46295 + Interview Questions in Chemistry

1.	Which of the assumption of the kinetic - molecular theory best explains Daltons law of partial pressure?
Answer» Which of the assumption of the kinetic - molecular theory best explains Daltons law of partial pressure?

Discussion

2.	The set with the correct order of acidic strength is:
Answer» The set with the correct order of acidic strength is:

Discussion

3.	Heating of an ore in the presence of air to remove impurities containing sulphur is called:
Answer» Heating of an ore in the presence of air to remove impurities containing sulphur is called:

Discussion

4.	Which of the following halogen acids is least acidic
Answer» Which of the following halogen acids is least acidic

4.

Which of the following halogen acids is least acidic

Answer»

Which of the following halogen acids is least acidic

Discussion

5.	Two Gases X and Y have densities dx=3dy and Molecular Masses ,Mx=0.5My. Then, the ratio of their pressures, i.e. Px:Py would be
Answer» Two Gases X and Y have densities $d_{x} = 3 d_{y}$ and Molecular Masses , $M_{x} = 0.5 M_{y}$ . Then, the ratio of their pressures, i.e. $P_{x} : P_{y}$ would be

Discussion

6.	The substances which are added to stabilizes the emulsions are called:
Answer» The substances which are added to stabilizes the emulsions are called:

Discussion

7.	'Z' in the following sequence of reactions is C6H6HNO3/H2SO4−−−−−−−−−→ΔWZn/HCl−−−−−→XNaNO2−−−−→HClYH3PO2/H2O−−−−−−−−→Z
Answer» 'Z' in the following sequence of reactions is $C_{6} H_{6} H N O_{3} / H_{2} S O_{4} - -------- \to Δ W Z n / H C l - ---- \to X N a N O_{2} - --- \to H C l Y H_{3} P O_{2} / H_{2} O - ------- \to Z$

Discussion

8.	Chloride shift is also known as
Answer» Chloride shift is also known as

Discussion

9.	Sodium metal crystallizes in body centred cubic lattice with the edge length a=4.29. The radius of sodium atom is:
Answer» Sodium metal crystallizes in body centred cubic lattice with the edge length a=4.29. The radius of sodium atom is:

Discussion

10.	Which of the following is not formed when H2S reacts with acidic K2Cr2O7 solutions?
Answer» Which of the following is not formed when $H_{2} S$ reacts with acidic $K_{2} C r_{2} O_{7}$ solutions?

Discussion

11.	The simplest formula of a compound containing 50% of element X (atomic mass 10) and 50% of element Y (atomic mass 20) is
Answer» The simplest formula of a compound containing $50 %$ of element X (atomic mass 10) and $50 %$ of element Y (atomic mass 20) is

Discussion

12.	The dipole moment is the highest for
Answer» The dipole moment is the highest for

12.

The dipole moment is the highest for

Answer»

The dipole moment is the highest for

Discussion

13.	Let us consider a metal with work function 4.64 eV. If this metal is irradiated with photons having energy 10.42×10−19 J then the wavelength associated with an ejected electron is x×10−9 m. What is the nearest interger value of x?
Answer» Let us consider a metal with work function 4.64 eV. If this metal is irradiated with photons having energy $10.42 \times 10^{- 19} J$ then the wavelength associated with an ejected electron is $x \times 10^{- 9} m$ . What is the nearest interger value of $x$ ?

Discussion

14.	Cf2+,Es2+,Fm2+,Md2+ and No2+ have the properties similar to that of alkaline earth metal
Answer» $C f^{2 +}, E s^{2 +}, F m^{2 +}, M d^{2 +} a n d N o^{2 +}$ have the properties similar to that of alkaline earth metal

Discussion

15.	The wavelength of the third line of the Balmer series for a hydrogen atom is:
Answer» The wavelength of the third line of the Balmer series for a hydrogen atom is:

Discussion

16.	Using equation of pressure of gas, prove the gas laws
Answer» Using equation of pressure of gas, prove the gas laws

Discussion

17.	Which of the following would yield butan-1-ol?
Answer» Which of the following would yield butan-1-ol?

Discussion

18.	In the following reaction, A is an intermediate while B is the product. A and B respectively are:
Answer» In the following reaction, A is an intermediate while B is the product. A and B respectively are:

Discussion

19.	Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same room temperature and pressure. The ratio of total number of atoms of these gases present in different flasks would be
Answer» Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same room temperature and pressure. The ratio of total number of atoms of these gases present in different flasks would be

Discussion

20.	How many ions per molecule are produced in the solution when Mohr salt is dissolved in excess of water?
Answer» How many ions per molecule are produced in the solution when Mohr salt is dissolved in excess of water?

Discussion

21.	How does pressure affect the formation of supersaturated solutions with example?
Answer» How does pressure affect the formation of supersaturated solutions with example?

Discussion

22.	Amino group is ortho, para directing for aromatic electrophilic substitution. On nitration of aniline with concentrated acids, a good amount of meta nitro aniline is obtained. This is due to
Answer» Amino group is ortho, para directing for aromatic electrophilic substitution. On nitration of aniline with concentrated acids, a good amount of meta nitro aniline is obtained. This is due to

Discussion

23.	Which of the following is formed when a suspension of powdered colemanite is saturated with SO2 gas.
Answer» Which of the following is formed when a suspension of powdered colemanite is saturated with $S O_{2}$ gas.

Discussion

24.	In the Hofmann bromamide degradation reaction, the number of moles of NaOHand Br2used per mole of amine produced are:
Answer» In the Hofmann bromamide degradation reaction, the number of moles of $N a O H$ and $B r_{2}$ used per mole of amine produced are:

Discussion

25.	The basic character of hydroxides of alkaline earth metals increase in the order:
Answer» The basic character of hydroxides of alkaline earth metals increase in the order:

Discussion

26.	Chlorobenzene is
Answer» Chlorobenzene is

Discussion

27.	Sodium sulphate is soluble in water but barium sulphate is insoluble because
Answer» Sodium sulphate is soluble in water but barium sulphate is insoluble because

Discussion

28.	Suggest reasons why the B–F bond lengths in BF3 (130 pm) and BF−4 (143 pm) differ.
Answer» Suggest reasons why the B–F bond lengths in $B F_{3}$ (130 pm) and $B F_{4}^{-}$ (143 pm) differ.

Discussion

29.	What is the freezing point of a solution containing 8.1 g HBr in 100g water assuming the acid to be 90% ionised (Kf for water =1.86 Kmole-1)
Answer» What is the freezing point of a solution containing 8.1 g HBr in 100g water assuming the acid to be 90% ionised (K_f for water =1.86 Kmole^-1)

Discussion

30.	The correct IUPAC name of the given compound is I−C\|F=C\|Cl−C≡C−OCH3
Answer» The correct IUPAC name of the given compound is $I - C \| F = C \| C l - C \equiv C - O C H_{3}$

Discussion

31.	Two moles of PCl5 were heated to 327oC in a closed two litre vessel and when equilibrium was achieved, PCl5 was found to be 40% dissociated into PCl3 and Cl2. Calculate the equilibrium constant (KC) for the reaction
Answer» Two moles of $P C l_{5}$ were heated to $327^{o} C$ in a closed two litre vessel and when equilibrium was achieved, $P C l_{5}$ was found to be 40% dissociated into $P C l_{3}$ and $C l_{2} .$ Calculate the equilibrium constant $(K_{C})$ for the reaction

Discussion

32.	Metallic tin in the presence of HCl is oxidized by K2Cr2O7 to stannic chloride, SnCl4. What volume of deci-normal dichromate solution would be required by 11.9 g of tin? (Atomic mass of Sn =119 u)
Answer» Metallic tin in the presence of $H C l$ is oxidized by $K_{2} C r_{2} O_{7}$ to stannic chloride, $S n C l_{4}$ . What volume of deci-normal dichromate solution would be required by $11.9 g$ of tin? (Atomic mass of Sn $= 119 u$ )

Discussion

33.	Light of wavelength 12818∘A is emitted when the electron of a hydrogen atom drops from 5th to 3rd orbit. Find the wavelength of the photon emitted when the electron falls from 3rd to 2nd orbit.
Answer» Light of wavelength $12818 \circ A$ is emitted when the electron of a hydrogen atom drops from 5th to 3rd orbit. Find the wavelength of the photon emitted when the electron falls from 3rd to 2nd orbit.

Discussion

34.	The number of possible isomers for the complex [Co(en)2Cl2]Cl will be: (en = ethylenediamine)
Answer» The number of possible isomers for the complex $[C o (e n)_{2} C l_{2}] C l$ will be: ( $e n$ = ethylenediamine)

Discussion

35.	Which of the following is correct in terms of increasing work done for the same initial and final state?
Answer» Which of the following is correct in terms of increasing work done for the same initial and final state?

Discussion

36.	A charged dust particle of radius 5×10−7 m is located in a horizontal electric field of intensity 6.28×105 V/m. The surrounding medium is air with coefficient of viscosity 1.6×10−5 Ns/m2. The particle moves with a uniform horizontal speed of 0.02 m/s, then the number of excess electrons on the particle must be 10n. Here n=
Answer» A charged dust particle of radius $5 \times 10^{- 7} m$ is located in a horizontal electric field of intensity $6.28 \times 10^{5} V / m$ . The surrounding medium is air with coefficient of viscosity $1.6 \times 10^{- 5} N s / m^{2}$ . The particle moves with a uniform horizontal speed of $0.02 m / s$ , then the number of excess electrons on the particle must be $10 n$ . Here $n =$

Discussion

37.	The standard heats of formation of NO2 (g) and N2O4 (g) are 8.0 and 2.0 kcal mol−1 respectively, the heat of dimerization of NO2 in kcal is
Answer» The standard heats of formation of $N O_{2}$ (g) and $N_{2} O_{4}$ (g) are $8.0$ and $2.0 k c a l m o l^{- 1}$ respectively, the heat of dimerization of $N O_{2}$ in $k c a l$ is

Discussion

38.	Photon having energy equivalent to the binding energy of 4th state of He+ atom is used to eject an electron from the metal surface of work function 1.4 eV. If electrons are further accelerated through the potential difference of 4 V then the minimum value of De - broglie wavelength (in oA) associated with the electron is: (Given √174.72=13.24, take h=6.62×10−34 Js
Answer» Photon having energy equivalent to the binding energy of $4^{t h}$ state of $H e^{+}$ atom is used to eject an electron from the metal surface of work function 1.4 eV. If electrons are further accelerated through the potential difference of $4 V$ then the minimum value of De - broglie wavelength (in $o A$ ) associated with the electron is: (Given $\sqrt{174.72} = 13.24$ , take $h = 6.62 \times 10^{- 34} J s$

Discussion

39.	An ideal gas expands in volume from 10-3m3 to 10-2m-3 at 300K against a constant pressure of 105Nm-2.The work done is?
Answer» An ideal gas expands in volume from 10^-3m³ to 10^-2m^-3 at 300K against a constant pressure of 10⁵Nm^-2.The work done is?

Discussion

40.	The solubility product of a sparingly soluble salt A2B is 3.2×10−11. Its solubility in molL−1 is:
Answer» The solubility product of a sparingly soluble salt $A_{2} B$ is $3.2 \times 10^{- 11}$ . Its solubility in $m o l L^{- 1}$ is:

Discussion

41.	A 0.5 dm3 flask contains gas A and a 1 dm3 flask contains gas B at the same temperature. If the density of A=3 g.dm−3, that of B=1.5 g.dm−3 and the molar mass of A=12 B, the ratio of pressures exerted by the gases is:
Answer» A $0.5 {dm}^{3}$ flask contains gas A and a $1 {dm}^{3}$ flask contains gas B at the same temperature. If the density of $A = 3 {g.dm}^{- 3}$ , that of $B = 1.5 {g.dm}^{- 3}$ and the molar mass of $A = \frac{1}{2}$ B, the ratio of pressures exerted by the gases is:

Discussion

42.	Which of these methods would serve to prepare 1-Phenyl-2-propanol? a.Addition of benzyl Grignard reagent to acetaldehyde (ethanal),followed by hydrolysis.b.Addition of phenyl lithium to propylene oxide (methyloxirane),followed by hydrolysis.c.Addition of phenyl Grignard reagent to acetone (2- propanone)followed by hydrolysis.d.Acid- catalysed hydration (addition of water to) of 2-Phenyl-1-propene.e.Addition of methyl Grignard reagent to acetophenone (methyl phenylketone), followed by hydrolysis.f.Addition of methyl Grignard reagent to phenylacetaldehyde, followedby hydrolysis.
Answer» Which of these methods would serve to prepare 1-Phenyl-2-propanol? $\begin{matrix} a. & Addition of benzyl Grignard reagent to acetaldehyde (ethanal), followed by hydrolysis. b. & Addition of phenyl lithium to propylene oxide (methyloxirane), followed by hydrolysis. c. & Addition of phenyl Grignard reagent to acetone (2- propanone) followed by hydrolysis. d. & Acid- catalysed hydration (addition of water to) of 2-Phenyl-1- propene. e. & Addition of methyl Grignard reagent to acetophenone (methyl phenyl ketone), followed by hydrolysis. f. & Addition of methyl Grignard reagent to phenylacetaldehyde, followed by hydrolysis. \end{matrix}$

Discussion

43.	Liquids A and B form an ideal solution in the entire composition range. AT 350 K, the vapour pressures of pure A and pure B are 7×103 Pa and 12×103 Pa, respectively. The composition of the vapour, in equilibrium with a solution containing 40 mole percent of A at this temperature is:
Answer» Liquids A and B form an ideal solution in the entire composition range. AT 350 K, the vapour pressures of pure A and pure B are $7 \times 10^{3}$ Pa and $12 \times 10^{3}$ Pa, respectively. The composition of the vapour, in equilibrium with a solution containing 40 mole percent of A at this temperature is:

Discussion

44.	Given: N2(g)+3H2(g)⇌2NH3(g);K1 N2(g)+O2(g)⇌2NO(g);K2 H2(g)+12O2(g)⇌H2O(g);K3 The equilibrium constant for 2NH3(g)+52O2(g)⇌2NO(g)+3H2O(g) will be:
Answer» Given: $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g); K_{1}$ $N_{2} (g) + O_{2} (g) ⇌ 2 N O (g); K_{2}$ $H_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ H_{2} O (g); K_{3}$ The equilibrium constant for $2 N H_{3} (g) + \frac{5}{2} O_{2} (g) ⇌ 2 N O (g) + 3 H_{2} O (g)$ will be:

Discussion

45.	Why no of carbon is doubled during the wurtz reaction
Answer» Why no of carbon is doubled during the wurtz reaction

Discussion

46.	Difference between aldehydes and carboxylic acids?
Answer» Difference between aldehydes and carboxylic acids?

Discussion

47.	If orbital is defined as a region of an atom where electron may be found ,it will have physical significance. And if orbital is Defined as an equation (wave function)then it will not have physical significance .is this right?
Answer» If orbital is defined as a region of an atom where electron may be found ,it will have physical significance. And if orbital is Defined as an equation (wave function)then it will not have physical significance .is this right?

Discussion

48.	Which of the following compounds is asymmetric?
Answer» Which of the following compounds is asymmetric?

Discussion

49.	Q47. The polymetallic nodules contain: 1. Iron 2. Mangnese 3. Rare Earth Metals Which of the above statement(s) is/are correct?
Answer» Q47. The polymetallic nodules contain: 1. Iron 2. Mangnese 3. Rare Earth Metals Which of the above statement(s) is/are correct?

49.

Q47. The polymetallic nodules contain: 1. Iron 2. Mangnese 3. Rare Earth Metals Which of the above statement(s) is/are correct?

Answer»

Q47. The polymetallic nodules contain:

1. Iron 2. Mangnese

3. Rare Earth Metals

Which of the above statement(s) is/are correct?

Discussion

50.	The potential of a Standard Hydrogen Electrode is
Answer» The potential of a Standard Hydrogen Electrode is

50.

The potential of a Standard Hydrogen Electrode is

Answer»

The potential of a Standard Hydrogen Electrode

is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the assumption of the kinetic - molecular theory best explains Daltons law of partial pressure?

The set with the correct order of acidic strength is:

Heating of an ore in the presence of air to remove impurities containing sulphur is called:

Which of the following halogen acids is least acidic

Two Gases X and Y have densities dx=3dy and Molecular Masses ,Mx=0.5My. Then, the ratio of their pressures, i.e. Px:Py would be

The substances which are added to stabilizes the emulsions are called:

'Z' in the following sequence of reactions is C6H6HNO3/H2SO4−−−−−−−−−→ΔWZn/HCl−−−−−→XNaNO2−−−−→HClYH3PO2/H2O−−−−−−−−→Z

Chloride shift is also known as

Sodium metal crystallizes in body centred cubic lattice with the edge length a=4.29. The radius of sodium atom is:

Which of the following is not formed when H2S reacts with acidic K2Cr2O7 solutions?

The simplest formula of a compound containing 50% of element X (atomic mass 10) and 50% of element Y (atomic mass 20) is

The dipole moment is the highest for

Let us consider a metal with work function 4.64 eV. If this metal is irradiated with photons having energy 10.42×10−19 J then the wavelength associated with an ejected electron is x×10−9 m. What is the nearest interger value of x?

Cf2+,Es2+,Fm2+,Md2+ and No2+ have the properties similar to that of alkaline earth metal

The wavelength of the third line of the Balmer series for a hydrogen atom is:

Using equation of pressure of gas, prove the gas laws

Which of the following would yield butan-1-ol?

In the following reaction, A is an intermediate while B is the product. A and B respectively are:

Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same room temperature and pressure. The ratio of total number of atoms of these gases present in different flasks would be

How many ions per molecule are produced in the solution when Mohr salt is dissolved in excess of water?

How does pressure affect the formation of supersaturated solutions with example?

Amino group is ortho, para directing for aromatic electrophilic substitution. On nitration of aniline with concentrated acids, a good amount of meta nitro aniline is obtained. This is due to

Which of the following is formed when a suspension of powdered colemanite is saturated with SO2 gas.

In the Hofmann bromamide degradation reaction, the number of moles of NaOHand Br2used per mole of amine produced are:

The basic character of hydroxides of alkaline earth metals increase in the order:

Chlorobenzene is

Sodium sulphate is soluble in water but barium sulphate is insoluble because

Suggest reasons why the B–F bond lengths in BF3 (130 pm) and BF−4 (143 pm) differ.

What is the freezing point of a solution containing 8.1 g HBr in 100g water assuming the acid to be 90% ionised (Kf for water =1.86 Kmole-1)

The correct IUPAC name of the given compound is I−C|F=C|Cl−C≡C−OCH3

Two moles of PCl5 were heated to 327oC in a closed two litre vessel and when equilibrium was achieved, PCl5 was found to be 40% dissociated into PCl3 and Cl2. Calculate the equilibrium constant (KC) for the reaction

Metallic tin in the presence of HCl is oxidized by K2Cr2O7 to stannic chloride, SnCl4. What volume of deci-normal dichromate solution would be required by 11.9 g of tin? (Atomic mass of Sn =119 u)

Light of wavelength 12818∘A is emitted when the electron of a hydrogen atom drops from 5th to 3rd orbit. Find the wavelength of the photon emitted when the electron falls from 3rd to 2nd orbit.

The number of possible isomers for the complex [Co(en)2Cl2]Cl will be: (en = ethylenediamine)

Which of the following is correct in terms of increasing work done for the same initial and final state?

The standard heats of formation of NO2 (g) and N2O4 (g) are 8.0 and 2.0 kcal mol−1 respectively, the heat of dimerization of NO2 in kcal is

An ideal gas expands in volume from 10-3m3 to 10-2m-3 at 300K against a constant pressure of 105Nm-2.The work done is?

The solubility product of a sparingly soluble salt A2B is 3.2×10−11. Its solubility in molL−1 is:

A 0.5 dm3 flask contains gas A and a 1 dm3 flask contains gas B at the same temperature. If the density of A=3 g.dm−3, that of B=1.5 g.dm−3 and the molar mass of A=12 B, the ratio of pressures exerted by the gases is:

Liquids A and B form an ideal solution in the entire composition range. AT 350 K, the vapour pressures of pure A and pure B are 7×103 Pa and 12×103 Pa, respectively. The composition of the vapour, in equilibrium with a solution containing 40 mole percent of A at this temperature is:

Given: N2(g)+3H2(g)⇌2NH3(g);K1 N2(g)+O2(g)⇌2NO(g);K2 H2(g)+12O2(g)⇌H2O(g);K3 The equilibrium constant for 2NH3(g)+52O2(g)⇌2NO(g)+3H2O(g) will be:

Why no of carbon is doubled during the wurtz reaction

Difference between aldehydes and carboxylic acids?

If orbital is defined as a region of an atom where electron may be found ,it will have physical significance. And if orbital is Defined as an equation (wave function)then it will not have physical significance .is this right?

Which of the following compounds is asymmetric?

Q47. The polymetallic nodules contain: 1. Iron 2. Mangnese 3. Rare Earth Metals Which of the above statement(s) is/are correct?

The potential of a Standard Hydrogen Electrode is