46295 + Interview Questions in Chemistry

1.	Which of the following structure(s) is/are meso-2,3 butanediol?
Answer» Which of the following structure(s) is/are meso-2,3 butanediol?

Discussion

2.	Which has maximum dipole moment ?
Answer» Which has maximum dipole moment ?

Discussion

3.	How many metallic ores are concentrated by the magnetic separation method from the given ores? Cassiterite, pyrolusite, rutile, magnetite, galena, cinnabar.
Answer» How many metallic ores are concentrated by the magnetic separation method from the given ores? Cassiterite, pyrolusite, rutile, magnetite, galena, cinnabar.

Discussion

4.	Which of the following oxides is not expected to react with sodium hydroxide?
Answer» Which of the following oxides is not expected to react with sodium hydroxide?

Discussion

5.	Which of the following compounds has the highest enol content?
Answer» Which of the following compounds has the highest enol content?

Discussion

6.	The volume of N2 at STP required to form a mono layer on the surface of an iron catalyst is 22.4 mL/g of the adsorbent. What will be the surface area of the adsorbent per g if each nitrogen molecule occupies 16×10−22 m2?
Answer» The volume of $N_{2}$ at STP required to form a mono layer on the surface of an iron catalyst is $22.4 mL/g$ of the adsorbent. What will be the surface area of the adsorbent per $g$ if each nitrogen molecule occupies $16 \times 10^{- 22} m^{2}$ ?

Discussion

7.	Explain the formation of n- type of semiconductor from silicon.
Answer» Explain the formation of n- type of semiconductor from silicon.

Discussion

8.	Consider an isothermal reversible compression of 1 mole of an ideal gas in which pressure of the system increased from 5 atm to 30 atm at 300 K. The entropy change (in kJ) of the surrounding is: (R=8.314 Jmol−1K−1)
Answer» Consider an isothermal reversible compression of 1 mole of an ideal gas in which pressure of the system increased from 5 atm to 30 atm at 300 K. The entropy change (in kJ) of the surrounding is: ( $R = 8.314 J m o l^{- 1} K^{- 1}$ )

Discussion

9.	A thermodynamical system is changed from state (P1,V1) to (P2,V2) by two different processes. The quantity which will remain same will be:
Answer» A thermodynamical system is changed from state $(P_{1}, V_{1})$ to $(P_{2}, V_{2})$ by two different processes. The quantity which will remain same will be:

Discussion

10.	The correct order of relative stability of half-filled and completely filled sub-shell is:
Answer» The correct order of relative stability of half-filled and completely filled sub-shell is:

Discussion

11.	In keto-enol tautomerism of 1,3-dicarbonyl compounds, the enol form is preferred in contrast to the keto-enol form, this is due to:
Answer» In keto-enol tautomerism of 1,3-dicarbonyl compounds, the enol form is preferred in contrast to the keto-enol form, this is due to:

Discussion

12.	Enzymes having slightly different molecular structure but performing identical activity are
Answer» Enzymes having slightly different molecular structure but performing identical activity are

Discussion

13.	. The correct statement is
Answer» . The correct statement is

Discussion

14.	CH3−CH=C=CH−CH=CH−CH=C=CH−CH3 Find the number of stereoisomers of the given compound.
Answer» $C H_{3} - C H = C = C H - C H = C H - C H = C = C H - C H_{3}$ Find the number of stereoisomers of the given compound.

Discussion

15.	Alkyl halides can be obtained by all methods except for:
Answer» Alkyl halides can be obtained by all methods except for:

Discussion

16.	The number of equidistant oppositely charged ions in a sodium chloride crystal is[MP PET 2001]
Answer» The number of equidistant oppositely charged ions in a sodium chloride crystal is [MP PET 2001]

Discussion

17.	Sun glasses have small amount of AgCl incorporated in the lenses. When light of appropriate wavelength is exposed it turns to gray colour to reduce the glare following the reactions: AgClhv−→Ag (Gray)+12Cl2 If the heat of reaction for the decomposition of AgCl is 248 kJ mol−1. Find the wavelength needed to induce the desired process?
Answer» Sun glasses have small amount of $A g C l$ incorporated in the lenses. When light of appropriate wavelength is exposed it turns to gray colour to reduce the glare following the reactions: $A g C l h v - \to A g (Gray) + \frac{1}{2} C l_{2}$ If the heat of reaction for the decomposition of $A g C l$ is $248 {kJ mol}^{- 1}$ . Find the wavelength needed to induce the desired process?

Discussion

18.	Consider an endothermic reaction X → Y with the activation energies Eb and Ef for the backward and forward reactions respectively. In general
Answer» Consider an endothermic reaction X $\to$ Y with the activation energies Eb and Ef for the backward and forward reactions respectively. In general

Discussion

19.	O2− and Si4+ are isoelectronic ions. If the ionic radius of O2− is 1.4∘A, that of Si4+ is
Answer» $O^{2 -}$ and $S i^{4 +}$ are isoelectronic ions. If the ionic radius of $O^{2 -}$ is $1.4 \circ A$ , that of $S i^{4 +}$ is

Discussion

20.	If the separation between the 1st the 5th layer in an ABCABC type crystal is n√227r (r = radius of atom), then n is
Answer» If the separation between the $1^{s t}$ the $5^{t h}$ layer in an ABCABC type crystal is $n \sqrt{\frac{2}{27}} r$ (r = radius of atom), then n is

Discussion

21.	Which of the following is/are correct about ionic hydrides?
Answer» Which of the following is/are correct about ionic hydrides?

Discussion

22.	Electronic transitions in Li2+ ions take place from n2 to n1 shell such that:2n2+3n1=18 and 2n2−3n1=6. The total number of photons emitted when electrons transit to n1 shell is x (electrons do not fall lower than n1 shell) and number of photons emitted in the Balmer range is y. Find value of x+y.
Answer» Electronic transitions in $L i^{2 +}$ ions take place from $n_{2}$ to $n_{1}$ shell such that: $2 n_{2} + 3 n_{1} = 18$ and $2 n_{2} - 3 n_{1} = 6$ . The total number of photons emitted when electrons transit to $n_{1}$ shell is x (electrons do not fall lower than $n_{1}$ shell) and number of photons emitted in the Balmer range is y. Find value of $x + y$ .

Discussion

23.	The weakest bond among the following is _____.
Answer» The weakest bond among the following is _____.

Discussion

24.	Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Chemical messengers are chemicals that enable communication of message between two neurons or between neurons and muscles. Reason (R) Chemicals enter the cell through receptor.
Answer» Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Chemical messengers are chemicals that enable communication of message between two neurons or between neurons and muscles. Reason (R) Chemicals enter the cell through receptor.

24.

Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Chemical messengers are chemicals that enable communication of message between two neurons or between neurons and muscles. Reason (R) Chemicals enter the cell through receptor.

Answer»

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) Chemical messengers are chemicals that enable communication of message between two neurons or between neurons and muscles.
Reason (R) Chemicals enter the cell through receptor.

Discussion

25.	25.4 g of iodine and 14.2 g of chlorine are made to react completely to yield a mixture of ICl andICl3. Calculate the number of moles of ICl and ICl3 is formed
Answer» 25.4 g of iodine and 14.2 g of chlorine are made to react completely to yield a mixture of ICl and $I C l_{3}$ . Calculate the number of moles of ICl and $I C l_{3}$ is formed

25.

25.4 g of iodine and 14.2 g of chlorine are made to react completely to yield a mixture of ICl andICl3. Calculate the number of moles of ICl and ICl3 is formed

Answer»

25.4 g of iodine and 14.2 g of chlorine are made to react completely to yield a mixture of ICl and $I C l_{3}$ . Calculate the number of moles of ICl and $I C l_{3}$ is formed

Discussion

26.	The correct thermodynamic conditions for the spontaneous reaction at all temperatures is
Answer» The correct thermodynamic conditions for the spontaneous reaction at all temperatures is

Discussion

27.	In which of the following arrangements octahedral voids are formed ? (a) hcp (b) bcc (c) simple cubic (d) fcc
Answer» In which of the following arrangements octahedral voids are formed ? (a) hcp (b) bcc (c) simple cubic (d) fcc

27.

In which of the following arrangements octahedral voids are formed ? (a) hcp (b) bcc (c) simple cubic (d) fcc

Answer»

In which of the following arrangements octahedral voids are formed ?

(a) hcp (b) bcc (c) simple cubic (d) fcc

Discussion

28.	in a crystalline solid, anions B are arranged in a cubic close packing. cations are equally distributed between octahedral and tetrahedral voids. if all the octahedral voids are occupied, what is the formula of the solid
Answer» in a crystalline solid, anions B are arranged in a cubic close packing. cations are equally distributed between octahedral and tetrahedral voids. if all the octahedral voids are occupied, what is the formula of the solid

Discussion

29.	Laws of thermodynamics
Answer» Laws of thermodynamics

Discussion

30.	Calculate the oxidation number of Chlorine (Cl) in Ca(ClO2)2
Answer» Calculate the oxidation number of Chlorine $(C l)$ in $C a (C l O_{2})_{2}$

Discussion

31.	For an endothermic reaction where Δ H represents the enthalpy of the reaction in kJ mol−1, the minimum value for the energy of activation will be.
Answer» For an endothermic reaction where $Δ H$ represents the enthalpy of the reaction in $k J m o l^{- 1}$ , the minimum value for the energy of activation will be.

Discussion

32.	An atom X has three Valence Electrons and atom Y has 6 Valence Electrons. What is the formula of the compound formed between them?
Answer» An atom X has three Valence Electrons and atom Y has 6 Valence Electrons. What is the formula of the compound formed between them?

Discussion

33.	LiCl is more covalent than KCl. Why ?
Answer» LiCl is more covalent than KCl. Why ?

Discussion

34.	Why vsepr theory deals with only single covalent bonds and not as well with double and triple bonds??
Answer» Why vsepr theory deals with only single covalent bonds and not as well with double and triple bonds??

Discussion

35.	In the elevation of boiling point experiment, it is found that
Answer» In the elevation of boiling point experiment, it is found that

Discussion

36.	A 5 mL solution of 5 N H2SO4 is diluted to 250 mL. What will be the normality of H2SO4 in the diluted solution ?
Answer» A $5 m L$ solution of $5 N H_{2} S O_{4}$ is diluted to $250 m L$ . What will be the normality of $H_{2} S O_{4}$ in the diluted solution ?

Discussion

37.	Which of the following group IA metal(s) form complex hydrides?
Answer» Which of the following group IA metal(s) form complex hydrides?

Discussion

38.	The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially each of the wires has a length of 1 m at 10∘C. Now the end P is maintained at 10∘C, while the end S is heated and maintained at 400∘C. The system is thermally insulated from its surroundings. If the thermal conductivity of wire PQ is twice RS and the coefficient of linear thermal expansion of PQ is 1.2×10−5K−1, the change in length of the wire PQ is
Answer» The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially each of the wires has a length of $1 m$ at $10^{\circ} C$ . Now the end P is maintained at $10^{\circ} C$ , while the end S is heated and maintained at $400^{\circ} C$ . The system is thermally insulated from its surroundings. If the thermal conductivity of wire PQ is twice RS and the coefficient of linear thermal expansion of PQ is $1.2 \times 10^{- 5} K^{- 1}$ , the change in length of the wire PQ is

Discussion

39.	Find the difference in the number of unpaired electrons in a triplet and singlet carbene
Answer» Find the difference in the number of unpaired electrons in a triplet and singlet carbene

Discussion

40.	The correct set of four quantum numbers for the valence (outermost) electron of rubidium (Z=37) is:
Answer» The correct set of four quantum numbers for the valence (outermost) electron of rubidium $(Z = 37)$ is:

Discussion

41.	Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?
Answer» Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

Discussion

42.	Which of the following processes absorb energy?
Answer» Which of the following processes absorb energy?

Discussion

43.	Which of the following conditions are suitable for preparing benzyl chloride from toluene?
Answer» Which of the following conditions are suitable for preparing benzyl chloride from toluene?

Discussion

44.	A chemical reaction X⇌Y is said to be in equilibrium when -
Answer» A chemical reaction $X ⇌ Y$ is said to be in equilibrium when -

Discussion

45.	The state of hybridization of S in SO2 is similar to that of
Answer» The state of hybridization of S in $S O_{2}$ is similar to that of

Discussion

46.	Based on the given diagram, which of the following statements regarding the solutions to two miscible volatile liquids are correct? 1. Plots AD and BC show that Raoult’s law is obeyed for the solution in which B is a solvent and A is the solute and as well for that in which A is solvent and B is solute. 2. Plot CD shows that Dalton’s law of partial pressures is observed by the binary solutions of components A and B. 3. EF + EG = EH; and AC and BD corresponds to the vapour pressures of the pure solvents A and B, respectively. Select the correct answer using the codes given below Codes:
Answer» Based on the given diagram, which of the following statements regarding the solutions to two miscible volatile liquids are correct? 1. Plots AD and BC show that Raoult’s law is obeyed for the solution in which B is a solvent and A is the solute and as well for that in which A is solvent and B is solute. 2. Plot CD shows that Dalton’s law of partial pressures is observed by the binary solutions of components A and B. 3. EF + EG = EH; and AC and BD corresponds to the vapour pressures of the pure solvents A and B, respectively. Select the correct answer using the codes given below Codes:

Discussion

47.	On addition of ammonium chloride to a solution of ammonium hydroxide
Answer» On addition of ammonium chloride to a solution of ammonium hydroxide

47.

On addition of ammonium chloride to a solution of ammonium hydroxide

Answer»

On addition of ammonium chloride to a solution of ammonium hydroxide

Discussion

48.	An oxide of nitrogen has a molecular weight 92. Find the total number of electrons in one gram mole of that oxide
Answer» An oxide of nitrogen has a molecular weight 92. Find the total number of electrons in one gram mole of that oxide

Discussion

49.	The correct order of the decreasing ionic radii among the following isoelectronic species is [CBSE A1PMT 2010]
Answer» The correct order of the decreasing ionic radii among the following isoelectronic species is [CBSE A1PMT 2010]

Discussion

50.	It takes 495.8 kJ/mol of energy to ionize sodium. What frequency (s-1) and wavelength (nm) of light would be required to ionize sodium?
Answer» It takes 495.8 kJ/mol of energy to ionize sodium. What frequency (s^-1) and wavelength (nm) of light would be required to ionize sodium?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following structure(s) is/are meso-2,3 butanediol?

Which has maximum dipole moment ?

How many metallic ores are concentrated by the magnetic separation method from the given ores? Cassiterite, pyrolusite, rutile, magnetite, galena, cinnabar.

Which of the following oxides is not expected to react with sodium hydroxide?

Which of the following compounds has the highest enol content?

The volume of N2 at STP required to form a mono layer on the surface of an iron catalyst is 22.4 mL/g of the adsorbent. What will be the surface area of the adsorbent per g if each nitrogen molecule occupies 16×10−22 m2?

Explain the formation of n- type of semiconductor from silicon.

Consider an isothermal reversible compression of 1 mole of an ideal gas in which pressure of the system increased from 5 atm to 30 atm at 300 K. The entropy change (in kJ) of the surrounding is: (R=8.314 Jmol−1K−1)

A thermodynamical system is changed from state (P1,V1) to (P2,V2) by two different processes. The quantity which will remain same will be:

The correct order of relative stability of half-filled and completely filled sub-shell is:

In keto-enol tautomerism of 1,3-dicarbonyl compounds, the enol form is preferred in contrast to the keto-enol form, this is due to:

Enzymes having slightly different molecular structure but performing identical activity are

. The correct statement is

CH3−CH=C=CH−CH=CH−CH=C=CH−CH3 Find the number of stereoisomers of the given compound.

Alkyl halides can be obtained by all methods except for:

The number of equidistant oppositely charged ions in a sodium chloride crystal is[MP PET 2001]

Consider an endothermic reaction X → Y with the activation energies Eb and Ef for the backward and forward reactions respectively. In general

O2− and Si4+ are isoelectronic ions. If the ionic radius of O2− is 1.4∘A, that of Si4+ is

If the separation between the 1st the 5th layer in an ABCABC type crystal is n√227r (r = radius of atom), then n is

Which of the following is/are correct about ionic hydrides?

Electronic transitions in Li2+ ions take place from n2 to n1 shell such that:2n2+3n1=18 and 2n2−3n1=6. The total number of photons emitted when electrons transit to n1 shell is x (electrons do not fall lower than n1 shell) and number of photons emitted in the Balmer range is y. Find value of x+y.

The weakest bond among the following is _____.

25.4 g of iodine and 14.2 g of chlorine are made to react completely to yield a mixture of ICl andICl3. Calculate the number of moles of ICl and ICl3 is formed

The correct thermodynamic conditions for the spontaneous reaction at all temperatures is

In which of the following arrangements octahedral voids are formed ? (a) hcp (b) bcc (c) simple cubic (d) fcc

in a crystalline solid, anions B are arranged in a cubic close packing. cations are equally distributed between octahedral and tetrahedral voids. if all the octahedral voids are occupied, what is the formula of the solid

Laws of thermodynamics

Calculate the oxidation number of Chlorine (Cl) in Ca(ClO2)2

For an endothermic reaction where Δ H represents the enthalpy of the reaction in kJ mol−1, the minimum value for the energy of activation will be.

An atom X has three Valence Electrons and atom Y has 6 Valence Electrons. What is the formula of the compound formed between them?

LiCl is more covalent than KCl. Why ?

Why vsepr theory deals with only single covalent bonds and not as well with double and triple bonds??

In the elevation of boiling point experiment, it is found that

A 5 mL solution of 5 N H2SO4​ is diluted to 250 mL. What will be the normality of H2SO4 in the diluted solution ?

Which of the following group IA metal(s) form complex hydrides?

Find the difference in the number of unpaired electrons in a triplet and singlet carbene

The correct set of four quantum numbers for the valence (outermost) electron of rubidium (Z=37) is:

Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

Which of the following processes absorb energy?

Which of the following conditions are suitable for preparing benzyl chloride from toluene?

A chemical reaction X⇌Y is said to be in equilibrium when -

The state of hybridization of S in SO2 is similar to that of

On addition of ammonium chloride to a solution of ammonium hydroxide

An oxide of nitrogen has a molecular weight 92. Find the total number of electrons in one gram mole of that oxide

The correct order of the decreasing ionic radii among the following isoelectronic species is [CBSE A1PMT 2010]

It takes 495.8 kJ/mol of energy to ionize sodium. What frequency (s-1) and wavelength (nm) of light would be required to ionize sodium?

A 5 mL solution of 5 N H2SO4 is diluted to 250 mL. What will be the normality of H2SO4 in the diluted solution ?