5083 + Interview Questions in Chemistry Page 20 InterviewSolution

951.	What is stainless steel alloy consist of?
Answer» What is stainless steel alloy consist of?

Discussion

952.	A neutron makes a head on elastic collision with a stationary deutron. the fractional energy loss of the neutron in collision is 16/81 8/9 8/27 2/3
Answer» A neutron makes a head on elastic collision with a stationary deutron. the fractional energy loss of the neutron in collision is 16/81 8/9 8/27 2/3

Discussion

953.	A simple pendulum takes 5 seconds to complete 12 oscillations. What will be the time period of pendulum?
Answer» A simple pendulum takes $5$ seconds to complete $12$ oscillations. What will be the time period of pendulum?

Discussion

954.	what is acid rain and degeneracy?
Answer» what is acid rain and degeneracy?

Discussion

955.	1 u or 1 amu means
Answer» 1 u or 1 amu means

Discussion

956.	Question 8. Chlorination makes water fit for human consumption. How? Name two chemicals used to disinfect water?
Answer» Question 8. Chlorination makes water fit for human consumption. How? Name two chemicals used to disinfect water?

956.

Question 8. Chlorination makes water fit for human consumption. How? Name two chemicals used to disinfect water?

Answer»

Question 8.

Chlorination makes water fit for human consumption. How?

Name two chemicals used to disinfect water?

Discussion

957.	Deffrentiate between homogeneous and heterogeneous mixtures
Answer» Deffrentiate between homogeneous and heterogeneous mixtures

Discussion

958.

Fill in the blanks using the words given in the box. ignition, petrol, combustion, calorific value, combustible, inflammable (a) A chemical process in which a substance reacts with oxygen to give off heat is called .(b) Wood, paper, CNG are substances.(c) The lowest temperature at which a substance catches fire is called its temperature.(d) Ignition temperature of _ is lower than that of wood.(e) The substances which have very low _ temperature and can easily catch fire with a flame are called _ substances.(f) The amount of heat energy produced on complete combustion of 1kg of a fuel is called its __.

Answer» Fill in the blanks using the words given in the box.

ignition, petrol, combustion, calorific value, combustible, inflammable

(a) A chemical process in which a substance reacts with oxygen to give off heat is called ______.

(b) Wood, paper, CNG are __________ substances.

(c) The lowest temperature at which a substance catches fire is called its ______ temperature.

(d) Ignition temperature of _______ is lower than that of wood.

(e) The substances which have very low _______ temperature and can easily catch fire with a flame are called _______ substances.

(f) The amount of heat energy produced on complete combustion of 1kg of a fuel is called its ______.

Discussion

959.	how to find which group is more active for electrophillic subsitution reaction
Answer» how to find which group is more active for electrophillic subsitution reaction

Discussion

960.	Define the terms dispersed phase and dispersion medium with examples.
Answer» Define the terms dispersed phase and dispersion medium with examples.

Discussion

961.	what is the formula of instantaneous rate of reaction?
Answer» what is the formula of instantaneous rate of reaction?

Discussion

962.

Write word equations for two chemical reactions with the help of materials given in the box. Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water

Answer» Write word equations for two chemical reactions with the help of materials given in the box.

Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water

Discussion

963.	When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.
Answer» When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.

Discussion

964.	Equinormal solution of two weak acids , HA(pKa= 3) and HB (pKb = 5) are each placed in contact with standard hydrogen electrode at 25oC. When a cell is construsted by interconnecting them through a salt bridge , find the emf of the cell.
Answer» Equinormal solution of two weak acids , HA(pKa= 3) and HB (pKb = 5) are each placed in contact with standard hydrogen electrode at 25oC. When a cell is construsted by interconnecting them through a salt bridge , find the emf of the cell.

Discussion

965.	Which gas is evolved at cathode on electrolysis of aqueous sodium sulphate using platinum electrodes?
Answer» Which gas is evolved at cathode on electrolysis of aqueous sodium sulphate using platinum electrodes?

Discussion

966.	Define Rusting and how can we prevent rusting? [3 MARKS]
Answer» Define Rusting and how can we prevent rusting? [3 MARKS]

Discussion

967.	How electric field is created in a conductor when we connect the battery and create potential differences across the conductor?
Answer» How electric field is created in a conductor when we connect the battery and create potential differences across the conductor?

Discussion

968.	A student while heating solid lead nitrate taken in a test-tube would observe :(1) white residue of PbO2(2) green residue of NO2(3) yellow residue of PbO(4) brown residue of NO
Answer» A student while heating solid lead nitrate taken in a test-tube would observe : (1) white residue of PbO2 (2) green residue of NO₂ (3) yellow residue of PbO (4) brown residue of NO

968.

A student while heating solid lead nitrate taken in a test-tube would observe :(1) white residue of PbO2(2) green residue of NO2(3) yellow residue of PbO(4) brown residue of NO

Answer»

A student while heating solid lead nitrate taken in a test-tube would observe :

(1) white residue of PbO2

(2) green residue of NO₂

(3) yellow residue of PbO

(4) brown residue of NO

Discussion

969.	How can we mix and acid and acid ? How can we mix Nitric acid and Hydrochloric Acid withoutgetting hurt?
Answer» How can we mix and acid and acid ? How can we mix Nitric acid and Hydrochloric Acid withoutgetting hurt?

Discussion

970.	25.what is bond enthalpy of ionic compound
Answer» 25.what is bond enthalpy of ionic compound

Discussion

971.	(NH4)+, (SO4)2− are examples of _________________.
Answer» $({N H}_{4})^{+}$ , $({S O}_{4})^{2 -}$ are examples of _________________.

Discussion

972.	2. Two elements X and Y (atomic mass of x is equal to 75 and Y is equal to 16) combined to give a compound having 76% of x. The formula of compound is
Answer» 2. Two elements X and Y (atomic mass of x is equal to 75 and Y is equal to 16) combined to give a compound having 76% of x. The formula of compound is

Discussion

973.	Question 2Which type of organic and Inorganic impurities are present in sewage?
Answer» Question 2 Which type of organic and Inorganic impurities are present in sewage?

973.

Question 2Which type of organic and Inorganic impurities are present in sewage?

Answer»

Question 2

Which type of organic and Inorganic impurities are present in sewage?

Discussion

974.	81. How many unit cells can be made out of an 18-carat pure 197 g sample of gold? (Gold has fcc structure, Atomic mass of gold =197u ,NA=Avogadro number) 1)3NA÷16 2)4NA 3)NA 4)NA÷
Answer» 81. How many unit cells can be made out of an 18-carat pure 197 g sample of gold? (Gold has fcc structure, Atomic mass of gold =197u ,NA=Avogadro number) 1)3NA÷16 2)4NA 3)NA 4)NA÷

Discussion

975.	What is electronegative and electropositive species? Also explain in terms of redox reaction
Answer» What is electronegative and electropositive species? Also explain in terms of redox reaction

Discussion

976.	What is presipitate ? And how do make chemical formulas?
Answer» What is presipitate ? And how do make chemical formulas?

Discussion

977.	Mole fraction of a gas in water is 0.001 at STP determine its Henry 's law constant
Answer» Mole fraction of a gas in water is 0.001 at STP determine its Henry 's law constant

Discussion

978.	Which of the following factors don't affect the process of electrolysis? Type in the appropriate number here. ___ Concentration of the electrolyte Galvanometer Size of the electrode Nature of the metal used Current Voltage
Answer» Which of the following factors don't affect the process of electrolysis? Type in the appropriate number here. ___ Concentration of the electrolyte Galvanometer Size of the electrode Nature of the metal used Current Voltage

Discussion

979.	Match the following. Relate physical states used in Chemical reaction to their symbols. Physical StateSymbol1.Gas(A) (dw)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water (solution with water)(D) (l)(E) (s)(F) (v)
Answer» Match the following. Relate physical states used in Chemical reaction to their symbols. $\begin{matrix} Physical State & Symbol 1.Gas & (A) (dw) 2.Solid & (B) (g) 3.Liquid & (C) (aq) 4.Dissolved in water (solution with water) & (D) (l) (E) (s) (F) (v) \end{matrix}$

979.

Match the following. Relate physical states used in Chemical reaction to their symbols. Physical StateSymbol1.Gas(A) (dw)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water (solution with water)(D) (l)(E) (s)(F) (v)

Answer»

Match the following.

Relate physical states used in Chemical reaction to their symbols.

$\begin{matrix} Physical State & Symbol 1.Gas & (A) (dw) 2.Solid & (B) (g) 3.Liquid & (C) (aq) 4.Dissolved in water (solution with water) & (D) (l) (E) (s) (F) (v) \end{matrix}$

Discussion

980.	Write the following in the form of a word equation: Sodium hydroxide reacts with Calcium Bromide to form Calcium Hydroxide and Sodium Bromide.In the formula CaBr2 what does Ca stand for and what is its valency?
Answer» Write the following in the form of a word equation: Sodium hydroxide reacts with Calcium Bromide to form Calcium Hydroxide and Sodium Bromide.In the formula $C a B r_{2}$ what does $C a$ stand for and what is its valency?

Discussion

981.	A diver is able to cut throw water in swimming pool.Which property of matter does this observation show?
Answer» A diver is able to cut throw water in swimming pool.Which property of matter does this observation show?

Discussion

982.	14.Which of the following electronic configuration do not represent The s block elements? 1) (Ar)3d54s2 2) (Ar) 3d104s1. 3) (Kr) 5s2 4) (Xe) of M+ ion
Answer» 14.Which of the following electronic configuration do not represent The s block elements? 1) (Ar)3d54s2 2) (Ar) 3d104s1. 3) (Kr) 5s2 4) (Xe) of M+ ion

Discussion

983.	What are decomposers? Name any two of them. What do they do in the forest?
Answer» What are decomposers? Name any two of them. What do they do in the forest?

Discussion

984.	In acids and bases doubt is that why do we tell concentrated acid or base
Answer» In acids and bases doubt is that why do we tell concentrated acid or base

Discussion

985.	How can energy be conserved while using washing machine?
Answer» How can energy be conserved while using washing machine?

Discussion

986.	What are the important characteristics of particles of matter?
Answer» What are the important characteristics of particles of matter?

Discussion

987.	How will you justify that overcoming the pollution is a powerful way of environmental management?
Answer» How will you justify that overcoming the pollution is a powerful way of environmental management?

Discussion

988.	Activated sludge is obtained after aeration, settling and filtration using sand beds. Choose the options that are true regarding activated sludge.
Answer» Activated sludge is obtained after aeration, settling and filtration using sand beds. Choose the options that are true regarding activated sludge.

Discussion

989.	Why are the dew drops present on leaves, even though it had not rained last night?
Answer» Why are the dew drops present on leaves, even though it had not rained last night?

Discussion

990.	Which acid is present in onion
Answer» Which acid is present in onion

Discussion

991.	A neutron travelling with a velocity collides head on, with a nucleus of an atom of mass no. A at rest. The fraction of energy retained by the neutron is
Answer» A neutron travelling with a velocity collides head on, with a nucleus of an atom of mass no. A at rest. The fraction of energy retained by the neutron is

Discussion

992.	(a) Draw the symbols to represent the following components of electrical circuits: cell, bulb, switch in the ‘ON’ position, switch in the ‘OFF’ position and battery.(b) An electrician is doing some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response. [5 MARKS]
Answer» (a) Draw the symbols to represent the following components of electrical circuits: cell, bulb, switch in the ‘ON’ position, switch in the ‘OFF’ position and battery. (b) An electrician is doing some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response. [5 MARKS]

Discussion

993.	20.0 g of a magnesium carbonate sample decomposes on heating to give carbondioxide and 8.0g of magnesium oxide.what will be the percentage purity of magnesium carbonate in thje sampl
Answer» 20.0 g of a magnesium carbonate sample decomposes on heating to give carbondioxide and 8.0g of magnesium oxide.what will be the percentage purity of magnesium carbonate in thje sampl

Discussion

994.	How many grams of calcium oxide is obtained on heating 100 g of CaCO3?
Answer» How many grams of calcium oxide is obtained on heating 100 g of CaCO3?

Discussion

995.	In a video physics sir(as I don't his name) says that an acid converts litmus blue but in chemistry's video Mam(I also don't know her name too) says bases converts litmus blue. Who is right?
Answer» In a video physics sir(as I don't his name) says that an acid converts litmus blue but in chemistry's video Mam(I also don't know her name too) says bases converts litmus blue. Who is right?

Discussion

996.	How many shell are resent in hydrogen atom?
Answer» How many shell are resent in hydrogen atom?

Discussion

997.	Water shortage has become a matter of concern throughout the world. Understanding the pressing need of the hour, you decided to organize an event emphasizing the importance of water on World's Water day. This was done on:
Answer» Water shortage has become a matter of concern throughout the world. Understanding the pressing need of the hour, you decided to organize an event emphasizing the importance of water on World's Water day. This was done on:

Discussion

998.	If E0Cu\|Cu+=−0.53 V and E0Cu+\|Cu2+=−0.15 VFor given cell,Pt(s)\|H2(g,101325 pascal)\|H2SO4(aq.)\|\|Cu2+(aq., 1M)\|Cu(s)Ecell=0.34V at 298KThen, the molarity of H2SO4(aq.) solution is equal to:
Answer» If $E_{C u \| C u^{+}}^{0} = - 0.53 V$ and $E_{C u^{+} \| C u^{2 +}}^{0} = - 0.15 V$ For given cell, $P t (s) \| H_{2} (g, 101325 p a s c a l) \| H_{2} S O_{4} (a q .) \| \| C u^{2 +} (a q ., 1 M) \| C u (s)$ $E_{c e l l} = 0.34 V a t 298 K$ Then, the molarity of $H_{2} S O_{4} (a q .)$ solution is equal to:

Discussion

999.	The rate of a reaction triples when temperature changes from 20oCto50oC. The energy of activation for the reaction is(R=8.314 JK−1 mol−1)
Answer» The rate of a reaction triples when temperature changes from $20^{o} C t o 50^{o} C .$ The energy of activation for the reaction is ( $R = 8.314 J K^{- 1} m o l^{- 1}$ )

Discussion

1000.	Thermal stability order :- XeO_3 ,XeOF_4, XeO_2F_{2 }?
Answer» Thermal stability order :- XeO_3 ,XeOF_4, XeO_2F_{2 }?

Discussion

Explore topic-wise InterviewSolutions in .

What is stainless steel alloy consist of?

A neutron makes a head on elastic collision with a stationary deutron. the fractional energy loss of the neutron in collision is 16/81 8/9 8/27 2/3

A simple pendulum takes 5 seconds to complete 12 oscillations. What will be the time period of pendulum?

what is acid rain and degeneracy?

1 u or 1 amu means

Question 8. Chlorination makes water fit for human consumption. How? Name two chemicals used to disinfect water?

Deffrentiate between homogeneous and heterogeneous mixtures

how to find which group is more active for electrophillic subsitution reaction

Define the terms dispersed phase and dispersion medium with examples.

what is the formula of instantaneous rate of reaction?

Write word equations for two chemical reactions with the help of materials given in the box.​ Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water​

When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.​

Equinormal solution of two weak acids , HA(pKa= 3) and HB (pKb = 5) are each placed in contact with standard hydrogen electrode at 25oC. When a cell is construsted by interconnecting them through a salt bridge , find the emf of the cell.

Which gas is evolved at cathode on electrolysis of aqueous sodium sulphate using platinum electrodes?

Define Rusting and how can we prevent rusting? [3 MARKS]

How electric field is created in a conductor when we connect the battery and create potential differences across the conductor?

A student while heating solid lead nitrate taken in a test-tube would observe :(1) white residue of PbO2(2) green residue of NO2(3) yellow residue of PbO(4) brown residue of NO

How can we mix and acid and acid ? How can we mix Nitric acid and Hydrochloric Acid withoutgetting hurt?

25.what is bond enthalpy of ionic compound

(NH4)+, (SO4)2− are examples of _________________.

2. Two elements X and Y (atomic mass of x is equal to 75 and Y is equal to 16) combined to give a compound having 76% of x. The formula of compound is

Question 2Which type of organic and Inorganic impurities are present in sewage?

81. How many unit cells can be made out of an 18-carat pure 197 g sample of gold? (Gold has fcc structure, Atomic mass of gold =197u ,NA=Avogadro number) 1)3NA÷16 2)4NA 3)NA 4)NA÷

What is electronegative and electropositive species? Also explain in terms of redox reaction

What is presipitate ? And how do make chemical formulas?

Mole fraction of a gas in water is 0.001 at STP determine its Henry 's law constant

Which of the following factors don't affect the process of electrolysis? Type in the appropriate number here. ___ Concentration of the electrolyte Galvanometer Size of the electrode Nature of the metal used Current Voltage

Match the following. Relate physical states used in Chemical reaction to their symbols. Physical StateSymbol1.Gas(A) (dw)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water (solution with water)(D) (l)(E) (s)(F) (v)

Write the following in the form of a word equation: Sodium hydroxide reacts with Calcium Bromide to form Calcium Hydroxide and Sodium Bromide.In the formula CaBr2​ what does Ca stand for and what is its valency?

A diver is able to cut throw water in swimming pool.Which property of matter does this observation show?

14.Which of the following electronic configuration do not represent The s block elements? 1) (Ar)3d54s2 2) (Ar) 3d104s1. 3) (Kr) 5s2 4) (Xe) of M+ ion

What are decomposers? Name any two of them. What do they do in the forest?

In acids and bases doubt is that why do we tell concentrated acid or base

How can energy be conserved while using washing machine?

What are the important characteristics of particles of matter?

How will you justify that overcoming the pollution is a powerful way of environmental management?

Activated sludge is obtained after aeration, settling and filtration using sand beds. Choose the options that are true regarding activated sludge.

Why are the dew drops present on leaves, even though it had not rained last night?

Which acid is present in onion

A neutron travelling with a velocity collides head on, with a nucleus of an atom of mass no. A at rest. The fraction of energy retained by the neutron is

20.0 g of a magnesium carbonate sample decomposes on heating to give carbondioxide and 8.0g of magnesium oxide.what will be the percentage purity of magnesium carbonate in thje sampl

How many grams of calcium oxide is obtained on heating 100 g of CaCO3?

In a video physics sir(as I don't his name) says that an acid converts litmus blue but in chemistry's video Mam(I also don't know her name too) says bases converts litmus blue. Who is right?

How many shell are resent in hydrogen atom?

Water shortage has become a matter of concern throughout the world. Understanding the pressing need of the hour, you decided to organize an event emphasizing the importance of water on World's Water day. This was done on:

If E0Cu|Cu+=−0.53 V and E0Cu+|Cu2+=−0.15 VFor given cell,Pt(s)|H2(g,101325 pascal)|H2SO4(aq.)||Cu2+(aq., 1M)|Cu(s)Ecell=0.34V at 298KThen, the molarity of H2SO4(aq.) solution is equal to:

The rate of a reaction triples when temperature changes from 20oCto50oC. The energy of activation for the reaction is(R=8.314 JK−1 mol−1)

Thermal stability order :- XeO_3 ,XeOF_4, XeO_2F_{2 }?

Write word equations for two chemical reactions with the help of materials given in the box. Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water

When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.

Write the following in the form of a word equation: Sodium hydroxide reacts with Calcium Bromide to form Calcium Hydroxide and Sodium Bromide.In the formula CaBr2 what does Ca stand for and what is its valency?