46295 + Interview Questions in Chemistry

1.	Among the given free radical bromination reactions, the reaction(s) in which 3∘ halide is a major product is /are :
Answer» Among the given free radical bromination reactions, the reaction(s) in which $3^{\circ}$ halide is a major product is /are :

Discussion

2.	If radiation corresponding to second line of "Balmer series" of Li2+ ion, knocked out electron from first excited state of H− atom then kinetic energy of ejected electron would be:
Answer» If radiation corresponding to second line of "Balmer series" of $L i^{2 +}$ ion, knocked out electron from first excited state of $H -$ atom then kinetic energy of ejected electron would be:

Discussion

3.	Copper is purified by electrolytic refining of blister copper. The incorrect statement about this process is:
Answer» Copper is purified by electrolytic refining of blister copper. The incorrect statement about this process is:

Discussion

4.	What are KMnO4 and sodium chloride?
Answer» What are $K M n O^{4}$ and sodium chloride?

Discussion

5.	When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is (numeral) ___ CHO\|CH2\|CHOH\|CHOH\|CHOH\|CH2OH
Answer» When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is (numeral) ___ $\begin{matrix} CHO \| C H_{2} \| CHOH \| CHOH \| CHOH \| C H_{2} O H \end{matrix}$

5.

When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is (numeral) ___ CHO|CH2|CHOH|CHOH|CHOH|CH2OH

Answer»

When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is (numeral) ___

$\begin{matrix} CHO | C H_{2} | CHOH | CHOH | CHOH | C H_{2} O H \end{matrix}$

Discussion

6.	The root mean square velocity of hydrogen is √5 times than that of nitrogen. If T is the temperature of the gas, then:
Answer» The root mean square velocity of hydrogen is $\sqrt{5}$ times than that of nitrogen. If $T$ is the temperature of the gas, then:

Discussion

7.	A gas that follows Boyle's law, Charle's law and Avogadro's law is called an ideal gas. Under what conditions a real gas would behave ideally?
Answer» A gas that follows Boyle's law, Charle's law and Avogadro's law is called an ideal gas. Under what conditions a real gas would behave ideally?

Discussion

8.	Solubility of an ionic compound in water is mainly dependent on: a. Lattice enthalpy b. Hydration enthalpy Both these factors oppose each other, and the resultant of these factors determines the solubility of an ionic compound in water. If the lattice enthalpy has a larger value, the compound is less soluble. If the hydration enthalpy has larger value, the compound is highly soluble in water. Which of the following is more soluble in water?
Answer» Solubility of an ionic compound in water is mainly dependent on: a. Lattice enthalpy b. Hydration enthalpy Both these factors oppose each other, and the resultant of these factors determines the solubility of an ionic compound in water. If the lattice enthalpy has a larger value, the compound is less soluble. If the hydration enthalpy has larger value, the compound is highly soluble in water. Which of the following is more soluble in water?

Discussion

9.	The following pictures represent various silicate anions. Their formulae are respectively:
Answer» The following pictures represent various silicate anions. Their formulae are respectively:

9.

The following pictures represent various silicate anions. Their formulae are respectively:

Answer»

The following pictures represent various silicate anions.

Their formulae are respectively:

Discussion

10.	an Alkoxide ion is a stronger base than a hydroxide ion. Why?
Answer» an Alkoxide ion is a stronger base than a hydroxide ion. Why?

Discussion

11.	Why polar molecules have dipole moment and non-polar molecules do not have dipole moment?
Answer» Why polar molecules have dipole moment and non-polar molecules do not have dipole moment?

Discussion

12.	For the equilibrium, NH2COONH4(s)⇌2NH3(g)+CO2(g), the partial pressure of carbon-di-oxide (pCO2)=1 atm at 100 ∘C. The value of equilibrium constant (in atm) is:
Answer» For the equilibrium, $N H_{2} C O O N H_{4} (s) ⇌ 2 N H_{3} (g) + C O_{2} (g)$ , the partial pressure of carbon-di-oxide $(p_{C O_{2}}) = 1 atm$ at $100^{\circ} C .$ The value of equilibrium constant (in atm) is:

Discussion

13.	Redox reaction involves transfer of electrons between 2 chemical species. An unbalanced and incomplete example is shown below: N2+H3PO2→HN3+P4O6 If the above reaction were possible in either direction, maximum equivalent weight would belong to:
Answer» Redox reaction involves transfer of electrons between 2 chemical species. An unbalanced and incomplete example is shown below: $N_{2} + H_{3} P O_{2} \to H N_{3} + P_{4} O_{6}$ If the above reaction were possible in either direction, maximum equivalent weight would belong to:

Discussion

14.	Identify the major products ‘P’, ‘Q’ and ‘R’ in the following sequence of reactions:
Answer» Identify the major products ‘P’, ‘Q’ and ‘R’ in the following sequence of reactions:

Discussion

15.	The increasing order of the atomic radii of the following elements is: A. C B. O C. F D. Cl E. Br
Answer» The increasing order of the atomic radii of the following elements is: A. $C$ B. $O$ C. $F$ D. $C l$ E. $B r$

Discussion

16.	Pick out the personal pronoun from the sentence. He was infamous for playing pranks on everyone.
Answer» Pick out the personal pronoun from the sentence. He was infamous for playing pranks on everyone.

16.

Pick out the personal pronoun from the sentence. He was infamous for playing pranks on everyone.

Answer»

Pick out the personal pronoun from the sentence.

He was infamous for playing pranks on everyone.

Discussion

17.	What is the position of F with respect to B in the above arrangement?
Answer» What is the position of F with respect to B in the above arrangement?

Discussion

18.	Given y=x2. As x→2,y→4 what is the value of δ be for which from \|x−2\|<δ it follows that \|y−4\|< ∈ =0.001?
Answer» Given $y = x^{2}$ . As $x \to 2, y \to 4$ what is the value of $δ$ be for which from $\| x - 2 \| < δ$ it follows that $\| y - 4 \| < \in = 0.001$ ?

Discussion

19.	Which ore is malachite among the following?
Answer» Which ore is malachite among the following?

Discussion

20.	The ratio of mean value over one half cycle to the rms value of a.c. of complete cycle
Answer» The ratio of mean value over one half cycle to the rms value of a.c. of complete cycle

Discussion

21.	Products for the given reaction. Me3C−O−CH2CH3+HI1 moleΔ⟶
Answer» Products for the given reaction. $M e_{3} C - O - C H_{2} C H_{3} + H I 1 mole Δ ⟶$

Discussion

22.	Central Water Commission shows that water levels in major reservoirs of the country are alarmingly low. Consider the following statements: Which of the above statement(s) is/are correct?
Answer» Central Water Commission shows that water levels in major reservoirs of the country are alarmingly low. Consider the following statements: Which of the above statement(s) is/are correct?

Discussion

23.	Give electron dot structure for ethanoic acid CH3COOH.
Answer» Give electron dot structure for ethanoic acid $C H_{3} C O O H$ .

Discussion

24.	0.75 g of oleum sample was diluted with water. If the solution required 62.5 mL of 0.25 N NaOH, the % of free SO3 in the sample will be:
Answer» $0.75 g$ of oleum sample was diluted with water. If the solution required $62.5 m L$ of $0.25 N N a O H,$ the $%$ of free $S O_{3}$ in the sample will be:

Discussion

25.	How many moles of HIO4 are consumed by sucrose?
Answer» How many moles of $H I O_{4}$ are consumed by sucrose?

Discussion

26.	How to determine the strength of neuclophiles and electrophiles in a reaction mechanism.
Answer» How to determine the strength of neuclophiles and electrophiles in a reaction mechanism.

Discussion

27.	Why doesn't d2sp hybridisation take place? Please explain in detail!
Answer» Why doesn't d²sp hybridisation take place? Please explain in detail!

Discussion

28.	Which of the following complexes has highest stability constant at 298 K?
Answer» Which of the following complexes has highest stability constant at 298 K?

Discussion

29.	The Compound that doesnot contain a primary carbon is
Answer» The Compound that doesnot contain a primary carbon is

Discussion

30.	On a large scale, ammonia is manufactured by:
Answer» On a large scale, ammonia is manufactured by:

Discussion

31.	x = moles of HCHO consumed. Value of (x) will be
Answer» x = moles of $H C H O$ consumed. Value of (x) will be

Discussion

32.	(i) Name the method used for the refining of zirconium. (ii) What is the role of CO in the extraction of Iron ? (iii) Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Why ?
Answer» (i) Name the method used for the refining of zirconium. (ii) What is the role of CO in the extraction of Iron ? (iii) Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Why ?

Discussion

33.	How many of given cations are more stable than H2C=CH−⊕CH2?
Answer» How many of given cations are more stable than $H_{2} C = C H - \oplus C H_{2}$ ?

Discussion

34.	Stockholm Convention on Persistent Organic Pollutants is an international environmental treaty aims to eliminate or restrict the production and use of persistent organic pollutants. Endosulfan became a highly controversial agrichemical and has been banned under the Stockholm Convention because:
Answer» Stockholm Convention on Persistent Organic Pollutants is an international environmental treaty aims to eliminate or restrict the production and use of persistent organic pollutants. Endosulfan became a highly controversial agrichemical and has been banned under the Stockholm Convention because:

Discussion

35.	How hyperconjugation decreases the heat of hydrogenation and how heat of hydrogeation is to do with the stability of alkenes. Please give a detailed explanation.
Answer» How hyperconjugation decreases the heat of hydrogenation and how heat of hydrogeation is to do with the stability of alkenes. Please give a detailed explanation.

Discussion

36.	In the transport of CO2 from the tissues to the lungs which of the following occurs in the venous blood? A) conversion of CO2 and H2O to H+ and HCO3-- in the RBC'S B) Buffering of H+ by oxy haemoglobin C) Shifting of HCO3-- into the RBC'S from plasma in exchange for Cl- D)Alkalinization of RBC's
Answer» In the transport of CO2 from the tissues to the lungs which of the following occurs in the venous blood? A) conversion of CO2 and H2O to H+ and HCO3-- in the RBC'S B) Buffering of H+ by oxy haemoglobin C) Shifting of HCO3-- into the RBC'S from plasma in exchange for Cl- D)Alkalinization of RBC's

36.

In the transport of CO2 from the tissues to the lungs which of the following occurs in the venous blood? A) conversion of CO2 and H2O to H+ and HCO3-- in the RBC'S B) Buffering of H+ by oxy haemoglobin C) Shifting of HCO3-- into the RBC'S from plasma in exchange for Cl- D)Alkalinization of RBC's

Answer»

In the transport of CO2 from the tissues to the lungs which of the following occurs in the venous blood?

A) conversion of CO2 and H2O to H+ and HCO3-- in the RBC'S

B) Buffering of H+ by oxy haemoglobin

C) Shifting of HCO3-- into the RBC'S from plasma in exchange for Cl-

D)Alkalinization of RBC's

Discussion

37.	Which of the following compounds would not evolve CO2 when treated with NaHCO3 ?
Answer» Which of the following compounds would not evolve CO₂ when treated with NaHCO₃?

Discussion

38.	p-V plots for two gases during adiabatic processes are shown in the following figure. Plots 1 and 2 should correspond respectively to
Answer» p-V plots for two gases during adiabatic processes are shown in the following figure. Plots 1 and 2 should correspond respectively to

Discussion

39.	Which of the following forms a colloidal solution in water?
Answer» Which of the following forms a colloidal solution in water?

Discussion

40.	Why ancient glass becomes milky?
Answer» Why ancient glass becomes milky?

Discussion

41.	If Pauli's exclusion principle was not known, the electronic configuration of Lithium atom would be:
Answer» If Pauli's exclusion principle was not known, the electronic configuration of Lithium atom would be:

Discussion

42.	ΔG∘ for the reaction x + y ⇌ z is −4.606 kcal. The value of equilibrium constant of the reaction at 227∘C is
Answer» $Δ G^{\circ}$ for the reaction $x + y ⇌ z$ is $- 4.606 k c a l$ . The value of equilibrium constant of the reaction at $227^{\circ} C$ is

Discussion

43.	As atomic orbitals are filled according to the Aufbau principle, the 6s orbitals are filled immediately after which of the following orbitals?
Answer» As atomic orbitals are filled according to the Aufbau principle, the 6s orbitals are filled immediately after which of the following orbitals?

Discussion

44.	If the equilibrium constant of the reaction 2HI ⇌ H2 + I2 is 0.25, then the equilibrium constant of the reaction H2 + I2 ⇌ 2HI would be
Answer» If the equilibrium constant of the reaction $2 H I ⇌ H_{2} + I_{2}$ is $0.25$ , then the equilibrium constant of the reaction $H_{2} + I_{2} ⇌ 2 H I$ would be

44.

If the equilibrium constant of the reaction 2HI ⇌ H2 + I2 is 0.25, then the equilibrium constant of the reaction H2 + I2 ⇌ 2HI would be

Answer»

If the equilibrium constant of the reaction $2 H I ⇌ H_{2} + I_{2}$ is $0.25$ , then the

equilibrium constant of the reaction $H_{2} + I_{2} ⇌ 2 H I$ would be

Discussion

45.	If P0 and P are the vapour pressure of a solvent and its solution respectively and N1 and N2 are the mole fractions of the solvent and solute respectively, then correct relation is
Answer» If P⁰ and P are the vapour pressure of a solvent and its solution respectively and N₁ and N₂ are the mole fractions of the solvent and solute respectively, then correct relation is

Discussion

46.	Which of the following is a stable free radical?
Answer» Which of the following is a stable free radical?

Discussion

47.	Ford elementary reaction M ------> N (M gives N), the rate of disappearance of M is increased by factor of 8 upon doubling the concentration of M. the order of the reaction with respect to M is: A) 4 B)3 C)2 D)1 [ Doubt: what does order of reaction mean. ]
Answer» Ford elementary reaction M ------> N (M gives N), the rate of disappearance of M is increased by factor of 8 upon doubling the concentration of M. the order of the reaction with respect to M is: A) 4 B)3 C)2 D)1 [ Doubt: what does order of reaction mean. ]

47.

Ford elementary reaction M ------> N (M gives N), the rate of disappearance of M is increased by factor of 8 upon doubling the concentration of M. the order of the reaction with respect to M is: A) 4 B)3 C)2 D)1 [ Doubt: what does order of reaction mean. ]

Answer»

Ford elementary reaction M ------> N (M gives N), the rate of disappearance of M is increased by factor of 8 upon doubling the concentration of M. the order of the reaction with respect to M is:

A) 4

B)3

C)2

D)1

[ Doubt: what does order of reaction mean. ]

Discussion

48.	What is the concentration of NO3- ions when equal volume of 0.1M AgNO3 and 0.1M NaCl are mixed together?
Answer» What is the concentration of NO3- ions when equal volume of 0.1M AgNO3 and 0.1M NaCl are mixed together?

Discussion

49.	What is the chief product obtained when n-butane is treated with bromine in the presence of light at 130∘C
Answer» What is the chief product obtained when n-butane is treated with bromine in the presence of light at $130^{\circ} C$

Discussion

50.	Which of the following reactions will give optically inactive alcohol(s)?
Answer» Which of the following reactions will give optically inactive alcohol(s)?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Among the given free radical bromination reactions, the reaction(s) in which 3∘ halide is a major product is /are :

If radiation corresponding to second line of "Balmer series" of Li2+ ion, knocked out electron from first excited state of H− atom then kinetic energy of ejected electron would be:

Copper is purified by electrolytic refining of blister copper. The incorrect statement about this process is:

What are KMnO4 and sodium chloride?

When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is (numeral) ___ CHO|CH2|CHOH|CHOH|CHOH|CH2OH

The root mean square velocity of hydrogen is √5 times than that of nitrogen. If T is the temperature of the gas, then:

A gas that follows Boyle's law, Charle's law and Avogadro's law is called an ideal gas. Under what conditions a real gas would behave ideally?

The following pictures represent various silicate anions. Their formulae are respectively:

an Alkoxide ion is a stronger base than a hydroxide ion. Why?

Why polar molecules have dipole moment and non-polar molecules do not have dipole moment?

For the equilibrium, NH2COONH4(s)⇌2NH3(g)+CO2(g), the partial pressure of carbon-di-oxide (pCO2)=1 atm at 100 ∘C. The value of equilibrium constant (in atm) is:

Redox reaction involves transfer of electrons between 2 chemical species. An unbalanced and incomplete example is shown below: N2+H3PO2→HN3+P4O6 If the above reaction were possible in either direction, maximum equivalent weight would belong to:

Identify the major products ‘P’, ‘Q’ and ‘R’ in the following sequence of reactions:

The increasing order of the atomic radii of the following elements is: A. C B. O C. F D. Cl E. Br

Pick out the personal pronoun from the sentence. He was infamous for playing pranks on everyone.

What is the position of F with respect to B in the above arrangement?

Given y=x2. As x→2,y→4 what is the value of δ be for which from |x−2|&lt;δ it follows that |y−4|&lt; ∈ =0.001?

Which ore is malachite among the following?

The ratio of mean value over one half cycle to the rms value of a.c. of complete cycle

Products for the given reaction. Me3C−O−CH2CH3+HI1 moleΔ⟶

Central Water Commission shows that water levels in major reservoirs of the country are alarmingly low. Consider the following statements: Which of the above statement(s) is/are correct?

Give electron dot structure for ethanoic acid CH3COOH.

0.75 g of oleum sample was diluted with water. If the solution required 62.5 mL of 0.25 N NaOH, the % of free SO3 in the sample will be:

How many moles of HIO4 are consumed by sucrose?

How to determine the strength of neuclophiles and electrophiles in a reaction mechanism.

Why doesn't d2sp hybridisation take place? Please explain in detail!

Which of the following complexes has highest stability constant at 298 K?

The Compound that doesnot contain a primary carbon is

On a large scale, ammonia is manufactured by:

x = moles of HCHO consumed. Value of (x) will be

(i) Name the method used for the refining of zirconium. (ii) What is the role of CO in the extraction of Iron ? (iii) Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Why ?

How many of given cations are more stable than H2C=CH−⊕CH2?

Stockholm Convention on Persistent Organic Pollutants is an international environmental treaty aims to eliminate or restrict the production and use of persistent organic pollutants. Endosulfan became a highly controversial agrichemical and has been banned under the Stockholm Convention because:

How hyperconjugation decreases the heat of hydrogenation and how heat of hydrogeation is to do with the stability of alkenes. Please give a detailed explanation.

In the transport of CO2 from the tissues to the lungs which of the following occurs in the venous blood? A) conversion of CO2 and H2O to H+ and HCO3-- in the RBC'S B) Buffering of H+ by oxy haemoglobin C) Shifting of HCO3-- into the RBC'S from plasma in exchange for Cl- D)Alkalinization of RBC's

Which of the following compounds would not evolve CO2 when treated with NaHCO3 ?

p-V plots for two gases during adiabatic processes are shown in the following figure. Plots 1 and 2 should correspond respectively to

Which of the following forms a colloidal solution in water?

Why ancient glass becomes milky?

If Pauli's exclusion principle was not known, the electronic configuration of Lithium atom would be:

ΔG∘ for the reaction x + y ⇌ z is −4.606 kcal. The value of equilibrium constant of the reaction at 227∘C is

As atomic orbitals are filled according to the Aufbau principle, the 6s orbitals are filled immediately after which of the following orbitals?

If the equilibrium constant of the reaction 2HI ⇌ H2 + I2 is 0.25, then the equilibrium constant of the reaction H2 + I2 ⇌ 2HI would be

If P0 and P are the vapour pressure of a solvent and its solution respectively and N1 and N2 are the mole fractions of the solvent and solute respectively, then correct relation is

Which of the following is a stable free radical?

Ford elementary reaction M ------&gt; N (M gives N), the rate of disappearance of M is increased by factor of 8 upon doubling the concentration of M. the order of the reaction with respect to M is: A) 4 B)3 C)2 D)1 [ Doubt: what does order of reaction mean. ]

What is the concentration of NO3- ions when equal volume of 0.1M AgNO3 and 0.1M NaCl are mixed together?

What is the chief product obtained when n-butane is treated with bromine in the presence of light at 130∘C

Which of the following reactions will give optically inactive alcohol(s)?

Given y=x2. As x→2,y→4 what is the value of δ be for which from |x−2|<δ it follows that |y−4|< ∈ =0.001?

Ford elementary reaction M ------> N (M gives N), the rate of disappearance of M is increased by factor of 8 upon doubling the concentration of M. the order of the reaction with respect to M is: A) 4 B)3 C)2 D)1 [ Doubt: what does order of reaction mean. ]