15280 + Interview Questions in Chemistry Page 238 InterviewSolution

11851.	(a) Explain the term 'isomers'. Give one example of isomers. (b) Write (i) structural formula, and (ii) electron-dot structure, of any one isomer of n-heptane (C7H16). (c) Write IUPAC name of the compound having the formula n−C4H10. (d) Give the IUPAC names for the following :
Answer» (a) Explain the term 'isomers'. Give one example of isomers. (b) Write (i) structural formula, and (ii) electron-dot structure, of any one isomer of n-heptane ( $C_{7} H_{16}$ ). (c) Write IUPAC name of the compound having the formula $n - C_{4} H_{10}$ . (d) Give the IUPAC names for the following :

Discussion

11852.	What is the purpose of alloying?
Answer» What is the purpose of alloying?

Discussion

11853.	If the value of Avogadro number is 6.023 × 1023 mol−1 and the value of Boltzmann constant is 1.380 ×10−23 JK−1, then the number of significant digits in the calculated value of the universal gas constant is ___
Answer» If the value of Avogadro number is 6.023 $\times 10^{23} m o l^{- 1}$ and the value of Boltzmann constant is 1.380 $\times 10^{- 23} J K^{- 1},$ then the number of significant digits in the calculated value of the universal gas constant is ___

Discussion

11854.	Is the all elements of first set is called domain and the all elements of second set is called co domain am I correct?
Answer» Is the all elements of first set is called domain and the all elements of second set is called co domain am I correct?

Discussion

11855.	Is CnH2n+1 OH the general formula for alcohol?
Answer» Is CnH2n+1 OH the general formula for alcohol?

Discussion

11856.	Which group elements are called the normal elements? What are their characteristics?
Answer» Which group elements are called the normal elements? What are their characteristics?

Discussion

11857.	Write the structural formula for butane.
Answer» Write the structural formula for butane.

Discussion

11858.	Which of the following metals can be obtained from haematite ore? (a) copper (b) sodium (c) zinc (d) iron
Answer» Which of the following metals can be obtained from haematite ore? (a) copper (b) sodium (c) zinc (d) iron

Discussion

11859.	Identify isomers of C6H14 from the following-
Answer» Identify isomers of $C_{6} H_{14}$ from the following-

Discussion

11860.	State one major difference beteween covalent and ionic bonds and give one example each of covalent and ionic compounds.
Answer» State one major difference beteween covalent and ionic bonds and give one example each of covalent and ionic compounds.

Discussion

11861.	Please give notes on modern periodic table,groups,periods and position of elements
Answer» Please give notes on modern periodic table,groups,periods and position of elements

Discussion

11862.	A student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it. He observes:
Answer» A student takes $N a_{2} C O_{3}$ powder in a test tube and pours some drops of acetic acid over it. He observes:

Discussion

11863.	Zinc granules were added to zinc sulphate, copper sulphate, aluminium sulphate and iron sulphate solutions as shown below. You would observe the deposition of metal on zinc in beakers:
Answer» Zinc granules were added to zinc sulphate, copper sulphate, aluminium sulphate and iron sulphate solutions as shown below. You would observe the deposition of metal on zinc in beakers:

Discussion

11864.	(CH3)3CClNaCN−−−−→Adil.H2SO4−−−−−−→B. Compund B is
Answer» $(C H_{3})_{3} C C l N a C N - --- \to A d i l . H_{2} S O_{4} - ----- \to B$ . Compund B is

Discussion

11865.	Magnesium ribbon burns in air to produce which type of reaction?
Answer» Magnesium ribbon burns in air to produce which type of reaction?

Discussion

11866.	The element which can form an acidic oxide should be the one whose atomic number is : (a) 6 (b) 16 (c) 12 (d) 19
Answer» The element which can form an acidic oxide should be the one whose atomic number is : (a) 6 (b) 16 (c) 12 (d) 19

11866.

The element which can form an acidic oxide should be the one whose atomic number is : (a) 6 (b) 16 (c) 12 (d) 19

Answer»

The element which can form an acidic oxide should be the one whose atomic number is :

(a) 6 (b) 16 (c) 12 (d) 19

Discussion

11867.	Potassium (at No. 19) and chlorine (at No. 17) form a compound. Explain the formation of the compound on the basis of : (a) oxidation (b) reduction (c) oxidising agent (d) reducing agent.
Answer» Potassium (at No. 19) and chlorine (at No. 17) form a compound. Explain the formation of the compound on the basis of : (a) oxidation (b) reduction (c) oxidising agent (d) reducing agent.

11867.

Potassium (at No. 19) and chlorine (at No. 17) form a compound. Explain the formation of the compound on the basis of : (a) oxidation (b) reduction (c) oxidising agent (d) reducing agent.

Answer»

Potassium (at No. 19) and chlorine (at No. 17) form a compound. Explain the formation of the compound on the basis of :

(a) oxidation (b) reduction

(c) oxidising agent (d) reducing agent.

Discussion

11868.	The IUPAC name of the given compound is
Answer» The IUPAC name of the given compound is

11868.

The IUPAC name of the given compound is

Answer»

The IUPAC name of the given compound is

Discussion

11869.	The high solubility of ammonia gas in water can be demonstrated by ___ experiment.
Answer» The high solubility of ammonia gas in water can be demonstrated by ___ experiment.

Discussion

11870.	You are given the description of a process called “Vapour phase refining” Vapour Phase Refining: This involves converting the crude metal into a volatile intermediate. This intermediate should also decompose on heating at a reasonable temperature. Which of the following could be categorized under ‘Vapour phase refining’?
Answer» You are given the description of a process called “Vapour phase refining” Vapour Phase Refining: This involves converting the crude metal into a volatile intermediate. This intermediate should also decompose on heating at a reasonable temperature. Which of the following could be categorized under ‘Vapour phase refining’?

Discussion

11871.	Question 6 By considering their position in the periodic table, which one of the following elements would you expect to have maximum metallic characteristic: Ga, Ge, As, Se, Be?
Answer» Question 6 By considering their position in the periodic table, which one of the following elements would you expect to have maximum metallic characteristic: Ga, Ge, As, Se, Be?

Discussion

11872.	A sample of O2 gas is collected over water at 23∘ C at a barometric pressure of 751 mm Hg (vapour pressure of water at 23∘ C is 21 mm Hg). The partial pressure of O2 gas in the sample collected is ......
Answer» A sample of $O_{2}$ gas is collected over water at $23^{\circ}$ C at a barometric pressure of 751 mm Hg (vapour pressure of water at $23^{\circ}$ C is 21 mm Hg). The partial pressure of $O_{2}$ gas in the sample collected is ......

Discussion

11873.	For the reaction C(s) + CO2(g) ⇌ 2CO(g) the partial pressure of CO2 and CO are 2.0 and 4.0 atm respectively at equilibrium. The KP for the reaction is
Answer» For the reaction $C (s) + C O_{2} (g) ⇌ 2 C O (g)$ the partial pressure of $C O_{2}$ and $C O$ are 2.0 and 4.0 atm respectively at equilibrium. The $K_{P}$ for the reaction is

11873.

For the reaction C(s) + CO2(g) ⇌ 2CO(g) the partial pressure of CO2 and CO are 2.0 and 4.0 atm respectively at equilibrium. The KP for the reaction is

Answer»

For the reaction $C (s) + C O_{2} (g) ⇌ 2 C O (g)$ the partial pressure of $C O_{2}$ and

$C O$ are 2.0 and 4.0 atm respectively at equilibrium. The $K_{P}$ for the reaction is

Discussion

11874.	500 ml ofDilHCl is kept in beaker and 500ml of conc.H2SO4 is kept in second beaker. Both went through pH test, which among the two have lower pH.
Answer» 500 ml ofDilHCl is kept in beaker and 500ml of conc.H₂SO₄ is kept in second beaker. Both went through pH test, which among the two have lower pH.

Discussion

11875.	Draw the structure of isomers of: (a) butane (b) pentane. Write the IUPAC and common names of these isomers. [2 MARKS]
Answer» Draw the structure of isomers of: (a) butane (b) pentane. Write the IUPAC and common names of these isomers. [2 MARKS]

Discussion

11876.	How do copper silver and iron corrode when exposed to the atmosphere?
Answer» How do copper silver and iron corrode when exposed to the atmosphere?

Discussion

11877.	The property of carbon of self combination is called:
Answer» The property of carbon of self combination is called:

Discussion

11878.	Name the source from where sodium chloride is obtained
Answer» Name the source from where sodium chloride is obtained

Discussion

11879.	Match the given metal salt, non-metal and metal with the gases evolved, when they react with dil. HNO3
Answer» Match the given metal salt, non-metal and metal with the gases evolved, when they react with $d i l . H N O_{3}$

Discussion

11880.	Assertion [A]: Zinc is used in galvanisation of iron. Reason [R]: Galvanisation increases the life of iron articles by protecting them from rusting.
Answer» Assertion [A]: Zinc is used in galvanisation of iron. Reason [R]: Galvanisation increases the life of iron articles by protecting them from rusting.

Discussion

11881.	Which of the following can be a trigger for Coral Bleaching? Codes :
Answer» Which of the following can be a trigger for Coral Bleaching? Codes :

11881.

Which of the following can be a trigger for Coral Bleaching? Codes :

Answer»

Which of the following can be a trigger for Coral Bleaching?

Codes :

Discussion

11882.	Aluminium is a reactive metal but still it is used for packing food articles. Give reason.
Answer» Aluminium is a reactive metal but still it is used for packing food articles. Give reason.

Discussion

11883.	Write the harmful effects of ozone depletion.
Answer» Write the harmful effects of ozone depletion.

Discussion

11884.	Which of the following is an oxidising agent in 2Mg+O2(g)→2MgO(s)
Answer» Which of the following is an oxidising agent in $2 M g + O_{2} (g) \to 2 M g O (s)$

Discussion

11885.	Thomas model of atom
Answer» Thomas model of atom

Discussion

11886.	What happens when a copper wire is dipped in a ferrous sulphate solution?
Answer» What happens when a copper wire is dipped in a ferrous sulphate solution?

Discussion

11887.	The pyramid of biomass is inverted for ___ ecosystem.
Answer» The pyramid of biomass is inverted for ___ ecosystem.

Discussion

11888.	The IUPAC name of Acetone is:
Answer» The IUPAC name of Acetone is:

Discussion

11889.	Which of the following pairs will show displacement reaction?why? a) FeSO4 and copper metal b) FeSO4 and aluminium metal
Answer» Which of the following pairs will show displacement reaction?why? a) FeSO4 and copper metal b) FeSO4 and aluminium metal

Discussion

11890.	what are differences between metals and non-metals based on their cghemical properties
Answer» what are differences between metals and non-metals based on their cghemical properties

Discussion

11891.	A functional isomer of ethanol is
Answer» A functional isomer of ethanol is

Discussion

11892.	Who prepared ammonia by heating slaked lime with 'sal ammoniac'?
Answer» Who prepared ammonia by heating slaked lime with 'sal ammoniac'?

Discussion

11893.	A hard material X which is mined from the earth is used as a household fuel and also for the generation of electricity at Thermal Power Stations. A soft material Y is also used as a fuel in the form of candles. A gaseous material Z which occurs along with petroleum is increasingly being used as a fuel in running vehicles in its compressed form. (a) What are the materials, X, Y and Z? (b) When materials X, Y and Z are burned separately: (i) Which material burns by producing a yellow, luminous flame? (ii) Which material ultimately burns without producing a flame? (iii) Which material can burn in a gas stove by producing a blue flame?
Answer» A hard material X which is mined from the earth is used as a household fuel and also for the generation of electricity at Thermal Power Stations. A soft material Y is also used as a fuel in the form of candles. A gaseous material Z which occurs along with petroleum is increasingly being used as a fuel in running vehicles in its compressed form. (a) What are the materials, X, Y and Z? (b) When materials X, Y and Z are burned separately: (i) Which material burns by producing a yellow, luminous flame? (ii) Which material ultimately burns without producing a flame? (iii) Which material can burn in a gas stove by producing a blue flame?

Discussion

11894.	The electronic configuration of four elements are given below. Which element does not belong to same family as others?
Answer» The electronic configuration of four elements are given below. Which element does not belong to same family as others?

Discussion

11895.	Write down the reduction and oxidation half reaction of the reaction Na + F = NaF
Answer» Write down the reduction and oxidation half reaction of the reaction Na + F = NaF

11895.

Write down the reduction and oxidation half reaction of the reaction Na + F = NaF

Answer»

Write down the reduction and oxidation half reaction of the reaction

Na + F = NaF

Discussion

11896.	Draw structural formula for each of the following compounds : (a) isomer of n-butane, (b) vinegar, (c) 2-propanol (d) ethanal, (e) acetone (f) diethyl ether What is used to describe these compounds taken together ?
Answer» Draw structural formula for each of the following compounds : (a) isomer of n-butane, (b) vinegar, (c) 2-propanol (d) ethanal, (e) acetone (f) diethyl ether What is used to describe these compounds taken together ?

Discussion

11897.	Why is NH4OH unstable?
Answer» Why is NH₄OH unstable?

Discussion

11898.	______________ are exchanged or shared during a chemical reaction.
Answer» ______________ are exchanged or shared during a chemical reaction.

Discussion

11899.	Bee stings can be treated with____________ A) vinegar b) sodium hydrogen carbonate c) potassium hydroxide d) lemon juice
Answer» Bee stings can be treated with____________ A) vinegar b) sodium hydrogen carbonate c) potassium hydroxide d) lemon juice

11899.

Bee stings can be treated with____________ A) vinegar b) sodium hydrogen carbonate c) potassium hydroxide d) lemon juice

Answer»

Bee stings can be treated with____________

A) vinegar b) sodium hydrogen carbonate c) potassium hydroxide d) lemon juice

Discussion

11900.	Which properties of carbon make it a versatile element? Discuss its bonding in saturated and unsaturated hydrocarbon.
Answer» Which properties of carbon make it a versatile element? Discuss its bonding in saturated and unsaturated hydrocarbon.

Discussion

Explore topic-wise InterviewSolutions in .

(a) Explain the term 'isomers'. Give one example of isomers. (b) Write (i) structural formula, and (ii) electron-dot structure, of any one isomer of n-heptane (C7H16). (c) Write IUPAC name of the compound having the formula n−C4H10. (d) Give the IUPAC names for the following :

What is the purpose of alloying?

If the value of Avogadro number is 6.023 × 1023 mol−1 and the value of Boltzmann constant is 1.380 ×10−23 JK−1, then the number of significant digits in the calculated value of the universal gas constant is ___

Is the all elements of first set is called domain and the all elements of second set is called co domain am I correct?

Is CnH2n+1 OH the general formula for alcohol?

Which group elements are called the normal elements? What are their characteristics?

Write the structural formula for butane.

Which of the following metals can be obtained from haematite ore? (a) copper (b) sodium (c) zinc (d) iron

Identify isomers of C6H14 from the following-

State one major difference beteween covalent and ionic bonds and give one example each of covalent and ionic compounds.

Please give notes on modern periodic table,groups,periods and position of elements

A student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it. He observes:

Zinc granules were added to zinc sulphate, copper sulphate, aluminium sulphate and iron sulphate solutions as shown below. You would observe the deposition of metal on zinc in beakers:

(CH3)3CClNaCN−−−−→Adil.H2SO4−−−−−−→B. Compund B is

Magnesium ribbon burns in air to produce which type of reaction?

The element which can form an acidic oxide should be the one whose atomic number is : (a) 6 (b) 16 (c) 12 (d) 19

Potassium (at No. 19) and chlorine (at No. 17) form a compound. Explain the formation of the compound on the basis of : (a) oxidation (b) reduction (c) oxidising agent (d) reducing agent.

The IUPAC name of the given compound is

The high solubility of ammonia gas in water can be demonstrated by ___ experiment.

Question 6 By considering their position in the periodic table, which one of the following elements would you expect to have maximum metallic characteristic: Ga, Ge, As, Se, Be?

A sample of O2 gas is collected over water at 23∘ C at a barometric pressure of 751 mm Hg (vapour pressure of water at 23∘ C is 21 mm Hg). The partial pressure of O2 gas in the sample collected is ......

For the reaction C(s) + CO2(g) ⇌ 2CO(g) the partial pressure of CO2 and CO are 2.0 and 4.0 atm respectively at equilibrium. The KP for the reaction is

500 ml ofDilHCl is kept in beaker and 500ml of conc.H2SO4 is kept in second beaker. Both went through pH test, which among the two have lower pH.

Draw the structure of isomers of: (a) butane (b) pentane. Write the IUPAC and common names of these isomers. [2 MARKS]

How do copper silver and iron corrode when exposed to the atmosphere?

The property of carbon of self combination is called:

Name the source from where sodium chloride is obtained

Match the given metal salt, non-metal and metal with the gases evolved, when they react with dil. HNO3

Assertion [A]: Zinc is used in galvanisation of iron. Reason [R]: Galvanisation increases the life of iron articles by protecting them from rusting.

Which of the following can be a trigger for Coral Bleaching? Codes :

Aluminium is a reactive metal but still it is used for packing food articles. Give reason.

Write the harmful effects of ozone depletion.

Which of the following is an oxidising agent in 2Mg+O2(g)→2MgO(s)

Thomas model of atom

What happens when a copper wire is dipped in a ferrous sulphate solution?

The pyramid of biomass is inverted for ___ ecosystem.

The IUPAC name of Acetone is:

Which of the following pairs will show displacement reaction?why? a) FeSO4 and copper metal b) FeSO4 and aluminium metal

what are differences between metals and non-metals based on their cghemical properties

A functional isomer of ethanol is

Who prepared ammonia by heating slaked lime with 'sal ammoniac'?

The electronic configuration of four elements are given below. Which element does not belong to same family as others?

Write down the reduction and oxidation half reaction of the reaction Na + F = NaF

Draw structural formula for each of the following compounds : (a) isomer of n-butane, (b) vinegar, (c) 2-propanol (d) ethanal, (e) acetone (f) diethyl ether What is used to describe these compounds taken together ?

Why is NH4OH unstable?

______________ are exchanged or shared during a chemical reaction.

Bee stings can be treated with____________ A) vinegar b) sodium hydrogen carbonate c) potassium hydroxide d) lemon juice

Which properties of carbon make it a versatile element? Discuss its bonding in saturated and unsaturated hydrocarbon.