15280 + Interview Questions in Chemistry Page 285 InterviewSolution

14201.	The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups because
Answer» The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups because

Discussion

14202.	About manufacturing of salts
Answer» About manufacturing of salts

Discussion

14203.	Explain extraction of metals.
Answer» Explain extraction of metals.

Discussion

14204.	When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process?
Answer» When the concentrated aqueous solution of substance X is electrolysed, then $N a O H, C l_{2} a n d H_{2}$ are produced. Name the substance X. What is the special name of this process?

Discussion

14205.	Aluminium is used in thermite welding: (a) What is thermit? (b) What is ignition mixture? (c) Write the reaction for this process?
Answer» Aluminium is used in thermite welding: (a) What is thermit? (b) What is ignition mixture? (c) Write the reaction for this process?

14205.

Aluminium is used in thermite welding: (a) What is thermit? (b) What is ignition mixture? (c) Write the reaction for this process?

Answer»

Aluminium is used in thermite welding:

(a) What is thermit?

(b) What is ignition mixture?

(c) Write the reaction for this process?

Discussion

14206.	Write the name and formula of the product formed in each case below: (a) C2H4+Cl2→......... (b) C2H5Br+KOH(alc.)Δ⟶......... (c) H2C=CH2alk.KMnO4−−−−−−−→......... (d) H2C=CH2+HBr→.......
Answer» Write the name and formula of the product formed in each case below: (a) $C_{2} H_{4} + C l_{2} \to . . . . . . . . .$ (b) $C_{2} H_{5} B r + K O H (a l c .) Δ ⟶ . . . . . . . . .$ (c) $H_{2} C = C H_{2} a l k . K M n O_{4} - ------ \to . . . . . . . . .$ (d) $H_{2} C = C H_{2} + H B r \to . . . . . . .$

Discussion

14207.	Calculate Molarity of a solution having 2.6×10−3 mole solute dissolved in 250 ml solution.
Answer» Calculate Molarity of a solution having $2.6 \times 10^{- 3}$ mole solute dissolved in 250 ml solution.

Discussion

14208.	Name the gas evolved when metals are made to react with dilute acids
Answer» Name the gas evolved when metals are made to react with dilute acids

Discussion

14209.	Why sodium is kept in keroscene
Answer» Why sodium is kept in keroscene

Discussion

14210.	What is the mean of Iupac and what is the use of it in chemistry? ? What is ph value and what does it mean ??how can we get that it is having 2ph value or what? ?
Answer» What is the mean of Iupac and what is the use of it in chemistry? ? What is ph value and what does it mean ??how can we get that it is having 2ph value or what? ?

Discussion

14211.	What is miccellls and 3 difference between soaps and detergents ?
Answer» What is miccellls and 3 difference between soaps and detergents ?

Discussion

14212.	Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation: P+5HNO3→H3PO4+5NO2+H2O If 6.2 g of phosphorus was used in the reaction, calculate: (a) The number of moles of phosphorus taken and mass of phosphoric acid formed. (b) Mass of nitric acid consumed at the same time. (c) The volume of steam produced at the same time if measured at 760 mm Hg pressure and 273∘C.
Answer» Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation: $P + 5 H N O_{3} \to H_{3} P O_{4} + 5 N O_{2} + H_{2} O$ If 6.2 g of phosphorus was used in the reaction, calculate: (a) The number of moles of phosphorus taken and mass of phosphoric acid formed. (b) Mass of nitric acid consumed at the same time. (c) The volume of steam produced at the same time if measured at 760 mm Hg pressure and $273^{\circ} C .$

14212.

Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation: P+5HNO3→H3PO4+5NO2+H2O If 6.2 g of phosphorus was used in the reaction, calculate: (a) The number of moles of phosphorus taken and mass of phosphoric acid formed. (b) Mass of nitric acid consumed at the same time. (c) The volume of steam produced at the same time if measured at 760 mm Hg pressure and 273∘C.

Answer»

Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation:
$P + 5 H N O_{3} \to H_{3} P O_{4} + 5 N O_{2} + H_{2} O$
If 6.2 g of phosphorus was used in the reaction, calculate:

(a) The number of moles of phosphorus taken and mass of phosphoric acid formed.
(b) Mass of nitric acid consumed at the same time.
(c) The volume of steam produced at the same time if measured at 760 mm Hg pressure and $273^{\circ} C .$

Discussion

14213.	What is the formulae of compound: 1) ferrous sulphate 2) sodium sulphate 3) magnesium hydrogen carbonate 4) cupric oxide 5) cuprous oxide 6) hydrogen peroxide 7) Sodium acetate 8) Lead Nitrate 9) sodium zincate
Answer» What is the formulae of compound: 1) ferrous sulphate 2) sodium sulphate 3) magnesium hydrogen carbonate 4) cupric oxide 5) cuprous oxide 6) hydrogen peroxide 7) Sodium acetate 8) Lead Nitrate 9) sodium zincate

14213.

What is the formulae of compound: 1) ferrous sulphate 2) sodium sulphate 3) magnesium hydrogen carbonate 4) cupric oxide 5) cuprous oxide 6) hydrogen peroxide 7) Sodium acetate 8) Lead Nitrate 9) sodium zincate

Answer»

What is the formulae of compound:

1) ferrous sulphate

2) sodium sulphate

3) magnesium hydrogen carbonate

4) cupric oxide

5) cuprous oxide

6) hydrogen peroxide

7) Sodium acetate

8) Lead Nitrate

9) sodium zincate

Discussion

14214.	Why are the hydrocarbons distinguished as saturated and unsaturated
Answer» Why are the hydrocarbons distinguished as saturated and unsaturated

Discussion

14215.	(a) Why is an iron grill painted frequently? (b) Explain why though aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.
Answer» (a) Why is an iron grill painted frequently? (b) Explain why though aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.

Discussion

14216.	Question 8.2 Write the balanced chemical equation for the following and identify the type of reaction: Zinc carbonate (s) → Zinc oxide (s) + Carbon dioxide (g)
Answer» Question 8.2 Write the balanced chemical equation for the following and identify the type of reaction: Zinc carbonate (s) $\to$ Zinc oxide (s) + Carbon dioxide (g)

Discussion

14217.	When HNO3 is mixed with an unknown solution 'X', sodium nitrate is produced. Name the unknown substance X. HNO3 + X NaNO3 + H2O
Answer» When HNO₃ is mixed with an unknown solution 'X', sodium nitrate is produced. Name the unknown substance X. HNO₃ + X NaNO₃+ H₂O

Discussion

14218.	Which of the following metals is refined by electrolytic refining?
Answer» Which of the following metals is refined by electrolytic refining?

Discussion

14219.	Which of the following is/ are the correct graphical representation of Boyle's Law?
Answer» Which of the following is/ are the correct graphical representation of Boyle's Law?

Discussion

14220.	What is the chemical formula of ozone?
Answer» What is the chemical formula of ozone?

Discussion

14221.	What is the reading of Ammeter if emf of the battery is 12V and internal resistance is 2W when i) K1 is closed ii) K2 is closed
Answer» What is the reading of Ammeter if emf of the battery is 12V and internal resistance is 2W when i) K₁ is closed ii) K₂ is closed

14221.

What is the reading of Ammeter if emf of the battery is 12V and internal resistance is 2W when i) K1 is closed ii) K2 is closed

Answer»

What is the reading of Ammeter if emf of the battery is 12V and internal resistance is 2W when

i) K₁ is closed

ii) K₂ is closed

Discussion

14222.	What is homologous series? Explain with an example.
Answer» What is homologous series? Explain with an example.

Discussion

14223.	What is the name given to the salts of : (a) sulphurous acid, (b) sulphuric acid ?
Answer» What is the name given to the salts of : (a) sulphurous acid, (b) sulphuric acid ?

14223.

What is the name given to the salts of : (a) sulphurous acid, (b) sulphuric acid ?

Answer»

What is the name given to the salts of :

(a) sulphurous acid, (b) sulphuric acid ?

Discussion

14224.	State the position of the following in the Periodic Table: [4 MARKS] (a) Alkali metals (b) Alkaline earth metals (c) Iron and zinc (d) Aluminium
Answer» State the position of the following in the Periodic Table: [4 MARKS] (a) Alkali metals (b) Alkaline earth metals (c) Iron and zinc (d) Aluminium

Discussion

14225.	PbO2 + 2NaOH → ______ + H2O
Answer» $P b O_{2} + 2 N a O H \to$ ______ $+ H_{2} O$

Discussion

14226.	Match the following aromatic compounds with the alkanes that underwent aromatisation to form these.
Answer» Match the following aromatic compounds with the alkanes that underwent aromatisation to form these.

Discussion

14227.	Which of the following contains maximum number of lone pairs of electrons on the central atom?
Answer» Which of the following contains maximum number of lone pairs of electrons on the central atom?

Discussion

14228.	What will happen to the pH of a solution if some HCl is added to it?
Answer» What will happen to the pH of a solution if some HCl is added to it?

Discussion

14229.	What factors adds value to metal like gold and silver which make them expensive
Answer» What factors adds value to metal like gold and silver which make them expensive

Discussion

14230.	X and Y in the below reaction, respectively could be:
Answer» X and Y in the below reaction, respectively could be:

14230.

X and Y in the below reaction, respectively could be:

Answer»

X and Y in the below reaction, respectively could be:

Discussion

14231.	Carnallite is the mineral of
Answer» Carnallite is the mineral of

Discussion

14232.	The number of moles in 52g of He is equal to_________
Answer» The number of moles in 52g of He is equal to_________

Discussion

14233.	In which of the following equations we can say that mass is conserved?
Answer» In which of the following equations we can say that mass is conserved?

Discussion

14234.	Question 2 (ii) Write equation for the reaction of calcium and potassium with water.
Answer» Question 2 (ii) Write equation for the reaction of calcium and potassium with water.

Discussion

14235.	Sulphide ores are common for the metals:
Answer» Sulphide ores are common for the metals:

Discussion

14236.	What would be the product if a compound containing carbon is burnt?
Answer» What would be the product if a compound containing carbon is burnt?

Discussion

14237.	Formation of Nh4Cl from NH3 and HCl is a synthesis reaction.comment on the statement.
Answer» Formation of Nh4Cl from NH3 and HCl is a synthesis reaction.comment on the statement.

Discussion

14238.	The metals that will not displace hydrogen on reaction with dilute acids are
Answer» The metals that will not displace hydrogen on reaction with dilute acids are

Discussion

14239.	Ba(OH)2 + 2NH4Cl ---------> BaCl2 + 2NH4OH Is the above-mentioned chemical reaction correct?
Answer» Ba(OH)₂ + 2NH₄Cl ---------> BaCl₂ + 2NH₄OH Is the above-mentioned chemical reaction correct?

14239.

Ba(OH)2 + 2NH4Cl ---------> BaCl2 + 2NH4OH Is the above-mentioned chemical reaction correct?

Answer»

Ba(OH)₂ + 2NH₄Cl ---------> BaCl₂ + 2NH₄OH

Is the above-mentioned chemical reaction correct?

Discussion

14240.	Na2ZnO2 is which type of bond? Why do two metal react?
Answer» Na₂ZnO₂ is which type of bond? Why do two metal react?

Discussion

14241.	what is the difference between atomic mass and mass number of an atom?
Answer» what is the difference between atomic mass and mass number of an atom?

Discussion

14242.	KMnO4 decomposes on heating according to the equation- 2KMnO4→K2MnO4+MnO2+O2 On heating KMnO4, 1 litre of oxygen was collected at room temperature and it was found that the test tube had undergone a loss in mass of 1.32 g. If one litre of hydrogen under the same conditions of temperature and pressure has a mass of 0.0825 g. Calculate the relative molecular mass of oxygen.
Answer» $K M n O_{4}$ decomposes on heating according to the equation- $2 K M n O_{4} \to K_{2} M n O_{4} + M n O_{2} + O_{2}$ On heating $K M n O_{4}$ , 1 litre of oxygen was collected at room temperature and it was found that the test tube had undergone a loss in mass of 1.32 g. If one litre of hydrogen under the same conditions of temperature and pressure has a mass of 0.0825 g. Calculate the relative molecular mass of oxygen.

14242.

KMnO4 decomposes on heating according to the equation- 2KMnO4→K2MnO4+MnO2+O2 On heating KMnO4, 1 litre of oxygen was collected at room temperature and it was found that the test tube had undergone a loss in mass of 1.32 g. If one litre of hydrogen under the same conditions of temperature and pressure has a mass of 0.0825 g. Calculate the relative molecular mass of oxygen.

Answer»

$K M n O_{4}$ decomposes on heating according to the equation-

$2 K M n O_{4} \to K_{2} M n O_{4} + M n O_{2} + O_{2}$

On heating $K M n O_{4}$ , 1 litre of oxygen was collected at room temperature and it was found that the test tube had undergone a loss in mass of 1.32 g. If one litre of hydrogen under the same conditions of temperature and pressure has a mass of 0.0825 g. Calculate the relative molecular mass of oxygen.

Discussion

14243.	The molecular mass of carbon dioxide is 44 g. The volume of 132 g of carbon dioxide at STP is
Answer» The molecular mass of carbon dioxide is 44 g. The volume of 132 g of carbon dioxide at STP is

Discussion

14244.	What is $CaSO_4.2H_2O$ also known as?
Answer» What is $CaSO_4_.2H_2O$ also known as?

Discussion

14245.	What is pH and what is it's relation with pOH?
Answer» What is pH and what is it's relation with pOH?

Discussion

14246.	The metal which does not react with cold as well as hot water but, reacts with steam is
Answer» The metal which does not react with cold as well as hot water but, reacts with steam is

Discussion

14247.	Write the equation for dissociation of hydrochloric acid (HCl) in water?
Answer» Write the equation for dissociation of hydrochloric acid (HCl) in water?

Discussion

14248.	Number of molecules in 22.4 L water at S.T.P. are:
Answer» Number of molecules in 22.4 L water at S.T.P. are:

Discussion

14249.	An example of combination reaction between an element and compound is:
Answer» An example of combination reaction between an element and compound is:

Discussion

14250.	What is meant by (a) displacement reaction, and (b) double displacement reaction ? explain with the help of one example each.
Answer» What is meant by (a) displacement reaction, and (b) double displacement reaction ? explain with the help of one example each.

Discussion

14244.	What is \(CaSO_4.2H_2O\) also known as?
Answer» What is \(CaSO_4_.2H_2O\) also known as?

Explore topic-wise InterviewSolutions in .

The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups because

About manufacturing of salts

Explain extraction of metals.

When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process?

Aluminium is used in thermite welding: (a) What is thermit? (b) What is ignition mixture? (c) Write the reaction for this process?

Write the name and formula of the product formed in each case below: (a) C2H4+Cl2→......... (b) C2H5Br+KOH(alc.)Δ⟶......... (c) H2C=CH2alk.KMnO4−−−−−−−→......... (d) H2C=CH2+HBr→.......

Calculate Molarity of a solution having 2.6×10−3 mole solute dissolved in 250 ml solution.

Name the gas evolved when metals are made to react with dilute acids

Why sodium is kept in keroscene

What is the mean of Iupac and what is the use of it in chemistry? ? What is ph value and what does it mean ??how can we get that it is having 2ph value or what? ?

What is miccellls and 3 difference between soaps and detergents ?

What is the formulae of compound: 1) ferrous sulphate 2) sodium sulphate 3) magnesium hydrogen carbonate 4) cupric oxide 5) cuprous oxide 6) hydrogen peroxide 7) Sodium acetate 8) Lead Nitrate 9) sodium zincate

Why are the hydrocarbons distinguished as saturated and unsaturated

(a) Why is an iron grill painted frequently? (b) Explain why though aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.

Question 8.2 Write the balanced chemical equation for the following and identify the type of reaction: Zinc carbonate (s) → Zinc oxide (s) + Carbon dioxide (g)

When HNO3 is mixed with an unknown solution 'X', sodium nitrate is produced. Name the unknown substance X. HNO3 + X NaNO3 + H2O

Which of the following metals is refined by electrolytic refining?

Which of the following is/ are the correct graphical representation of Boyle's Law?

What is the chemical formula of ozone?

What is the reading of Ammeter if emf of the battery is 12V and internal resistance is 2W when i) K1 is closed ii) K2 is closed

What is homologous series? Explain with an example.

What is the name given to the salts of : (a) sulphurous acid, (b) sulphuric acid ?

State the position of the following in the Periodic Table: [4 MARKS] (a) Alkali metals (b) Alkaline earth metals (c) Iron and zinc (d) Aluminium

PbO2 + 2NaOH → ______ + H2O

Match the following aromatic compounds with the alkanes that underwent aromatisation to form these.

Which of the following contains maximum number of lone pairs of electrons on the central atom?

What will happen to the pH of a solution if some HCl is added to it?

What factors adds value to metal like gold and silver which make them expensive

X and Y in the below reaction, respectively could be:

Carnallite is the mineral of

The number of moles in 52g of He is equal to_________

In which of the following equations we can say that mass is conserved?

Question 2 (ii) Write equation for the reaction of calcium and potassium with water.

Sulphide ores are common for the metals:

What would be the product if a compound containing carbon is burnt?

Formation of Nh4Cl from NH3 and HCl is a synthesis reaction.comment on the statement.

The metals that will not displace hydrogen on reaction with dilute acids are

Ba(OH)2 + 2NH4Cl ---------&gt; BaCl2 + 2NH4OH Is the above-mentioned chemical reaction correct?

Na2ZnO2 is which type of bond? Why do two metal react?

what is the difference between atomic mass and mass number of an atom?

The molecular mass of carbon dioxide is 44 g. The volume of 132 g of carbon dioxide at STP is

What is \(CaSO_4.2H_2O\) also known as?

What is pH and what is it's relation with pOH?

The metal which does not react with cold as well as hot water but, reacts with steam is

Write the equation for dissociation of hydrochloric acid (HCl) in water?

Number of molecules in 22.4 L water at S.T.P. are:

An example of combination reaction between an element and compound is:

What is meant by (a) displacement reaction, and (b) double displacement reaction ? explain with the help of one example each.

Ba(OH)2 + 2NH4Cl ---------> BaCl2 + 2NH4OH Is the above-mentioned chemical reaction correct?