2600 + Interview Questions in Chemistry Page 15 InterviewSolution

701.	A unknown gas 'A' decolourises bromine in CCl4 and forms a precipitate with ammoniacal silver nitrate. The gas 'A' is:
Answer» A unknown gas 'A' decolourises bromine in $C C l_{4}$ and forms a precipitate with ammoniacal silver nitrate. The gas 'A' is:

Discussion

702.	Calculate the molar concentration of a solution of acetic acid (HOAc) that has a pH of 4.00 (Ka=1.8×10−5)
Answer» Calculate the molar concentration of a solution of acetic acid (HOAc) that has a pH of $4.00 (K_{a} = 1.8 \times 10^{- 5})$

Discussion

703.	The amount of energy released when 1012 atoms of Cl (vapour) are converted to Cl− ions, according to the equation:Cl(g)+e−→Cl−(g) is 58×10−10 JCalculate the ΔegH− of Cl atom in eV atom−1.
Answer» The amount of energy released when $10^{12}$ atoms of $C l$ (vapour) are converted to $C l^{-}$ ions, according to the equation: $C l_{(g)} + e^{-} \to C l_{(g)}^{-} is 58 \times 10^{- 10} J$ Calculate the $Δ_{e g} H^{-}$ of $C l$ atom in ${eV atom}^{- 1}$ .

Discussion

704.	The critical temperature of a gas is that temperature:
Answer» The critical temperature of a gas is that temperature:

Discussion

705.	The percentage by volume of C3H8 in a mixture of C3H8, CH4 and CO is 36.5. Calculate the volume of CO2 produced when 100 mL of mixture is burnt in excess of O2.
Answer» The percentage by volume of $C_{3} H_{8}$ in a mixture of $C_{3} H_{8}$ , $C H_{4}$ and CO is 36.5. Calculate the volume of $C O_{2}$ produced when 100 mL of mixture is burnt in excess of $O_{2}$ .

Discussion

706.	B+H2O→A+C. A & C are as follows.
Answer» $B + H_{2} O \to A + C . A & C$ are as follows.

Discussion

707.	Which of the following pair will not produce dihydrogen gas?
Answer» Which of the following pair will not produce dihydrogen gas?

Discussion

708.	Calculate the sum of lone pairs of electrons in the central atoms of the molecules XeOF4,[XeO6]4− and ClF3.
Answer» Calculate the sum of lone pairs of electrons in the central atoms of the molecules $X e O F_{4}, [X e O_{6}]^{4 -}$ and $C l F_{3}$ .

Discussion

709.	X ml of H2 gas effuse through a pin hole in a container in 5s, the time taken for the effusion of the same volume of the gas specified below uner identical conditions is ?
Answer» X ml of $H_{2}$ gas effuse through a pin hole in a container in 5s, the time taken for the effusion of the same volume of the gas specified below uner identical conditions is ?

Discussion

710.	Sodium and oxygen combine to form two compounds, one being Na2O. The amount of sodium in the other compound is 59% by weight. Find the formula of this compound.
Answer» Sodium and oxygen combine to form two compounds, one being $N a_{2} O$ . The amount of sodium in the other compound is 59% by weight. Find the formula of this compound.

Discussion

711.	Find the amount of oxygen required for the complete combustion of 4 mol of butane.2C4H10+13O2→8CO2+10H2O
Answer» Find the amount of oxygen required for the complete combustion of 4 mol of butane. $2 C_{4} H_{10} + 13 O_{2} \to 8 C O_{2} + 10 H_{2} O$

Discussion

712.	The equilibrium constant for the reaction Br2(l)+Cl2(g)⇌2BrCl(g) at 27∘C is Kp=1 atm. In a closed container of volume 164 L initially 10 moles of Cl2 are present at 27∘C. What minimum moles of Br2(l) must be introduced into this container so that the above equilibrium is maintained at a total pressure of 2.25 atm? Vapour pressure of Br2(l) at 27∘C is 0.25 atm. Assume that volume occupied by the liquid is negligible.[R=0.082 Latmmol−1K−1 ,Atomic mass of bromine = 80]
Answer» The equilibrium constant for the reaction $B r_{2} (l) + C l_{2} (g) ⇌ 2 B r C l (g)$ at $27^{\circ}$ C is $K_{p} = 1 atm$ . In a closed container of volume $164 L$ initially 10 moles of $C l_{2}$ are present at $27^{\circ} C$ . What minimum moles of $B r_{2} (l)$ must be introduced into this container so that the above equilibrium is maintained at a total pressure of 2.25 atm? Vapour pressure of $B r_{2} (l)$ at $27^{\circ}$ C is 0.25 atm. Assume that volume occupied by the liquid is negligible. [ $R = 0.082 {Latmmol}^{- 1} K^{- 1}$ ,Atomic mass of bromine = 80]

Discussion

713.	Which of the following compound is not aromatic?
Answer» Which of the following compound is not aromatic?

Discussion

714.	Which of the following molecules has the largest bond angle?
Answer» Which of the following molecules has the largest bond angle?

Discussion

715.	A spherical balloon of 21 cm diameter is to be filled up with H2 at NTP from a cylinder containing the gas having a pressure of 20 atm at 27∘C. The cylinder can hold 2.82 litre of water. The number of balloons that can be filled up is:
Answer» A spherical balloon of $21 cm$ diameter is to be filled up with $H_{2}$ at NTP from a cylinder containing the gas having a pressure of $20$ atm at $27^{\circ}$ C. The cylinder can hold $2.82$ litre of water. The number of balloons that can be filled up is:

Discussion

716.	The name of the following compound is
Answer» The name of the following compound is

716.

The name of the following compound is

Answer»

The name of the following compound is

Discussion

717.	Among group 15 elements, the one having a negative electron affinity is:
Answer» Among group 15 elements, the one having a negative electron affinity is:

Discussion

718.	Statement - I: 1st ionization energy of ''P'' is greater than ''S''Statement - II: Zeff value of ''S'' is greater than ''P''
Answer» Statement - I: 1st ionization energy of ''P'' is greater than ''S'' Statement - II: $Z_{e f f}$ value of ''S'' is greater than ''P''

Discussion

719.	Potassium ferrocyanide is used for the detection of
Answer» Potassium ferrocyanide is used for the detection of

Discussion

720.	In which of the following transition will the wavelength be minimum:
Answer» In which of the following transition will the wavelength be minimum:

Discussion

721.	Identify the correct order of boiling points of the following compounds:1. CH3CH2CH2CH2OH2. CH3CH2CH2CHO3. CH3CH2CH2COOH
Answer» Identify the correct order of boiling points of the following compounds: 1. $C H_{3} C H_{2} C H_{2} C H_{2} O H$ 2. $C H_{3} C H_{2} C H_{2} C H O$ 3. $C H_{3} C H_{2} C H_{2} C O O H$

Discussion

722.	The acid 'D' obtained through the followingsequence of reactions is
Answer» The acid 'D' obtained through the following sequence of reactions is

722.

The acid 'D' obtained through the followingsequence of reactions is

Answer»

The acid 'D' obtained through the following
sequence of reactions is

Discussion

723.	Enthalpy of fusion of a liquid is 1.435 kcal mol−1 and molar entropy change is 5.26 cal mol−1K−1, hence melting point of liquid is
Answer» Enthalpy of fusion of a liquid is $1.435 k c a l m o l^{- 1}$ and molar entropy change is $5.26 c a l m o l^{- 1} K^{- 1}$ , hence melting point of liquid is

Discussion

724.	Salts that are least likely to be found in minerals are:
Answer» Salts that are least likely to be found in minerals are:

Discussion

725.	The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approxiamately: (plancks's constant, h=6.63×10−34Js)
Answer» The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of $10 m / s$ is approxiamately: $(plancks's constant, h = 6.63 \times 10^{- 34} J s)$

Discussion

726.	How many sub-shells are possible for n = 4?
Answer» How many sub-shells are possible for n = 4?

Discussion

727.	The basic character of ethyl amine, diethyl amine and triethyl amine in chlorobenzene is
Answer» The basic character of ethyl amine, diethyl amine and triethyl amine in chlorobenzene is

Discussion

728.	In the following reaction, X is neo-pentyl alcohol + H2SO4→x
Answer» In the following reaction, X is neo-pentyl alcohol + ^H₂^SO₄→x

728.

In the following reaction, X is neo-pentyl alcohol + H2SO4→x

Answer»

In the following reaction, X is

neo-pentyl alcohol + ^H₂^SO₄→x

Discussion

729.	Which of the following compounds will show geometrical isomerism?
Answer» Which of the following compounds will show geometrical isomerism?

Discussion

730.	Number of - OH groups present in the cyclic structure of 'deoxy ribose' sugar
Answer» Number of - OH groups present in the cyclic structure of 'deoxy ribose' sugar

Discussion

731.	Read the assertion and reason carefully to mark the correct option out of the options given below :(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.(e) If assertion is false but reason is true.Assertion: Acetic acid does not undergo haloform reaction.Reason: Acetic acid has no alpha hydrogens.
Answer» Read the assertion and reason carefully to mark the correct option out of the options given below : (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion. (c) If assertion is true but reason is false. (d) If the assertion and reason both are false. (e) If assertion is false but reason is true. Assertion: Acetic acid does not undergo haloform reaction. Reason: Acetic acid has no alpha hydrogens.

731.

Read the assertion and reason carefully to mark the correct option out of the options given below :(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.(e) If assertion is false but reason is true.Assertion: Acetic acid does not undergo haloform reaction.Reason: Acetic acid has no alpha hydrogens.

Answer»

Read the assertion and reason carefully to mark the correct option out of the options given below :

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

(e) If assertion is false but reason is true.

Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.

Discussion

732.	The pre-expontial factor in the Arrhenius equation of a first order reaction has the units -
Answer» The pre-expontial factor in the Arrhenius equation of a first order reaction has the units -

Discussion

733.	Tincture of iodine is:
Answer» Tincture of iodine is:

Discussion

734.	To synthesize the unsymmetrical alkyne the reagents needed would be
Answer» To synthesize the unsymmetrical alkyne the reagents needed would be

734.

To synthesize the unsymmetrical alkyne the reagents needed would be

Answer»

To synthesize the unsymmetrical alkyne

the reagents needed would be

Discussion

735.	The correct order of Catenation property is:
Answer» The correct order of Catenation property is:

Discussion

736.	1 mole of an ideal gas A(Cv,m=3R) and 2 mole of an ideal gas B are (CV,m=32R) taken in a container and expanded reversible and adiabatically from 1 litre to 4l itre starting from initial temperature of 320 K. ΔE or ΔU for the process is:
Answer» $1 m o l e$ of an ideal gas $A (C_{v, m} = 3 R)$ and $2 m o l e$ of an ideal gas $B$ are $(C_{V, m} = \frac{3}{2} R)$ taken in a container and expanded reversible and adiabatically from $1 l i t r e t o 4 l i t r e$ starting from initial temperature of $320 K$ . $Δ E$ or $Δ U$ for the process is:

Discussion

737.	What is the relative atomic mass and atomic mass of calcium?
Answer» What is the relative atomic mass and atomic mass of calcium?

Discussion

738.	The compound that is most difficult to protonate is:
Answer» The compound that is most difficult to protonate is:

Discussion

739.	In the Victor Meyer’s test, the colours given by 1 ° 2 ° and 3 ° alcohols are respectively:
Answer» In the Victor Meyer’s test, the colours given by 1 ° 2 ° and 3 ° alcohols are respectively:

Discussion

740.	Which of the following pairs is not the correct order of lattice energy?
Answer» Which of the following pairs is not the correct order of lattice energy?

Discussion

741.	The product in the following reaction is
Answer» The product in the following reaction is

Discussion

742.	The equilibrium constant kc of the reaction A2 (g) + B2 (g) ⇌ 2AB (g) is 50. If 1 mol of A2 and 2 mol of B2 are mixed, the amount of AB at equilibrium would be:
Answer» The equilibrium constant $k_{c}$ of the reaction $A_{2}$ (g) + $B_{2}$ (g) $⇌$ 2AB (g) is 50. If 1 mol of $A_{2}$ and 2 mol of $B_{2}$ are mixed, the amount of AB at equilibrium would be:

Discussion

743.	The valence shell electronic configuration of Cr2+ ion is
Answer» The valence shell electronic configuration of $C r^{2 +}$ ion is

Discussion

744.	A hydrogen atom has an orbit which has a diameter of about 16.92 Ao. What is the maximum number of electrons that can be accommodated in that orbit?
Answer» A hydrogen atom has an orbit which has a diameter of about $16.92 A^{o}$ . What is the maximum number of electrons that can be accommodated in that orbit?

Discussion

745.	Which of the following is the strongest acid ?
Answer» Which of the following is the strongest acid ?

Discussion

746.	The arrangement of X− ions around A+ ion in solid AX is given in the figure (not drawn to scale). If the radius of X− is 250 pm, the ideal radius of A+ is
Answer» The arrangement of $X^{-}$ ions around $A^{+}$ ion in solid AX is given in the figure (not drawn to scale). If the radius of $X^{-}$ is 250 pm, the ideal radius of $A^{+}$ is

Discussion

747.	1L of a mixture of CO and CO2 becomes 1.6L when passed through a red hot charcoal, CO2 in the mixture
Answer» 1L of a mixture of CO and $C O_{2}$ becomes 1.6L when passed through a red hot charcoal, $C O_{2}$ in the mixture

Discussion

748.	Major product for the above reaction is :
Answer» Major product for the above reaction is :

Discussion

749.	Which of the following compound does not undergo diazotization reaction?
Answer» Which of the following compound does not undergo diazotization reaction?

Discussion

750.	Which of the following molecule has highest electron density in the phenyl ring?
Answer» Which of the following molecule has highest electron density in the phenyl ring?

Discussion

Explore topic-wise InterviewSolutions in .

A unknown gas 'A' decolourises bromine in CCl4 and forms a precipitate with ammoniacal silver nitrate. The gas 'A' is:

Calculate the molar concentration of a solution of acetic acid (HOAc) that has a pH of 4.00 (Ka=1.8×10−5)

The amount of energy released when 1012 atoms of Cl (vapour) are converted to Cl− ions, according to the equation:Cl(g)+e−→Cl−(g) is 58×10−10 JCalculate the ΔegH− of Cl atom in eV atom−1.

The critical temperature of a gas is that temperature:

The percentage by volume of C3H8 in a mixture of C3H8, CH4 and CO is 36.5. Calculate the volume of CO2 produced when 100 mL of mixture is burnt in excess of O2.

B+H2O→A+C. A &amp; C are as follows.

Which of the following pair will not produce dihydrogen gas?

Calculate the sum of lone pairs of electrons in the central atoms of the molecules XeOF4,[XeO6]4− and ClF3.

X ml of H2 gas effuse through a pin hole in a container in 5s, the time taken for the effusion of the same volume of the gas specified below uner identical conditions is ?

Sodium and oxygen combine to form two compounds, one being Na2O. The amount of sodium in the other compound is 59% by weight. Find the formula of this compound.

Find the amount of oxygen required for the complete combustion of 4 mol of butane.2C4H10+13O2→8CO2+10H2O

Which of the following compound is not aromatic?

Which of the following molecules has the largest bond angle?

A spherical balloon of 21 cm diameter is to be filled up with H2 at NTP from a cylinder containing the gas having a pressure of 20 atm at 27∘C. The cylinder can hold 2.82 litre of water. The number of balloons that can be filled up is:

The name of the following compound is

Among group 15 elements, the one having a negative electron affinity is:

Statement - I: 1st ionization energy of ''P'' is greater than ''S''Statement - II: Zeff value of ''S'' is greater than ''P''

Potassium ferrocyanide is used for the detection of

In which of the following transition will the wavelength be minimum:

Identify the correct order of boiling points of the following compounds:1. CH3CH2CH2CH2OH2. CH3CH2CH2CHO3. CH3CH2CH2COOH

The acid 'D' obtained through the followingsequence of reactions is

Enthalpy of fusion of a liquid is 1.435 kcal mol−1 and molar entropy change is 5.26 cal mol−1K−1, hence melting point of liquid is

Salts that are least likely to be found in minerals are:

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approxiamately: (plancks's constant, h=6.63×10−34Js)

How many sub-shells are possible for n = 4?

The basic character of ethyl amine, diethyl amine and triethyl amine in chlorobenzene is

In the following reaction, X is neo-pentyl alcohol + H2SO4→x

Which of the following compounds will show geometrical isomerism?

Number of - OH groups present in the cyclic structure of 'deoxy ribose' sugar

The pre-expontial factor in the Arrhenius equation of a first order reaction has the units -

Tincture of iodine is:

To synthesize the unsymmetrical alkyne the reagents needed would be

The correct order of Catenation property is:

1 mole of an ideal gas A(Cv,m=3R) and 2 mole of an ideal gas B are (CV,m=32R) taken in a container and expanded reversible and adiabatically from 1 litre to 4l itre starting from initial temperature of 320 K. ΔE or ΔU for the process is:

What is the relative atomic mass and atomic mass of calcium?

The compound that is most difficult to protonate is:

In the Victor Meyer’s test, the colours given by 1 ° 2 ° and 3 ° alcohols are respectively:

Which of the following pairs is not the correct order of lattice energy?

The product in the following reaction is

The equilibrium constant kc of the reaction A2 (g) + B2 (g) ⇌ 2AB (g) is 50. If 1 mol of A2 and 2 mol of B2 are mixed, the amount of AB at equilibrium would be:

The valence shell electronic configuration of Cr2+ ion is

A hydrogen atom has an orbit which has a diameter of about 16.92 Ao. What is the maximum number of electrons that can be accommodated in that orbit?

Which of the following is the strongest acid ?

The arrangement of X− ions around A+ ion in solid AX is given in the figure (not drawn to scale). If the radius of X− is 250 pm, the ideal radius of A+ is

1L of a mixture of CO and CO2 becomes 1.6L when passed through a red hot charcoal, CO2 in the mixture

Major product for the above reaction is :

Which of the following compound does not undergo diazotization reaction?

Which of the following molecule has highest electron density in the phenyl ring?

B+H2O→A+C. A & C are as follows.