15280 + Interview Questions in Chemistry Page 29 InterviewSolution

1401.	Explain the following:(i) Galvanisation protects iron from rusting.(ii) Stainless steel is more useful than steel.(iii) Aluminium is extensively used for making aircraft parts.(iv) Hot water has no action on aluminium.
Answer» Explain the following: (i) Galvanisation protects iron from rusting. (ii) Stainless steel is more useful than steel. (iii) Aluminium is extensively used for making aircraft parts. (iv) Hot water has no action on aluminium.

Discussion

1402.	Which of the following statements is not correct about the trends when going from left to right across the periodic table?
Answer» Which of the following statements is not correct about the trends when going from left to right across the periodic table?

Discussion

1403.	How to convert Benzyl chloride to benzyl alchol .If we do it by using al.KOH will it not be called elimination reaction?
Answer» How to convert Benzyl chloride to benzyl alchol .If we do it by using al.KOH will it not be called elimination reaction?

Discussion

1404.	Is glassy bead mixture of NaBO2 and B2O3? Or only Boric Anhydride (B2O3) ?
Answer» Is glassy bead mixture of NaBO2 and B2O3? Or only Boric Anhydride (B2O3) ?

Discussion

1405.	a solution of NaOH has 0.04 g of it in 1 litre water what is its ph
Answer» a solution of NaOH has 0.04 g of it in 1 litre water what is its ph

Discussion

1406.	In reactionSO2 + H2S → 2H2O + 3Sthe reducing agent is –
Answer» In reaction $S O_{2}$ + $H_{2} S$ $\to$ $2 H_{2} O$ + $3 S$ the reducing agent is –

1406.

In reactionSO2 + H2S → 2H2O + 3Sthe reducing agent is –

Answer»

In reaction

$S O_{2}$ + $H_{2} S$ $\to$ $2 H_{2} O$ + $3 S$

the reducing agent is –

Discussion

1407.	Difference between food chain and food web.
Answer» Difference between food chain and food web.

Discussion

1408.	(a) Define atomicity of a gas.(b) Differentiate between 2H and H2.
Answer» (a) Define atomicity of a gas. (b) Differentiate between 2H and H₂.

Discussion

1409.	If 'x' gm of NaCHC2O4 require for neutrite 100ml of 0.2M NaOH and 'y' gm of NaHC2O4required to reduce 100ml of 0.02M KMno4 in acidic medium.calculate x and y relation.
Answer» If 'x' gm of NaCHC2O4 require for neutrite 100ml of 0.2M NaOH and 'y' gm of NaHC2O4required to reduce 100ml of 0.02M KMno4 in acidic medium.calculate x and y relation.

Discussion

1410.	41.why ionisation energy or titatnium is greater than vanadium whereas the nuclear charge on vanadium is more than titanium
Answer» 41.why ionisation energy or titatnium is greater than vanadium whereas the nuclear charge on vanadium is more than titanium

Discussion

1411.	Why HCl gas is unable to change the colour of a dry blue litmus paper ? What happens if the paper is moistened ?
Answer» Why HCl gas is unable to change the colour of a dry blue litmus paper ? What happens if the paper is moistened ?

Discussion

1412.	can the electromagnetic waves be seen or felt as gravity\lbrack eg.all things fall down\rbrack?
Answer» can the electromagnetic waves be seen or felt as gravity\lbrack eg.all things fall down\rbrack?

Discussion

1413.	What are the sources for alkynes? Give the general formula of alkynes.
Answer» What are the sources for alkynes? Give the general formula of alkynes.

Discussion

1414.	Do we use atomic mass to calculate molecular mass?
Answer» Do we use atomic mass to calculate molecular mass?

Discussion

1415.	How to find the bond order of CN
Answer» How to find the bond order of CN

Discussion

1416.	Write the physical properties of ethene.
Answer» Write the physical properties of ethene.

Discussion

1417.	what is the formula for calculating oxidation state? and how to do those sums if asked?
Answer» what is the formula for calculating oxidation state? and how to do those sums if asked?

Discussion

1418.	in benzene the bond continuosly changes as it is a resonatic structure. The speed of change is so fast that the bond change looks like a round. then how were the scientists able to make the structure
Answer» in benzene the bond continuosly changes as it is a resonatic structure. The speed of change is so fast that the bond change looks like a round. then how were the scientists able to make the structure

Discussion

1419.	31. What is the pH of salt of strong acid and weak base?
Answer» 31. What is the pH of salt of strong acid and weak base?

Discussion

1420.	Hydrochloric acid is produced in the stomach which helps in the digestion of food. pH of distilled water is:
Answer» Hydrochloric acid is produced in the stomach which helps in the digestion of food. pH of distilled water is:

1420.

Hydrochloric acid is produced in the stomach which helps in the digestion of food. pH of distilled water is:

Answer»

Hydrochloric acid is produced in the stomach which helps in the digestion of food.

pH of distilled water is:

Discussion

1421.	The statement that is true for the long form of the periodic table is:
Answer» The statement that is true for the long form of the periodic table is:

Discussion

1422.	the difference in energies between 2nd and 3rd orbit of He^+ion will be
Answer» the difference in energies between 2nd and 3rd orbit of He^+ion will be

Discussion

1423.	How does soap act when we wash ourselves or our soiled clothes?
Answer» How does soap act when we wash ourselves or our soiled clothes?

Discussion

1424.	17. What is hybridization in butane?
Answer» 17. What is hybridization in butane?

Discussion

1425.	When NaHCO3 is heated , + CO2+H2O is obtained.
Answer» When ${NaHCO}_{3}$ is heated , + ${CO}_{2} + H_{2} O$ is obtained.

Discussion

1426.	Choose the correct answer:Ammonia can be obtained by adding water to:(a) Ammonium chloride(b) Ammonium nitrite(c) Magnesium nitride(d) Magnesium nitrate
Answer» Choose the correct answer: Ammonia can be obtained by adding water to: (a) Ammonium chloride (b) Ammonium nitrite (c) Magnesium nitride (d) Magnesium nitrate

Discussion

1427.	32. The amount of zinc required to produce 224 ml of H2 at STP on treatment with dilute H2SO4 will be what?
Answer» 32. The amount of zinc required to produce 224 ml of H2 at STP on treatment with dilute H2SO4 will be what?

Discussion

1428.	(a) Compound X consists of molecules.Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below:(i) The type of bonding in X will be:(a) ionic(b) electrovalent(c) covalent(d) molecular(ii) X is likely to have a:(a) low melting point and high boiling point(b) high melting point and low boiling point(c) low melting point and low boiling point(d) high milting point and high boiling point(iii) In the liquid state, X will:(a) become ionic(b) be an electrolyte(c) conduct electricity(d) not conduct electricity(b) (i) Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.(ii) Explain, why carbon tetrachloride does not dissolve in water?(iii) Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in?(iv) Can Q and S, both be metals? Justify your answer.
Answer» (a) Compound X consists of molecules. Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below: (i) The type of bonding in X will be: (a) ionic (b) electrovalent (c) covalent (d) molecular (ii) X is likely to have a: (a) low melting point and high boiling point (b) high melting point and low boiling point (c) low melting point and low boiling point (d) high milting point and high boiling point (iii) In the liquid state, X will: (a) become ionic (b) be an electrolyte (c) conduct electricity (d) not conduct electricity (b) (i) Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions. (ii) Explain, why carbon tetrachloride does not dissolve in water? (iii) Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in? (iv) Can Q and S, both be metals? Justify your answer.

Discussion

1429.	Choose the correct option regarding chlor-alkali reaction:
Answer» Choose the correct option regarding chlor-alkali reaction:

Discussion

1430.	what is the difference between binding energy and Q value ? and why there is mass defect during radioactive decay ?
Answer» what is the difference between binding energy and Q value ? and why there is mass defect during radioactive decay ?

Discussion

1431.	What is meant by water of crystallisation in a substance? How would you show that blue copper sulphate crystals contain water of crystallisation?
Answer» What is meant by water of crystallisation in a substance? How would you show that blue copper sulphate crystals contain water of crystallisation?

Discussion

1432.	List out the main applications of electrolysis.
Answer» List out the main applications of electrolysis.

Discussion

1433.	4. The incorrect statement is 1. Ethylene has degree of unsaturation equal to 1 2. Rate of nitration of C6H6 and C6D6 is same 3. Nodal plane of pi bond of ethylene is a plane perpendicular to its molecular plane 4. C-C bond length is longer than C-H bond length
Answer» 4. The incorrect statement is 1. Ethylene has degree of unsaturation equal to 1 2. Rate of nitration of C6H6 and C6D6 is same 3. Nodal plane of pi bond of ethylene is a plane perpendicular to its molecular plane 4. C-C bond length is longer than C-H bond length

Discussion

1434.	Explain the terms:(a) Gram atom(b) Gram mole(c) Mole
Answer» Explain the terms: (a) Gram atom (b) Gram mole (c) Mole

Discussion

1435.	A+2B+3C→ AB2C3. Reaction of 6g of A ,6×10\overset{23}{} atom of B, 0.036 mol of C yields 4.8g of compound AB2C3. If the atomic mass A and C are 60 and 80 respectively. The atomic mass of B is
Answer» A+2B+3C→ AB2C3. Reaction of 6g of A ,6×10\overset{23}{} atom of B, 0.036 mol of C yields 4.8g of compound AB2C3. If the atomic mass A and C are 60 and 80 respectively. The atomic mass of B is

Discussion

1436.	Plants, animals, microbes, weather, soil and water are all components of a/an ___
Answer» Plants, animals, microbes, weather, soil and water are all components of a/an ___

Discussion

1437.	For a molecule to show inversion, is it necessary to be chiral? Please explain.
Answer» For a molecule to show inversion, is it necessary to be chiral? Please explain.

Discussion

1438.	The number of carbon atoms present in a signature, if a signature written by carbon pencil weights 1.2×10−3g is
Answer» The number of carbon atoms present in a signature, if a signature written by carbon pencil weights $1.2 \times 10^{- 3} g$ is

Discussion

1439.	Conversion of diamond to graphite is (1) spon†an eous only at high temperature (2) Spon†an eous only at low temperature (3) Always non-spon†an eous (4) Always spon†an eous
Answer» Conversion of diamond to graphite is (1) spon†an eous only at high temperature (2) Spon†an eous only at low temperature (3) Always non-spon†an eous (4) Always spon†an eous

Discussion

1440.	Q.Acid + Metal ----> Salt + Hydrogen gas. Then why does copper reaction with sulphuric acid to produce copper sulphate, sulphur dioxide and water does not produce hydrogen gas on products side i.e R.H.S ?
Answer» Q.Acid + Metal ----> Salt + Hydrogen gas. Then why does copper reaction with sulphuric acid to produce copper sulphate, sulphur dioxide and water does not produce hydrogen gas on products side i.e R.H.S ?

Discussion

1441.	Heating of sulphide ores in the presence of oxygen is termed as ___
Answer» Heating of sulphide ores in the presence of oxygen is termed as ___

Discussion

1442.	What is electroplating? Explain.
Answer» What is electroplating? Explain.

Discussion

1443.	Which of the following amines will not react with Hinsberg's reagent?
Answer» Which of the following amines will not react with Hinsberg's reagent?

Discussion

1444.	The normality of 10%(weight/volume) acetic is??
Answer» The normality of 10%(weight/volume) acetic is??

Discussion

1445.	The preparation of lead sulphate from lead carbonate is a two-step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate.)(i) What is the first step that is required to prepare lead sulphate from lead carbonate?(ii) Write the equation for the reaction that will take place when this first step is carried out.(iii) Why is the direct addition of dilute sulphuric acid to lead carbonate an impractical method of preparing lead sulphate?
Answer» The preparation of lead sulphate from lead carbonate is a two-step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate.) (i) What is the first step that is required to prepare lead sulphate from lead carbonate? (ii) Write the equation for the reaction that will take place when this first step is carried out. (iii) Why is the direct addition of dilute sulphuric acid to lead carbonate an impractical method of preparing lead sulphate?

Discussion

1446.	(a) What are alcohols? State their sources. (b) Give general formula of monohydric alcohol [2 MARKS]
Answer» (a) What are alcohols? State their sources. (b) Give general formula of monohydric alcohol [2 MARKS]

Discussion

1447.	What is the use of jagged line in histogram
Answer» What is the use of jagged line in histogram

Discussion

1448.	Which is the hardest allotrope of carbon?
Answer» Which is the hardest allotrope of carbon?

Discussion

1449.	A food chain occurring in the sea which provides food for many people can be written as phytoplankton→zooplankton→X→Y (a) Name one phytoplankton. (b) Name two zooplankton. (c) What could be X? (d) Name the organism which Y could be. (e) Which organism in the above food chain is an(i) primary consumer, and (ii) tertiary consumer?
Answer» A food chain occurring in the sea which provides food for many people can be written as $p h y t o p l a n k t o n \to z o o p l a n k t o n \to X \to Y$ (a) Name one phytoplankton. (b) Name two zooplankton. (c) What could be X? (d) Name the organism which Y could be. (e) Which organism in the above food chain is an(i) primary consumer, and (ii) tertiary consumer?

1449.

A food chain occurring in the sea which provides food for many people can be written as phytoplankton→zooplankton→X→Y (a) Name one phytoplankton. (b) Name two zooplankton. (c) What could be X? (d) Name the organism which Y could be. (e) Which organism in the above food chain is an(i) primary consumer, and (ii) tertiary consumer?

Answer»

A food chain occurring in the sea which provides food for many people can be written as $p h y t o p l a n k t o n \to z o o p l a n k t o n \to X \to Y$

(a) Name one phytoplankton.

(b) Name two zooplankton.

(c) What could be X?

(d) Name the organism which Y could be.

(e) Which organism in the above food chain is an(i) primary consumer, and (ii) tertiary consumer?

Discussion

1450.	30. Calculate the amount of CO2 that will produce. 1)For 1 mole of C is burnt in 16 g of O2 and 2)For 2 mole of C is burnt in 16 g of O2
Answer» 30. Calculate the amount of CO2 that will produce. 1)For 1 mole of C is burnt in 16 g of O2 and 2)For 2 mole of C is burnt in 16 g of O2

Discussion

Explore topic-wise InterviewSolutions in .

Explain the following:(i) Galvanisation protects iron from rusting.(ii) Stainless steel is more useful than steel.(iii) Aluminium is extensively used for making aircraft parts.(iv) Hot water has no action on aluminium.

Which of the following statements is not correct about the trends when going from left to right across the periodic table?

How to convert Benzyl chloride to benzyl alchol .If we do it by using al.KOH will it not be called elimination reaction?

Is glassy bead mixture of NaBO2 and B2O3? Or only Boric Anhydride (B2O3) ?

a solution of NaOH has 0.04 g of it in 1 litre water what is its ph

In reactionSO2 + H2S → 2H2O + 3Sthe reducing agent is –

Difference between food chain and food web.

(a) Define atomicity of a gas.(b) Differentiate between 2H and H2.

If 'x' gm of NaCHC2O4 require for neutrite 100ml of 0.2M NaOH and 'y' gm of NaHC2O4required to reduce 100ml of 0.02M KMno4 in acidic medium.calculate x and y relation.

41.why ionisation energy or titatnium is greater than vanadium whereas the nuclear charge on vanadium is more than titanium

Why HCl gas is unable to change the colour of a dry blue litmus paper ? What happens if the paper is moistened ?

can the electromagnetic waves be seen or felt as gravity\lbrack eg.all things fall down\rbrack?

What are the sources for alkynes? Give the general formula of alkynes.

Do we use atomic mass to calculate molecular mass?

How to find the bond order of CN

Write the physical properties of ethene.

what is the formula for calculating oxidation state? and how to do those sums if asked?

in benzene the bond continuosly changes as it is a resonatic structure. The speed of change is so fast that the bond change looks like a round. then how were the scientists able to make the structure

31. What is the pH of salt of strong acid and weak base?

Hydrochloric acid is produced in the stomach which helps in the digestion of food. pH of distilled water is:

The statement that is true for the long form of the periodic table is:

the difference in energies between 2nd and 3rd orbit of He^+ion will be

How does soap act when we wash ourselves or our soiled clothes?

17. What is hybridization in butane?

When NaHCO3 is heated , + CO2+H2O is obtained.

Choose the correct answer:Ammonia can be obtained by adding water to:(a) Ammonium chloride(b) Ammonium nitrite(c) Magnesium nitride(d) Magnesium nitrate

32. The amount of zinc required to produce 224 ml of H2 at STP on treatment with dilute H2SO4 will be what?

Choose the correct option regarding chlor-alkali reaction:

what is the difference between binding energy and Q value ? and why there is mass defect during radioactive decay ?

What is meant by water of crystallisation in a substance? How would you show that blue copper sulphate crystals contain water of crystallisation?

List out the main applications of electrolysis.

4. The incorrect statement is 1. Ethylene has degree of unsaturation equal to 1 2. Rate of nitration of C6H6 and C6D6 is same 3. Nodal plane of pi bond of ethylene is a plane perpendicular to its molecular plane 4. C-C bond length is longer than C-H bond length

Explain the terms:(a) Gram atom(b) Gram mole(c) Mole

A+2B+3C→ AB2C3. Reaction of 6g of A ,6×10\overset{23}{} atom of B, 0.036 mol of C yields 4.8g of compound AB2C3. If the atomic mass A and C are 60 and 80 respectively. The atomic mass of B is

Plants, animals, microbes, weather, soil and water are all components of a/an ___

For a molecule to show inversion, is it necessary to be chiral? Please explain.

The number of carbon atoms present in a signature, if a signature written by carbon pencil weights 1.2×10−3g is

Conversion of diamond to graphite is (1) spon†an eous only at high temperature (2) Spon†an eous only at low temperature (3) Always non-spon†an eous (4) Always spon†an eous

Q.Acid + Metal ----> Salt + Hydrogen gas. Then why does copper reaction with sulphuric acid to produce copper sulphate, sulphur dioxide and water does not produce hydrogen gas on products side i.e R.H.S ?

Heating of sulphide ores in the presence of oxygen is termed as ___

What is electroplating? Explain.

Which of the following amines will not react with Hinsberg's reagent?

The normality of 10%(weight/volume) acetic is??

(a) What are alcohols? State their sources. (b) Give general formula of monohydric alcohol [2 MARKS]

What is the use of jagged line in histogram

Which is the hardest allotrope of carbon?

30. Calculate the amount of CO2 that will produce. 1)For 1 mole of C is burnt in 16 g of O2 and 2)For 2 mole of C is burnt in 16 g of O2