1708 + Interview Questions in Chemistry

1.	Liquification of gaseous substances whose critical temperatures are below room temperature requires ____.
Answer» Liquification of gaseous substances whose critical temperatures are below room temperature requires ____.

Discussion

2.	The correct plot for Boyle's law is:-
Answer» The correct plot for Boyle's law is:-

Discussion

3.	Which of the following is the correct decreasing order of boiling points?
Answer» Which of the following is the correct decreasing order of boiling points?

Discussion

4.	Starting with one mole of a compound X, it is found that the reaction is 34, complete in 1 min. What is the rate constant if the reaction follows first order?
Answer» Starting with one mole of a compound X, it is found that the reaction is $\frac{3}{4}$ , complete in 1 min. What is the rate constant if the reaction follows first order?

Discussion

5.	Which one of the following group of atoms or ions is not isoelectronic?
Answer» Which one of the following group of atoms or ions is not isoelectronic?

Discussion

6.	Which of the following are correct about physisorption?1) Decrease in entropy of system2) Decrease in enthalpy3) The value of TdS is positive4) It is reversible in nature
Answer» Which of the following are correct about physisorption? 1) Decrease in entropy of system 2) Decrease in enthalpy 3) The value of TdS is positive 4) It is reversible in nature

6.

Which of the following are correct about physisorption?1) Decrease in entropy of system2) Decrease in enthalpy3) The value of TdS is positive4) It is reversible in nature

Answer»

Which of the following are correct about physisorption?

1) Decrease in entropy of system

2) Decrease in enthalpy

3) The value of TdS is positive

4) It is reversible in nature

Discussion

7.	Calculate packing fraction in the following case to two decimal places. All circles are of equal radius.Multiply the answer by 100 and enter the value.___
Answer» Calculate packing fraction in the following case to two decimal places. All circles are of equal radius. Multiply the answer by 100 and enter the value. ___

7.

Calculate packing fraction in the following case to two decimal places. All circles are of equal radius.Multiply the answer by 100 and enter the value.___

Answer»

Calculate packing fraction in the following case to two decimal places. All circles are of equal radius.

Multiply the answer by 100 and enter the value.

___

Discussion

8.	A photon was absorbed by a hydrogen atom and an electron was promoted to the 5th shell. When the excited electron returned to ground state, a visible photon and another quanta were emitted. Which transition is responsible for the emission of the other quanta?
Answer» A photon was absorbed by a hydrogen atom and an electron was promoted to the $5^{t h}$ shell. When the excited electron returned to ground state, a visible photon and another quanta were emitted. Which transition is responsible for the emission of the other quanta?

Discussion

9.	A compact car gets 20 miles per litre on the highway. Gasoline contains 84.0% carbon by mass and has a density of 0.80 g ml−1. The mass of CO2 produced (in g) during a 50 mile-trip is:6160
Answer» A compact car gets $20$ miles per litre on the highway. Gasoline contains $84.0 %$ carbon by mass and has a density of $0.80 g m l^{- 1}$ . The mass of $C O_{2}$ produced (in $g$ ) during a $50$ mile-trip is: 6160

Discussion

10.	The IUPAC name of ethyl isopropyl ketone is
Answer» The IUPAC name of ethyl isopropyl ketone is

Discussion

11.	For the following reaction, the product can be:
Answer» For the following reaction, the product can be:

Discussion

12.	For bcc lattice, the edge length of the unit cell is 500 pm. The molar volume of the lattice is ?
Answer» For bcc lattice, the edge length of the unit cell is 500 pm. The molar volume of the lattice is ?

Discussion

13.	The I.U.P.A.C. name for [Ni(NH3)4][NiCl4] is:
Answer» The I.U.P.A.C. name for $[N i (N H_{3})_{4}] [N i C l_{4}]$ is:

Discussion

14.	4.4 g of a gas at STP occupies a volume of 2.24 L. The gas can be:
Answer» 4.4 g of a gas at STP occupies a volume of 2.24 L. The gas can be:

Discussion

15.	The correct statement about the compounds A, B and C is
Answer» The correct statement about the compounds A, B and C is

Discussion

16.	Arrange in decreasing order of basicity,H2O, OH−, CH3OH,CH3O−
Answer» Arrange in decreasing order of basicity, $H_{2} O, O H^{-}, C H_{3} O H, C H_{3} O^{-}$

Discussion

17.	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

18.	Lewis-Kossel structure of N2 is
Answer» Lewis-Kossel structure of $N_{2}$ is

Discussion

19.	Which one of the following compounds is an allylic halide?
Answer» Which one of the following compounds is an allylic halide?

Discussion

20.	What particle is produced when Phosphorus-29 decays to silicon-29?
Answer» What particle is produced when Phosphorus-29 decays to silicon-29?

Discussion

21.	Calculate the pH at which an acid indicator (HIn) having KIn=10−5 changes its colour. Given, the HIn concentration is 10−3 M.
Answer» Calculate the $p H$ at which an acid indicator $(H I n)$ having $K_{I n} = 10^{- 5}$ changes its colour. Given, the $H I n$ concentration is $10^{- 3} M$ .

Discussion

22.	If the absorbate is held on asurface by weak Vander Waal's forces,the absorption process is called [Kerala(Med.) 2002]
Answer» If the absorbate is held on a surface by weak Vander Waal's forces, the absorption process is called [Kerala (Med.) 2002]

22.

If the absorbate is held on asurface by weak Vander Waal's forces,the absorption process is called [Kerala(Med.) 2002]

Answer»

If the absorbate is held on a
surface by weak Vander Waal's forces,
the

absorption process is called

[Kerala
(Med.) 2002]

Discussion

23.	The ability of an ion to bring about coagulation of a given colloid dependsupon
Answer» The ability of an ion to bring about coagulation of a given colloid depends upon

23.

The ability of an ion to bring about coagulation of a given colloid dependsupon

Answer»

The ability of an ion to bring about coagulation of a given colloid depends

upon

Discussion

24.	What will happen when D - (+) - glucose is treated with methanolic - HCl followed by Tollens' reagent ?
Answer» What will happen when D - (+) - glucose is treated with methanolic - HCl followed by Tollens' reagent ?

Discussion

25.	Pressure of a mixture of 4 g of O2 and 2 g of H2 confined in a bulb of 1 litre at 0°C is___.
Answer» Pressure of a mixture of 4 g of O₂ and 2 g of H₂ confined in a bulb of 1 litre at 0°C is___.

Discussion

26.	Fedlspars and zeolites are examples of:
Answer» Fedlspars and zeolites are examples of:

Discussion

27.	One of the ways in which monomers are converted to polymeric form is by [DCE 2002]
Answer» One of the ways in which monomers are converted to polymeric form is by [DCE 2002]

Discussion

28.	Total pressure of a mixture of H2 and O2 is 1.0 bar. The mixture is allowed to react to form water, which is completely removed to leave only pure H2 at a pressure of 0.34 bar. Assuming ideal gas behaviour and that all pressure measurements were made under the same temperature and volume conditions, the composition of the original mixture is:
Answer» Total pressure of a mixture of $H_{2}$ and $O_{2}$ is 1.0 bar. The mixture is allowed to react to form water, which is completely removed to leave only pure $H_{2}$ at a pressure of 0.34 bar. Assuming ideal gas behaviour and that all pressure measurements were made under the same temperature and volume conditions, the composition of the original mixture is:

Discussion

29.	N2+3H2→2NH31 mol of N2 and 4 mol of H2 are taken in a 15 L flask at 27∘C. After the complete conversion of N2 into NH3, 5 L of H2O is added. The pressure set up in the flask is:
Answer» $N_{2} + 3 H_{2} \to 2 N H_{3}$ 1 mol of $N_{2}$ and 4 mol of $H_{2}$ are taken in a $15 L$ flask at $27^{\circ} C$ . After the complete conversion of $N_{2}$ into $N H_{3}$ , $5 L$ of $H_{2} O$ is added. The pressure set up in the flask is:

Discussion

30.	In Van der Waals equation of state of the gas law, the constant b is a measure of__.
Answer» In Van der Waals equation of state of the gas law, the constant b is a measure of__.

Discussion

31.	Among the following ions which has highest paramagnetism
Answer» Among the following ions which has highest paramagnetism

Discussion

32.	The formation of which of the following polymers involves hydrolysis reaction?
Answer» The formation of which of the following polymers involves hydrolysis reaction?

Discussion

33.	For a sample of perfect gas when its preesure is changed isothermally from pi to pf, the entropy change is given by
Answer» For a sample of perfect gas when its preesure is changed isothermally from $p_{i} t o p_{f}$ , the entropy change is given by

Discussion

34.	Teflon, polystyrene and neoprene are all ________.
Answer» Teflon, polystyrene and neoprene are all ________.

Discussion

35.	IUPAC name of the compoundH2N−O\|\|C−CH\|CH−CH3\|CH3−C(CH3)3?
Answer» IUPAC name of the compound $H_{2} N - O \| \| C - C H \| C H - C H_{3} \| C H_{3} - C (C H_{3})_{3}$ ?

35.

IUPAC name of the compoundH2N−O||C−CH|CH−CH3|CH3−C(CH3)3?

Answer»

IUPAC name of the compound

$H_{2} N - O | | C - C H | C H - C H_{3} | C H_{3} - C (C H_{3})_{3}$ ?

Discussion

36.	The number of bonding and antibonding electrons respectively in CO molecule is
Answer» The number of bonding and antibonding electrons respectively in CO molecule is

Discussion

37.	The velocity of neutrons in a nuclear reactor is slowed down by using:
Answer» The velocity of neutrons in a nuclear reactor is slowed down by using:

Discussion

38.	Glucose reacts with Tollen’s reagent to give a derivative of:
Answer» Glucose reacts with Tollen’s reagent to give a derivative of:

Discussion

39.	Colloidal solution is prepared by following reaction AgNO3 (excess )+KI→AgI↓+KNO3. The most effective electrolyte in the coagulation of this colloidal solution is:
Answer» Colloidal solution is prepared by following reaction $A g N O_{3} (excess) + K I \to A g I ↓ + K N O_{3} .$ The most effective electrolyte in the coagulation of this colloidal solution is:

Discussion

40.	If the following orbital's are hybridized, then the hybridization will be respectively: (i) One s orbital, two p orbitals (ii) One s orbital, three p orbitals (iii) One s orbital, one p orbital
Answer» If the following orbital's are hybridized, then the hybridization will be respectively: (i) One s orbital, two p orbitals (ii) One s orbital, three p orbitals (iii) One s orbital, one p orbital

40.

If the following orbital's are hybridized, then the hybridization will be respectively: (i) One s orbital, two p orbitals (ii) One s orbital, three p orbitals (iii) One s orbital, one p orbital

Answer»

If the following orbital's are hybridized, then the hybridization will be respectively:

(i) One s orbital, two p orbitals (ii) One s orbital, three p orbitals (iii) One s orbital, one p orbital

Discussion

41.	Which nomenclature is not according to IUPAC system?
Answer» Which nomenclature is not according to IUPAC system?

Discussion

42.	Sort the following according to the decreasing order of magnetic moments.
Answer» Sort the following according to the decreasing order of magnetic moments.

Discussion

43.	A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to 3.8×10−5 torr at 00 C. The number of molecules of the gas remaining in the tube is
Answer» A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to $3.8 \times 10^{- 5}$ torr at $0^{0} C$ . The number of molecules of the gas remaining in the tube is

Discussion

44.	Absorption of energy by an atom of hydrogen in the ground state results in the ejection of electron with de-Broglie wavelength λ=4.7×10−10 m. calculate the velocity of ejected photon.
Answer» Absorption of energy by an atom of hydrogen in the ground state results in the ejection of electron with de-Broglie wavelength $λ = 4.7 \times 10^{- 10}$ m. calculate the velocity of ejected photon.

Discussion

45.	Although there are several ores, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction. Iron is removed from chalcopyrite as:
Answer» Although there are several ores, 80% of the world copper production comes from the ore chalcopyrite ( $C u F e S_{2}$ ). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction. Iron is removed from chalcopyrite as:

Discussion

46.	For the gaseous reaction, pA+qB⇌qC+pD, which of the following relationship is true?
Answer» For the gaseous reaction, $p A + q B ⇌ q C + p D$ , which of the following relationship is true?

Discussion

47.	As per postulates of Werner's theory for coordination compound
Answer» As per postulates of Werner's theory for coordination compound

Discussion

48.	Among Alkaline earth metals, the element predominantly forming covalent compounds is:
Answer» Among Alkaline earth metals, the element predominantly forming covalent compounds is:

Discussion

49.	What is (X) in the following reaction?
Answer» What is (X) in the following reaction?

Discussion

50.	The solubility of CaF2 is 2 × 10−4. Its solubilily product KSP is
Answer» The solubility of $C a F_{2}$ is $2 \times 10^{- 4}$ . Its solubilily product $K_{S P}$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Liquification of gaseous substances whose critical temperatures are below room temperature requires ____.

The correct plot for Boyle's law is:-

Which of the following is the correct decreasing order of boiling points?

Starting with one mole of a compound X, it is found that the reaction is 34, complete in 1 min. What is the rate constant if the reaction follows first order?

Which one of the following group of atoms or ions is not isoelectronic?

Which of the following are correct about physisorption?1) Decrease in entropy of system2) Decrease in enthalpy3) The value of TdS is positive4) It is reversible in nature

Calculate packing fraction in the following case to two decimal places. All circles are of equal radius.Multiply the answer by 100 and enter the value.___

A photon was absorbed by a hydrogen atom and an electron was promoted to the 5th shell. When the excited electron returned to ground state, a visible photon and another quanta were emitted. Which transition is responsible for the emission of the other quanta?

A compact car gets 20 miles per litre on the highway. Gasoline contains 84.0% carbon by mass and has a density of 0.80 g ml−1. The mass of CO2 produced (in g) during a 50 mile-trip is:6160

The IUPAC name of ethyl isopropyl ketone is

For the following reaction, the product can be:

For bcc lattice, the edge length of the unit cell is 500 pm. The molar volume of the lattice is ?

The I.U.P.A.C. name for [Ni(NH3)4][NiCl4] is:

4.4 g of a gas at STP occupies a volume of 2.24 L. The gas can be:

The correct statement about the compounds A, B and C is

Arrange in decreasing order of basicity,H2O, OH−, CH3OH,CH3O−

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

Lewis-Kossel structure of N2 is

Which one of the following compounds is an allylic halide?

What particle is produced when Phosphorus-29 decays to silicon-29?

Calculate the pH at which an acid indicator (HIn) having KIn=10−5 changes its colour. Given, the HIn concentration is 10−3 M.

If the absorbate is held on asurface by weak Vander Waal's forces,the absorption process is called [Kerala(Med.) 2002]

The ability of an ion to bring about coagulation of a given colloid dependsupon

What will happen when D - (+) - glucose is treated with methanolic - HCl followed by Tollens' reagent ?

Pressure of a mixture of 4 g of O2 and 2 g of H2 confined in a bulb of 1 litre at 0°C is___.

Fedlspars and zeolites are examples of:

One of the ways in which monomers are converted to polymeric form is by [DCE 2002]

N2+3H2→2NH31 mol of N2 and 4 mol of H2 are taken in a 15 L flask at 27∘C. After the complete conversion of N2 into NH3, 5 L of H2O is added. The pressure set up in the flask is:

In Van der Waals equation of state of the gas law, the constant b is a measure of__.

Among the following ions which has highest paramagnetism

The formation of which of the following polymers involves hydrolysis reaction?

For a sample of perfect gas when its preesure is changed isothermally from pi to pf, the entropy change is given by

Teflon, polystyrene and neoprene are all ________.

IUPAC name of the compoundH2N−O||C−CH|CH−CH3|CH3−C(CH3)3?

The number of bonding and antibonding electrons respectively in CO molecule is

The velocity of neutrons in a nuclear reactor is slowed down by using:

Glucose reacts with Tollen’s reagent to give a derivative of:

Colloidal solution is prepared by following reaction AgNO3 (excess )+KI→AgI↓+KNO3. The most effective electrolyte in the coagulation of this colloidal solution is:

If the following orbital's are hybridized, then the hybridization will be respectively: (i) One s orbital, two p orbitals (ii) One s orbital, three p orbitals (iii) One s orbital, one p orbital

Which nomenclature is not according to IUPAC system?

Sort the following according to the decreasing order of magnetic moments.

A glass tube of volume 112 ml containing a gas is partially evacuated till the pressure in it drops to 3.8×10−5 torr at 00 C. The number of molecules of the gas remaining in the tube is

Absorption of energy by an atom of hydrogen in the ground state results in the ejection of electron with de-Broglie wavelength λ=4.7×10−10 m. calculate the velocity of ejected photon.

Although there are several ores, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction. Iron is removed from chalcopyrite as:

For the gaseous reaction, pA+qB⇌qC+pD, which of the following relationship is true?

As per postulates of Werner's theory for coordination compound

Among Alkaline earth metals, the element predominantly forming covalent compounds is:

What is (X) in the following reaction?

The solubility of CaF2 is 2 × 10−4. Its solubilily product KSP is