15280 + Interview Questions in Chemistry Page 170 InterviewSolution

8451.	What kind of waste can compost be made from- biodegradable or non-biodegradable?
Answer» What kind of waste can compost be made from- biodegradable or non-biodegradable?

Discussion

8452.	11. rst__st_s_tt_ _rrst(1) rsttrr(2)rsrtrr(3) rrstst(4) srtrst
Answer» 11. rst__st_s_tt_ _rrst (1) rsttrr (2) rsrtrr (3) rrstst (4) srtrst

Discussion

8453.	The elements P, Q and R are one of the Döbereiner's triad of elements in the increasing order of their atomic masses. If the atomic masses of P, Q and R are x, y and z respectively, then
Answer» The elements P, Q and R are one of the Döbereiner's triad of elements in the increasing order of their atomic masses. If the atomic masses of P, Q and R are $x, y$ and $z$ respectively, then

Discussion

8454.	Shape of XeOF4 is generally called : square pyramidal. But I think square bi-pyramidal as lone pair repels Xe-F bonds more significantly than that of Xe-O bond pair.
Answer» Shape of XeOF4 is generally called : square pyramidal. But I think square bi-pyramidal as lone pair repels Xe-F bonds more significantly than that of Xe-O bond pair.

Discussion

8455.	Base used in cooking examples
Answer» Base used in cooking examples

Discussion

8456.	5g of metal oxide educed too 3.4g of the metal if the gram atomic mass of the metal is 51g\mol what is the formula of metal oxide
Answer» 5g of metal oxide educed too 3.4g of the metal if the gram atomic mass of the metal is 51g\mol what is the formula of metal oxide

Discussion

8457.	Name the constituents of: (a) Duralumin, (b) Solder, (c) Bronze, (d) Invar.
Answer» Name the constituents of: (a) Duralumin, (b) Solder, (c) Bronze, (d) Invar.

8457.

Name the constituents of: (a) Duralumin, (b) Solder, (c) Bronze, (d) Invar.

Answer»

Name the constituents of:

(a) Duralumin, (b) Solder,

(c) Bronze, (d) Invar.

Discussion

8458.	47. A gaseous reaction A2(g) -------> B(g) + 1/2C(g) Shows increase in pressure form 100mm to 120 mm in 5 minutes. The rates of disappearance of A2 and unit of gaseous reaction
Answer» 47. A gaseous reaction A2(g) -------> B(g) + 1/2C(g) Shows increase in pressure form 100mm to 120 mm in 5 minutes. The rates of disappearance of A2 and unit of gaseous reaction

Discussion

8459.	Is every ionization energy(I.E. 1 st ,2nd or any ) equal to the negative (- )of elctron gain enthalpy ?
Answer» Is every ionization energy(I.E. 1 st ,2nd or any ) equal to the negative (- )of elctron gain enthalpy ?

Discussion

8460.	Some crops are suitable for growing in soil with acidic nature. Which salt can be added, in order to increase the acidic nature of the soil?
Answer» Some crops are suitable for growing in soil with acidic nature. Which salt can be added, in order to increase the acidic nature of the soil?

Discussion

8461.	What pH values can a universal indicator detect?
Answer» What pH values can a universal indicator detect?

Discussion

8462.	Count the number of stereocentres in the molecule below:
Answer» Count the number of stereocentres in the molecule below:

8462.

Count the number of stereocentres in the molecule below:

Answer»

Count the number of stereocentres in the molecule below:

Discussion

8463.	If a is the length of the side of a cube the dis†an ce between the body centered atom and one corner atom in the cube will b
Answer» If a is the length of the side of a cube the dis†an ce between the body centered atom and one corner atom in the cube will b

Discussion

8464.	Which of the following has maximum standard reduction potential1) Li2) K3) F4) Cl
Answer» Which of the following has maximum standard reduction potential 1) Li 2) K 3) F 4) Cl

Discussion

8465.	How is the concentration of hydronium ions (H3O+) affected when the solution of an acid is diluted ?
Answer» How is the concentration of hydronium ions $(H_{3} O^{+})$ affected when the solution of an acid is diluted ?

Discussion

8466.	An ideal sort is an In-place sort whose additional space requirement is
Answer» An ideal sort is an In-place sort whose additional space requirement is

Discussion

8467.	Question 28Which of the following represents saponification reaction?(a) CH3COONa+NaOHCaO−−→CH4+Na2CO3(b) CH3COOH+C2H5OHH2SO4−−−−→CH3COOC2H5+H2O(c) 2CH3COOH+2Na→2CH3COONa+H2(d) CH3COOC2H5+NaOH→CH3COONa+C2H5OH
Answer» Question 28 Which of the following represents saponification reaction? (a) $C H_{3} C O O N a + N a O H C a O - - \to C H_{4} + N a_{2} C O_{3}$ (b) $C H_{3} C O O H + C_{2} H_{5} O H H_{2} S O_{4} - --- \to C H_{3} C O O C_{2} H_{5} + H_{2} O$ (c) $2 C H_{3} C O O H + 2 N a \to 2 C H_{3} C O O N a + H_{2}$ (d) $C H_{3} C O O C_{2} H_{5} + N a O H \to C H_{3} C O O N a + C_{2} H_{5} O H$

Discussion

8468.	What is froth flotation ? Explain by giving examples . Can this be asked in board exam .
Answer» What is froth flotation ? Explain by giving examples . Can this be asked in board exam .

Discussion

8469.	Answer the following(1) Draw chain and ring structures of organic compound having six carbon atoms in them.(2) Which organic compounds are named as Alkanol in IUPAC system?(3) Explain : What do you understand by substitution reaction?(4) Which organic compounds readily undergo addition reactions? Why?(5) State two examples of (organic) compound having covalent bond and two examples having ionic bond.(6) State and explain how alkanes are further classified.(7) What are alkynes? Name the first member of alkyne family.
Answer» Answer the following (1) Draw chain and ring structures of organic compound having six carbon atoms in them. (2) Which organic compounds are named as Alkanol in IUPAC system? (3) Explain : What do you understand by substitution reaction? (4) Which organic compounds readily undergo addition reactions? Why? (5) State two examples of (organic) compound having covalent bond and two examples having ionic bond. (6) State and explain how alkanes are further classified. (7) What are alkynes? Name the first member of alkyne family.

8469.

Answer the following(1) Draw chain and ring structures of organic compound having six carbon atoms in them.(2) Which organic compounds are named as Alkanol in IUPAC system?(3) Explain : What do you understand by substitution reaction?(4) Which organic compounds readily undergo addition reactions? Why?(5) State two examples of (organic) compound having covalent bond and two examples having ionic bond.(6) State and explain how alkanes are further classified.(7) What are alkynes? Name the first member of alkyne family.

Answer»

Answer the following

(1) Draw chain and ring structures of organic compound having six carbon atoms in them.

(2) Which organic compounds are named as Alkanol in IUPAC system?

(3) Explain : What do you understand by substitution reaction?

(4) Which organic compounds readily undergo addition reactions? Why?

(5) State two examples of (organic) compound having covalent bond and two examples having ionic bond.

(6) State and explain how alkanes are further classified.

(7) What are alkynes? Name the first member of alkyne family.

Discussion

8470.	An example of a physical change is:
Answer» An example of a physical change is:

Discussion

8471.	2. The amount of heat evolved when 0.50 mole of HCl is mixed with 0.30 mole of NaOH solution is
Answer» 2. The amount of heat evolved when 0.50 mole of HCl is mixed with 0.30 mole of NaOH solution is

Discussion

8472.	Molecular formula of naphthaquinoneis
Answer» Molecular formula of naphthaquinone is

Discussion

8473.	Products obtained when Conc.HNO3 (Nitric acid ) is heated.
Answer» Products obtained when Conc. $H N O_{3}$ (Nitric acid ) is heated.

Discussion

8474.	We know that the C−HC−H bond is shorter in ethyne compared to ethane. So the intuitive idea that more overlap would lead to stronger bond formation is obviously incorrect. So what is the relation between relative overlap of two orbitals and their bond strength? Is there any use that we can get from this overlap?
Answer» We know that the C−HC−H bond is shorter in ethyne compared to ethane. So the intuitive idea that more overlap would lead to stronger bond formation is obviously incorrect. So what is the relation between relative overlap of two orbitals and their bond strength? Is there any use that we can get from this overlap?

8474.

We know that the C−HC−H bond is shorter in ethyne compared to ethane. So the intuitive idea that more overlap would lead to stronger bond formation is obviously incorrect. So what is the relation between relative overlap of two orbitals and their bond strength? Is there any use that we can get from this overlap?

Answer»

We know that the C−HC−H bond is shorter in ethyne compared to ethane. So the intuitive idea that more overlap would lead to stronger bond formation is obviously incorrect.

So what is the relation between relative overlap of two orbitals and their bond strength? Is there any use that we can get from this overlap?

Discussion

8475.	Write the IUPAC name of the following:(i) CH3CH2CH2CH2CH3(ii)(iii) CH3 CH2 CH=CH CH3(iv) CH3—C≡CH
Answer» Write the IUPAC name of the following: (i) CH₃CH₂CH₂CH₂CH₃ (ii) (iii) CH₃ CH₂ CH=CH CH₃ (iv) CH₃—C≡CH

Discussion

8476.	The hybridizations of the atomic orbitals of nitrogen in NO−2,NO+2 and NH+4 respectively are,
Answer» The hybridizations of the atomic orbitals of nitrogen in $N O_{2}^{-}, N O_{2}^{+} and N H_{4}^{+}$ respectively are,

Discussion

8477.	1 mole of gas are present in a container and the rate of reaction is r1. If same mole is taken in another container having volume half of the first container then new rate becomes twice. Calculate order of reaction.
Answer» 1 mole of gas are present in a container and the rate of reaction is r1. If same mole is taken in another container having volume half of the first container then new rate becomes twice. Calculate order of reaction.

Discussion

8478.	In a sample containing 3 hydrogen atoms excited to 4th orbit, the maximum and the minimum number of lines that will be obtained on de-excitation are respectively
Answer» In a sample containing 3 hydrogen atoms excited to 4th orbit, the maximum and the minimum number of lines that will be obtained on de-excitation are respectively

Discussion

8479.	For the following reaction, 2N2O5(g) → 4NO2(g)+O2(g) State the rate expression.
Answer» For the following reaction, $2 N_{2} O_{5} (g)$ $\to$ $4 N O_{2} (g) + O_{2} (g)$ State the rate expression.

8479.

For the following reaction, 2N2O5(g) → 4NO2(g)+O2(g) State the rate expression.

Answer»

For the following reaction,

$2 N_{2} O_{5} (g)$ $\to$ $4 N O_{2} (g) + O_{2} (g)$

State the rate expression.

Discussion

8480.	Which of the following is incorrect?
Answer» Which of the following is incorrect?

Discussion

8481.

Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions 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 solutions 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

8482.	Complete the following reaction: CH3CH2OH + O2 → +H2O
Answer» Complete the following reaction: $C H_{3} C H_{2} O H + O_{2} \to$ $+ H_{2} O$

Discussion

8483.	Question 5.4Translate the following statement into chemical equation and then balance it:Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
Answer» Question 5.4 Translate the following statement into chemical equation and then balance it: Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

Discussion

8484.	Which of the following is most basic in a solution of carbon tetrachloride. (1)NH3. (2)CH3CH2NH2. (3)(CH3CH2)2NH. (4)(CH3CH2)3N
Answer» Which of the following is most basic in a solution of carbon tetrachloride. (1)NH3. (2)CH3CH2NH2. (3)(CH3CH2)2NH. (4)(CH3CH2)3N

Discussion

8485.	1 atom of an element weighs 1.792 ×10^-22 g. The atomic weight of element is
Answer» 1 atom of an element weighs 1.792 ×10^-22 g. The atomic weight of element is

Discussion

8486.	Ques:- The highest value of third ionization enthalpy among the following is a-Be b-B c-N d-F
Answer» Ques:- The highest value of third ionization enthalpy among the following is a-Be b-B c-N d-F

Discussion

8487.	How do acids and bases react with each other? What is the name of the process? What product is obtained out of this reaction?
Answer» How do acids and bases react with each other? What is the name of the process? What product is obtained out of this reaction?

Discussion

8488.	Question 8In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Answer» Question 8 In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?

Discussion

8489.	Chloramphenicol is an
Answer» Chloramphenicol is an

Discussion

8490.	(a) Write two points of difference in the structures of diamond and graphite. (b) Explain why graphite can be used as a lubricant but diamond cannot. (c) Explain why diamond can be used in rock drilling equipment but graphite cannot. (d) State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
Answer» (a) Write two points of difference in the structures of diamond and graphite. (b) Explain why graphite can be used as a lubricant but diamond cannot. (c) Explain why diamond can be used in rock drilling equipment but graphite cannot. (d) State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.

Discussion

8491.	Question 7 Describe characteristics and uses of coke.
Answer» Question 7 Describe characteristics and uses of coke.

Discussion

8492.	aFe+bO2→ cFe2O3 For the above equation to represent a balanced equation, ratio of a, b and c respectively should be?
Answer» $a F e + b O_{2} \to c F e_{2} O_{3}$ For the above equation to represent a balanced equation, ratio of a, b and c respectively should be?

Discussion

8493.	(a) A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when reacts with copper. Identify B. Write equation with copper. (b) Complete the table : Name of ProcessInputsEquationOutputAmmoniaNitric acid+Air (c) What is the property of nitric acid which allows it to react with copper.
Answer» (a) A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when reacts with copper. Identify B. Write equation with copper. (b) Complete the table : $\begin{matrix} Name of Process & Inputs & Equation & Output Ammonia & Nitric acid +Air \end{matrix}$ (c) What is the property of nitric acid which allows it to react with copper.

8493.

(a) A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when reacts with copper. Identify B. Write equation with copper. (b) Complete the table : Name of ProcessInputsEquationOutputAmmoniaNitric acid+Air (c) What is the property of nitric acid which allows it to react with copper.

Answer»

(a) A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when reacts with copper. Identify B. Write equation with copper.

(b) Complete the table :

$\begin{matrix} Name of Process & Inputs & Equation & Output Ammonia & Nitric acid +Air \end{matrix}$

(c) What is the property of nitric acid which allows it to react with copper.

Discussion

8494.	13 How redox reactions shows vital role in non renewable energy sources?
Answer» 13 How redox reactions shows vital role in non renewable energy sources?

Discussion

8495.	(i) What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? (ii) Name the type of reaction.(iii) Write a balanced chemical equation to represent the above chemical reaction.
Answer» (i) What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? (ii) Name the type of reaction. (iii) Write a balanced chemical equation to represent the above chemical reaction.

Discussion

8496.	If x,p,q,y are in A.P, then the value of p/q=
Answer» If x,p,q,y are in A.P, then the value of p/q=

Discussion

8497.	The equivalent conductivity of a solution containing 2.54 g of CuSO4 per litre is 91.0 Ω−1 cm2 eq−1. Its conductivity would be :[Molar mass of CuSO4 is 159.6 g/mol]
Answer» The equivalent conductivity of a solution containing $2.54 g$ of $C u S O_{4}$ per litre is $91.0 Ω^{- 1} c m^{2} e q^{- 1}$ . Its conductivity would be : [Molar mass of $C u S O_{4}$ is $159.6 g / m o l$ ]

Discussion

8498.	The mutual heat of neutralisation of 40g NaOH and 60g CH3COOH will be
Answer» The mutual heat of neutralisation of 40g NaOH and 60g CH3COOH will be

Discussion

8499.	Which of the following will behave as a strong acid in aqueous solution?
Answer» Which of the following will behave as a strong acid in aqueous solution?

Discussion

8500.	H2(g)+V2O5(s)→V2O3(s)+H2O(l)Let the coefficients for the given reaction be as follows:AH2(g)+BV2O5(s)→CV2O3(s)+DH2O(l)What will be the equations for the number of atoms of each element, so that each is balanced?
Answer» $H_{2} (g) + V_{2} O_{5} (s) \to V_{2} O_{3} (s) + H_{2} O (l)$ Let the coefficients for the given reaction be as follows: $A H_{2} (g) + B V_{2} O_{5} (s) \to C V_{2} O_{3} (s) + D H_{2} O (l)$ What will be the equations for the number of atoms of each element, so that each is balanced?

Discussion

Explore topic-wise InterviewSolutions in .

What kind of waste can compost be made from- biodegradable or non-biodegradable?

11. rst__st_s_tt_ _rrst(1) rsttrr(2)rsrtrr(3) rrstst(4) srtrst

The elements P, Q and R are one of the Döbereiner's triad of elements in the increasing order of their atomic masses. If the atomic masses of P, Q and R are x, y and z respectively, then

Shape of XeOF4 is generally called : square pyramidal. But I think square bi-pyramidal as lone pair repels Xe-F bonds more significantly than that of Xe-O bond pair.

Base used in cooking examples

5g of metal oxide educed too 3.4g of the metal if the gram atomic mass of the metal is 51g\mol what is the formula of metal oxide

Name the constituents of: (a) Duralumin, (b) Solder, (c) Bronze, (d) Invar.

47. A gaseous reaction A2(g) -------> B(g) + 1/2C(g) Shows increase in pressure form 100mm to 120 mm in 5 minutes. The rates of disappearance of A2 and unit of gaseous reaction

Is every ionization energy(I.E. 1 st ,2nd or any ) equal to the negative (- )of elctron gain enthalpy ?

Some crops are suitable for growing in soil with acidic nature. Which salt can be added, in order to increase the acidic nature of the soil?

What pH values can a universal indicator detect?

Count the number of stereocentres in the molecule below:

If a is the length of the side of a cube the dis†an ce between the body centered atom and one corner atom in the cube will b

Which of the following has maximum standard reduction potential1) Li2) K3) F4) Cl

How is the concentration of hydronium ions (H3O+) affected when the solution of an acid is diluted ?

An ideal sort is an In-place sort whose additional space requirement is

Question 28Which of the following represents saponification reaction?(a) CH3COONa+NaOHCaO−−→CH4+Na2CO3(b) CH3COOH+C2H5OHH2SO4−−−−→CH3COOC2H5+H2O(c) 2CH3COOH+2Na→2CH3COONa+H2(d) CH3COOC2H5+NaOH→CH3COONa+C2H5OH

What is froth flotation ? Explain by giving examples . Can this be asked in board exam .

An example of a physical change is:

2. The amount of heat evolved when 0.50 mole of HCl is mixed with 0.30 mole of NaOH solution is

Molecular formula of naphthaquinoneis

Products obtained when Conc.HNO3 (Nitric acid ) is heated.

Write the IUPAC name of the following:(i) CH3CH2CH2CH2CH3(ii)(iii) CH3 CH2 CH=CH CH3(iv) CH3—C≡CH

The hybridizations of the atomic orbitals of nitrogen in NO−2,NO+2 and NH+4 respectively are,

1 mole of gas are present in a container and the rate of reaction is r1. If same mole is taken in another container having volume half of the first container then new rate becomes twice. Calculate order of reaction.

In a sample containing 3 hydrogen atoms excited to 4th orbit, the maximum and the minimum number of lines that will be obtained on de-excitation are respectively

For the following reaction, 2N2O5(g) → 4NO2(g)+O2(g) State the rate expression.

Which of the following is incorrect?

Complete the following reaction: CH3CH2OH + O2 → +H2O

Question 5.4Translate the following statement into chemical equation and then balance it:Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

Which of the following is most basic in a solution of carbon tetrachloride. (1)NH3. (2)CH3CH2NH2. (3)(CH3CH2)2NH. (4)(CH3CH2)3N

1 atom of an element weighs 1.792 ×10^-22 g. The atomic weight of element is

Ques:- The highest value of third ionization enthalpy among the following is a-Be b-B c-N d-F

How do acids and bases react with each other? What is the name of the process? What product is obtained out of this reaction?

Question 8In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?

Chloramphenicol is an

Question 7 Describe characteristics and uses of coke.

aFe+bO2→ cFe2O3 For the above equation to represent a balanced equation, ratio of a, b and c respectively should be?

13 How redox reactions shows vital role in non renewable energy sources?

(i) What is observed when a solution of potassium iodide solution is added to a solution of lead nitrate? (ii) Name the type of reaction.(iii) Write a balanced chemical equation to represent the above chemical reaction.

If x,p,q,y are in A.P, then the value of p/q=

The equivalent conductivity of a solution containing 2.54 g of CuSO4 per litre is 91.0 Ω−1 cm2 eq−1. Its conductivity would be :[Molar mass of CuSO4 is 159.6 g/mol]

The mutual heat of neutralisation of 40g NaOH and 60g CH3COOH will be

Which of the following will behave as a strong acid in aqueous solution?

H2(g)+V2O5(s)→V2O3(s)+H2O(l)Let the coefficients for the given reaction be as follows:AH2(g)+BV2O5(s)→CV2O3(s)+DH2O(l)What will be the equations for the number of atoms of each element, so that each is balanced?