7248 + Interview Questions in Chemistry Page 24 InterviewSolution

1151.	Define : (a) Elements (b) Compounds
Answer» Define : (a) Elements (b) Compounds

1151.

Define : (a) Elements (b) Compounds

Answer»

Define :

(a) Elements

(b) Compounds

1152.	Identify the type of reaction(s) in the following equations.(i) CH4+2O2→2H2O(ii) Pb(NO3)2+2KI→PbI2+2KNO2(iii) CaO+H2O→Ca(OH)2(iv) CuSO_4+Zn\rightarrow ZnSO_4+Cu\)
Answer» Identify the type of reaction(s) in the following equations. (i) $C H_{4} + 2 O_{2} \to 2 H_{2} O$ (ii) $P b (N O_{3})_{2} + 2 K I \to P b I_{2} + 2 K N O_{2}$ (iii) $C a O + H_{2} O \to C a (O H)_{2}$ (iv) CuSO_4+Zn\rightarrow ZnSO_4+Cu\)

Discussion

1153.	Conversion of frost to water vapour is an example of
Answer» Conversion of frost to water vapour is an example of

Discussion

1154.	Are carbon and hydrogen metals if not then why are they mentioned in the reactive table of the app
Answer» Are carbon and hydrogen metals if not then why are they mentioned in the reactive table of the app

Discussion

1155.	process of oxidation of tertiary alcohol??
Answer» process of oxidation of tertiary alcohol??

Discussion

1156.	Question 34Coal reserves are said to be enough to last for another hundred years. Do you think we need to worry in such case? Why or why not?
Answer» Question 34 Coal reserves are said to be enough to last for another hundred years. Do you think we need to worry in such case? Why or why not?

Discussion

1157.	What is a fuel? On what parameters do we judge whether the fuel is good or not?
Answer» What is a fuel? On what parameters do we judge whether the fuel is good or not?

Discussion

1158.	The standard Gibbs free energy change (in joule) forthe given cell reaction isMg(s) Ni2 (aq) - Mg2 (aq)Ni(s)Given:E Mg /Mg2.36 V; E 2/N = 0.25 V)2+li(1) 5.22 F(2)-6.11 F(3) -2.11 F(4) 4.22 F
Answer» The standard Gibbs free energy change (in joule) forthe given cell reaction isMg(s) Ni2 (aq) - Mg2 (aq)Ni(s)Given:E Mg /Mg2.36 V; E 2/N = 0.25 V)2+li(1) 5.22 F(2)-6.11 F(3) -2.11 F(4) 4.22 F

Discussion

1159.	What is conductivity and conductance?What is its proper definition and what is the difference between resistance and conductance??
Answer» What is conductivity and conductance?What is its proper definition and what is the difference between resistance and conductance??

Discussion

1160.	Solid particles of copper sulphate are prepared by the method of:
Answer» Solid particles of copper sulphate are prepared by the method of:

Discussion

1161.	Identify the monoatomic ions from the given ions
Answer» Identify the monoatomic ions from the given ions

Discussion

1162.	Which of the followings can be considered as matter?Chair, air, love, smell, hate, almond, thought, cold, cold drink, happiness.
Answer» Which of the followings can be considered as matter? Chair, air, love, smell, hate, almond, thought, cold, cold drink, happiness.

Discussion

1163.	Which of the following elements when bonded with halogens form acids?
Answer» Which of the following elements when bonded with halogens form acids?

Discussion

1164.	How do you know that a substance is a metal?
Answer» How do you know that a substance is a metal?

1164.

How do you know that a substance is a metal?

Answer»

How do you know that a substance is a metal?

Discussion

1165.	The pollutants released from oil refineries are:
Answer» The pollutants released from oil refineries are:

Discussion

1166.	What is the valency of phosphorus?
Answer» What is the valency of phosphorus?

Discussion

1167.	Which of the following is a method of preparation of CO2?
Answer» Which of the following is a method of preparation of $C O_{2}$ ?

Discussion

1168.	A satellite gets unstable in its orbit and starts falling towards the earth. It catches fire as soon as it starts falling. If the satellite had a potential energy of 1000 joules initially and by the time it reaches the surface of earth it attains a kinetic energy of 500 joules then how much energy is spent in heating the satellite?
Answer» A satellite gets unstable in its orbit and starts falling towards the earth. It catches fire as soon as it starts falling. If the satellite had a potential energy of 1000 joules initially and by the time it reaches the surface of earth it attains a kinetic energy of 500 joules then how much energy is spent in heating the satellite?

Discussion

1169.	Give the uses of natural gas. [3 MARKS]
Answer» Give the uses of natural gas. [3 MARKS]

Discussion

1170.	Which of the following is/are binary compounds?
Answer» Which of the following is/are binary compounds?

Discussion

1171.	dis†an ce between face centred atom and one corner atom is
Answer» dis†an ce between face centred atom and one corner atom is

Discussion

1172.	An organic compound on analysis gave the following data : C=57.82%, H=3.6% and 38.58% is oxygen Find the empirical formula.
Answer» An organic compound on analysis gave the following data : C=57.82%, H=3.6% and 38.58% is oxygen Find the empirical formula.

Discussion

1173.	Calculate the specific charges (e/m) of the following particles and then arrange the particles in theascending order of their specific charges(a) Electron(b) Proton(c)α -particle
Answer» Calculate the specific charges (e/m) of the following particles and then arrange the particles in theascending order of their specific charges(a) Electron(b) Proton(c)α -particle

Discussion

1174.	How Hydro Power Plant produce methyne?
Answer» How Hydro Power Plant produce methyne?

Discussion

1175.	What is it called when different substances are mixed together?
Answer» What is it called when different substances are mixed together?

Discussion

1176.	In amorphous solids there is no equidistance between their particles but they listed in short range order how
Answer» In amorphous solids there is no equidistance between their particles but they listed in short range order how

Discussion

1177.	the Al-O-Al bond angle in (CF3)2Al-O-Al(CF3)2 is nearly equal to ?
Answer» the Al-O-Al bond angle in (CF3)2Al-O-Al(CF3)2 is nearly equal to ?

Discussion

1178.	Select the correct order for the sequence. A silk fancy frilly golden hued cocktail dress
Answer» Select the correct order for the sequence. A silk fancy frilly golden hued cocktail dress

1178.

Select the correct order for the sequence. A silk fancy frilly golden hued cocktail dress

Answer»

Select the correct order for the sequence.

A silk fancy frilly golden hued cocktail dress

Discussion

1179.	Question 26 Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?(a) Brass(b) Bronze(c) Amalgam(d) Steel
Answer» Question 26 Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents? (a) Brass (b) Bronze (c) Amalgam (d) Steel

Discussion

1180.	Classifythe following fibres as natural or synthetic:Nylon,wool, cotton, silk, polyester, jute
Answer» Classify the following fibres as natural or synthetic: Nylon, wool, cotton, silk, polyester, jute

1180.

Classifythe following fibres as natural or synthetic:Nylon,wool, cotton, silk, polyester, jute

Answer»

Classify
the following fibres as natural or synthetic:

Nylon,
wool, cotton, silk, polyester, jute

Discussion

1181.	Question 23In Fig 4.1 you find that the bulb glows when an iron nail is placed between two ends of the wire. Complete the following sentences on the bases of this fact.(a) __________ is a metal.(b) Metals are good __________ of electricity.
Answer» Question 23 In Fig 4.1 you find that the bulb glows when an iron nail is placed between two ends of the wire. Complete the following sentences on the bases of this fact. (a) __________ is a metal. (b) Metals are good __________ of electricity.

Discussion

1182.	Describe the ‘Green House Effect’ in your own words
Answer» Describe the ‘Green House Effect’ in your own words

Discussion

1183.	All the plastics in the pictures can be deformed. These are _________ plastics.
Answer» All the plastics in the pictures can be deformed. These are _________ plastics.

Discussion

1184.	As we know that candle burns with flame and only those substances burns with flame which are gaseous but which gas candle have candle is solid. And if we said that it is oxygen then oxygen is also given to coals then why not they burn with flame
Answer» As we know that candle burns with flame and only those substances burns with flame which are gaseous but which gas candle have candle is solid. And if we said that it is oxygen then oxygen is also given to coals then why not they burn with flame

Discussion

1185.	The ionic compound formed by the ions Fe3+ and (SO4)2− has the chemical formula ________.
Answer» The ionic compound formed by the ions ${Fe}^{3 +}$ and $({SO}_{4})^{2 -}$ has the chemical formula ________.

Discussion

1186.	Explain the preparation of Bakelite polymers
Answer» Explain the preparation of Bakelite polymers

Discussion

1187.	Silver and gold do not react with oxygen even at a high temperature because they are highly reactive.
Answer» Silver and gold do not react with oxygen even at a high temperature because they are highly reactive.

Discussion

1188.	What does one mean by exothermic and endothermic reactions? Give examples.
Answer» What does one mean by exothermic and endothermic reactions? Give examples.

Discussion

1189.	State one use each of the following products of petroleum : (a) Petroleum gas (b) Petrol (c) Diesel (d) Lubricating oil (e) Bitumen
Answer» State one use each of the following products of petroleum : (a) Petroleum gas (b) Petrol (c) Diesel (d) Lubricating oil (e) Bitumen

1189.

State one use each of the following products of petroleum : (a) Petroleum gas (b) Petrol (c) Diesel (d) Lubricating oil (e) Bitumen

Answer»

State one use each of the following products of petroleum :

(a) Petroleum gas

(b) Petrol

(c) Diesel

(d) Lubricating oil

(e) Bitumen

Discussion

1190.	Why is charcoal brittle?
Answer» Why is charcoal brittle?

Discussion

1191.	Is the action of dissolving of a substance always an endothermic reaction?
Answer» Is the action of dissolving of a substance always an endothermic reaction?

Discussion

1192.	Statements: A few ponds are rivers. All rivers are oceans. Conclusions: I. Some oceans are not ponds is a possibility. II. All ponds being oceans is a possibility.
Answer» Statements: A few ponds are rivers. All rivers are oceans. Conclusions: I. Some oceans are not ponds is a possibility. II. All ponds being oceans is a possibility.

1192.

Statements: A few ponds are rivers. All rivers are oceans. Conclusions: I. Some oceans are not ponds is a possibility. II. All ponds being oceans is a possibility.

Answer»

Statements:

A few ponds are rivers.

All rivers are oceans.

Conclusions:

I. Some oceans are not ponds is a possibility.

II. All ponds being oceans is a possibility.

Discussion

1193.	Non-metals are not good conductors of heat. Hence, they can also be called as:
Answer» Non-metals are not good conductors of heat. Hence, they can also be called as:

Discussion

1194.	Sonali was having a ball made up of steel. She wanted to prevent it from corrosion. So, she decided some of the methods for the prevention of corrosion. Which of the following method cannot be used for the prevention of corrosion?
Answer» Sonali was having a ball made up of steel. She wanted to prevent it from corrosion. So, she decided some of the methods for the prevention of corrosion. Which of the following method cannot be used for the prevention of corrosion?

Discussion

1195.	Which energy resource was first used in street lighting?
Answer» Which energy resource was first used in street lighting?

Discussion

1196.	Question 1 (h)Which separation techniques will you apply for the separation of the following? h. Iron pins from sand.
Answer» Question 1 (h) Which separation techniques will you apply for the separation of the following? h. Iron pins from sand.

Discussion

1197.	What is PET ? State the uses of PET.
Answer» What is PET ? State the uses of PET.

Discussion

1198.	Q43) National Environmental Engineering Research Institute (NEERI) and the Centre for Development of Advanced Computing (C-DAC) have jointly developed an ‘Electronic Nose’. Consider the following statements with reference to this: 1) NEERI works under the Ministry of Environment 2) ‘Electronic Nose’ is used for environmental monitoring that can help sniff out a variety of volatile organic compounds (VOCs) and odorants at a pulp and paper mill industry 3) It uses an array of sensors that function on the principle similar to that of human olfaction. Which of the above statements are correct?
Answer» Q43) National Environmental Engineering Research Institute (NEERI) and the Centre for Development of Advanced Computing (C-DAC) have jointly developed an ‘Electronic Nose’. Consider the following statements with reference to this: 1) NEERI works under the Ministry of Environment 2) ‘Electronic Nose’ is used for environmental monitoring that can help sniff out a variety of volatile organic compounds (VOCs) and odorants at a pulp and paper mill industry 3) It uses an array of sensors that function on the principle similar to that of human olfaction. Which of the above statements are correct?

1198.

Q43) National Environmental Engineering Research Institute (NEERI) and the Centre for Development of Advanced Computing (C-DAC) have jointly developed an ‘Electronic Nose’. Consider the following statements with reference to this: 1) NEERI works under the Ministry of Environment 2) ‘Electronic Nose’ is used for environmental monitoring that can help sniff out a variety of volatile organic compounds (VOCs) and odorants at a pulp and paper mill industry 3) It uses an array of sensors that function on the principle similar to that of human olfaction. Which of the above statements are correct?

Answer»

Q43) National Environmental Engineering Research Institute (NEERI) and the Centre for Development of Advanced Computing (C-DAC) have jointly developed an ‘Electronic Nose’. Consider the following statements with reference to this:

1) NEERI works under the Ministry of Environment

2) ‘Electronic Nose’ is used for environmental monitoring that can help sniff out a variety of volatile organic compounds (VOCs) and odorants at a pulp and paper mill industry

3) It uses an array of sensors that function on the principle similar to that of human olfaction.

Which of the above statements are correct?

Discussion

1199.	What material is chosen for covering electrical wires and for making handles of screw drivers?
Answer» What material is chosen for covering electrical wires and for making handles of screw drivers?

Discussion

1200.	compound that is both paramagnetic and coloured1. K2Cr2O7 2. (NH4)2 [TiCl4]3. VOSO44. K3[Cu(CN)4]
Answer» compound that is both paramagnetic and coloured 1. K2Cr2O7 2. (NH4)2 [TiCl4] 3. VOSO4 4. K3[Cu(CN)4]

Discussion

Explore topic-wise InterviewSolutions in .

Define : (a) Elements (b) Compounds

Identify the type of reaction(s) in the following equations.(i) CH4+2O2→2H2O(ii) Pb(NO3)2+2KI→PbI2+2KNO2(iii) CaO+H2O→Ca(OH)2(iv) CuSO_4+Zn\rightarrow ZnSO_4+Cu\)

Conversion of frost to water vapour is an example of

Are carbon and hydrogen metals if not then why are they mentioned in the reactive table of the app

process of oxidation of tertiary alcohol??

Question 34Coal reserves are said to be enough to last for another hundred years. Do you think we need to worry in such case? Why or why not?

What is a fuel? On what parameters do we judge whether the fuel is good or not?

The standard Gibbs free energy change (in joule) forthe given cell reaction isMg(s) Ni2 (aq) - Mg2 (aq)Ni(s)Given:E Mg /Mg2.36 V; E 2/N = 0.25 V)2+li(1) 5.22 F(2)-6.11 F(3) -2.11 F(4) 4.22 F

What is conductivity and conductance?What is its proper definition and what is the difference between resistance and conductance??

Solid particles of copper sulphate are prepared by the method of:

Identify the monoatomic ions from the given ions

Which of the followings can be considered as matter?Chair, air, love, smell, hate, almond, thought, cold, cold drink, happiness.

Which of the following elements when bonded with halogens form acids?

How do you know that a substance is a metal?

The pollutants released from oil refineries are:

What is the valency of phosphorus?

Which of the following is a method of preparation of CO2?

Give the uses of natural gas. [3 MARKS]

Which of the following is/are binary compounds?

dis†an ce between face centred atom and one corner atom is

An organic compound on analysis gave the following data : C=57.82%, H=3.6% and 38.58% is oxygen Find the empirical formula.

Calculate the specific charges (e/m) of the following particles and then arrange the particles in theascending order of their specific charges(a) Electron(b) Proton(c)α -particle

How Hydro Power Plant produce methyne?

What is it called when different substances are mixed together?

In amorphous solids there is no equidistance between their particles but they listed in short range order how

the Al-O-Al bond angle in (CF3)2Al-O-Al(CF3)2 is nearly equal to ?

Select the correct order for the sequence. A silk fancy frilly golden hued cocktail dress

Question 26 Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?(a) Brass(b) Bronze(c) Amalgam(d) Steel

Classifythe following fibres as natural or synthetic:Nylon,wool, cotton, silk, polyester, jute

Question 23In Fig 4.1 you find that the bulb glows when an iron nail is placed between two ends of the wire. Complete the following sentences on the bases of this fact.(a) __________ is a metal.(b) Metals are good __________ of electricity.

Describe the ‘Green House Effect’ in your own words

All the plastics in the pictures can be deformed. These are _________ plastics.

As we know that candle burns with flame and only those substances burns with flame which are gaseous but which gas candle have candle is solid. And if we said that it is oxygen then oxygen is also given to coals then why not they burn with flame

The ionic compound formed by the ions Fe3+ and (SO4)2− has the chemical formula ________.

Explain the preparation of Bakelite polymers

Silver and gold do not react with oxygen even at a high temperature because they are highly reactive.

What does one mean by exothermic and endothermic reactions? Give examples.

State one use each of the following products of petroleum : (a) Petroleum gas (b) Petrol (c) Diesel (d) Lubricating oil (e) Bitumen

Why is charcoal brittle?

Is the action of dissolving of a substance always an endothermic reaction?

Statements: A few ponds are rivers. All rivers are oceans. Conclusions: I. Some oceans are not ponds is a possibility. II. All ponds being oceans is a possibility.

Non-metals are not good conductors of heat. Hence, they can also be called as:

Sonali was having a ball made up of steel. She wanted to prevent it from corrosion. So, she decided some of the methods for the prevention of corrosion. Which of the following method cannot be used for the prevention of corrosion?

Which energy resource was first used in street lighting?

Question 1 (h)Which separation techniques will you apply for the separation of the following? h. Iron pins from sand.

What is PET ? State the uses of PET.

What material is chosen for covering electrical wires and for making handles of screw drivers?

compound that is both paramagnetic and coloured1. K2Cr2O7 2. (NH4)2 [TiCl4]3. VOSO44. K3[Cu(CN)4]

Question 23In Fig 4.1 you find that the bulb glows when an iron nail is placed between two ends of the wire. Complete the following sentences on the bases of this fact.(a) is a metal.(b) Metals are good of electricity.