46295 + Interview Questions in Chemistry

1.	The compressibility of a gas is less than unity at STP. Therefore:
Answer» The compressibility of a gas is less than unity at STP. Therefore:

Discussion

2.	The oxidation state of S in Na2S2O3 is
Answer» The oxidation state of $S$ in $N a_{2} S_{2} O_{3}$ is

Discussion

3.	For the reaction, 2A(g)+B(g)⇌A2B(g) for which ΔS=5.0 J/K, K=1.0×10−10, and T=300 K, ΔEo will be:
Answer» For the reaction, $2 A (g) + B (g) ⇌ A_{2} B (g)$ for which $Δ S = 5.0 J / K$ , $K = 1.0 \times 10^{- 10}$ , and $T = 300 K$ , $Δ E^{o}$ will be:

Discussion

4.	From the following pairs, which has the first structure more contributing toward resonance hybrid than the second?
Answer» From the following pairs, which has the first structure more contributing toward resonance hybrid than the second?

Discussion

5.	For substances hysteresis (B - H) curves are given as shown in figure. For making temporary magnet which of the following is best.
Answer» For substances hysteresis (B - H) curves are given as shown in figure. For making temporary magnet which of the following is best.

Discussion

6.	In the reaction CH3CNNa,C2H5OH−−−−−−−−→XHNO2−−−−→YTollens−−−−−→ReagentZ 'Z' is
Answer» In the reaction $C H_{3} C N N a, C_{2} H_{5} O H - ------- \to X H N O_{2} - --- \to Y T o l l e n s - ---- \to R e a g e n t Z$ 'Z' is

Discussion

7.	Mark the oxide which is amphoteric in character
Answer» Mark the oxide which is amphoteric in character

Discussion

8.	CH3−CH2−CH=CH−CH2−CH3 What is the IUPAC name of the following compound?
Answer» $C H_{3} - C H_{2} - C H = C H - C H_{2} - C H_{3}$ What is the IUPAC name of the following compound?

Discussion

9.	Locate the image of the point P as seen by the eye in the figure.
Answer» Locate the image of the point P as seen by the eye in the figure.

9.

Locate the image of the point P as seen by the eye in the figure.

Answer»

Locate the image of the point P as seen by the eye in the figure.

Discussion

10.	Which of the following essential elements also acts as an electron carrier?
Answer» Which of the following essential elements also acts as an electron carrier?

Discussion

11.	Which of the following is not an antibiotic
Answer» Which of the following is not an antibiotic

Discussion

12.	Identify the final products from the following:
Answer» Identify the final products from the following:

Discussion

13.	When MgSO4and NH4Cl are added along with Na3PO4, a white precipitate is formed. What is it?
Answer» When $M g S O_{4}$ and $N H_{4} C l$ are added along with $N a_{3} P O_{4}$ , a white precipitate is formed. What is it?

Discussion

14.	The extent of ionization increases
Answer» The extent of ionization increases

Discussion

15.	Quartz is a crystalline variety of
Answer» Quartz is a crystalline variety of

Discussion

16.	Which of the following colloids cannot be easily coagulated?
Answer» Which of the following colloids cannot be easily coagulated?

Discussion

17.	The three dimensional graph of lattice points which sets the pattern for the whole lattice is called
Answer» The three dimensional graph of lattice points which sets the pattern for the whole lattice is called

Discussion

18.	Which of the following products is formed when PCl3 is hydrolyzed with H2O?
Answer» Which of the following products is formed when $P C l_{3}$ is hydrolyzed with $H_{2} O$ ?

Discussion

19.	The mass of a litre of oxygen at STP was 1.43g and that of a litre of sodium hydroxide is 2.857g. I) How many molecules of each gas are there in this volume? II) What is the mass in grams for a single molecule of each gas?
Answer» The mass of a litre of oxygen at STP was 1.43g and that of a litre of sodium hydroxide is 2.857g. I) How many molecules of each gas are there in this volume? II) What is the mass in grams for a single molecule of each gas?

19.

The mass of a litre of oxygen at STP was 1.43g and that of a litre of sodium hydroxide is 2.857g. I) How many molecules of each gas are there in this volume? II) What is the mass in grams for a single molecule of each gas?

Answer»

The mass of a litre of oxygen at STP was 1.43g and that of a litre of sodium hydroxide is 2.857g.

I) How many molecules of each gas are there in this volume?

II) What is the mass in grams for a single molecule of each gas?

Discussion

20.	The species present in the solution when CO2 is dissolved in water are:
Answer» The species present in the solution when $C O_{2}$ is dissolved in water are:

Discussion

21.	Consider the following reversible reaction, A(g)+B(g)⇌AB(g).The activation energy of the backward reaction exceeds that of the forward reaction by 2RT inJmol−1. If the pre-exponential factor for the forward reaction is 4 times that of the reverse reaction, the absolute value of ΔGθ(inJmol−1) for the reaction at 300 K is. (Given; ln(2) =0.7, RT=2500Jmol−1 at 300 K and G is the Gibbs energy)
Answer» Consider the following reversible reaction, $A (g) + B (g) ⇌ A B (g)$ .The activation energy of the backward reaction exceeds that of the forward reaction by 2RT $i n J m o l^{- 1}$ . If the pre-exponential factor for the forward reaction is 4 times that of the reverse reaction, the absolute value of $Δ G^{θ} (i n J m o l^{- 1})$ for the reaction at 300 K is. (Given; ln(2) =0.7, $R T = 2500 J m o l^{- 1}$ at 300 K and G is the Gibbs energy)

Discussion

22.	Some of the group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides the one which is soluble in enthanol is (a) BeCl2 (b) MgCl2 (c) CaCl2 (d) SrCl2
Answer» Some of the group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides the one which is soluble in enthanol is (a) $B e C l_{2}$ (b) $M g C l_{2}$ (c) $C a C l_{2}$ (d) $S r C l_{2}$

Discussion

23.	The number of isomers of the compound C2FClBrI is:
Answer» The number of isomers of the compound $C_{2} F C l B r I$ is:

Discussion

24.	In the breakdown of the ozone layer, ozone directly reacts with [1] a) ultraviolet light b) chlorine atoms c) oxygen atoms d) CFC molecules
Answer» In the breakdown of the ozone layer, ozone directly reacts with [1] a) ultraviolet light b) chlorine atoms c) oxygen atoms d) CFC molecules

Discussion

25.	Which of the following compound has maximum boiling point
Answer» Which of the following compound has maximum boiling point

Discussion

26.	Tetragonal crystal system has the following unit cell dimensions[MP PMT 1993]
Answer» Tetragonal crystal system has the following unit cell dimensions [MP PMT 1993]

26.

Tetragonal crystal system has the following unit cell dimensions[MP PMT 1993]

Answer»

Tetragonal crystal system has the following unit cell dimensions

[MP PMT 1993]

Discussion

27.	In a thermodynamics process, pressure of a fixed mass of gas is changed in such a manner that the gas releases 30 joule of heat and 18 joule of work was done on the gas. If the initial internal energy of the gas was 60 joule, then the final internal energy will be
Answer» In a thermodynamics process, pressure of a fixed mass of gas is changed in such a manner that the gas releases 30 joule of heat and 18 joule of work was done on the gas. If the initial internal energy of the gas was 60 joule, then the final internal energy will be

Discussion

28.	pH of a solution produced when an aqueous solution of pH=6 is mixed with an equal volume of an aqueous solution of pH=3 is: (Given:log5.005=0.6994)
Answer» $p H$ of a solution produced when an aqueous solution of $p H = 6$ is mixed with an equal volume of an aqueous solution of $p H = 3$ is: $(Given : log 5.005 = 0.6994)$

Discussion

29.	In a given energy level, the order of penetration effect of different orbitals is:
Answer» In a given energy level, the order of penetration effect of different orbitals is:

Discussion

30.	Which graph represents the correct trend in atomic radii of transition elements?
Answer» Which graph represents the correct trend in atomic radii of transition elements?

Discussion

31.	A piano wire weighing 6.00 g and having a length of 900 cm emits a fundamental frequency corresponding to the "Middle C" (v = 261.63 Hz). Find the tension in the wire.
Answer» A piano wire weighing 6.00 g and having a length of 900 cm emits a fundamental frequency corresponding to the "Middle C" (v = 261.63 Hz). Find the tension in the wire.

Discussion

32.	Write the unit of equilibrium constant (Kc) for the given reaction. C(s)+12O2(g)→CO2(g)
Answer» Write the unit of equilibrium constant $(K_{c})$ for the given reaction. $C (s) + \frac{1}{2} O_{2} (g) \to C O_{2} (g)$

Discussion

33.	Which connector can be used to soften the effect of the information in the sentence? ___________ the book that you are looking for has been issued.
Answer» Which connector can be used to soften the effect of the information in the sentence? ___________ the book that you are looking for has been issued.

33.

Which connector can be used to soften the effect of the information in the sentence? ___________ the book that you are looking for has been issued.

Answer»

Which connector can be used to soften the effect of the information in the sentence?

___________ the book that you are looking for has been issued.

Discussion

34.	A metal M readily forms sulphate MSO4 which is water soluble. It forms oxide MO which becomes inert on heating. It forms insoluble hydroxide which is soluble in NaOH. The metal M is:
Answer» A metal $M$ readily forms sulphate $M S O_{4}$ which is water soluble. It forms oxide $M O$ which becomes inert on heating. It forms insoluble hydroxide which is soluble in $N a O H$ . The metal $M$ is:

Discussion

35.	Suggest a list of the substances where carbon can exhibit oxidation states from –4 to +4 and nitrogen from –3 to +5.
Answer» Suggest a list of the substances where carbon can exhibit oxidation states from –4 to +4 and nitrogen from –3 to +5.

Discussion

36.	What is the difference between mist and fume?
Answer» What is the difference between mist and fume?

Discussion

37.	The product P should be
Answer» The product P should be

Discussion

38.	The same mass of aluminium is drawn into two wires 1mm and 2mm thick.The two wires are connected in series and current is passed through them.Heat produced in wire is in the ratio 1)16/1 2)8/32 3)8/2 4)4/2
Answer» The same mass of aluminium is drawn into two wires 1mm and 2mm thick.The two wires are connected in series and current is passed through them.Heat produced in wire is in the ratio 1)16/1 2)8/32 3)8/2 4)4/2

38.

The same mass of aluminium is drawn into two wires 1mm and 2mm thick.The two wires are connected in series and current is passed through them.Heat produced in wire is in the ratio 1)16/1 2)8/32 3)8/2 4)4/2

Answer»

The same mass of aluminium is drawn into two wires 1mm and 2mm thick.The two wires are connected in series and current is passed through them.Heat produced in wire is in the ratio

1)16/1

2)8/32

3)8/2

4)4/2

Discussion

39.	The only correct combination for the Stephen’s reaction
Answer» The only correct combination for the Stephen’s reaction

Discussion

40.	Which of the following does not react with sodium bisulphite ?
Answer» Which of the following does not react with sodium bisulphite ?

Discussion

41.	A certain metal was initiated with light of frequency 3.2×1016 Hz. The photoelectrons emitted had twice the kinetic energy as the same metal was irradiated with light of frequency 2×1016Hz. Calculate the threshold frequency.
Answer» A certain metal was initiated with light of frequency 3.2×10¹⁶Hz. The photoelectrons emitted had twice the kinetic energy as the same metal was irradiated with light of frequency 2×10¹⁶Hz. Calculate the threshold frequency.

Discussion

42.	Explain the valence bond theory with example
Answer» Explain the valence bond theory with example

Discussion

43.	Calculate molar conductivity for NH4OH(Scm2mol–1), given that molar conductivity for Ba(OH)2,BaCl2 and NH4Cl for 523.28, 280.0 and 129.8 Scm2 mol–1 respectively.
Answer» Calculate molar conductivity for $N H_{4} O H (S c m^{2} m o l^{- 1})$ , given that molar conductivity for $B a (O H)_{2}, B a C l_{2}$ and $N H_{4} C l$ for 523.28, 280.0 and 129.8 $S c m^{2} m o l^{- 1}$ respectively.

Discussion

44.	Trick to find oxidation state of elements in redox reactions
Answer» Trick to find oxidation state of elements in redox reactions

Discussion

45.	An electric current is passed through an aqueous solution (buffered at pH = 6.0) of alanine (pl - 6.0) and ariginine (pl = 10.2). The two amino acids can be separated because ?
Answer» An electric current is passed through an aqueous solution (buffered at pH = 6.0) of alanine (pl - 6.0) and ariginine (pl = 10.2). The two amino acids can be separated because ?

Discussion

46.	There are 14 elements in the actinoid series. Which of the following elements does not belong to this series?
Answer» There are 14 elements in the actinoid series. Which of the following elements does not belong to this series?

Discussion

47.	What is the standard potential of the Tl3+/Tlelectrode? Tl3++2e−→Tl+ E0=1.26 VTl++e−→Tl E0=−0.336 V
Answer» What is the standard potential of the $T l^{3 +} / T l$ electrode? $T l^{3 +} + 2 e^{-} \to T l^{+} E^{0} = 1.26 V T l^{+} + e^{-} \to T l E^{0} = - 0.336 V$

47.

What is the standard potential of the Tl3+/Tlelectrode? Tl3++2e−→Tl+ E0=1.26 VTl++e−→Tl E0=−0.336 V

Answer»

What is the standard potential of the $T l^{3 +} / T l$ electrode?

$T l^{3 +} + 2 e^{-} \to T l^{+} E^{0} = 1.26 V T l^{+} + e^{-} \to T l E^{0} = - 0.336 V$

Discussion

48.	Factorise 2(ab+cd)−a2−b2+c2+d2
Answer» Factorise $2 (a b + c d) - a^{2} - b^{2} + c^{2} + d^{2}$

Discussion

49.	What is the solvation? Is this possible only for ionic compounds?.If not explain how this works for both ionic and covalent compounds.
Answer» What is the solvation? Is this possible only for ionic compounds?.If not explain how this works for both ionic and covalent compounds.

Discussion

50.	The hydration energy of Mg2+ is greater than that of .
Answer» The hydration energy of Mg2+ is greater than that of .

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The compressibility of a gas is less than unity at STP. Therefore:

The oxidation state of S in Na2S2O3 is

For the reaction, 2A(g)+B(g)⇌A2B(g) for which ΔS=5.0 J/K, K=1.0×10−10, and T=300 K, ΔEo will be:

From the following pairs, which has the first structure more contributing toward resonance hybrid than the second?

For substances hysteresis (B - H) curves are given as shown in figure. For making temporary magnet which of the following is best.

In the reaction CH3CNNa,C2H5OH−−−−−−−−→XHNO2−−−−→YTollens−−−−−→ReagentZ 'Z' is

Mark the oxide which is amphoteric in character

CH3−CH2−CH=CH−CH2−CH3 What is the IUPAC name of the following compound?

Locate the image of the point P as seen by the eye in the figure.

Which of the following essential elements also acts as an electron carrier?

Which of the following is not an antibiotic

Identify the final products from the following:

When MgSO4and NH4Cl are added along with Na3PO4, a white precipitate is formed. What is it?

The extent of ionization increases

Quartz is a crystalline variety of

Which of the following colloids cannot be easily coagulated?

The three dimensional graph of lattice points which sets the pattern for the whole lattice is called

Which of the following products is formed when PCl3 is hydrolyzed with H2O?

The mass of a litre of oxygen at STP was 1.43g and that of a litre of sodium hydroxide is 2.857g. I) How many molecules of each gas are there in this volume? II) What is the mass in grams for a single molecule of each gas?

The species present in the solution when CO2 is dissolved in water are:

Some of the group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides the one which is soluble in enthanol is (a) BeCl2 (b) MgCl2 (c) CaCl2 (d) SrCl2

The number of isomers of the compound C2FClBrI is:

In the breakdown of the ozone layer, ozone directly reacts with [1] a) ultraviolet light b) chlorine atoms c) oxygen atoms d) CFC molecules

Which of the following compound has maximum boiling point

Tetragonal crystal system has the following unit cell dimensions[MP PMT 1993]

In a thermodynamics process, pressure of a fixed mass of gas is changed in such a manner that the gas releases 30 joule of heat and 18 joule of work was done on the gas. If the initial internal energy of the gas was 60 joule, then the final internal energy will be

pH of a solution produced when an aqueous solution of pH=6 is mixed with an equal volume of an aqueous solution of pH=3 is: (Given:log5.005=0.6994)

In a given energy level, the order of penetration effect of different orbitals is:

Which graph represents the correct trend in atomic radii of transition elements?

A piano wire weighing 6.00 g and having a length of 900 cm emits a fundamental frequency corresponding to the "Middle C" (v = 261.63 Hz). Find the tension in the wire.

Write the unit of equilibrium constant (Kc) for the given reaction. C(s)+12O2(g)→CO2(g)

Which connector can be used to soften the effect of the information in the sentence? ___________ the book that you are looking for has been issued.

A metal M readily forms sulphate MSO4 which is water soluble. It forms oxide MO which becomes inert on heating. It forms insoluble hydroxide which is soluble in NaOH. The metal M is:

Suggest a list of the substances where carbon can exhibit oxidation states from –4 to +4 and nitrogen from –3 to +5.

What is the difference between mist and fume?

The product P should be

The same mass of aluminium is drawn into two wires 1mm and 2mm thick.The two wires are connected in series and current is passed through them.Heat produced in wire is in the ratio 1)16/1 2)8/32 3)8/2 4)4/2

The only correct combination for the Stephen’s reaction

Which of the following does not react with sodium bisulphite ?

A certain metal was initiated with light of frequency 3.2×1016 Hz. The photoelectrons emitted had twice the kinetic energy as the same metal was irradiated with light of frequency 2×1016Hz. Calculate the threshold frequency.

Explain the valence bond theory with example

Calculate molar conductivity for NH4OH(Scm2mol–1), given that molar conductivity for Ba(OH)2,BaCl2 and NH4Cl for 523.28, 280.0 and 129.8 Scm2 mol–1 respectively.

Trick to find oxidation state of elements in redox reactions

An electric current is passed through an aqueous solution (buffered at pH = 6.0) of alanine (pl - 6.0) and ariginine (pl = 10.2). The two amino acids can be separated because ?

There are 14 elements in the actinoid series. Which of the following elements does not belong to this series?

What is the standard potential of the Tl3+/Tlelectrode? Tl3++2e−→Tl+ E0=1.26 VTl++e−→Tl E0=−0.336 V

Factorise 2(ab+cd)−a2−b2+c2+d2

What is the solvation? Is this possible only for ionic compounds?.If not explain how this works for both ionic and covalent compounds.

The hydration energy of Mg2+ is greater than that of .