46295 + Interview Questions in Chemistry

1.	Describe the bulk preparation of dihydrogen by electrolytic method. What is the role of an electrolyte in this process?
Answer» Describe the bulk preparation of dihydrogen by electrolytic method. What is the role of an electrolyte in this process?

Discussion

2.	Identify X in the reaction below :
Answer» Identify X in the reaction below :

Discussion

3.	Match the properties of the species in Column I with the calculated number in Column II. Column IColumn IIi.Number of protons in the element with mass number 81p.50and having 31.7% more neutrons than protonsii.Ionic mass of M2+ which is isoelectronic of CO2 and hasq.26(Z+2) neutrons.iii.Ionic mass of X− with 17 protons and having 11.1%r.35more neutrons than electronsiv.Atomic number of M3+ with mass number 56 and havings.3730.4% more neutrons than electrons
Answer» Match the properties of the species in Column I with the calculated number in Column II. $\begin{matrix} Column I & Column II i . & Number of protons in the element with mass number 81 & p . & 50 and having 31.7 % more neutrons than protons i i . & Ionic mass of M^{2 +} which is isoelectronic of C O_{2} and has & q . & 26 (Z+2) neutrons . i i i . & Ionic mass of X^{-} with 17 protons and having 11.1 % & r . & 35 more neutrons than electrons i v . & Atomic number of M^{3 +} with mass number 56 and having & s . & 37 30.4 % more neutrons than electrons \end{matrix}$

Discussion

4.	At low pressures, the van der waals equation is written as [p+av2]V=RT. The compressibility factor is then equal to
Answer» At low pressures, the van der waals equation is written as $[p + \frac{a}{v^{2}}] V = R T$ . The compressibility factor is then equal to

Discussion

5.	Compounds that on hydrogenation produce optically inactive compounds are
Answer» Compounds that on hydrogenation produce optically inactive compounds are

Discussion

6.	Which of the following pair of compounds can be separated by aq. NaHCO3?
Answer» Which of the following pair of compounds can be separated by aq. $N a H C O_{3}$ ?

Discussion

7.	The solid NaCI is a bad conductor of electricity since[AIIMS 1980]
Answer» The solid NaCI is a bad conductor of electricity since [AIIMS 1980]

7.

The solid NaCI is a bad conductor of electricity since[AIIMS 1980]

Answer»

The solid NaCI is a bad conductor of electricity since

[AIIMS 1980]

Discussion

8.	Can vandeerwaals radius be calculated for all elements?
Answer» Can vandeerwaals radius be calculated for all elements?

Discussion

9.	sol has a negative charge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT 1983;MP PET 1999]
Answer» sol has a negative charge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT 1983;MP PET 1999]

9.

sol has a negative charge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT 1983;MP PET 1999]

Answer»

sol has a negative charge. Capacity to precipitate it is highest in

[CPMT 1982, 89, 93; DPMT 1983;MP PET 1999]

Discussion

10.	Common name of terfradine
Answer» Common name of terfradine

Discussion

11.	What happens when crystals of washing soda are exposed to air?
Answer» What happens when crystals of washing soda are exposed to air?

Discussion

12.	How can the screening effect can be classified strong or week screening
Answer» How can the screening effect can be classified strong or week screening

Discussion

13.	High concentration of fluoride is poisonous and harmful to bone and teeth at levels over
Answer» High concentration of fluoride is poisonous and harmful to bone and teeth at levels over

Discussion

14.	The donor sites of (EDTA)4– are ?
Answer» The donor sites of $(E D T A)^{4 -}$ are ?

Discussion

15.	The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen? (a) 0.8×105 atm (b) 0.008 Nm−2 (c) 8×104 Nm−2 (d) 0.25 atm
Answer» The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen? (a) $0.8 \times 10^{5} a t m$ (b) $0.008 N m^{- 2}$ (c) $8 \times 10^{4} N m^{- 2}$ (d) 0.25 atm

15.

The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen? (a) 0.8×105 atm (b) 0.008 Nm−2 (c) 8×104 Nm−2 (d) 0.25 atm

Answer»

The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen?

(a) $0.8 \times 10^{5} a t m$ (b) $0.008 N m^{- 2}$ (c) $8 \times 10^{4} N m^{- 2}$ (d) 0.25 atm

Discussion

16.	In the reaction The product E is:
Answer» In the reaction The product E is:

Discussion

17.	Which of the following statements is incorrect about the collision theory of chemical reaction? (a) It considers reacting molecules or atoms to be hard spheres and ignores their structural features (b) Number of effective collisions determines the rate of reaction (c) Collision of atoms or molecules possessing sufficient threshold energy results into the product formation (d) Molecules should collide with sufficient threshold energy and proper orientation for the collision to be effective
Answer» Which of the following statements is incorrect about the collision theory of chemical reaction? (a) It considers reacting molecules or atoms to be hard spheres and ignores their structural features (b) Number of effective collisions determines the rate of reaction (c) Collision of atoms or molecules possessing sufficient threshold energy results into the product formation (d) Molecules should collide with sufficient threshold energy and proper orientation for the collision to be effective

17.

Which of the following statements is incorrect about the collision theory of chemical reaction? (a) It considers reacting molecules or atoms to be hard spheres and ignores their structural features (b) Number of effective collisions determines the rate of reaction (c) Collision of atoms or molecules possessing sufficient threshold energy results into the product formation (d) Molecules should collide with sufficient threshold energy and proper orientation for the collision to be effective

Answer»

Which of the following statements is incorrect about the collision theory of chemical reaction?

(a) It considers reacting molecules or atoms to be hard spheres and ignores their structural features
(b) Number of effective collisions determines the rate of reaction
(c) Collision of atoms or molecules possessing sufficient threshold energy results into the product formation
(d) Molecules should collide with sufficient threshold energy and proper orientation for the collision to be effective

Discussion

18.	Question 06 Low concentration of oxygen in the blood and tissues of people living at high altitude is due to.............. (a) low temperature (b) low atmospheric pressure (c) high atmospheric pressure (d) Both low temperature and high atmospheric pressure
Answer» Question 06 Low concentration of oxygen in the blood and tissues of people living at high altitude is due to.............. (a) low temperature (b) low atmospheric pressure (c) high atmospheric pressure (d) Both low temperature and high atmospheric pressure

Discussion

19.	Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH– (b) F– (c) H+ (d) BCl3.
Answer» Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) $O H^{-}$ (b) $F^{-}$ (c) $H^{+}$ (d) $B C l_{3} .$

Discussion

20.	An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralise 10 mL of this solution is
Answer» An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralise 10 mL of this solution is

Discussion

21.	Which of the following has the same pH as 1 L of a 0.1 M CH3COOH solution? Ka=1.8×10−5 for CH3COOH Take (1.34)2=1.8
Answer» Which of the following has the same pH as 1 L of a 0.1 M $C H_{3} C O O H$ solution? $K_{a} = 1.8 \times 10^{- 5}$ for $C H_{3} C O O H$ Take $(1.34)^{2} = 1.8$

Discussion

22.	What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn 1 L of propane gas (C3H8) completely, measured under the same conditions?
Answer» What volume of oxygen gas $(O_{2})$ measured at $0^{\circ} C$ and $1 atm$ is needed to burn $1 L$ of propane gas $(C_{3} H_{8})$ completely, measured under the same conditions?

Discussion

23.	Which of the following reagents will give the maximum yield of 3-fluorobromobenzene?
Answer» Which of the following reagents will give the maximum yield of 3-fluorobromobenzene?

Discussion

24.	Which of the following compound is most stable?
Answer» Which of the following compound is most stable?

Discussion

25.	0.2 M solution of formic acid is ionized 3.2%, its ionization constant is
Answer» 0.2 M solution of formic acid is ionized 3.2 $%$ , its ionization constant is

Discussion

26.	The number of moles of oxalate ions oxidized by one mole of MnO−4 ion in acidic medium.
Answer» The number of moles of oxalate ions oxidized by one mole of $M n O_{4}^{-}$ ion in acidic medium.

Discussion

27.	Which of the following compounds can be expected to decarboxylate when heated?
Answer» Which of the following compounds can be expected to decarboxylate when heated?

Discussion

28.	Calculate the efficiency of a Carnot engine working between boiling point and freezing point of water.
Answer» Calculate the efficiency of a Carnot engine working between boiling point and freezing point of water.

Discussion

29.	For a solid with the following structure, the co-ordination number of the point B is:
Answer» For a solid with the following structure, the co-ordination number of the point B is:

29.

For a solid with the following structure, the co-ordination number of the point B is:

Answer»

For a solid with the following structure, the co-ordination number of the point B is:

Discussion

30.	Which of the following species are pseudohalides? CN⊖,SCN⊖,OCN⊖,acac,SO2−3,S2O2−3,en,NC⊖,TeCN⊖,N⊖3,CO2−3
Answer» Which of the following species are pseudohalides? $C N^{⊖}, S C N^{⊖}, O C N^{⊖}, a c a c, S O_{3}^{2 -}, S_{2} O_{3}^{2 -}, e n, N C^{⊖}, T e C N^{⊖}, N_{3}^{⊖}, C O_{3}^{2 -}$

Discussion

31.	Which of the following will give a faster solvolysis in aqueous ethanol more rapidly?
Answer» Which of the following will give a faster solvolysis in aqueous ethanol more rapidly?

Discussion

32.	QUESTION 2.23(i) Suggest the most important type of intermolecular attractive interaction in the following pairs. (i) n - hexane and n - octane (ii) I2 and CCl4 (iii) NaClO4 and water (iv) Methanol and acetone (v) Acetonitrile (CH3CN) and acetone (C3H6O)
Answer» QUESTION 2.23(i) Suggest the most important type of intermolecular attractive interaction in the following pairs. (i) n - hexane and n - octane (ii) $I_{2} a n d C C l_{4}$ (iii) $N a C l O_{4} a n d w a t e r$ (iv) Methanol and acetone (v) Acetonitrile $(C H_{3} C N)$ and acetone $(C_{3} H_{6} O)$

32.

QUESTION 2.23(i) Suggest the most important type of intermolecular attractive interaction in the following pairs. (i) n - hexane and n - octane (ii) I2 and CCl4 (iii) NaClO4 and water (iv) Methanol and acetone (v) Acetonitrile (CH3CN) and acetone (C3H6O)

Answer»

QUESTION 2.23(i)

Suggest the most important type of intermolecular attractive interaction in the following pairs.

(i) n - hexane and n - octane

(ii) $I_{2} a n d C C l_{4}$

(iii) $N a C l O_{4} a n d w a t e r$

(iv) Methanol and acetone

(v) Acetonitrile $(C H_{3} C N)$ and acetone $(C_{3} H_{6} O)$

Discussion

33.	Which one of the following compounds will be most easily attacked by an electrophile?
Answer» Which one of the following compounds will be most easily attacked by an electrophile?

Discussion

34.	Which one of the following substances has the highest proton affinity?
Answer» Which one of the following substances has the highest proton affinity?

Discussion

35.	Which of the following is/are examples of amphoteric oxide?
Answer» Which of the following is/are examples of amphoteric oxide?

Discussion

36.	Calculate the temperature of the gas (in kelvin) if it obeys van der Waals' equation from the following data. A flask of 2.5 L contains 10 mol of a gas under 50 atm. Given (a=5.46 atm L2 mol−2, b=0.031 L mol−1).
Answer» Calculate the temperature of the gas (in kelvin) if it obeys van der Waals' equation from the following data. A flask of $2.5 L$ contains $10 mol$ of a gas under $50 atm$ . Given $(a = 5.46 {atm L}^{2} {mol}^{- 2}, b = 0.031 {L mol}^{- 1})$ .

Discussion

37.	The expression to compute pH of NH4Cl solution is (at 298 K)
Answer» The expression to compute pH of $N H_{4} C l$ solution is (at 298 K)

Discussion

38.	Why charge on alpha particle is +2e?
Answer» Why charge on alpha particle is +2e?

Discussion

39.	Which is the most stable chair conformer of this compound?
Answer» Which is the most stable chair conformer of this compound?

Discussion

40.	What is the molarity of OH– in the final solution prepared by mixing 20.0 mL of 0.10 M H2SO4 with 30.0 mL of 0.10 M Ba(OH)2?
Answer» What is the molarity of $O H^{-}$ in the final solution prepared by mixing 20.0 mL of $0.10 M$ $H_{2} S O_{4}$ with 30.0 mL of $0.10 M$ $B a (O H)_{2}$ ?

Discussion

41.	Between methane ethane and Acetylene which will have greater calorific value explain very detailed
Answer» Between methane ethane and Acetylene which will have greater calorific value explain very detailed

Discussion

42.	Two identical glass bulbs are interconnected by a thin glass tube. A gas is filled in these bulbs at NTP (take temperature as 273 Kelvin). If one bulb is placed in ice at 0∘ C and another bulb is placed inside hot bath, then the pressure of the gas becomes 1.5 times of initial value. The temperature of hot bath is 91×n in degree celsius , then the value of n is, where n is an integer (take the nearest integer)
Answer» Two identical glass bulbs are interconnected by a thin glass tube. A gas is filled in these bulbs at NTP (take temperature as $273$ Kelvin). If one bulb is placed in ice at $0^{\circ} C$ and another bulb is placed inside hot bath, then the pressure of the gas becomes $1.5$ times of initial value. The temperature of hot bath is $91 \times n$ in degree celsius , then the value of $n$ is, where $n$ is an integer (take the nearest integer)

Discussion

43.	Li+N2Δ⟶AH2O⟶B+(C) gas, then the correctly matched pair for A, B and C are:
Answer» $L i + N_{2} Δ ⟶ A H_{2} O ⟶ B + (C)$ gas, then the correctly matched pair for A, B and C are:

Discussion

44.	Among P, Q, R and S the aromatic compound(s) is/are
Answer» Among P, Q, R and S the aromatic compound(s) is/are

Discussion

45.	Some desert beetles can survive on “metabolic water” without ever drinking liquid water. This metabolic water is
Answer» Some desert beetles can survive on “metabolic water” without ever drinking liquid water. This metabolic water is

Discussion

46.	What is the basicity of H3PO3?
Answer» What is the basicity of $H_{3} P O_{3}$ ?

Discussion

47.	Examine the following statementsA.Themaximum covalency of Be is 4 while that of other elements is 6B.Solubility of sulphates of IIA group elements in water increases from Be to BaC.The most abundant alkaline earth metal in the earth's crust is calciumD.Calcium carbonate dissolves in water in presence of CO2 to form the water soluble Ca( HCO3)2The correct statements are
Answer» Examine the following statements A.Themaximum covalency of Be is 4 while that of other elements is 6 B.Solubility of sulphates of IIA group elements in water increases from Be to Ba C.The most abundant alkaline earth metal in the earth's crust is calcium D.Calcium carbonate dissolves in water in presence of CO₂ to form the water soluble Ca( HCO₃)₂ The correct statements are

47.

Examine the following statementsA.Themaximum covalency of Be is 4 while that of other elements is 6B.Solubility of sulphates of IIA group elements in water increases from Be to BaC.The most abundant alkaline earth metal in the earth's crust is calciumD.Calcium carbonate dissolves in water in presence of CO2 to form the water soluble Ca( HCO3)2The correct statements are

Answer»

Examine the following statements

A.Themaximum covalency of Be is 4 while that of other elements is 6

B.Solubility of sulphates of IIA group elements in water increases from Be to Ba

C.The most abundant alkaline earth metal in the earth's crust is calcium

D.Calcium carbonate dissolves in water in presence of CO₂ to form the water soluble Ca( HCO₃)₂

The correct statements are

Discussion

48.	How is isopropyl chloride prepared using. Chlorine gas?
Answer» How is isopropyl chloride prepared using. Chlorine gas?

Discussion

49.	An element is represented by ZXA, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element. Mass number (A) = Number of protons (Z) + Number of neutrons. Isotopes: Atoms having same number of proton Isobar: Elements having same mass number Isotones: Elements having same number of neutron (A-Z) An isotone of 9040Zr is _________.
Answer» An element is represented by $_{Z} X^{A}$ , where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element. Mass number (A) = Number of protons (Z) + Number of neutrons. Isotopes: Atoms having same number of proton Isobar: Elements having same mass number Isotones: Elements having same number of neutron (A-Z) An isotone of $_{40}^{90} Z r$ is _________.

Discussion

50.	The solubility of noble gases in water shows the order:
Answer» The solubility of noble gases in water shows the order:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Describe the bulk preparation of dihydrogen by electrolytic method. What is the role of an electrolyte in this process?

Identify X in the reaction below :

At low pressures, the van der waals equation is written as [p+av2]V=RT. The compressibility factor is then equal to

Compounds that on hydrogenation produce optically inactive compounds are

Which of the following pair of compounds can be separated by aq. NaHCO3?

The solid NaCI is a bad conductor of electricity since[AIIMS 1980]

Can vandeerwaals radius be calculated for all elements?

sol has a negative charge. Capacity to precipitate it is highest in [CPMT 1982, 89, 93; DPMT 1983;MP PET 1999]

Common name of terfradine

What happens when crystals of washing soda are exposed to air?

How can the screening effect can be classified strong or week screening

High concentration of fluoride is poisonous and harmful to bone and teeth at levels over

The donor sites of (EDTA)4– are ?

The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen? (a) 0.8×105 atm (b) 0.008 Nm−2 (c) 8×104 Nm−2 (d) 0.25 atm

In the reaction The product E is:

Question 06 Low concentration of oxygen in the blood and tissues of people living at high altitude is due to.............. (a) low temperature (b) low atmospheric pressure (c) high atmospheric pressure (d) Both low temperature and high atmospheric pressure

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH– (b) F– (c) H+ (d) BCl3.

An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralise 10 mL of this solution is

Which of the following has the same pH as 1 L of a 0.1 M CH3COOH solution? Ka=1.8×10−5 for CH3COOH Take (1.34)2=1.8

What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn 1 L of propane gas (C3H8) completely, measured under the same conditions?

Which of the following reagents will give the maximum yield of 3-fluorobromobenzene?

Which of the following compound is most stable?

0.2 M solution of formic acid is ionized 3.2%, its ionization constant is

The number of moles of oxalate ions oxidized by one mole of MnO−4 ion in acidic medium.

Which of the following compounds can be expected to decarboxylate when heated?

Calculate the efficiency of a Carnot engine working between boiling point and freezing point of water.

For a solid with the following structure, the co-ordination number of the point B is:

Which of the following species are pseudohalides? CN⊖,SCN⊖,OCN⊖,acac,SO2−3,S2O2−3,en,NC⊖,TeCN⊖,N⊖3,CO2−3

Which of the following will give a faster solvolysis in aqueous ethanol more rapidly?

QUESTION 2.23(i) Suggest the most important type of intermolecular attractive interaction in the following pairs. (i) n - hexane and n - octane (ii) I2 and CCl4 (iii) NaClO4 and water (iv) Methanol and acetone (v) Acetonitrile (CH3CN) and acetone (C3H6O)

Which one of the following compounds will be most easily attacked by an electrophile?

Which one of the following substances has the highest proton affinity?

Which of the following is/are examples of amphoteric oxide?

Calculate the temperature of the gas (in kelvin) if it obeys van der Waals' equation from the following data. A flask of 2.5 L contains 10 mol of a gas under 50 atm. Given (a=5.46 atm L2 mol−2, b=0.031 L mol−1).

The expression to compute pH of NH4Cl solution is (at 298 K)

Why charge on alpha particle is +2e?

Which is the most stable chair conformer of this compound?

What is the molarity of OH– in the final solution prepared by mixing 20.0 mL of 0.10 M H2SO4 with 30.0 mL of 0.10 M Ba(OH)2?

Between methane ethane and Acetylene which will have greater calorific value explain very detailed

Li+N2Δ⟶AH2O⟶B+(C) gas, then the correctly matched pair for A, B and C are:

Among P, Q, R and S the aromatic compound(s) is/are

Some desert beetles can survive on “metabolic water” without ever drinking liquid water. This metabolic water is

What is the basicity of H3PO3?

How is isopropyl chloride prepared using. Chlorine gas?

The solubility of noble gases in water shows the order: