15280 + Interview Questions in Chemistry Page 171 InterviewSolution

8501.	What is the function of teichoic acid in and in which bacteria is it found??
Answer» What is the function of teichoic acid in and in which bacteria is it found??

Discussion

8502.	What is the difference between allotropes and isotopes?
Answer» What is the difference between allotropes and isotopes?

Discussion

8503.	In group 16 elements, if the element has half filled sub shells in p orbital then, does it accept electrons and become negative or donates those electrons to have positive oxidation states
Answer» In group 16 elements, if the element has half filled sub shells in p orbital then, does it accept electrons and become negative or donates those electrons to have positive oxidation states

Discussion

8504.	hybridisation of carbon in CH2=CH+
Answer» hybridisation of carbon in CH2=CH+

Discussion

8505.	What is poh?
Answer» What is poh?

Discussion

8506.	Three liquids with masses m1,m2,m3 are thoroughly mixed, If their specific heats are c1,c2,c3 and their temperatures T1,T2,T3 respectively, then the temperature of the mixture is
Answer» Three liquids with masses $m_{1}, m_{2}, m_{3}$ are thoroughly mixed, If their specific heats are $c_{1}, c_{2}, c_{3}$ and their temperatures $T_{1}, T_{2}, T_{3}$ respectively, then the temperature of the mixture is

Discussion

8507.	(a) Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (i) forms an anion, (ii) forms a cation, (b) State the type of bond between Y and Z and give its molecular formula.
Answer» (a) Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (i) forms an anion, (ii) forms a cation, (b) State the type of bond between Y and Z and give its molecular formula.

8507.

(a) Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (i) forms an anion, (ii) forms a cation, (b) State the type of bond between Y and Z and give its molecular formula.

Answer»

(a) Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one :

(i) forms an anion, (ii) forms a cation,

(b) State the type of bond between Y and Z and give its molecular formula.

Discussion

8508.	Calculate the mass of 1 atom of C14.
Answer» Calculate the mass of 1 atom of C14.

Discussion

8509.	a particle located in one dimensional potential field has potential energy function u=a/x^2 -b/x^3 where a and b are positive constant the position of equilibrium corresponds to
Answer» a particle located in one dimensional potential field has potential energy function u=a/x^2 -b/x^3 where a and b are positive constant the position of equilibrium corresponds to

Discussion

8510.	As we know that in Electrolytic Refining impure metal is made up of anode while pure one is of cathode now electricity passed then impure metal is deposited into the pure metal How this can be possible as current flow from cathode to anode ( Actual current)
Answer» As we know that in Electrolytic Refining impure metal is made up of anode while pure one is of cathode now electricity passed then impure metal is deposited into the pure metal How this can be possible as current flow from cathode to anode ( Actual current)

Discussion

8511.	What happens when you mix salt with water? What is this property called? What would happen if we use chalk powder instead of salt? Why? How can you classify materials based on this property?
Answer» What happens when you mix salt with water? What is this property called? What would happen if we use chalk powder instead of salt? Why? How can you classify materials based on this property?

Discussion

8512.	How many sructural isomers are there in dimethylcyclopentae
Answer» How many sructural isomers are there in dimethylcyclopentae

Discussion

8513.	The molecular formulae of some organic compounds are given below. Which of these compounds contains an aldehyde group ? (a) C3H8O (b) C3H6O2 (c) C3H6O (d) C3H7Cl
Answer» The molecular formulae of some organic compounds are given below. Which of these compounds contains an aldehyde group ? (a) $C_{3} H_{8} O$ (b) $C_{3} H_{6} O_{2}$ (c) $C_{3} H_{6} O$ (d) $C_{3} H_{7} C l$

Discussion

8514.	Match the following iron ores with their formulae. Name of oreFormulai) Magnetitea)Fe2O3ii) Haematiteb)FeS2iii) Spathic iron orec)FeCO3iv) Iron pyrited)Fe3O4
Answer» Match the following iron ores with their formulae. $\begin{matrix} Name of ore & Formula i) Magnetite & a) F e_{2} O_{3} ii) Haematite & b) F e S_{2} iii) Spathic iron ore & c) F e C O_{3} iv) Iron pyrite & d) F e_{3} O_{4} \end{matrix}$

8514.

Match the following iron ores with their formulae. Name of oreFormulai) Magnetitea)Fe2O3ii) Haematiteb)FeS2iii) Spathic iron orec)FeCO3iv) Iron pyrited)Fe3O4

Answer»

Match the following iron ores with their formulae.

$\begin{matrix} Name of ore & Formula i) Magnetite & a) F e_{2} O_{3} ii) Haematite & b) F e S_{2} iii) Spathic iron ore & c) F e C O_{3} iv) Iron pyrite & d) F e_{3} O_{4} \end{matrix}$

Discussion

8515.	Among the following compounds, which will react with acetone to give product containing
Answer» Among the following compounds, which will react with acetone to give product containing

Discussion

8516.	If octane and propane are members of a homologous series, then these two compounds differ by ________.
Answer» If octane and propane are members of a homologous series, then these two compounds differ by ________.

Discussion

8517.	What do we mean by that covalent compound are made up of molecules?
Answer» What do we mean by that covalent compound are made up of molecules?

Discussion

8518.	Why group 13 or group 3A elements form electron deficient compound ? Give the reason.
Answer» Why group 13 or group 3A elements form electron deficient compound ? Give the reason.

Discussion

8519.	Which of the following belong to a homologous series? 1. HCOOH 2. CH3COOH 3. C2H6 4. C2H5COOH 5. C3H6
Answer» Which of the following belong to a homologous series? 1. $H C O O H$ 2. $C H_{3} C O O H$ 3. $C_{2} H_{6}$ 4. $C_{2} H_{5} C O O H$ 5. $C_{3} H_{6}$

Discussion

8520.	What do you observe when barium chloride solution is added to dilute sulphuric acid?
Answer» What do you observe when barium chloride solution is added to dilute sulphuric acid?

Discussion

8521.	An electron of mass m and magnitude of charge \|e\|, initially at rest, gets accelerated by a constant electric field E. The rate of change of de-Broglie wavelength of this electron at time t, ignoring relativistic effects, is:
Answer» An electron of mass $m$ and magnitude of charge $\| e \|$ , initially at rest, gets accelerated by a constant electric field $E$ . The rate of change of de-Broglie wavelength of this electron at time $t$ , ignoring relativistic effects, is:

Discussion

8522.	Mn + dil.HNO3 → Salt + ?
Answer» Mn + dil.HNO₃→ Salt + ?

Discussion

8523.	The term isomerism applies to organic compounds with the same __.
Answer» The term isomerism applies to organic compounds with the same __.

Discussion

8524.	Name the gas evolved when an oxide and concentrated hydrochloric acid are heated.
Answer» Name the gas evolved when an oxide and concentrated hydrochloric acid are heated.

Discussion

8525.	69. How much electricity is required in coulomb for the oxidation of i) 1 mol of H2O to O2? ii)1 mol of FeO to Fe2O3 ?
Answer» 69. How much electricity is required in coulomb for the oxidation of i) 1 mol of H2O to O2? ii)1 mol of FeO to Fe2O3 ?

Discussion

8526.	what is meaning of same plane
Answer» what is meaning of same plane

Discussion

8527.	The weight of white precipitate obtained when 0.1 mole of acetylene gas is passed through ammoniacal silver nitrate solution is
Answer» The weight of white precipitate obtained when 0.1 mole of acetylene gas is passed through ammoniacal silver nitrate solution is

Discussion

8528.	na 29.1% s 40.5%and o30.4% caluclate emprical formula
Answer» na 29.1% s 40.5%and o30.4% caluclate emprical formula

Discussion

8529.	Why is it necessary to add acid to water before proceeding with the electrolysis of 'water'?
Answer» Why is it necessary to add acid to water before proceeding with the electrolysis of 'water'?

Discussion

8530.	What are homologous series? Explain some of the properties of homologous series.
Answer» What are homologous series? Explain some of the properties of homologous series.

Discussion

8531.	what is MA4BC TYPE?
Answer» what is MA4BC TYPE?

Discussion

8532.	A scrap metal dealer gets a huge consignment of crude metallic Lead. For a profitable deal he needs to refine the metal using electrolysis. Which one of the following is a good choice for an electrolyte?
Answer» A scrap metal dealer gets a huge consignment of crude metallic Lead. For a profitable deal he needs to refine the metal using electrolysis. Which one of the following is a good choice for an electrolyte?

Discussion

8533.	Describe an experiment to prove the following:(i) HCl gas is heavier than air.(ii) HCl gas is highly soluble in water.(iii) HCl gas contains the element chlorine.
Answer» Describe an experiment to prove the following: (i) HCl gas is heavier than air. (ii) HCl gas is highly soluble in water. (iii) HCl gas contains the element chlorine.

Discussion

8534.	The electrode potential of hydrogen electrode is when H3O+ ion concentration is 10^-5 M (pH2 = 1atm)1.)-0.059 V2.)-0.295 V3.)-0.118 V4.)-0.59 V
Answer» The electrode potential of hydrogen electrode is when H3O+ ion concentration is 10^-5 M (pH2 = 1atm) 1.)-0.059 V 2.)-0.295 V 3.)-0.118 V 4.)-0.59 V

Discussion

8535.	A first order reaction is 50% completed in 20 min at 27^°C and in 5 min. at 47^°C. The energy of activation of the reaction is : (a) 43.85 KJ/mol (b) 55.14 KJ/mol (c) 11.97 KJ/mol (d) 6.65 KJ/mol
Answer» A first order reaction is 50% completed in 20 min at 27^°C and in 5 min. at 47^°C. The energy of activation of the reaction is : (a) 43.85 KJ/mol (b) 55.14 KJ/mol (c) 11.97 KJ/mol (d) 6.65 KJ/mol

Discussion

8536.	Why the usage of the following products given in the image have to be minimized?
Answer» Why the usage of the following products given in the image have to be minimized?

8536.

Why the usage of the following products given in the image have to be minimized?

Answer»

Why the usage of the following products given in the image have to be minimized?

Discussion

8537.

Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solution of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x). Aqueous salt solution Colour of precipitate when NaOH is added in a small quantity Nature of precipitate (soluble or insoluble) when NaOH is added in excess Copper (II) sulphate Zinc nitrate Lead nitrate Calcium chloride Iron (III) sulphate (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) (ix) (x)

Answer» Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solution of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x).

Aqueous salt solution	Colour of precipitate when NaOH is added in a small quantity	Nature of precipitate (soluble or insoluble) when NaOH is added in excess
Copper (II) sulphate Zinc nitrate Lead nitrate Calcium chloride Iron (III) sulphate	(i) (ii) (iii) (iv) (v)	(vi) (vii) (viii) (ix) (x)

Discussion

8538.	Write the equations for the following lab. preparations: (a) Ethane from sodium propionate, (b) Ethene from Iodoethane, (c) Ethyne from calcium carbide, (d) Methanol from Iodomethane.
Answer» Write the equations for the following lab. preparations: (a) Ethane from sodium propionate, (b) Ethene from Iodoethane, (c) Ethyne from calcium carbide, (d) Methanol from Iodomethane.

Discussion

8539.	In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.
Answer» In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.

Discussion

8540.	On what basis is a chemical equation balanced ?
Answer» On what basis is a chemical equation balanced ?

Discussion

8541.	All of the following are the members of the same homologous series, except
Answer» All of the following are the members of the same homologous series, except

Discussion

8542.	Write three structure isomers for pentane. [3 MARKS]
Answer» Write three structure isomers for pentane. [3 MARKS]

Discussion

8543.	A red-brown metal X forms a salt XSO4. When hydrogen sulphide gas is passed through an aqueous solution of XSO4, then a black precipitate of XS is formed alongwith sulphuric acid solution. (a) What could the salt XSO4 be ? (b) What is the colous of salt XSO4 ? (c) Name the black precipitate XS. (d) By using the formula of the salt obtained in (a) above, write an equation of the reaction which takes place when hydrogen sulphide gas is passed through its aqueous solution. (e) What type of chemical reacion takes place in this case ?
Answer» A red-brown metal X forms a salt $X S O_{4}$ . When hydrogen sulphide gas is passed through an aqueous solution of $X S O_{4}$ , then a black precipitate of XS is formed alongwith sulphuric acid solution. (a) What could the salt $X S O_{4}$ be ? (b) What is the colous of salt $X S O_{4}$ ? (c) Name the black precipitate XS. (d) By using the formula of the salt obtained in (a) above, write an equation of the reaction which takes place when hydrogen sulphide gas is passed through its aqueous solution. (e) What type of chemical reacion takes place in this case ?

8543.

A red-brown metal X forms a salt XSO4. When hydrogen sulphide gas is passed through an aqueous solution of XSO4, then a black precipitate of XS is formed alongwith sulphuric acid solution. (a) What could the salt XSO4 be ? (b) What is the colous of salt XSO4 ? (c) Name the black precipitate XS. (d) By using the formula of the salt obtained in (a) above, write an equation of the reaction which takes place when hydrogen sulphide gas is passed through its aqueous solution. (e) What type of chemical reacion takes place in this case ?

Answer»

A red-brown metal X forms a salt $X S O_{4}$ . When hydrogen sulphide gas is passed through an aqueous solution of $X S O_{4}$ , then a black precipitate of XS is formed alongwith sulphuric acid solution.

(a) What could the salt $X S O_{4}$ be ?

(b) What is the colous of salt $X S O_{4}$ ?

(c) Name the black precipitate XS.

(d) By using the formula of the salt obtained in (a) above, write an equation of the reaction which takes place when hydrogen sulphide gas is passed through its aqueous solution.

(e) What type of chemical reacion takes place in this case ?

Discussion

8544.	The molecular mass of sulphuric acid is ___ g/mol.
Answer» The molecular mass of sulphuric acid is ___ g/mol.

Discussion

8545.	What is the molecular formula of a compound? Give examples.
Answer» What is the molecular formula of a compound? Give examples.

Discussion

8546.	What are the products obtained upon the electrolysis of aqueous solution of sodium nitrate?
Answer» What are the products obtained upon the electrolysis of aqueous solution of sodium nitrate?

Discussion

8547.	_________ is the process in which a thin film of a metal gets deposited on another metallic article.
Answer» _________ is the process in which a thin film of a metal gets deposited on another metallic article.

Discussion

8548.	What happens when ethanol i)is burnt in air and ii)it is oxidized with equations
Answer» What happens when ethanol i)is burnt in air and ii)it is oxidized with equations

8548.

What happens when ethanol i)is burnt in air and ii)it is oxidized with equations

Answer»

What happens when ethanol

i)is burnt in air and ii)it is oxidized with equations

Discussion

8549.	A student was working in a chemistry laboratory. He found that a bottle contained a white powdery substance but half of the label on the bottle was torn. The part of label still sticking to the bottle had NaH written on it. The student took this powdery substance in a test-tube and added dil. HCl to it. A gas was evolved which extinguished a burning match-stick.(a) Name the gas evolved.(b) Write the formula of white powdery substance.
Answer» A student was working in a chemistry laboratory. He found that a bottle contained a white powdery substance but half of the label on the bottle was torn. The part of label still sticking to the bottle had NaH written on it. The student took this powdery substance in a test-tube and added dil. HCl to it. A gas was evolved which extinguished a burning match-stick. (a) Name the gas evolved. (b) Write the formula of white powdery substance.

Discussion

8550.	Can rusting of iron takes place in distilled water ?
Answer» Can rusting of iron takes place in distilled water ?

Discussion

Explore topic-wise InterviewSolutions in .

What is the function of teichoic acid in and in which bacteria is it found??

What is the difference between allotropes and isotopes?

In group 16 elements, if the element has half filled sub shells in p orbital then, does it accept electrons and become negative or donates those electrons to have positive oxidation states

hybridisation of carbon in CH2=CH+

What is poh?

Three liquids with masses m1,m2,m3 are thoroughly mixed, If their specific heats are c1,c2,c3 and their temperatures T1,T2,T3 respectively, then the temperature of the mixture is

(a) Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : (i) forms an anion, (ii) forms a cation, (b) State the type of bond between Y and Z and give its molecular formula.

Calculate the mass of 1 atom of C14.

a particle located in one dimensional potential field has potential energy function u=a/x^2 -b/x^3 where a and b are positive constant the position of equilibrium corresponds to

As we know that in Electrolytic Refining impure metal is made up of anode while pure one is of cathode now electricity passed then impure metal is deposited into the pure metal How this can be possible as current flow from cathode to anode ( Actual current)

What happens when you mix salt with water? What is this property called? What would happen if we use chalk powder instead of salt? Why? How can you classify materials based on this property?

How many sructural isomers are there in dimethylcyclopentae

The molecular formulae of some organic compounds are given below. Which of these compounds contains an aldehyde group ? (a) C3H8O (b) C3H6O2 (c) C3H6O (d) C3H7Cl

Match the following iron ores with their formulae. Name of oreFormulai) Magnetitea)Fe2O3ii) Haematiteb)FeS2iii) Spathic iron orec)FeCO3iv) Iron pyrited)Fe3O4

Among the following compounds, which will react with acetone to give product containing

If octane and propane are members of a homologous series, then these two compounds differ by ________.

What do we mean by that covalent compound are made up of molecules?

Why group 13 or group 3A elements form electron deficient compound ? Give the reason.

Which of the following belong to a homologous series? 1. HCOOH 2. CH3COOH 3. C2H6 4. C2H5COOH 5. C3H6

What do you observe when barium chloride solution is added to dilute sulphuric acid?

An electron of mass m and magnitude of charge |e|, initially at rest, gets accelerated by a constant electric field E. The rate of change of de-Broglie wavelength of this electron at time t, ignoring relativistic effects, is:

Mn + dil.HNO3 → Salt + ?

The term isomerism applies to organic compounds with the same __.

Name the gas evolved when an oxide and concentrated hydrochloric acid are heated.

69. How much electricity is required in coulomb for the oxidation of i) 1 mol of H2O to O2? ii)1 mol of FeO to Fe2O3 ?

what is meaning of same plane

The weight of white precipitate obtained when 0.1 mole of acetylene gas is passed through ammoniacal silver nitrate solution is

na 29.1% s 40.5%and o30.4% caluclate emprical formula

Why is it necessary to add acid to water before proceeding with the electrolysis of 'water'?

What are homologous series? Explain some of the properties of homologous series.

what is MA4BC TYPE?

A scrap metal dealer gets a huge consignment of crude metallic Lead. For a profitable deal he needs to refine the metal using electrolysis. Which one of the following is a good choice for an electrolyte?

Describe an experiment to prove the following:(i) HCl gas is heavier than air.(ii) HCl gas is highly soluble in water.(iii) HCl gas contains the element chlorine.

The electrode potential of hydrogen electrode is when H3O+ ion concentration is 10^-5 M (pH2 = 1atm)1.)-0.059 V2.)-0.295 V3.)-0.118 V4.)-0.59 V

A first order reaction is 50% completed in 20 min at 27^°C and in 5 min. at 47^°C. The energy of activation of the reaction is : (a) 43.85 KJ/mol (b) 55.14 KJ/mol (c) 11.97 KJ/mol (d) 6.65 KJ/mol

Why the usage of the following products given in the image have to be minimized?

Write the equations for the following lab. preparations: (a) Ethane from sodium propionate, (b) Ethene from Iodoethane, (c) Ethyne from calcium carbide, (d) Methanol from Iodomethane.

In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.

On what basis is a chemical equation balanced ?

All of the following are the members of the same homologous series, except

Write three structure isomers for pentane. [3 MARKS]

The molecular mass of sulphuric acid is ___ g/mol.

What is the molecular formula of a compound? Give examples.

What are the products obtained upon the electrolysis of aqueous solution of sodium nitrate?

_________ is the process in which a thin film of a metal gets deposited on another metallic article.

What happens when ethanol i)is burnt in air and ii)it is oxidized with equations

Can rusting of iron takes place in distilled water ?