15280 + Interview Questions in Chemistry Page 260 InterviewSolution

12951.	The functional group present in butanone is _________.
Answer» The functional group present in butanone is _________.

Discussion

12952.	Question 20.1 Explain the following term with one example: Corrosion.
Answer» Question 20.1 Explain the following term with one example: Corrosion.

Discussion

12953.	Give examples of covalent compounds which contain : (a) One unshared pair of electron (b) Two unshared pairs of electrons.
Answer» Give examples of covalent compounds which contain : (a) One unshared pair of electron (b) Two unshared pairs of electrons.

12953.

Give examples of covalent compounds which contain : (a) One unshared pair of electron (b) Two unshared pairs of electrons.

Answer»

Give examples of covalent compounds which contain :

(a) One unshared pair of electron (b) Two unshared pairs of electrons.

Discussion

12954.	Which of the following forms M3+ more easily among group 13 elements?
Answer» Which of the following forms M³⁺ more easily among group 13 elements?

Discussion

12955.	An element ‘X’ has mass number 27. If the number of electrons is given as 13, the number of neutrons is:
Answer» An element ‘X’ has mass number 27. If the number of electrons is given as 13, the number of neutrons is:

Discussion

12956.	Define a combination reaction. Give one example of a combination reaction which is also exothermic. [2 MARKS]
Answer» Define a combination reaction. Give one example of a combination reaction which is also exothermic. [2 MARKS]

Discussion

12957.	(a) Explain the following in terms of gain or loss of oxygen with one example each : (i) oxidation (ii) reduction (b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
Answer» (a) Explain the following in terms of gain or loss of oxygen with one example each : (i) oxidation (ii) reduction (b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.

12957.

(a) Explain the following in terms of gain or loss of oxygen with one example each : (i) oxidation (ii) reduction (b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.

Answer»

(a) Explain the following in terms of gain or loss of oxygen with one example each :

(i) oxidation (ii) reduction

(b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.

Discussion

12958.	When ammonium hydroxide is added to solution B, a plae blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. What is the cation [positive ion] present in solution B ? What is the probable colour of solution B.
Answer» When ammonium hydroxide is added to solution B, a plae blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. What is the cation [positive ion] present in solution B ? What is the probable colour of solution B.

Discussion

12959.	Calculate the mass of 0.1 mole of carbon dioxide. [Atomic mass: S = 32, C = 12 and O=16 and Avogadro's Number = 6 x 1023]
Answer» Calculate the mass of 0.1 mole of carbon dioxide. [Atomic mass: S = 32, C = 12 and O=16 and Avogadro's Number = 6 x 10²³]

12959.

Calculate the mass of 0.1 mole of carbon dioxide. [Atomic mass: S = 32, C = 12 and O=16 and Avogadro's Number = 6 x 1023]

Answer»

Calculate the mass of 0.1 mole of carbon dioxide.

[Atomic mass: S = 32, C = 12 and O=16 and Avogadro's Number = 6 x 10²³]

Discussion

12960.	Write the : (a) molecular formula, (b) electron dot formula and (c) structural formula of methane and ethane.
Answer» Write the : (a) molecular formula, (b) electron dot formula and (c) structural formula of methane and ethane.

Discussion

12961.	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

12962.	State one example of a Dobereiner’s triad, showing in it that the atomic mass of the middle element is half-way between those of the other two.
Answer» State one example of a Dobereiner’s triad, showing in it that the atomic mass of the middle element is half-way between those of the other two.

Discussion

12963.	(a) What is meant by catenation? (b) Write the structural formula of all possible isomers of hexane.
Answer» (a) What is meant by catenation? (b) Write the structural formula of all possible isomers of hexane.

12963.

(a) What is meant by catenation? (b) Write the structural formula of all possible isomers of hexane.

Answer»

(a) What is meant by catenation?

(b) Write the structural formula of all possible isomers of hexane.

Discussion

12964.	I understood that how electrons act like a glue but what intermolecular force is acting between two atoms of copper or iron does it Vander de walls'?
Answer» I understood that how electrons act like a glue but what intermolecular force is acting between two atoms of copper or iron does it Vander de walls'?

Discussion

12965.	(a) Name any one metal each which can be extracted by: (i) reduction with carbon (ii) Electrolytic reduction (iii) Reduction with aluminium (iv) Reduction with heat alone (b) Write a chemical equation for any of the above four parts.
Answer» (a) Name any one metal each which can be extracted by: (i) reduction with carbon (ii) Electrolytic reduction (iii) Reduction with aluminium (iv) Reduction with heat alone (b) Write a chemical equation for any of the above four parts.

Discussion

12966.	Gravity separation is also known as ___
Answer» Gravity separation is also known as ___

Discussion

12967.	The IUPAC name of the compound
Answer» The IUPAC name of the compound

Discussion

12968.	The process of electrolysis involves
Answer» The process of electrolysis involves

Discussion

12969.	Which one of the following reactions involves the combination of two elements?
Answer» Which one of the following reactions involves the combination of two elements?

Discussion

12970.	Which among the following solution can be used as an electrolyte for the electrorefining of copper?
Answer» Which among the following solution can be used as an electrolyte for the electrorefining of copper?

Discussion

12971.	Laissaigne's extract is made to:
Answer» Laissaigne's extract is made to:

Discussion

12972.	(a) The blue colour of crystals of a substance changed on heating in a closed test tube but the colour was regained after sometime on cooling. Name the substance and write its chemical formula. Explain the phenomenon involved. (b) Write name and chemical formula of two such compounds whose one formula unit is associated with 10 and 2 water molecules respectively.
Answer» (a) The blue colour of crystals of a substance changed on heating in a closed test tube but the colour was regained after sometime on cooling. Name the substance and write its chemical formula. Explain the phenomenon involved. (b) Write name and chemical formula of two such compounds whose one formula unit is associated with 10 and 2 water molecules respectively.

Discussion

12973.	The shape of a salt bridge is
Answer» The shape of a salt bridge is

Discussion

12974.	Which of the following is the structure of C6H12?
Answer» Which of the following is the structure of $C_{6} H_{12}$ ?

Discussion

12975.	In the modern periodic table, the period indicates the value of
Answer» In the modern periodic table, the period indicates the value of

Discussion

12976.	Why HCl does not show its acidic nature on dry litmus but only with wet litmus ?
Answer» Why HCl does not show its acidic nature on dry litmus but only with wet litmus ?

Discussion

12977.	Question 1 Carbon exists in the atmosphere primarily in the form of: (a) Carbon monoxide only (b) Carbon monoxide and carbon dioxide (c) Carbon dioxide only (d) Methane
Answer» Question 1 Carbon exists in the atmosphere primarily in the form of: (a) Carbon monoxide only (b) Carbon monoxide and carbon dioxide (c) Carbon dioxide only (d) Methane

Discussion

12978.	Identify the balanced chemical reaction of sodium with ethanol.
Answer» Identify the balanced chemical reaction of sodium with ethanol.

Discussion

12979.	An element 'X' belongs to group 14. Which of the following property do you think element 'X' will show?
Answer» An element 'X' belongs to group 14. Which of the following property do you think element 'X' will show?

Discussion

12980.	3 people A , B and C are sitting in a circular fashion. Find the total number of seating arrangements.
Answer» 3 people A , B and C are sitting in a circular fashion. Find the total number of seating arrangements.

Discussion

12981.	The correct functional group X and the reagent/reaction conditions Y in the following scheme are (IIT-JEE, 2011)
Answer» The correct functional group X and the reagent/reaction conditions Y in the following scheme are (IIT-JEE, 2011)

Discussion

12982.	While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt ? (a) To reduce the basic nature of the soap (b) To make the soap neutral (c) To enhance the cleansing power of the soap (d) To favour the precipitation of the soap
Answer» While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt ? (a) To reduce the basic nature of the soap (b) To make the soap neutral (c) To enhance the cleansing power of the soap (d) To favour the precipitation of the soap

Discussion

12983.	The symbol used to denote a liquid reactant or product in a reaction is:
Answer» The symbol used to denote a liquid reactant or product in a reaction is:

Discussion

12984.	Chloroamphenicol is an
Answer» Chloroamphenicol is an

Discussion

12985.	State laws of chemical combination.
Answer» State laws of chemical combination.

Discussion

12986.	Which of the following metals is present in the anode mud during the electrolytic refining of copper ?? A)Na B)Al C)Au D)Fe
Answer» Which of the following metals is present in the anode mud during the electrolytic refining of copper ?? A)Na B)Al C)Au D)Fe

12986.

Which of the following metals is present in the anode mud during the electrolytic refining of copper ?? A)Na B)Al C)Au D)Fe

Answer»

Which of the following metals is present in the anode mud during the electrolytic refining of copper ??

A)Na

B)Al

C)Au

D)Fe

Discussion

12987.	X and Y are two elements which form X2Y3 and XY2 molecules. If 0.15 mole of X2Y3 and XY2 weighs 15.9 g and 9.3 g respectively. What are the atomic mass of X and Y.
Answer» X and Y are two elements which form X₂Y₃and XY₂ molecules. If 0.15 mole of X₂Y₃ and XY₂ weighs 15.9 g and 9.3 g respectively. What are the atomic mass of X and Y.

Discussion

12988.	In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are:
Answer» In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are:

Discussion

12989.	A helium-filled balloon has a volume of 2.75 L at 20∘C. The volume of the balloon decreases to 2.46 L after it is placed outside on a cold day. What is the outside temperature in ∘ C?
Answer» A helium-filled balloon has a volume of 2.75 L at $20^{\circ}$ C. The volume of the balloon decreases to 2.46 L after it is placed outside on a cold day. What is the outside temperature in $^{\circ}$ C?

Discussion

12990.	How to get elemental boron from boric acid
Answer» How to get elemental boron from boric acid

Discussion

12991.	Give reason for the following. a) Zinc sulphate is called a salt. b) SO2 is called an acidic oxide c) Al2O3 is called a basic oxide.
Answer» Give reason for the following. a) Zinc sulphate is called a salt. b) SO2 is called an acidic oxide c) Al2O3 is called a basic oxide.

12991.

Give reason for the following. a) Zinc sulphate is called a salt. b) SO2 is called an acidic oxide c) Al2O3 is called a basic oxide.

Answer»

Give reason for the following.

a) Zinc sulphate is called a salt.

b) SO2 is called an acidic oxide

c) Al2O3 is called a basic oxide.

Discussion

12992.	Why does only carbon show catenation. ? Hydrogen, lithium, boron, beryllium also have very small size atoms even smaller than the carbon atom. But still, only carbon show catenation because it is able to create a very strong bond with other atoms. Why don't hydrogen, boron, beryllium, lithium creates such strong bonds since their atom's size is very very small ??
Answer» Why does only carbon show catenation. ? Hydrogen, lithium, boron, beryllium also have very small size atoms even smaller than the carbon atom. But still, only carbon show catenation because it is able to create a very strong bond with other atoms. Why don't hydrogen, boron, beryllium, lithium creates such strong bonds since their atom's size is very very small ??

Discussion

12993.	If the ionic radii of K+ and F− are nearly the same (i.e 1.34 ˚A) then the atomic radii of K and F are respectively are
Answer» If the ionic radii of $K^{+}$ and $F^{-}$ are nearly the same (i.e $1.34 ˚ A$ ) then the atomic radii of $K$ and $F$ are respectively are

Discussion

12994.	Name the scientist who disproved the 'vital force theory' for the formation of organic compounds.
Answer» Name the scientist who disproved the 'vital force theory' for the formation of organic compounds.

Discussion

12995.	Which of the following has maximum boiling point?
Answer» Which of the following has maximum boiling point?

Discussion

12996.	An ___ is a mineral from which a metal can be extracted easily and profitably.
Answer» An ___ is a mineral from which a metal can be extracted easily and profitably.

Discussion

12997.	Complete the following 2Al2O3+3C→4A+3B. A & B are as follows.
Answer» Complete the following $2 A l_{2} O_{3} + 3 C \to 4 A + 3 B$ . A & B are as follows.

12997.

Complete the following 2Al2O3+3C→4A+3B. A & B are as follows.

Answer»

Complete the following

$2 A l_{2} O_{3} + 3 C \to 4 A + 3 B$ . A & B are as follows.

Discussion

12998.	How can we prevent rancidity? [5 MARKS]
Answer» How can we prevent rancidity? [5 MARKS]

Discussion

12999.	Which of the following is position isomer of :
Answer» Which of the following is position isomer of :

12999.

Which of the following is position isomer of :

Answer»

Which of the following is position isomer of

:

Discussion

13000.	Enter the number of functional isomer possible for propanone (CH3COCH3).1
Answer» Enter the number of functional isomer possible for propanone ( $C H_{3} C O C H_{3}$ ). 1

Discussion

Explore topic-wise InterviewSolutions in .

The functional group present in butanone is _________.

Question 20.1 Explain the following term with one example: Corrosion.

Give examples of covalent compounds which contain : (a) One unshared pair of electron (b) Two unshared pairs of electrons.

Which of the following forms M3+ more easily among group 13 elements?

An element ‘X’ has mass number 27. If the number of electrons is given as 13, the number of neutrons is:

Define a combination reaction. Give one example of a combination reaction which is also exothermic. [2 MARKS]

(a) Explain the following in terms of gain or loss of oxygen with one example each : (i) oxidation (ii) reduction (b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.

When ammonium hydroxide is added to solution B, a plae blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. What is the cation [positive ion] present in solution B ? What is the probable colour of solution B.

Calculate the mass of 0.1 mole of carbon dioxide. [Atomic mass: S = 32, C = 12 and O=16 and Avogadro's Number = 6 x 1023]

Write the : (a) molecular formula, (b) electron dot formula and (c) structural formula of methane and ethane.

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

State one example of a Dobereiner’s triad, showing in it that the atomic mass of the middle element is half-way between those of the other two.

(a) What is meant by catenation? (b) Write the structural formula of all possible isomers of hexane.

I understood that how electrons act like a glue but what intermolecular force is acting between two atoms of copper or iron does it Vander de walls'?

(a) Name any one metal each which can be extracted by: (i) reduction with carbon (ii) Electrolytic reduction (iii) Reduction with aluminium (iv) Reduction with heat alone (b) Write a chemical equation for any of the above four parts.

Gravity separation is also known as ___

The IUPAC name of the compound

The process of electrolysis involves

Which one of the following reactions involves the combination of two elements?

Which among the following solution can be used as an electrolyte for the electrorefining of copper?

Laissaigne's extract is made to:

The shape of a salt bridge is

Which of the following is the structure of C6H12?

In the modern periodic table, the period indicates the value of

Why HCl does not show its acidic nature on dry litmus but only with wet litmus ?

Question 1 Carbon exists in the atmosphere primarily in the form of: (a) Carbon monoxide only (b) Carbon monoxide and carbon dioxide (c) Carbon dioxide only (d) Methane

Identify the balanced chemical reaction of sodium with ethanol.

An element 'X' belongs to group 14. Which of the following property do you think element 'X' will show?

3 people A , B and C are sitting in a circular fashion. Find the total number of seating arrangements.

The correct functional group X and the reagent/reaction conditions Y in the following scheme are (IIT-JEE, 2011)

The symbol used to denote a liquid reactant or product in a reaction is:

Chloroamphenicol is an

State laws of chemical combination.

Which of the following metals is present in the anode mud during the electrolytic refining of copper ?? A)Na B)Al C)Au D)Fe

X and Y are two elements which form X2Y3 and XY2 molecules. If 0.15 mole of X2Y3 and XY2 weighs 15.9 g and 9.3 g respectively. What are the atomic mass of X and Y.

In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are:

A helium-filled balloon has a volume of 2.75 L at 20∘C. The volume of the balloon decreases to 2.46 L after it is placed outside on a cold day. What is the outside temperature in ∘ C?

How to get elemental boron from boric acid

Give reason for the following. a) Zinc sulphate is called a salt. b) SO2 is called an acidic oxide c) Al2O3 is called a basic oxide.

If the ionic radii of K+ and F− are nearly the same (i.e 1.34 ˚A) then the atomic radii of K and F are respectively are

Name the scientist who disproved the 'vital force theory' for the formation of organic compounds.

Which of the following has maximum boiling point?

An ___ is a mineral from which a metal can be extracted easily and profitably.

Complete the following 2Al2O3+3C→4A+3B. A &amp; B are as follows.

How can we prevent rancidity? [5 MARKS]

Which of the following is position isomer of :

Enter the number of functional isomer possible for propanone (CH3COCH3).1

Complete the following 2Al2O3+3C→4A+3B. A & B are as follows.