46295 + Interview Questions in Chemistry

1.	An element (atomic mass 100g/mol) havingbcc structure has unit cell edge 400pm. Then density of the element is [CBSE PMT 1996; AIIMS 2002]
Answer» An element (atomic mass 100g/mol) havingbcc structure has unit cell edge 400pm. Then density of the element is [CBSE PMT 1996; AIIMS 2002]

Discussion

2.	The calculated spin magnetic moment of Fe(II) is
Answer» The calculated spin magnetic moment of Fe(II) is

Discussion

3.	The de-Broglie wavelength associated with a material particle is
Answer» The de-Broglie wavelength associated with a material particle is

3.

The de-Broglie wavelength associated with a material particle is

Answer»

The de-Broglie wavelength associated with a material particle is

Discussion

4.	The boiling point of an aqueous solution of a non-volatile solute is 100.15 ∘C. What is the freezing point of an aqueous solution obtained by diluting the above solution with an equal volume of water? The value of Kb and Kf for water are 0.512 ∘ C kg/mol and 1.86 ∘ C kg/mol respectively.
Answer» The boiling point of an aqueous solution of a non-volatile solute is $100.15^{\circ} C$ . What is the freezing point of an aqueous solution obtained by diluting the above solution with an equal volume of water? The value of $K_{b}$ and $K_{f}$ for water are $0.512^{\circ} C kg/mol$ and $1.86^{\circ} C kg/mol$ respectively.

Discussion

5.	Which can have both +ve and –ve oxidation states in their compounds:
Answer» Which can have both +ve and –ve oxidation states in their compounds:

Discussion

6.	Q. The mole percent of oxygen gas present in gaseous mixture containing 14.0 gm of nitrogen and 32.0 gm of oxygen is:(a) 50. (b) 33.3. (c)66.6. (d) 40.
Answer» Q. The mole percent of oxygen gas present in gaseous mixture containing 14.0 gm of nitrogen and 32.0 gm of oxygen is: (a) 50. (b) 33.3. (c)66.6. (d) 40.

Discussion

7.	Which of the following can be termed as oxyfluorides of Xenon?
Answer» Which of the following can be termed as oxyfluorides of Xenon?

Discussion

8.	Two oxides of certian metal were separetly heated in a current of hydrogen untill constant weights were obtained . The.water produces in each case was carefully collected and weighed . 2 grams of each oxide gave respectively 0.2517 grams and 0.4526 grams of water .show that these results establosh the law of multiple proportions.
Answer» Two oxides of certian metal were separetly heated in a current of hydrogen untill constant weights were obtained . The.water produces in each case was carefully collected and weighed . 2 grams of each oxide gave respectively 0.2517 grams and 0.4526 grams of water .show that these results establosh the law of multiple proportions.

Discussion

9.	Discuss the effect of pressure and temperature on the adsorption of gases on solids.
Answer» Discuss the effect of pressure and temperature on the adsorption of gases on solids.

Discussion

10.	Given that ΔH = 0 for mixing of two gases. Explain whether the diffusion of these gases into each other in a dosed container is a spontaneous process or not?
Answer» Given that $Δ H$ = 0 for mixing of two gases. Explain whether the diffusion of these gases into each other in a dosed container is a spontaneous process or not?

Discussion

11.	Which of the following dimers is planar?
Answer» Which of the following dimers is planar?

Discussion

12.	When phenol is treated with bromine water, white precipitate is obtained. Give the structure and the name of the compound formed.
Answer» When phenol is treated with bromine water, white precipitate is obtained. Give the structure and the name of the compound formed.

Discussion

13.	QUESTION 14.17 What are enzymes?
Answer» QUESTION 14.17 What are enzymes?

13.

QUESTION 14.17 What are enzymes?

Answer»

QUESTION 14.17

What are enzymes?

Discussion

14.	Why do soaps not work with hard water ?
Answer» Why do soaps not work with hard water ?

Discussion

15.	For the reaction NH4HS(g)⇌NH3(g)+H2S(g) in a closed flask, the equilibrium pressure is P atm. The standard free energy of the reaction would be :
Answer» For the reaction $N H_{4} H S_{(g)} ⇌ N H_{3 (g)} + H_{2} S_{(g)}$ in a closed flask, the equilibrium pressure is P atm. The standard free energy of the reaction would be :

Discussion

16.	An aqueous solution contains 10% ammonia by mass and has a density 0.99 g cm-3. If Ka for NH4+ is 5.0×10-10 M, the value of hydroxyl ion concentration will be
Answer» An aqueous solution contains 10% ammonia by mass and has a density 0.99 g cm-3. If Ka for NH₄⁺is 5.0×10-10 M, the value of hydroxyl ion concentration will be

Discussion

17.	Match List-I with List-II and select the correct answer using the codes given below the lists
Answer» Match List-I with List-II and select the correct answer using the codes given below the lists

17.

Match List-I with List-II and select the correct answer using the codes given below the lists

Answer»

Match List-I with List-II and select the correct answer using the codes given below the lists

Discussion

18.	For an electron in the nth Bohr orbit of hydrogen atom, what will be the ratio of radius of orbit to its de-Broglie wavelength.
Answer» For an electron in the $n^{t h}$ Bohr orbit of hydrogen atom, what will be the ratio of radius of orbit to its de-Broglie wavelength.

Discussion

19.	Isotone of 7632Ge is/are:
Answer» Isotone of $_{32}^{76} G e$ is/are:

Discussion

20.	A vertical U-tube with two limbs 0.75 m apart is filled with water and rotated about a vertical axis 0.5 m from the left limb, as shown in the figure. If the speed of rotation is 60 rpm, difference in elevation of water levels in the two limbs is: (Upto 2 decimal digit)
Answer» A vertical $U$ -tube with two limbs 0.75 m apart is filled with water and rotated about a vertical axis 0.5 m from the left limb, as shown in the figure. If the speed of rotation is 60 rpm, difference in elevation of water levels in the two limbs is: (Upto 2 decimal digit)

Discussion

21.	In the figure below, the velocities of different blocks are as shown: Find the velocity of C?
Answer» In the figure below, the velocities of different blocks are as shown: Find the velocity of C?

21.

In the figure below, the velocities of different blocks are as shown: Find the velocity of C?

Answer»

In the figure below, the velocities of different blocks are as shown:

Find the velocity of C?

Discussion

22.	Read the following and select one the correct answer: Statement I: LiCl is predominantly a covalent compound Statement II: Electronegativity difference between Li and Cl is too small
Answer» Read the following and select one the correct answer: Statement I: $L i C l$ is predominantly a covalent compound Statement II: Electronegativity difference between Li and Cl is too small

22.

Read the following and select one the correct answer: Statement I: LiCl is predominantly a covalent compound Statement II: Electronegativity difference between Li and Cl is too small

Answer»

Read the following and select one the correct answer:

Statement I: $L i C l$ is predominantly a covalent compound
Statement II: Electronegativity difference between Li and Cl is too small

Discussion

23.	The basic strength of the ions I, II and III decrease in the order
Answer» The basic strength of the ions I, II and III decrease in the order

23.

The basic strength of the ions I, II and III decrease in the order

Answer»

The basic strength of the ions I, II and III decrease in the order

Discussion

24.	The ionization constant of a weak acid is 1.6×10−5 and the molar conductivity at infinite dilution is 400×10−4 Sm2mol−1. If the cell constant is 0.01 m−1 then conductance of 0.01 M acid solution is (in S):
Answer» The ionization constant of a weak acid is $1.6 \times 10^{- 5}$ and the molar conductivity at infinite dilution is $400 \times 10^{- 4} S m^{2} m o l^{- 1}$ . If the cell constant is $0.01 m^{- 1}$ then conductance of 0.01 M acid solution is (in S):

Discussion

25.	Which of the following molecules are planar and have an angular geometry?
Answer» Which of the following molecules are planar and have an angular geometry?

Discussion

26.	Find the wavelength of the first line of spectral series of He+ ion whose interval between extreme lines is 1λ1−1λ2=27419.25 cm−1 (Take Rydberg's constant R=109677 cm−1,1109677=9.11×10−6 cm)
Answer» Find the wavelength of the first line of spectral series of $H e^{+}$ ion whose interval between extreme lines is $\frac{1}{λ_{1}} - \frac{1}{λ_{2}} = 27419.25 {cm}^{- 1}$ (Take Rydberg's constant $R = 109677 {cm}^{- 1}, \frac{1}{109677} = 9.11 \times 10^{- 6} c m$ )

Discussion

27.	Solubility of CaCl2 is 4×10−8, then what would be its new solubility in the presence of 10−2M Ca(OH)2?
Answer» Solubility of $C a C l_{2}$ is $4 \times 10^{- 8}$ , then what would be its new solubility in the presence of $10^{- 2} M$ $C a (O H)_{2}$ ?

Discussion

28.	The dipole moment of which ketone is maximum?
Answer» The dipole moment of which ketone is maximum?

Discussion

29.	Pure water freezes at 273 K and 1 bar. The addition of 34.5 g of ethanol to 500 g of water changes the freezing point of the solution. Use the freezing point depression constant of water as 2 K kg mol−1. The figures shown below represent plots of vapour pressure (V.P.) versus temperature (T). (Molecular weight of ethanol is 46 g mol−1). Among the following, the option representing change in the freezing point is:
Answer» Pure water freezes at $273 K$ and $1 bar$ . The addition of $34.5 g$ of ethanol to $500 g$ of water changes the freezing point of the solution. Use the freezing point depression constant of water as $2 {K kg mol}^{- 1}$ . The figures shown below represent plots of vapour pressure (V.P.) versus temperature $(T)$ . (Molecular weight of ethanol is $46 {g mol}^{- 1}$ ). Among the following, the option representing change in the freezing point is:

Discussion

30.	1)give IUPAC name of (CH33)2=C(Br)CH2OH
Answer» 1)give IUPAC name of (CH3₃₎₂=C(Br)CH₂OH

Discussion

31.	Question 01 Which of the following units is useful in relating concentration of solution with its vapour pressure? (a) Mole fraction (b) Parts per million (c) Mass percentage (d) Molality
Answer» Question 01 Which of the following units is useful in relating concentration of solution with its vapour pressure? (a) Mole fraction (b) Parts per million (c) Mass percentage (d) Molality

Discussion

32.	Consider the reaction: 4NO2(g) + O2(g) → 2N2O5(g), ΔrH = −111kJ. If N2O5(s) is formed instead of N2O5(g) in the above reaction, the ΔrH value will be: (given, ΔH of sublimation for N2O5 is 54 kJ mol−1)
Answer» Consider the reaction: $4 N O_{2} (g) + O_{2} (g) \to 2 N_{2} O_{5} (g), Δ_{r} H = - 111 k J$ . If $N_{2} O_{5} (s)$ is formed instead of $N_{2} O_{5} (g)$ in the above reaction, the $Δ_{r} H$ value will be: (given, $Δ H$ of sublimation for $N_{2} O_{5}$ is $54 k J m o l^{- 1}$ )

32.

Consider the reaction: 4NO2(g) + O2(g) → 2N2O5(g), ΔrH = −111kJ. If N2O5(s) is formed instead of N2O5(g) in the above reaction, the ΔrH value will be: (given, ΔH of sublimation for N2O5 is 54 kJ mol−1)

Answer»

Consider the reaction:

$4 N O_{2} (g) + O_{2} (g) \to 2 N_{2} O_{5} (g), Δ_{r} H = - 111 k J$ . If $N_{2} O_{5} (s)$ is formed instead of $N_{2} O_{5} (g)$ in the above reaction, the $Δ_{r} H$ value will be:

(given, $Δ H$ of sublimation for $N_{2} O_{5}$ is $54 k J m o l^{- 1}$ )

Discussion

33.	How many times 1M CH3COOH solution should be diluted so that pH of the solution is doubled? (Ka of CH3COOH=1.8×10−5)
Answer» How many times 1M $C H_{3} C O O H$ solution should be diluted so that pH of the solution is doubled? $(K_{a} o f C H_{3} C O O H = 1.8 \times 10^{- 5})$

Discussion

34.	How many moles of oxygen atoms is present in 80% pure 20g of CO2?
Answer» How many moles of oxygen atoms is present in $80 %$ pure 20g of $C O_{2}$ ?

Discussion

35.	how to find molarity of pure water
Answer» how to find molarity of pure water

Discussion

36.	Which of the following oxides have acidic properties?
Answer» Which of the following oxides have acidic properties?

Discussion

37.	Arrange the following in increasing order of +I effect : 1∘Alkyl Group, 2∘Alkyl Group, 3∘Alkyl Groupand Methyl Group
Answer» Arrange the following in increasing order of $+ I$ effect : $1^{\circ} Alkyl Group, 2^{\circ} Alkyl Group, 3^{\circ} Alkyl Group and Methyl Group$

Discussion

38.	Which of the following ligands form a chelate
Answer» Which of the following ligands form a chelate

Discussion

39.	Which of the following complex compounds will not exhibit geometrical isomerism?
Answer» Which of the following complex compounds will not exhibit geometrical isomerism?

Discussion

40.	What does dilute gas of bosons mean? What is the quantum state? Can the temperature go below 0?
Answer» What does dilute gas of bosons mean? What is the quantum state? Can the temperature go below 0?

Discussion

41.	Br2Δ⟶hν? Identify the product(s).
Answer» $B r_{2} Δ ⟶ h ν ?$ Identify the product(s).

Discussion

42.	The number of electrons, protons and neutrons in a species is equal to 10, 8 and 8 respectively. Assign the proper symbol to the species.
Answer» The number of electrons, protons and neutrons in a species is equal to 10, 8 and 8 respectively. Assign the proper symbol to the species.

Discussion

43.	H3PO4+H2O⇌H3O++H2PO−4; pK1=2.15 H2PO−4+H2O⇌H3O++HPO−24; pK2=7.20 Hence, pH of 0.01 M NaH2PO4 is:
Answer» $H_{3} P O_{4} + H_{2} O ⇌ H_{3} O^{+} + H_{2} P O_{4}^{-}; p K_{1} = 2.15$ $H_{2} P O_{4}^{-} + H_{2} O ⇌ H_{3} O^{+} + H P O_{4}^{- 2}; p K_{2} = 7.20$ $H e n c e, p H o f 0.01 M N a H_{2} P O_{4} i s$ :

Discussion

44.	In acidic medium in the presence of conc. H2SO4 acetaldehyde will give
Answer» In acidic medium in the presence of conc. $H_{2} S O_{4}$ acetaldehyde will give

Discussion

45.	Increase in enthalpy of the surroundings is equal to decrease in enthalpy of the system. Will the temperature of system and surroundings be the same when they are in thermal equilibrium?
Answer» Increase in enthalpy of the surroundings is equal to decrease in enthalpy of the system. Will the temperature of system and surroundings be the same when they are in thermal equilibrium?

Discussion

46.	What is the distinguishing layer between hexagonal close packing and cubic close packing?
Answer» What is the distinguishing layer between hexagonal close packing and cubic close packing?

Discussion

47.	For IUPAC nomenclature of elements with atomic number greater than 100, the abbreviation used for digit zero is:
Answer» For IUPAC nomenclature of elements with atomic number greater than 100, the abbreviation used for digit zero is:

Discussion

48.	The group that exhibits +R effect when attached to benzene ring is
Answer» The group that exhibits +R effect when attached to benzene ring is

Discussion

49.	Amylose is a polymer of
Answer» Amylose is a polymer of

Discussion

50.	Which of the following process is not responsible for the presence of electric charge on the sol particles?
Answer» Which of the following process is not responsible for the presence of electric charge on the sol particles?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

An element (atomic mass 100g/mol) havingbcc structure has unit cell edge 400pm. Then density of the element is [CBSE PMT 1996; AIIMS 2002]

The calculated spin magnetic moment of Fe(II) is

The de-Broglie wavelength associated with a material particle is

The boiling point of an aqueous solution of a non-volatile solute is 100.15 ∘C. What is the freezing point of an aqueous solution obtained by diluting the above solution with an equal volume of water? The value of Kb and Kf for water are 0.512 ∘ C kg/mol and 1.86 ∘ C kg/mol respectively.

Which can have both +ve and –ve oxidation states in their compounds:

Q. The mole percent of oxygen gas present in gaseous mixture containing 14.0 gm of nitrogen and 32.0 gm of oxygen is:(a) 50. (b) 33.3. (c)66.6. (d) 40.

Which of the following can be termed as oxyfluorides of Xenon?

Discuss the effect of pressure and temperature on the adsorption of gases on solids.

Given that ΔH = 0 for mixing of two gases. Explain whether the diffusion of these gases into each other in a dosed container is a spontaneous process or not?

Which of the following dimers is planar?

When phenol is treated with bromine water, white precipitate is obtained. Give the structure and the name of the compound formed.

QUESTION 14.17 What are enzymes?

Why do soaps not work with hard water ?

For the reaction NH4HS(g)⇌NH3(g)+H2S(g) in a closed flask, the equilibrium pressure is P atm. The standard free energy of the reaction would be :

An aqueous solution contains 10% ammonia by mass and has a density 0.99 g cm-3. If Ka for NH4+ is 5.0×10-10 M, the value of hydroxyl ion concentration will be

Match List-I with List-II and select the correct answer using the codes given below the lists ​

For an electron in the nth Bohr orbit of hydrogen atom, what will be the ratio of radius of orbit to its de-Broglie wavelength.

Isotone of 7632Ge is/are:

A vertical U-tube with two limbs 0.75 m apart is filled with water and rotated about a vertical axis 0.5 m from the left limb, as shown in the figure. If the speed of rotation is 60 rpm, difference in elevation of water levels in the two limbs is: (Upto 2 decimal digit)

In the figure below, the velocities of different blocks are as shown: Find the velocity of C?

Read the following and select one the correct answer: Statement I: LiCl is predominantly a covalent compound Statement II: Electronegativity difference between Li and Cl is too small

The basic strength of the ions I, II and III decrease in the order

The ionization constant of a weak acid is 1.6×10−5 and the molar conductivity at infinite dilution is 400×10−4 Sm2mol−1. If the cell constant is 0.01 m−1 then conductance of 0.01 M acid solution is (in S):

Which of the following molecules are planar and have an angular geometry?

Find the wavelength of the first line of spectral series of He+ ion whose interval between extreme lines is 1λ1−1λ2=27419.25 cm−1 (Take Rydberg's constant R=109677 cm−1,1109677=9.11×10−6 cm)

Solubility of CaCl2 is 4×10−8, then what would be its new solubility in the presence of 10−2M Ca(OH)2?

The dipole moment of which ketone is maximum?

1)give IUPAC name of (CH33)2=C(Br)CH2OH

Question 01 Which of the following units is useful in relating concentration of solution with its vapour pressure? (a) Mole fraction (b) Parts per million (c) Mass percentage (d) Molality

Consider the reaction: 4NO2(g) + O2(g) → 2N2O5(g), ΔrH = −111kJ. If N2O5(s) is formed instead of N2O5(g) in the above reaction, the ΔrH value will be: (given, ΔH of sublimation for N2O5 is 54 kJ mol−1)

How many times 1M CH3COOH solution should be diluted so that pH of the solution is doubled? (Ka of CH3COOH=1.8×10−5)

How many moles of oxygen atoms is present in 80% pure 20g of CO2?

how to find molarity of pure water

Which of the following oxides have acidic properties?

Arrange the following in increasing order of +I effect : 1∘Alkyl Group, 2∘Alkyl Group, 3∘Alkyl Groupand Methyl Group

Which of the following ligands form a chelate

Which of the following complex compounds will not exhibit geometrical isomerism?

What does dilute gas of bosons mean? What is the quantum state? Can the temperature go below 0?

Br2Δ⟶hν? Identify the product(s).

The number of electrons, protons and neutrons in a species is equal to 10, 8 and 8 respectively. Assign the proper symbol to the species.

H3PO4+H2O⇌H3O++H2PO−4; pK1=2.15 H2PO−4+H2O⇌H3O++HPO−24; pK2=7.20 Hence, pH of 0.01 M NaH2PO4 is:

In acidic medium in the presence of conc. H2SO4 acetaldehyde will give

Increase in enthalpy of the surroundings is equal to decrease in enthalpy of the system. Will the temperature of system and surroundings be the same when they are in thermal equilibrium?

What is the distinguishing layer between hexagonal close packing and cubic close packing?

For IUPAC nomenclature of elements with atomic number greater than 100, the abbreviation used for digit zero is:

The group that exhibits +R effect when attached to benzene ring is

Amylose is a polymer of

Which of the following process is not responsible for the presence of electric charge on the sol particles?

Match List-I with List-II and select the correct answer using the codes given below the lists