following, the most stable complex is

(i) [Fe(H₂O)₆]³⁺

(ii) [Fe(NH₃)₆]³⁺

(iii) [Fe(C₂O₄)₃]^3-

(iv) [FeCl₆]^3-

Discussion

19.	When a substance A reacts with water, it produces a combustible gas B and a solution of substance C in water. D reacts with this solution of C and produces the same gas B on warming. D can also produce gas B on reaction with dilute H2SO4 . A imparts a deep golden yellow colour to smokeless flame. A, B, C and D respectively are:
Answer» When a substance A reacts with water, it produces a combustible gas B and a solution of substance C in water. D reacts with this solution of C and produces the same gas B on warming. D can also produce gas B on reaction with dilute $H_{2} S O_{4}$ . A imparts a deep golden yellow colour to smokeless flame. A, B, C and D respectively are:

Discussion

20.	Which of the following is the most stable ion?
Answer» Which of the following is the most stable ion?

Discussion

21.	Three black bodies are such that the maximum intensity of their wavelength are in the ratio λm1:λm2:λm3=1:(21)0.5:(3)0.5. Which of these is true for their temperature?
Answer» Three black bodies are such that the maximum intensity of their wavelength are in the ratio $λ_{m_{1}} : λ_{m_{2}} : λ_{m_{3}} = 1 : (21)^{0.5} : (3)^{0.5}$ . Which of these is true for their temperature?

Discussion

22.	The poisonous gas ‘Lewisite’ is obtained by reaction of
Answer» The poisonous gas ‘Lewisite’ is obtained by reaction of

Discussion

23.	The correct increasing order of acidity is:
Answer» The correct increasing order of acidity is:

Discussion

24.	'Cis-1, 4-polyisoprene' is
Answer» 'Cis-1, 4-polyisoprene' is

Discussion

25.	The density of a 9.5% by mass solution of fructose (C6H12O6) is 1.036g/cm3 at 293k. Calculate the osmotic pressure of solution.
Answer» The density of a 9.5% by mass solution of fructose $(C_{6} H_{12} O_{6})$ is $1.036 g / c m^{3}$ at 293k. Calculate the osmotic pressure of solution.

Discussion

26.	Explain zone refining of a crude metal with example
Answer» Explain zone refining of a crude metal with example

Discussion

27.	Which of the following species is the least stable
Answer» Which of the following species is the least stable

Discussion

28.	What would be the probable products of the given reaction?
Answer» What would be the probable products of the given reaction?

Discussion

29.	A non C - C bond formation is not possible in :
Answer» A non C - C bond formation is not possible in :

Discussion

30.	Which of the following is an electrophile?
Answer» Which of the following is an electrophile?

Discussion

31.	Fraction of total volume occupied by atoms in a simple cubic cell is
Answer» Fraction of total volume occupied by atoms in a simple cubic cell is

Discussion

32.	In solid state PCl5 exists as
Answer» In solid state $P C l_{5}$ exists as

Discussion

33.	The behaviour of matter in differnet states is governed by various physical laws. According to you, what are the factors that determine the state of matter?
Answer» The behaviour of matter in differnet states is governed by various physical laws. According to you, what are the factors that determine the state of matter?

Discussion

34.	Use the information and date given below to answer the question (a) to (c), Stronger intermolecular forces result in higher boiling point. Strength of London forces increases with the number of electrons in the molecule. Boiling point of HF,HCl, HBr and Hi are 293 k, 189 k, 206 k and 238 k respectively. (a) Which type of intermolecular forces are present in the molecules HF, HCl, HBr an HI? (b) Looking at the trend of boiling points of HCl, HBr and HI, explain out of dipole-dipole interaction and London interaction, which one is predominant here. (c) Why is boiling point of hydrogen fluoride highest while that of hydrogen chloride lowest?
Answer» Use the information and date given below to answer the question (a) to (c), Stronger intermolecular forces result in higher boiling point. Strength of London forces increases with the number of electrons in the molecule. Boiling point of HF,HCl, HBr and Hi are 293 k, 189 k, 206 k and 238 k respectively. (a) Which type of intermolecular forces are present in the molecules HF, HCl, HBr an HI? (b) Looking at the trend of boiling points of HCl, HBr and HI, explain out of dipole-dipole interaction and London interaction, which one is predominant here. (c) Why is boiling point of hydrogen fluoride highest while that of hydrogen chloride lowest?

34.

Use the information and date given below to answer the question (a) to (c), Stronger intermolecular forces result in higher boiling point. Strength of London forces increases with the number of electrons in the molecule. Boiling point of HF,HCl, HBr and Hi are 293 k, 189 k, 206 k and 238 k respectively. (a) Which type of intermolecular forces are present in the molecules HF, HCl, HBr an HI? (b) Looking at the trend of boiling points of HCl, HBr and HI, explain out of dipole-dipole interaction and London interaction, which one is predominant here. (c) Why is boiling point of hydrogen fluoride highest while that of hydrogen chloride lowest?

Answer»

Use the information and date given below to answer the question (a) to (c),

Stronger intermolecular forces result in higher boiling point.

Strength of London forces increases with the number of electrons in the molecule.

Boiling point of HF,HCl, HBr and Hi are 293 k, 189 k, 206 k and 238 k respectively.

(a) Which type of intermolecular forces are present in the molecules HF, HCl, HBr an HI?

(b) Looking at the trend of boiling points of HCl, HBr and HI, explain out of dipole-dipole interaction and London interaction, which one is predominant here.

(c) Why is boiling point of hydrogen fluoride highest while that of hydrogen chloride lowest?

Discussion

35.	For which of the following ions, could the line spectrum not be explained using Bohr's model?
Answer» For which of the following ions, could the line spectrum not be explained using Bohr's model?

Discussion

36.	For a given reaction aA+bB⟶cC+dD where a,b,c,d are the stoichiometric coefficients of A,B,C,D respectively. Choose the correct statement(s):
Answer» For a given reaction $a A + b B ⟶ c C + d D$ where $a, b, c, d$ are the stoichiometric coefficients of $A, B, C, D$ respectively. Choose the correct statement(s):

Discussion

37.	Calculate the minimum and maximum number of electrons which may have magnetic quantum number, m=+1 and spin quantum number, s=−12 in chromium (Cr) :
Answer» Calculate the minimum and maximum number of electrons which may have magnetic quantum number, $m = + 1$ and spin quantum number, $s = - \frac{1}{2}$ in chromium $(C r)$ :

Discussion

38.	Consider the following reactions: (a) H+(aq)+OH−(aq)→H2O(l) ΔH=−x1 kJ mol−1 (b) H2(g)+12O2(g)→H2O(l) ΔH=−x2 kJ mol−1 (c) CO2(g)+H2(g)→CO(g)′+H2O(l) ΔH=−x3 kJ mol−1 (d) C2H2(g)+52O2(g)→2CO2(g)+H2O(l) ΔH=x4 kJ mol−1 Enthalpy of formation of H2O(l) is
Answer» Consider the following reactions: (a) $H^{+} (a q) + O H^{-} (a q) \to H_{2} O (l) Δ H = - x_{1} k J m o l^{- 1}$ (b) $H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (l) Δ H = - x_{2} k J m o l^{- 1}$ (c) $C O_{2} (g) + H_{2 (g)} \to C O_{(g)^{'}} + H_{2} O (l) Δ H = - x_{3} k J m o l^{- 1}$ (d) $C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to 2 C O_{2} (g) + H_{2} O (l) Δ H = x_{4} k J m o l^{- 1}$ Enthalpy of formation of $H_{2} O (l)$ is

38.

Consider the following reactions: (a) H+(aq)+OH−(aq)→H2O(l) ΔH=−x1 kJ mol−1 (b) H2(g)+12O2(g)→H2O(l) ΔH=−x2 kJ mol−1 (c) CO2(g)+H2(g)→CO(g)′+H2O(l) ΔH=−x3 kJ mol−1 (d) C2H2(g)+52O2(g)→2CO2(g)+H2O(l) ΔH=x4 kJ mol−1 Enthalpy of formation of H2O(l) is

Answer»

Consider the following reactions:

(a) $H^{+} (a q) + O H^{-} (a q) \to H_{2} O (l) Δ H = - x_{1} k J m o l^{- 1}$

(b) $H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (l) Δ H = - x_{2} k J m o l^{- 1}$

(c) $C O_{2} (g) + H_{2 (g)} \to C O_{(g)^{'}} + H_{2} O (l) Δ H = - x_{3} k J m o l^{- 1}$

(d) $C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to 2 C O_{2} (g) + H_{2} O (l) Δ H = x_{4} k J m o l^{- 1}$

Enthalpy of formation of $H_{2} O (l)$ is

Discussion

39.	With respect to graphite and diamond, which of the statement(s) given below is/are correct?
Answer» With respect to graphite and diamond, which of the statement(s) given below is/are correct?

Discussion

40.	1.0 mole of Fe reacts completely with 0.65 mole of O2 to give a mixture of only FeO and Fe2O3. The mole ratio of ferrous oxide to ferric oxide is x: y, then (x+y) is
Answer» 1.0 mole of $F e$ reacts completely with 0.65 mole of $O_{2}$ to give a mixture of only $F e O$ and $F e_{2} O_{3}$ . The mole ratio of ferrous oxide to ferric oxide is x: y, then (x+y) is

Discussion

41.	Which of the following statements is correct?
Answer» Which of the following statements is correct?

Discussion

42.	The order of electronegativity of the hybrid orbitals of carbon is
Answer» The order of electronegativity of the hybrid orbitals of carbon is

Discussion

43.	Arrange the molecules in the increasing order of bond angle.
Answer» Arrange the molecules in the increasing order of bond angle.

Discussion

44.	Compared with alkaline earth metals, the alkali metals exhibit:
Answer» Compared with alkaline earth metals, the alkali metals exhibit:

Discussion

45.	The element with Z = 114, belongs to which period?
Answer» The element with Z = 114, belongs to which period?

Discussion

46.	QUESTION 14.99(i) What happens when D-glucose is treated with the following reagents? (i) HI (ii) Bromine water (iii) HNO3
Answer» QUESTION 14.99(i) What happens when D-glucose is treated with the following reagents? (i) HI (ii) Bromine water (iii) $H N O_{3}$

46.

QUESTION 14.99(i) What happens when D-glucose is treated with the following reagents? (i) HI (ii) Bromine water (iii) HNO3

Answer»

QUESTION 14.99(i)

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

(i) HI

(ii) Bromine water

(iii) $H N O_{3}$

Discussion

47.	If C1,C2,C3........ represent the speeds of n1,n2,n3........ molecules, then the root mean square speed is.......
Answer» If $C_{1}$ , $C_{2}$ , $C_{3}$ ........ represent the speeds of $n_{1}$ , $n_{2}$ , $n_{3}$ ........ molecules, then the root mean square speed is.......

Discussion

48.	(CH3)2SiCl2 on hydrolysis will produce
Answer» $(C H_{3})_{2} S i C l_{2}$ on hydrolysis will produce

Discussion

49.	Find the work done when 5 moles of hydrogen contracts isothermally from 15 L to 5 L against a constant pressure of 1 atm at 250C.
Answer» Find the work done when $5$ moles of hydrogen contracts isothermally from $15$ L to $5$ L against a constant pressure of 1 atm at $25^{0} C$ .

Discussion

50.	To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements. Illustrate your answer with examples.
Answer» To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements. Illustrate your answer with examples.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Match the following list of bioactive substances and their roles:

A near ultraviolet photon of 300 nm is absorbed by a gas and then remitted as two photons. One photon is red with wavelength of 760 nm. What would be the wave number of the second photon?

Which one of the following nitro-compounds does not react with nitrous acid ?

An azeotropic solution of two liquids has a boiling point lower than either of them when it:-

The translational kinetic energy of an ideal gas depends only on its

Calculate the mass of 1 cm3 of oxygen kept at STP.

Question 26 Calculate the total number of angular nodes and radical nodes and radical nodes present in 3p orbital.

The strongest acid among the following aromatic compounds is

For tetrahedral coordination number, the radius ratio [KCET 2000]

The only correct combination in which enolate is formed?

Ephedrine is a secondary amine. It is widely used in cold and allergy conditions in the form of its hydrochloride but not as such because

Alcohols can be converted to various types of gasoline (petrol) by shape-selective catalysts

HBr reacts slowest with

Not counting geometrical isomers. How many isomers can C4H8 have?

Which of the following are correct about physisorption? 1) Decrease in entropy of system 2) Decrease in enthalpy 3) The value of TdS is positive 4) It is reversible in nature

The initial state of certain gas is (Pi,Vi,Ti). It undergoes expansion till its volume becomes Vf at constant temperature T. The correct plot of P-V diagram for it is

Amongst the following, the most stable complex is (i) [Fe(H2O)6]3+ (ii) [Fe(NH3)6]3+ (iii) [Fe(C2O4)3]3- (iv) [FeCl6]3-

Which of the following is the most stable ion?

Three black bodies are such that the maximum intensity of their wavelength are in the ratio λm1:λm2:λm3=1:(21)0.5:(3)0.5. Which of these is true for their temperature?

The poisonous gas ‘Lewisite’ is obtained by reaction of

The correct increasing order of acidity is:

'Cis-1, 4-polyisoprene' is

The density of a 9.5% by mass solution of fructose (C6H12O6) is 1.036g/cm3 at 293k. Calculate the osmotic pressure of solution.

Explain zone refining of a crude metal with example

Which of the following species is the least stable

What would be the probable products of the given reaction?

A non C - C bond formation is not possible in :

Which of the following is an electrophile?

Fraction of total volume occupied by atoms in a simple cubic cell is

In solid state PCl5 exists as

The behaviour of matter in differnet states is governed by various physical laws. According to you, what are the factors that determine the state of matter?

For which of the following ions, could the line spectrum not be explained using Bohr's model?

For a given reaction aA+bB⟶cC+dD where a,b,c,d are the stoichiometric coefficients of A,B,C,D respectively. Choose the correct statement(s):

Calculate the minimum and maximum number of electrons which may have magnetic quantum number, m=+1 and spin quantum number, s=−12 in chromium (Cr) :

Consider the following reactions: (a) H+(aq)+OH−(aq)→H2O(l) ΔH=−x1 kJ mol−1 (b) H2(g)+12O2(g)→H2O(l) ΔH=−x2 kJ mol−1 (c) CO2(g)+H2(g)→CO(g)′+H2O(l) ΔH=−x3 kJ mol−1 (d) C2H2(g)+52O2(g)→2CO2(g)+H2O(l) ΔH=x4 kJ mol−1 Enthalpy of formation of H2O(l) is

With respect to graphite and diamond, which of the statement(s) given below is/are correct?

1.0 mole of Fe reacts completely with 0.65 mole of O2 to give a mixture of only FeO and Fe2O3. The mole ratio of ferrous oxide to ferric oxide is x: y, then (x+y) is

Which of the following statements is correct?

The order of electronegativity of the hybrid orbitals of carbon is

Arrange the molecules in the increasing order of bond angle.

Compared with alkaline earth metals, the alkali metals exhibit:

The element with Z = 114, belongs to which period?

QUESTION 14.99(i) What happens when D-glucose is treated with the following reagents? (i) HI (ii) Bromine water (iii) HNO3

If C1,C2,C3........ represent the speeds of n1,n2,n3........ molecules, then the root mean square speed is.......

(CH3)2SiCl2 on hydrolysis will produce

Find the work done when 5 moles of hydrogen contracts isothermally from 15 L to 5 L against a constant pressure of 1 atm at 250C.

To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements. Illustrate your answer with examples.