15280 + Interview Questions in Chemistry Page 153 InterviewSolution

7601.	What do you understand by the term ‘mole’?
Answer» What do you understand by the term ‘mole’?

Discussion

7602.	Why electromagnetic force is greater than gravitational force in atomic level?
Answer» Why electromagnetic force is greater than gravitational force in atomic level?

Discussion

7603.	Choose the correct option:
Answer» Choose the correct option:

Discussion

7604.	How to find hybridised of mn and cr in mno4)- and cro4)2- respectively?WHAT IS SD3 HYBRIDISATION??
Answer» How to find hybridised of mn and cr in mno4)- and cro4)2- respectively? WHAT IS SD3 HYBRIDISATION??

Discussion

7605.	A compound Z is obtained from sodium chloride which is used in making glass, paper industries and is also used for removing the permanent hardness of water. The molecular formula of compound Z is?
Answer» A compound Z is obtained from sodium chloride which is used in making glass, paper industries and is also used for removing the permanent hardness of water. The molecular formula of compound Z is?

Discussion

7606.	(a) Study the diagram given alongside and answer the questions that follow:(i) Give the names of the electrodes A and B.(ii) Which electrode is oxidizing electrode?(b) A strip of copper is placed in four different colourless salt solutions. They are KNO3, AgNO3, Zn(NO3)2, Ca(NO3)2. Which one of the solutions will finally turn blue?(c) Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolysed.Figure
Answer» (a) Study the diagram given alongside and answer the questions that follow: (i) Give the names of the electrodes A and B. (ii) Which electrode is oxidizing electrode? (b) A strip of copper is placed in four different colourless salt solutions. They are KNO₃, AgNO₃, Zn(NO₃)₂, Ca(NO₃)₂. Which one of the solutions will finally turn blue? (c) Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolysed. Figure

Discussion

7607.	An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:a) Calciumb) Carbonc) Silicond) Iron
Answer» An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be: a) Calcium b) Carbon c) Silicon d) Iron

Discussion

7608.	Question 5 (b)Give the names of the elements present in the following compounds:(b) Hydrogen bromide
Answer» Question 5 (b) Give the names of the elements present in the following compounds: (b) Hydrogen bromide

Discussion

7609.	For the reaction: 2NO(g)+Cl2(g)→2NOCl(g), the mixture containing an equimolar mixture of NO and Cl2 gases at 0.15 atm was half consumed in 175 s. Another experiment, having an initial pressure of 0.35 atm, the mixture was half consumed in 75 s. Find the order of reaction.
Answer» For the reaction: $2 N O (g) + C l_{2} (g) \to 2 N O C l (g)$ , the mixture containing an equimolar mixture of $N O$ and $C l_{2}$ gases at 0.15 $a t m$ was half consumed in 175 s. Another experiment, having an initial pressure of 0.35 atm, the mixture was half consumed in 75 s. Find the order of reaction.

Discussion

7610.	Why a layer of zinc is plated over iron articles?
Answer» Why a layer of zinc is plated over iron articles?

Discussion

7611.	An open U-tube of unifrm cross section contains mercury . When 27.2 cm water is poured into one limb of tube. What is the difference in levels of two sides \lbrack ρ_{water}=1 gm/cm^3 , ρ_{mercury}=13.6 gm/cm^3\rbrack.
Answer» An open U-tube of unifrm cross section contains mercury . When 27.2 cm water is poured into one limb of tube. What is the difference in levels of two sides \lbrack ρ_{water}=1 gm/cm^3 , ρ_{mercury}=13.6 gm/cm^3\rbrack.

Discussion

7612.	7. Formula of charge paricle 8n magnetic field
Answer» 7. Formula of charge paricle 8n magnetic field

Discussion

7613.	how many moles of electron weigh 1 kg?
Answer» how many moles of electron weigh 1 kg?

Discussion

7614.	Solution A reacts with an acid B(which gives greenish yellow gas on reacting with oxidising agents like Pb3O4) to give white precipitate C insoluble in nitric acid but soluble in ammonium hydroxide. Name A, B and C.
Answer» Solution A reacts with an acid B(which gives greenish yellow gas on reacting with oxidising agents like Pb3O4) to give white precipitate C insoluble in nitric acid but soluble in ammonium hydroxide. Name A, B and C.

Discussion

7615.	In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as by product. The gas X reacts with lime water to give a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y giving the chemical equations of the reactions involved.
Answer» In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as by product. The gas X reacts with lime water to give a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y giving the chemical equations of the reactions involved.

Discussion

7616.	What is an oxidizing agent?
Answer» What is an oxidizing agent?

Discussion

7617.	Which of the following salt solution has pH < 7?
Answer» Which of the following salt solution has pH < 7?

Discussion

7618.	Most of the metals are grey in colour; which one of the following is yellow?
Answer» Most of the metals are grey in colour; which one of the following is yellow?

Discussion

7619.	Equivalent ratio of 8:3 is ________.
Answer» Equivalent ratio of 8:3 is ________.

Discussion

7620.	Write balanced equation and name the products formed when:(a) sodium hydrogencarbonate is added to nitric acid.(b) cupric oxide reacts with nitric acid.(c) zinc reacts with dilute nitric acid.(d) concentrated nitric acid is heated.
Answer» Write balanced equation and name the products formed when: (a) sodium hydrogencarbonate is added to nitric acid. (b) cupric oxide reacts with nitric acid. (c) zinc reacts with dilute nitric acid. (d) concentrated nitric acid is heated.

Discussion

7621.	complete the following reaction to predirect the products formed: i. An aqueous solution of lead nitrate is added to sodium sulphate. ii. Zinc sulphate pellets are added to an aqueous solution of hydrocloric acid.
Answer» complete the following reaction to predirect the products formed: i. An aqueous solution of lead nitrate is added to sodium sulphate. ii. Zinc sulphate pellets are added to an aqueous solution of hydrocloric acid.

7621.

complete the following reaction to predirect the products formed: i. An aqueous solution of lead nitrate is added to sodium sulphate. ii. Zinc sulphate pellets are added to an aqueous solution of hydrocloric acid.

Answer»

complete the following reaction to predirect the products formed:

i. An aqueous solution of lead nitrate is added to sodium sulphate.

ii. Zinc sulphate pellets are added to an aqueous solution of hydrocloric acid.

Discussion

7622.	explain what is meant by electrolysis of water write the electrode reaction and explain them
Answer» explain what is meant by electrolysis of water write the electrode reaction and explain them

Discussion

7623.	2. 3 solutions xyz of HCL are mixed to produce 100 ml of .1 molar solution molarities of XYZ are. 07 model. 12 molar and. 15 Mola respectively what respective volumes of XYZ should be mixed 1)10gm 2) 20gm 3) 30gm 4) 40gm
Answer» 2. 3 solutions xyz of HCL are mixed to produce 100 ml of .1 molar solution molarities of XYZ are. 07 model. 12 molar and. 15 Mola respectively what respective volumes of XYZ should be mixed 1)10gm 2) 20gm 3) 30gm 4) 40gm

Discussion

7624.	The development length (in mm, rounded off to the multiple of 5) of a 16 mm diameter plain bar in compression for design bond stress 1.4 N/mm2 is ___.498
Answer» The development length (in mm, rounded off to the multiple of 5) of a 16 mm diameter plain bar in compression for design bond stress $1.4$ $N / m m^{2}$ is ___. 498

Discussion

7625.	The brown ring complex compound is formulated . The oxidation number of iron is
Answer» The brown ring complex compound is formulated . The oxidation number of iron is

Discussion

7626.	The hardness of water is due to the presence of:
Answer» The hardness of water is due to the presence of:

Discussion

7627.	Which of the following oxide is expected to react readily with NaOH ? 1)Na_2O 2)CaO 3)NO 4)Cl_2O_{
Answer» Which of the following oxide is expected to react readily with NaOH ? 1)Na_2O 2)CaO 3)NO 4)Cl_2O_{

Discussion

7628.

During electrolysis of an aqueous solution of sodium sulphate, 2.4 L of oxygen at STP was liberated at anode. The volume of hydrogen at STP, liberated at cathode would be (1) 1.2 L (2) 2.4 L (3) 2.6 L (4) 4.8 L

Answer»

During electrolysis of an aqueous solution of sodium sulphate, 2.4 L of oxygen at STP was liberated at anode. The volume of hydrogen at STP, liberated at cathode would be

(1)	1.2 L
(2)	2.4 L
(3)	2.6 L
(4)	4.8 L

Discussion

7629.	Give reasons(a) Platinum, gold and silver are used to make jewellery.(b) Sodium, potassium and lithium are stored under oil.(c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Answer» Give reasons (a) Platinum, gold and silver are used to make jewellery. (b) Sodium, potassium and lithium are stored under oil. (c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking. (d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

7629.

Give reasons(a) Platinum, gold and silver are used to make jewellery.(b) Sodium, potassium and lithium are stored under oil.(c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

Answer»

Give reasons

(a) Platinum, gold and silver are used to make jewellery.

(b) Sodium, potassium and lithium are stored under oil.

(c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.

(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

Discussion

7630.	Which of the following polar solvents has the highest dielectric cons†an t?:-(1) H_2O, (2) D_2O, (3) CH_3OH, (4) C_2H_5OH
Answer» Which of the following polar solvents has the highest dielectric cons†an t?:-(1) H_2O, (2) D_2O, (3) CH_3OH, (4) C_2H_5OH

Discussion

7631.	What is the major constituent of biomass?
Answer» What is the major constituent of biomass?

Discussion

7632.	When NaOH reacts with metal a X, the following reaction takes place: NaOH+X→Na2ZnO2+Y Identify X and Y.
Answer» When NaOH reacts with metal a X, the following reaction takes place: $N a O H + X \to N a_{2} Z n O_{2} + Y$ Identify X and Y.

7632.

When NaOH reacts with metal a X, the following reaction takes place: NaOH+X→Na2ZnO2+Y Identify X and Y.

Answer»

When NaOH reacts with metal a X, the following reaction takes place:

$N a O H + X \to N a_{2} Z n O_{2} + Y$

Identify X and Y.

Discussion

7633.	In the module of chapter-Metals and Non Metals,you have explained the case of lithium metal,at the atomic level,that why it is so reactive (because there are 3 protons attracting the Valence electron, and 2 electrons in the k-shell repelling the valence electron, thats why the net resultant force is less) So can you please explain me the case of Sodium and calcium that why less energy is required to kick out valence electrons,like you have explained in the case of litium i.e at the Atomic level
Answer» In the module of chapter-Metals and Non Metals,you have explained the case of lithium metal,at the atomic level,that why it is so reactive (because there are 3 protons attracting the Valence electron, and 2 electrons in the k-shell repelling the valence electron, thats why the net resultant force is less) So can you please explain me the case of Sodium and calcium that why less energy is required to kick out valence electrons,like you have explained in the case of litium i.e at the Atomic level

Discussion

7634.	Name 2 mwpetalsa that can be used to reduce metal oxides to metals
Answer» Name 2 mwpetalsa that can be used to reduce metal oxides to metals

Discussion

7635.	Select the correct answer:(i) Which of the following electronic structures is of a metal?(a) 2, 8, 8(b) 2,7(c) 2, 8, 2(d) 2, 8, 4(ii) Atomic radii of fluorine and neon in angstrom unit are(a) 0.72, 13.6(b) 1.60, 1.60(c) 0.72, 0.72(d) none of these(iii) Configuration of an element is 2, 8, 1. Which of the following statement is true?(a) Valency of element is 7(b) Element is diatomic(c) Element is non-metal(d) Element forms basic oxide(iv) Which of the following element has highest electronegativity?(a) F(b) H(c) Ne(d) Na
Answer» Select the correct answer: (i) Which of the following electronic structures is of a metal? (a) 2, 8, 8 (b) 2,7 (c) 2, 8, 2 (d) 2, 8, 4 (ii) Atomic radii of fluorine and neon in angstrom unit are (a) 0.72, 13.6 (b) 1.60, 1.60 (c) 0.72, 0.72 (d) none of these (iii) Configuration of an element is 2, 8, 1. Which of the following statement is true? (a) Valency of element is 7 (b) Element is diatomic (c) Element is non-metal (d) Element forms basic oxide (iv) Which of the following element has highest electronegativity? (a) F (b) H (c) Ne (d) Na

Discussion

7636.	In the upper atmosphere ___ gets converted to ozone.
Answer» In the upper atmosphere ___ gets converted to ozone.

Discussion

7637.	The sodium metal can be stored in:
Answer» The sodium metal can be stored in:

Discussion

7638.	calculate number of atoms present in 11.2 L ammonia at 273 degrees celsius and 2 atm. a:6.02310^(23)b:26.02310^(23)c:0.56.023*10^(23)
Answer» calculate number of atoms present in 11.2 L ammonia at 273 degrees celsius and 2 atm. a:6.02310^(23) b:26.02310^(23) c:0.56.023*10^(23)

Discussion

7639.	The molar mass of carbon dioxide is 44 g. The number of molecules present in 176 g of carbon dioxide is a×1024. Find the value of a.2.41
Answer» The molar mass of carbon dioxide is 44 g. The number of molecules present in 176 g of carbon dioxide is $a \times 10^{24}$ . Find the value of a. 2.41

Discussion

7640.	what is the quick steps to get maximum number of molecules among following 15L of H2 gas at STP 5L of N2 gas at STP 0.5gm of H2 gas 10gm of O2 gas
Answer» what is the quick steps to get maximum number of molecules among following <1>15L of H2 gas at STP <2> 5L of N2 gas at STP <3>0.5gm of H2 gas <4>10gm of O2 gas

Discussion

7641.	The reaction in which a chlorine atom replaces a hydrogen atom in a molecule of methane is called ______________.
Answer» The reaction in which a chlorine atom replaces a hydrogen atom in a molecule of methane is called ______________.

Discussion

7642.	Find limiting reagent when 12 gm of magnesium is reacted with 32 gm of oxygen to formed magnesium oxide.2Mg + O² -->2 MgO12gm. 32gm
Answer» Find limiting reagent when 12 gm of magnesium is reacted with 32 gm of oxygen to formed magnesium oxide. 2Mg + O² -->2 MgO 12gm. 32gm

Discussion

7643.	31. 0.1gram of nitrogenous compound use 6ml of 0.1M H2So4 for complete neutralization of NH3 in Kjeldahl method.The % of nitrogen in organic compound is
Answer» 31. 0.1gram of nitrogenous compound use 6ml of 0.1M H2So4 for complete neutralization of NH3 in Kjeldahl method.The % of nitrogen in organic compound is

Discussion

7644.	Write the name and formulae of two ores for each of the following:(a) iron(b) zinc(c) aluminium
Answer» Write the name and formulae of two ores for each of the following: (a) iron (b) zinc (c) aluminium

Discussion

7645.	34) Consider the tollowing cell reaction:2Fe (s) 02(g) + 4H (aq) 2Fe (aq) +2H20 (1); E^° 1.67VAt \lbrack Fe21 103 M, p(02) 0.1 atm and pH -3,the cell potential at 25 C isa) 1.47 V b) 1.77 V c) 1.87V d)1.57 V
Answer» 34) Consider the tollowing cell reaction:2Fe (s) 02(g) + 4H (aq) 2Fe (aq) +2H20 (1); E^° 1.67VAt \lbrack Fe21 103 M, p(02) 0.1 atm and pH -3,the cell potential at 25 C isa) 1.47 V b) 1.77 V c) 1.87V d)1.57 V

Discussion

7646.	(a) Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2.(i) Which solution will liberate ammonia from ammonium sulphate on heating?(ii) Which solution is a strong acid?(iii) Which solution contains solute molecules as well as ions?
Answer» (a) Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2. (i) Which solution will liberate ammonia from ammonium sulphate on heating? (ii) Which solution is a strong acid? (iii) Which solution contains solute molecules as well as ions?

Discussion

7647.	What is the isomorphism in electrovalent compound?
Answer» What is the isomorphism in electrovalent compound?

Discussion

7648.	What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light. Why is it essential that the two prisms used for this purpose should be identical and placed in an inverted position with respect to each other?
Answer» What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light. Why is it essential that the two prisms used for this purpose should be identical and placed in an inverted position with respect to each other?

Discussion

7649.	Which among the following formulae of elements was used by Mendeleev for giving the classification?
Answer» Which among the following formulae of elements was used by Mendeleev for giving the classification?

Discussion

7650.	Ethyl alcohol on oxidation with acidified K2Cr2O7 gives
Answer» Ethyl alcohol on oxidation with acidified $K_{2} C r_{2} O_{7}$ gives

Discussion

Explore topic-wise InterviewSolutions in .

What do you understand by the term ‘mole’?

Why electromagnetic force is greater than gravitational force in atomic level?

Choose the correct option:

How to find hybridised of mn and cr in mno4)- and cro4)2- respectively?WHAT IS SD3 HYBRIDISATION??

A compound Z is obtained from sodium chloride which is used in making glass, paper industries and is also used for removing the permanent hardness of water. The molecular formula of compound Z is?

An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:a) Calciumb) Carbonc) Silicond) Iron

Question 5 (b)Give the names of the elements present in the following compounds:(b) Hydrogen bromide

For the reaction: 2NO(g)+Cl2(g)→2NOCl(g), the mixture containing an equimolar mixture of NO and Cl2 gases at 0.15 atm was half consumed in 175 s. Another experiment, having an initial pressure of 0.35 atm, the mixture was half consumed in 75 s. Find the order of reaction.

Why a layer of zinc is plated over iron articles?

An open U-tube of unifrm cross section contains mercury . When 27.2 cm water is poured into one limb of tube. What is the difference in levels of two sides \lbrack ρ_{water}=1 gm/cm^3 , ρ_{mercury}=13.6 gm/cm^3\rbrack.

7. Formula of charge paricle 8n magnetic field

how many moles of electron weigh 1 kg?

Solution A reacts with an acid B(which gives greenish yellow gas on reacting with oxidising agents like Pb3O4) to give white precipitate C insoluble in nitric acid but soluble in ammonium hydroxide. Name A, B and C.

In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as by product. The gas X reacts with lime water to give a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y giving the chemical equations of the reactions involved​.

What is an oxidizing agent?

Which of the following salt solution has pH &lt; 7?

Most of the metals are grey in colour; which one of the following is yellow?

Equivalent ratio of 8:3 is ________.

Write balanced equation and name the products formed when:(a) sodium hydrogencarbonate is added to nitric acid.(b) cupric oxide reacts with nitric acid.(c) zinc reacts with dilute nitric acid.(d) concentrated nitric acid is heated.

complete the following reaction to predirect the products formed: i. An aqueous solution of lead nitrate is added to sodium sulphate. ii. Zinc sulphate pellets are added to an aqueous solution of hydrocloric acid.

explain what is meant by electrolysis of water write the electrode reaction and explain them

2. 3 solutions xyz of HCL are mixed to produce 100 ml of .1 molar solution molarities of XYZ are. 07 model. 12 molar and. 15 Mola respectively what respective volumes of XYZ should be mixed 1)10gm 2) 20gm 3) 30gm 4) 40gm

The development length (in mm, rounded off to the multiple of 5) of a 16 mm diameter plain bar in compression for design bond stress 1.4 N/mm2 is ___.498

The brown ring complex compound is formulated . The oxidation number of iron is

The hardness of water is due to the presence of:

Which of the following oxide is expected to react readily with NaOH ? 1)Na_2O 2)CaO 3)NO 4)Cl_2O_{

During electrolysis of an aqueous solution of sodium sulphate, 2.4 L of oxygen at STP was liberated at anode. The volume of hydrogen at STP, liberated at cathode would be (1) 1.2 L (2) 2.4 L (3) 2.6 L (4) 4.8 L

Which of the following polar solvents has the highest dielectric cons†an t?:-(1) H_2O, (2) D_2O, (3) CH_3OH, (4) C_2H_5OH

What is the major constituent of biomass?

When NaOH reacts with metal a X, the following reaction takes place: NaOH+X→Na2ZnO2+Y Identify X and Y.

Name 2 mwpetalsa that can be used to reduce metal oxides to metals

In the upper atmosphere ___ gets converted to ozone.

The sodium metal can be stored in:

calculate number of atoms present in 11.2 L ammonia at 273 degrees celsius and 2 atm. a:6.023*10^(23)b:2*6.023*10^(23)c:0.5*6.023*10^(23)

The molar mass of carbon dioxide is 44 g. The number of molecules present in 176 g of carbon dioxide is a×1024. Find the value of a.2.41

what is the quick steps to get maximum number of molecules among following 15L of H2 gas at STP 5L of N2 gas at STP 0.5gm of H2 gas 10gm of O2 gas

The reaction in which a chlorine atom replaces a hydrogen atom in a molecule of methane is called ______________.

Find limiting reagent when 12 gm of magnesium is reacted with 32 gm of oxygen to formed magnesium oxide.2Mg + O² -->2 MgO12gm. 32gm

31. 0.1gram of nitrogenous compound use 6ml of 0.1M H2So4 for complete neutralization of NH3 in Kjeldahl method.The % of nitrogen in organic compound is

Write the name and formulae of two ores for each of the following:(a) iron(b) zinc(c) aluminium

34) Consider the tollowing cell reaction:2Fe (s) 02(g) + 4H (aq) 2Fe (aq) +2H20 (1); E^° 1.67VAt \lbrack Fe21 103 M, p(02) 0.1 atm and pH -3,the cell potential at 25 C isa) 1.47 V b) 1.77 V c) 1.87V d)1.57 V

(a) Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2.(i) Which solution will liberate ammonia from ammonium sulphate on heating?(ii) Which solution is a strong acid?(iii) Which solution contains solute molecules as well as ions?

What is the isomorphism in electrovalent compound?

What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light. Why is it essential that the two prisms used for this purpose should be identical and placed in an inverted position with respect to each other?

Which among the following formulae of elements was used by Mendeleev for giving the classification?

Ethyl alcohol on oxidation with acidified K2Cr2O7 gives

In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as by product. The gas X reacts with lime water to give a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y giving the chemical equations of the reactions involved.

Which of the following salt solution has pH < 7?

calculate number of atoms present in 11.2 L ammonia at 273 degrees celsius and 2 atm. a:6.02310^(23)b:26.02310^(23)c:0.56.023*10^(23)