15280 + Interview Questions in Chemistry Page 268 InterviewSolution

13351.	In which of the following pair, displacement reaction will be seen:
Answer» In which of the following pair, displacement reaction will be seen:

Discussion

13352.	The electronic configurations of four particles A, B, C and D are given below: A2,8,8B2,8,2C2,6D2,8 (i) magniesium atom? (i) oxygen atom? (iii) sodium ion? (iv) chloride ion?
Answer» The electronic configurations of four particles A, B, C and D are given below: $\begin{matrix} A & 2, 8, 8 B & 2, 8, 2 C & 2, 6 D & 2, 8 \end{matrix}$ (i) magniesium atom? (i) oxygen atom? (iii) sodium ion? (iv) chloride ion?

Discussion

13353.	If a hydrocarbon has 5 carbon skeletal and there is a double bond between the 2nd and the 3rd carbon, what is it named as?
Answer» If a hydrocarbon has 5 carbon skeletal and there is a double bond between the $2^{n d}$ and the $3^{r d}$ carbon, what is it named as?

Discussion

13354.	Which of the following cannot be an isomer of pentane?
Answer» Which of the following cannot be an isomer of pentane?

Discussion

13355.	What is the major characteristic of the first element in the periods of the periodic table? What is the general name of such elements?
Answer» What is the major characteristic of the first element in the periods of the periodic table? What is the general name of such elements?

Discussion

13356.	Sarath observed a reaction between aluminium and sulphuric acid. He weighed the contents of the flask before perfoming the experiment. The weight of the flask was X g. The reaction took place forming products, aluminium sulphide and hydrogen gas. He weighed the flask after the reaction and found it to be Y g (which is less than X g). Sarath conculded that the law of conservation is not valid. Choose the correct answer among the following options:
Answer» Sarath observed a reaction between aluminium and sulphuric acid. He weighed the contents of the flask before perfoming the experiment. The weight of the flask was X g. The reaction took place forming products, aluminium sulphide and hydrogen gas. He weighed the flask after the reaction and found it to be Y g (which is less than X g). Sarath conculded that the law of conservation is not valid. Choose the correct answer among the following options:

Discussion

13357.	Write the names of : (a) first three members of carboxylic acid series. (b) three compounds which can be oxidised directly, or in stages to produce acetic acid.
Answer» Write the names of : (a) first three members of carboxylic acid series. (b) three compounds which can be oxidised directly, or in stages to produce acetic acid.

Discussion

13358.	Every household produces a lot of material A daily. In one of the methods of disposal B, material A is burned at a very high temperature of about 1000o C in a structure called C. During this process, the organic matter present is removed as D and E whereas F is left behind (which can be dumped in a landfill site). (a) What is material A? (b) Name the method of disposal B. (c) What is structure C known as? (d) What are (i) D (ii) E, and (iii) F? (e) This method is especially suitable for the disposal of material produced by certain institutions. Name such institutions.
Answer» Every household produces a lot of material A daily. In one of the methods of disposal B, material A is burned at a very high temperature of about $1000^{o}$ C in a structure called C. During this process, the organic matter present is removed as D and E whereas F is left behind (which can be dumped in a landfill site). (a) What is material A? (b) Name the method of disposal B. (c) What is structure C known as? (d) What are (i) D (ii) E, and (iii) F? (e) This method is especially suitable for the disposal of material produced by certain institutions. Name such institutions.

13358.

Every household produces a lot of material A daily. In one of the methods of disposal B, material A is burned at a very high temperature of about 1000o C in a structure called C. During this process, the organic matter present is removed as D and E whereas F is left behind (which can be dumped in a landfill site). (a) What is material A? (b) Name the method of disposal B. (c) What is structure C known as? (d) What are (i) D (ii) E, and (iii) F? (e) This method is especially suitable for the disposal of material produced by certain institutions. Name such institutions.

Answer»

Every household produces a lot of material A daily. In one of the methods of disposal B, material A is burned at a very high temperature of about $1000^{o}$ C in a structure called C. During this process, the organic matter present is removed as D and E whereas F is left behind (which can be dumped in a landfill site).

(a) What is material A?

(b) Name the method of disposal B.

(c) What is structure C known as?

(d) What are (i) D (ii) E, and (iii) F?

(e) This method is especially suitable for the disposal of material produced by certain institutions. Name such institutions.

Discussion

13359.	What will happen if a strip of zinc is immersed in a solution of copper sulphate?
Answer» What will happen if a strip of zinc is immersed in a solution of copper sulphate?

Discussion

13360.	CH3−CCH+HCl→
Answer» $C H_{3} - C C H + H C l \to$

Discussion

13361.	Which of the following factors promote corrosion?
Answer» Which of the following factors promote corrosion?

Discussion

13362.	Tungsten do not oxidize at high temperature. Can it be the reason for tungsten used almost exclusively for filament of electric lamps?
Answer» Tungsten do not oxidize at high temperature. Can it be the reason for tungsten used almost exclusively for filament of electric lamps?

Discussion

13363.	Can the balancing of an element be less than 1 for a balanced chemical equation.
Answer» Can the balancing of an element be less than 1 for a balanced chemical equation.

Discussion

13364.	The smallest alkali metal is
Answer» The smallest alkali metal is

Discussion

13365.	STATE WHICH OF THE FOLLOWING METHODS IS GENERALLY USED FOR PREPARATION OF THE SALTS 1-5 GIVEN BELOW: A. Neutralisation (insoluble base and dilute acid) B. Neutralisation (Alkali and dilute acid) C. Simple displacement (active metal and dilute acid) D. Direct combination E. Precipitation (double decomposition) 1. PbCO3 2. Zn(NO3)2 3. NaCl 4. Cu(NO3)2 5. FeS
Answer» STATE WHICH OF THE FOLLOWING METHODS IS GENERALLY USED FOR PREPARATION OF THE SALTS 1-5 GIVEN BELOW: A. Neutralisation (insoluble base and dilute acid) B. Neutralisation (Alkali and dilute acid) C. Simple displacement (active metal and dilute acid) D. Direct combination E. Precipitation (double decomposition) 1. PbCO₃ 2. Zn(NO₃)₂ 3. NaCl 4. Cu(NO₃)₂ 5. FeS

Discussion

13366.	An element X has mass number 35 and the number of neutrons is 18. Identify the group number and period of X.
Answer» An element X has mass number 35 and the number of neutrons is 18. Identify the group number and period of X.

Discussion

13367.	How does reactivity change as move along a period or fowd a group. Does it depend on whether the element is metal or a non metal?
Answer» How does reactivity change as move along a period or fowd a group. Does it depend on whether the element is metal or a non metal?

Discussion

13368.	A synthetic toxic chemical with ecological repercussions is:
Answer» A synthetic toxic chemical with ecological repercussions is:

Discussion

13369.	How do we distinguish pure fuel (alkanes) from fuel having impurities?
Answer» How do we distinguish pure fuel (alkanes) from fuel having impurities?

Discussion

13370.	Which of the following is not the characteristic of bio-degradable substance?
Answer» Which of the following is not the characteristic of bio-degradable substance?

Discussion

13371.	Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9?
Answer» Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9?

Discussion

13372.	The methods chiefly used for the extraction of lead and tin from their ores are respectively:
Answer» The methods chiefly used for the extraction of lead and tin from their ores are respectively:

Discussion

13373.	Where can we find the use of HCl?
Answer» Where can we find the use of HCl?

Discussion

13374.	Statement 1: Carbon always shares electrons or forms a covalent bond with other elements. Statement 2:C+4 and C−4 ions are highly unstable.
Answer» Statement 1: Carbon always shares electrons or forms a covalent bond with other elements. Statement 2: $C^{+ 4}$ and $C^{- 4}$ ions are highly unstable.

13374.

Statement 1: Carbon always shares electrons or forms a covalent bond with other elements. Statement 2:C+4 and C−4 ions are highly unstable.

Answer»

Statement 1: Carbon always shares electrons or forms a covalent bond with other elements.

Statement 2: $C^{+ 4}$ and $C^{- 4}$ ions are highly unstable.

Discussion

13375.	Complete and balance the following equations : (a) H2+⋅⋅⋅⋅⋅⋅⋅⋅→ 2HCl (b) H2+S→ ⋅⋅⋅⋅⋅⋅⋅⋅ (c) Zn+⋅⋅⋅⋅⋅⋅⋅⋅→ ZnCl2+H2 (d) Cuo+⋅⋅⋅⋅⋅⋅⋅⋅→ Cu+⋅⋅⋅⋅⋅⋅⋅⋅ (e) Fe+H2O →+⋅⋅⋅⋅⋅⋅⋅⋅ (f) K+H2O → ⋅⋅⋅⋅⋅⋅⋅⋅+⋅⋅⋅⋅⋅⋅⋅⋅
Answer» Complete and balance the following equations : (a) $H_{2} + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot \to 2 H C l$ (b) $H_{2} + S \to \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$ (c) $Z n + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot \to Z n C l_{2} + H_{2}$ (d) $C u o + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot \to C u + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$ (e) $F e + H_{2} O \to + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$ (f) $K + H_{2} O \to \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$

13375.

Complete and balance the following equations : (a) H2+⋅⋅⋅⋅⋅⋅⋅⋅→ 2HCl (b) H2+S→ ⋅⋅⋅⋅⋅⋅⋅⋅ (c) Zn+⋅⋅⋅⋅⋅⋅⋅⋅→ ZnCl2+H2 (d) Cuo+⋅⋅⋅⋅⋅⋅⋅⋅→ Cu+⋅⋅⋅⋅⋅⋅⋅⋅ (e) Fe+H2O →+⋅⋅⋅⋅⋅⋅⋅⋅ (f) K+H2O → ⋅⋅⋅⋅⋅⋅⋅⋅+⋅⋅⋅⋅⋅⋅⋅⋅

Answer»

Complete and balance the following equations :

(a) $H_{2} + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot \to 2 H C l$

(b) $H_{2} + S \to \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$

(c) $Z n + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot \to Z n C l_{2} + H_{2}$

(d) $C u o + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot \to C u + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$

(e) $F e + H_{2} O \to + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$

(f) $K + H_{2} O \to \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot + \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot$

Discussion

13376.	The metal which exists as a liquid at room temperature is ___.
Answer» The metal which exists as a liquid at room temperature is ___.

Discussion

13377.	A list of species having the formula XZ4 is given below. XeF4,SF4,SiF4,BF⊖4,[Cu(NH3)4]2+,[FeCl4]2−,[CoCl4]2−and[PtCl4]2−. Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is___. (IIT-JEE Advaced, 2014)
Answer» A list of species having the formula $X Z_{4}$ is given below. $X e F_{4}, S F_{4}, S i F_{4}, B F_{4}^{⊖}, [C u (N H_{3})_{4}]^{2 +}, [F e C l_{4}]^{2 -}, [C o C l_{4}]^{2 -} a n d [P t C l_{4}]^{2 -} .$ Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is___. (IIT-JEE Advaced, 2014)

Discussion

13378.	Name the acid which is present in tamarind juice?
Answer» Name the acid which is present in tamarind juice?

Discussion

13379.	In the periodic table of the elements in a period from left to right atomic radius increases or decreases?
Answer» In the periodic table of the elements in a period from left to right atomic radius increases or decreases?

Discussion

13380.	What should be the pH of pure water?
Answer» What should be the pH of pure water?

Discussion

13381.	In the given arrangement, where will we collect pure copper?
Answer» In the given arrangement, where will we collect pure copper?

13381.

In the given arrangement, where will we collect pure copper?

Answer»

In the given arrangement, where will we collect pure copper?

Discussion

13382.	What happens when silver chloride is exposed to sunlight ? Write a chemical equation for this reaction. Also give one use of such a reaction.
Answer» What happens when silver chloride is exposed to sunlight ? Write a chemical equation for this reaction. Also give one use of such a reaction.

Discussion

13383.	What type of chemical reaction is used to extract metals from their naturally occurring compounds like oxides or chlorides ?
Answer» What type of chemical reaction is used to extract metals from their naturally occurring compounds like oxides or chlorides ?

Discussion

13384.	The process of refining, where the anode is an impure metal and the cathode is a pure metal is called ___.
Answer» The process of refining, where the anode is an impure metal and the cathode is a pure metal is called ___.

Discussion

13385.	The internal combustion engine that doesn't use a spark plug is called ___.
Answer» The internal combustion engine that doesn't use a spark plug is called ___.

Discussion

13386.	Which of the following is an example of an amphoteric oxide?
Answer» Which of the following is an example of an amphoteric oxide?

Discussion

13387.	Do bases conduct electricity
Answer» Do bases conduct electricity

Discussion

13388.	do all chemical reactions take place in aqueous form
Answer» do all chemical reactions take place in aqueous form

Discussion

13389.	CH3COC4H10 Name the compound
Answer» CH3COC4H10 Name the compound

13389.

CH3COC4H10 Name the compound

Answer»

CH3COC4H10

Name the compound

Discussion

13390.	(a) Explain with the help of a balanced equation, the brown ring test for nitric acid. (b) Why is freshly pepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test ?
Answer» (a) Explain with the help of a balanced equation, the brown ring test for nitric acid. (b) Why is freshly pepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test ?

13390.

(a) Explain with the help of a balanced equation, the brown ring test for nitric acid. (b) Why is freshly pepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test ?

Answer»

(a) Explain with the help of a balanced equation, the brown ring test for nitric acid.

(b) Why is freshly pepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test ?

Discussion

13391.	Which of these do not reflect the periodicity of the elements?
Answer» Which of these do not reflect the periodicity of the elements?

Discussion

13392.	If hydrogen burns in air to produce oxygen, why a rocket which contains hydrogen as fuel produces smoke during its launch?
Answer» If hydrogen burns in air to produce oxygen, why a rocket which contains hydrogen as fuel produces smoke during its launch?

Discussion

13393.	Which of the following is the chemical formula for muriatic acid?
Answer» Which of the following is the chemical formula for muriatic acid?

Discussion

13394.	__ analysis deals with the identification of unknown substance in a given sample by chemical tests.
Answer» __ analysis deals with the identification of unknown substance in a given sample by chemical tests.

Discussion

13395.	Identify the line structure of the compound below. CH3−CH=CH−C≡CH
Answer» Identify the line structure of the compound below. ${CH}_{3} - CH = CH - C \equiv CH$

Discussion

13396.	Name the cathode and anode in the electrorefining of copper. [2 MARKS]
Answer» Name the cathode and anode in the electrorefining of copper. [2 MARKS]

Discussion

13397.	Fill in the blanks. (a) Hydrogen is ___ than air. (b) Hydrogen is ___ soluble in water. (c) Hydrogen burns with a ___ flame and ___ sound is heard. (d) A Metal ___ hydrogen in the reactivity series gives hydrogen with ___ (e) Hydrogen reacts with metal oxides to form ___ and ___ (f) Oxidation is the removal of ___ or addition of ___ (g) In redox reactions oxidation and reduction occur ___
Answer» Fill in the blanks. (a) Hydrogen is ___ than air. (b) Hydrogen is ___ soluble in water. (c) Hydrogen burns with a ___ flame and ___ sound is heard. (d) A Metal ___ hydrogen in the reactivity series gives hydrogen with ___ (e) Hydrogen reacts with metal oxides to form ___ and ___ (f) Oxidation is the removal of ___ or addition of ___ (g) In redox reactions oxidation and reduction occur ___

13397.

Fill in the blanks. (a) Hydrogen is _ than air. (b) Hydrogen is _ soluble in water. (c) Hydrogen burns with a _ flame and _ sound is heard. (d) A Metal _ hydrogen in the reactivity series gives hydrogen with _ (e) Hydrogen reacts with metal oxides to form _ and _ (f) Oxidation is the removal of _ or addition of _ (g) In redox reactions oxidation and reduction occur ___

Answer»

Fill in the blanks.

(a) Hydrogen is ___ than air.

(b) Hydrogen is ___ soluble in water.

(c) Hydrogen burns with a ___ flame and ___ sound is heard.

(d) A Metal ___ hydrogen in the reactivity series gives hydrogen with ___

(e) Hydrogen reacts with metal oxides to form ___ and ___

(f) Oxidation is the removal of ___ or addition of ___

(g) In redox reactions oxidation and reduction occur ___

Discussion

13398.	(a) What are the usual number of valence electrons and valency of group 18 elements of the periodic table? (b) What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
Answer» (a) What are the usual number of valence electrons and valency of group 18 elements of the periodic table? (b) What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?

13398.

(a) What are the usual number of valence electrons and valency of group 18 elements of the periodic table? (b) What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?

Answer»

(a) What are the usual number of valence electrons and valency of group 18 elements of the periodic table?

(b) What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?

Discussion

13399.	The conjugate acid of NH3 is :
Answer» The conjugate acid of $N H_{3}$ is :

Discussion

13400.	A compound HA when react with S, it dissociates as shown below: HA+S⇌ A− + SH+ What is S and A?
Answer» A compound HA when react with S, it dissociates as shown below: $H A + S ⇌$ $A^{-}$ + $S H^{+}$ What is S and A?

13400.

A compound HA when react with S, it dissociates as shown below: HA+S⇌ A− + SH+ What is S and A?

Answer»

A compound HA when react with S, it dissociates as shown below:

$H A + S ⇌$ $A^{-}$ + $S H^{+}$

What is S and A?

Discussion

Explore topic-wise InterviewSolutions in .

In which of the following pair, displacement reaction will be seen:

The electronic configurations of four particles A, B, C and D are given below: A2,8,8B2,8,2C2,6D2,8 (i) magniesium atom? (i) oxygen atom? (iii) sodium ion? (iv) chloride ion?

If a hydrocarbon has 5 carbon skeletal and there is a double bond between the 2nd and the 3rd carbon, what is it named as?

Which of the following cannot be an isomer of pentane?

What is the major characteristic of the first element in the periods of the periodic table? What is the general name of such elements?

Write the names of : (a) first three members of carboxylic acid series. (b) three compounds which can be oxidised directly, or in stages to produce acetic acid.

What will happen if a strip of zinc is immersed in a solution of copper sulphate?

CH3−CCH+HCl→

Which of the following factors promote corrosion?

Tungsten do not oxidize at high temperature. Can it be the reason for tungsten used almost exclusively for filament of electric lamps?

Can the balancing of an element be less than 1 for a balanced chemical equation.

The smallest alkali metal is

An element X has mass number 35 and the number of neutrons is 18. Identify the group number and period of X.

How does reactivity change as move along a period or fowd a group. Does it depend on whether the element is metal or a non metal?

A synthetic toxic chemical with ecological repercussions is:

How do we distinguish pure fuel (alkanes) from fuel having impurities?

Which of the following is not the characteristic of bio-degradable substance?

Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9?

The methods chiefly used for the extraction of lead and tin from their ores are respectively:

Where can we find the use of HCl?

Statement 1: Carbon always shares electrons or forms a covalent bond with other elements. Statement 2:C+4 and C−4 ions are highly unstable.

The metal which exists as a liquid at room temperature is ___.

A list of species having the formula XZ4 is given below. XeF4,SF4,SiF4,BF⊖4,[Cu(NH3)4]2+,[FeCl4]2−,[CoCl4]2−and[PtCl4]2−. Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is___. (IIT-JEE Advaced, 2014)

Name the acid which is present in tamarind juice?

In the periodic table of the elements in a period from left to right atomic radius increases or decreases?

What should be the pH of pure water?

In the given arrangement, where will we collect pure copper?

What happens when silver chloride is exposed to sunlight ? Write a chemical equation for this reaction. Also give one use of such a reaction.

What type of chemical reaction is used to extract metals from their naturally occurring compounds like oxides or chlorides ?

The process of refining, where the anode is an impure metal and the cathode is a pure metal is called ___.

The internal combustion engine that doesn't use a spark plug is called ___.

Which of the following is an example of an amphoteric oxide?

Do bases conduct electricity

do all chemical reactions take place in aqueous form

CH3COC4H10 Name the compound

(a) Explain with the help of a balanced equation, the brown ring test for nitric acid. (b) Why is freshly pepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test ?

Which of these do not reflect the periodicity of the elements?

If hydrogen burns in air to produce oxygen, why a rocket which contains hydrogen as fuel produces smoke during its launch?

Which of the following is the chemical formula for muriatic acid?

__ analysis deals with the identification of unknown substance in a given sample by chemical tests.

Identify the line structure of the compound below. CH3−CH=CH−C≡CH

Name the cathode and anode in the electrorefining of copper. [2 MARKS]

(a) What are the usual number of valence electrons and valency of group 18 elements of the periodic table? (b) What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?

The conjugate acid of NH3 is :

A compound HA when react with S, it dissociates as shown below: HA+S⇌ A− + SH+ What is S and A?