15280 + Interview Questions in Chemistry Page 294 InterviewSolution

14651.	What is the state of fire?
Answer» What is the state of fire?

Discussion

14652.	How will you test for a gas which is liberated when hydrochloric acid reacts with an active metal?
Answer» How will you test for a gas which is liberated when hydrochloric acid reacts with an active metal?

Discussion

14653.	CO2+H20 gives C6H12O6+O2+H2O How to balance this equation as per short cut method taught in byju's class session
Answer» CO2+H20 gives C6H12O6+O2+H2O How to balance this equation as per short cut method taught in byju's class session

14653.

CO2+H20 gives C6H12O6+O2+H2O How to balance this equation as per short cut method taught in byju's class session

Answer»

CO2+H20 gives C6H12O6+O2+H2O

How to balance this equation as per short cut method taught in byju's class session

Discussion

14654.	Do basic solutions also have H+ (aq) ions? If yes, then why are these basic?
Answer» Do basic solutions also have H⁺ (aq) ions? If yes, then why are these basic?

Discussion

14655.	How do H+ ions exist in water
Answer» How do $H^{+}$ ions exist in water

Discussion

14656.	Correct and balance the following reactions : (a) Ca + H2 ⟶ CaOH + H (b) N + H ⟶ NH3
Answer» Correct and balance the following reactions : (a) Ca + $H_{2}$ $⟶$ CaOH + H (b) N + H $⟶$ $N H_{3}$

14656.

Correct and balance the following reactions : (a) Ca + H2 ⟶ CaOH + H (b) N + H ⟶ NH3

Answer»

Correct and balance the following reactions :

(a) Ca + $H_{2}$ $⟶$ CaOH + H

(b) N + H $⟶$ $N H_{3}$

Discussion

14657.	The angle between sp2 hybrid orbitals is
Answer» The angle between $s p^{2}$ hybrid orbitals is

Discussion

14658.	An electron moves in a circular orbit at some distance from a proton with kinetic energy E.To escape to infinity, the energy which must be supplied to the electron is
Answer» An electron moves in a circular orbit at some distance from a proton with kinetic energy E.To escape to infinity, the energy which must be supplied to the electron is

Discussion

14659.	Why does gold and silver do not corrode?
Answer» Why does gold and silver do not corrode?

Discussion

14660.	How is the rate of a chemical reaction affected by change in concentration of the reactants? Give an example in support of your answer.
Answer» How is the rate of a chemical reaction affected by change in concentration of the reactants? Give an example in support of your answer.

Discussion

14661.	why is tincture of iodine applied on wound
Answer» why is tincture of iodine applied on wound

Discussion

14662.	If Ac of NH4OH is 11.5 W-1cm2 mol-1 and Acat infinite dilution of NH4OH is 0.4876 W-1cm2 mol-1, its degree of dissociation is:
Answer» If A_c of NH₄OH is 11.5 W^-1cm² mol^-1 andA_cat infinite dilution of NH₄OH is 0.4876 W^-1cm² mol^-1, its degree of dissociation is:

Discussion

14663.	What is the chemical formula of slaked lime?
Answer» What is the chemical formula of slaked lime?

Discussion

14664.	From the equation.: C + 2H2SO4 → CO2 + 2H2O +2SO2 Calculate: The volume of sulphur dioxide measured at STP, liberated at the same time. (Volume occupied by 1 mole of a gas at STP is 224 dm3)
Answer» From the equation.: C + 2H₂SO₄ → CO₂+ 2H₂O +2SO₂ Calculate: The volume of sulphur dioxide measured at STP, liberated at the same time. (Volume occupied by 1 mole of a gas at STP is 224 dm³)

14664.

From the equation.: C + 2H2SO4 → CO2 + 2H2O +2SO2 Calculate: The volume of sulphur dioxide measured at STP, liberated at the same time. (Volume occupied by 1 mole of a gas at STP is 224 dm3)

Answer»

From the equation.:

C + 2H₂SO₄ → CO₂+ 2H₂O +2SO₂

Calculate:

The volume of sulphur dioxide measured at STP, liberated at the same time.

(Volume occupied by 1 mole of a gas at STP is 224 dm³)

Discussion

14665.	Explain why [4 MARKS] (a) Only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate. (b) Nitric acid, when kept in a reagent bottle for a long time, turns yellow.
Answer» Explain why [4 MARKS] (a) Only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate. (b) Nitric acid, when kept in a reagent bottle for a long time, turns yellow.

Discussion

14666.	(a) What is a covalent bond? What type of bond exists in (i) CCl4, and (ii) CaCl2? (b) What is an ionic bond ? What type of bnd is present in oxygen molecule?
Answer» (a) What is a covalent bond? What type of bond exists in (i) $C C l_{4}$ , and (ii) $C a C l_{2}$ ? (b) What is an ionic bond ? What type of bnd is present in oxygen molecule?

Discussion

14667.	An important ore of zinc metal is : (a) calamine (b) cuprite (c) pyrolusite (d) haematite
Answer» An important ore of zinc metal is : (a) calamine (b) cuprite (c) pyrolusite (d) haematite

Discussion

14668.	In copper refining process the anode is ___
Answer» In copper refining process the anode is ___

Discussion

14669.	Explain how the activity series accounts for each of the following: (a) occurrence of metals, (b) tendency to corrosion, (c) reaction with water, (d) reaction with acids.
Answer» Explain how the activity series accounts for each of the following: (a) occurrence of metals, (b) tendency to corrosion, (c) reaction with water, (d) reaction with acids.

14669.

Explain how the activity series accounts for each of the following: (a) occurrence of metals, (b) tendency to corrosion, (c) reaction with water, (d) reaction with acids.

Answer»

Explain how the activity series accounts for each of the following:

(a) occurrence of metals,

(b) tendency to corrosion,

(c) reaction with water,

(d) reaction with acids.

Discussion

14670.	How much oxygen will be obtained by the complete electrolysis of 90 kg of water? 2H2O→2H2+O2
Answer» How much oxygen will be obtained by the complete electrolysis of $90 kg$ of water? $2 H_{2} O \to 2 H_{2} + O_{2}$

Discussion

14671.	What would happen to the number of grass plants and foxes if the number of rabbits : (a) increased? (b) decreased?
Answer» What would happen to the number of grass plants and foxes if the number of rabbits : (a) increased? (b) decreased?

Discussion

14672.	What's the use of conformational isomers?
Answer» What's the use of conformational isomers?

Discussion

14673.	State whether the following statement is true or false: Non-metals react with dilute acids to produce a gas which burns with a pop sound.
Answer» State whether the following statement is true or false: Non-metals react with dilute acids to produce a gas which burns with a pop sound.

Discussion

14674.	Graphite is a good conductor of electricity? Justify
Answer» Graphite is a good conductor of electricity? Justify

Discussion

14675.	When sodium chloride is heated with sulphuric acid below a temperature of 200 degrees celcius, ___ is formed
Answer» When sodium chloride is heated with sulphuric acid below a temperature of 200 degrees celcius, ___ is formed

Discussion

14676.	A bond is formed between two atoms by sharing a pair of electrons, provided entirely by one of the combining atoms but shared by both is called __ bond.
Answer» A bond is formed between two atoms by sharing a pair of electrons, provided entirely by one of the combining atoms but shared by both is called __ bond.

Discussion

14677.	Maximum number of electrons is present in
Answer» Maximum number of electrons is present in

Discussion

14678.	what is mean by chemical decomposition?
Answer» what is mean by chemical decomposition?

Discussion

14679.	Why metals changes its colour when heated at high temprature?
Answer» Why metals changes its colour when heated at high temprature?

Discussion

14680.	Give a reaction of the class of compound that undergoes electrolysis decomposition
Answer» Give a reaction of the class of compound that undergoes electrolysis decomposition

Discussion

14681.	In the raction represented by the following equation : CuO(s)+H2 ⟶ Cu(s)+H2O(l) (a) name the substance oxidised (b) name the substance reduced (c) name the oxidising agent (d) name the reducing agent
Answer» In the raction represented by the following equation : $C u O (s) + H_{2}$ $⟶$ $C u (s) + H_{2} O (l)$ (a) name the substance oxidised (b) name the substance reduced (c) name the oxidising agent (d) name the reducing agent

14681.

In the raction represented by the following equation : CuO(s)+H2 ⟶ Cu(s)+H2O(l) (a) name the substance oxidised (b) name the substance reduced (c) name the oxidising agent (d) name the reducing agent

Answer»

In the raction represented by the following equation :

$C u O (s) + H_{2}$ $⟶$ $C u (s) + H_{2} O (l)$

(a) name the substance oxidised (b) name the substance reduced

(c) name the oxidising agent (d) name the reducing agent

Discussion

14682.	Full difference between oxidation and reduction
Answer» Full difference between oxidation and reduction

Discussion

14683.	(a) Write names and formulae of hydrocarbons containing a single and a double bond (one example for each). Give one characteristic chemical property of each. (b) What is a detergent ? Name one detergent. (c) Why have detergents replaced soap as a washing agent ?
Answer» (a) Write names and formulae of hydrocarbons containing a single and a double bond (one example for each). Give one characteristic chemical property of each. (b) What is a detergent ? Name one detergent. (c) Why have detergents replaced soap as a washing agent ?

Discussion

14684.	Which metals are extracted by heating their oxides?
Answer» Which metals are extracted by heating their oxides?

Discussion

14685.	In the equation, Fe + 4H2O → Fe3O4 + H2, which atom is balanced?
Answer» In the equation, Fe + 4H₂O → Fe₃O₄+ H₂, which atom is balanced?

Discussion

14686.	The different relative spatial arrangement which arise because of rotation around the single bond is called:
Answer» The different relative spatial arrangement which arise because of rotation around the single bond is called:

Discussion

14687.	Most plastic is manufactured from petroleum products. Petrol is the end product of a few million years of natural decay of once-living organisms like plants and animals. Petroleum's main components come from lipids that were first assembled long ago in those organisms' cells. So the question is, if petroleum-derived plastic comes from biomaterial, why doesn't it biodegrade? 1.Decomposers don't have specific enzymes for plastic decomposition. 2.Because of high molecular weight of plastic, it will sediment too deep inside earth where bacteria is absent. 3.Because of colours in the polythene bags, decomposers are unable to decompose. 4. Bond energy in polymer is higher.
Answer» Most plastic is manufactured from petroleum products. Petrol is the end product of a few million years of natural decay of once-living organisms like plants and animals. Petroleum's main components come from lipids that were first assembled long ago in those organisms' cells. So the question is, if petroleum-derived plastic comes from biomaterial, why doesn't it biodegrade? 1.Decomposers don't have specific enzymes for plastic decomposition. 2.Because of high molecular weight of plastic, it will sediment too deep inside earth where bacteria is absent. 3.Because of colours in the polythene bags, decomposers are unable to decompose. 4. Bond energy in polymer is higher.

14687.

Most plastic is manufactured from petroleum products. Petrol is the end product of a few million years of natural decay of once-living organisms like plants and animals. Petroleum's main components come from lipids that were first assembled long ago in those organisms' cells. So the question is, if petroleum-derived plastic comes from biomaterial, why doesn't it biodegrade? 1.Decomposers don't have specific enzymes for plastic decomposition. 2.Because of high molecular weight of plastic, it will sediment too deep inside earth where bacteria is absent. 3.Because of colours in the polythene bags, decomposers are unable to decompose. 4. Bond energy in polymer is higher.

Answer»

Most plastic is manufactured from petroleum products. Petrol is the end product of a few million years of natural decay of once-living organisms like plants and animals. Petroleum's main components come from lipids that were first assembled long ago in those organisms' cells. So the question is, if petroleum-derived plastic comes from biomaterial, why doesn't it biodegrade?

1.Decomposers don't have specific enzymes for plastic decomposition.

2.Because of high molecular weight of plastic, it will sediment too deep inside earth where bacteria is absent.

3.Because of colours in the polythene bags, decomposers are unable to decompose.

4. Bond energy in polymer is higher.

Discussion

14688.	The two dimensional silicates are
Answer» The two dimensional silicates are

Discussion

14689.	Which is correct regarding BOH (where X is electronegativity)?
Answer» Which is correct regarding BOH (where X is electronegativity)?

Discussion

14690.	If m, mn and mp are the masses of ZXA nucleus, neutron and proton respectively, then which of the following is correct?
Answer» If m, $m_{n}$ and $m_{p}$ are the masses of $_{Z} X^{A}$ nucleus, neutron and proton respectively, then which of the following is correct?

Discussion

14691.	The precipitate which is insoluble in all mineral acids is :
Answer» The precipitate which is insoluble in all mineral acids is :

Discussion

14692.	Triads was proposed by-
Answer» Triads was proposed by-

Discussion

14693.	Which among the following has a cyclic structure made up of carbon skeleton?
Answer» Which among the following has a cyclic structure made up of carbon skeleton?

Discussion

14694.	Wether silver get rusted or not
Answer» Wether silver get rusted or not

Discussion

14695.	Iron do not burn on heating but iron fillings burn.explain this statement. With the help of topic `metals reaction with oxygen` .
Answer» Iron do not burn on heating but iron fillings burn.explain this statement. With the help of topic `metals reaction with oxygen` .

Discussion

14696.	How would you obtain: (a) a base from another base, (b) an alkali from a base, (c) salt from another salt ?
Answer» How would you obtain: (a) a base from another base, (b) an alkali from a base, (c) salt from another salt ?

14696.

How would you obtain: (a) a base from another base, (b) an alkali from a base, (c) salt from another salt ?

Answer»

How would you obtain:

(a) a base from another base,

(b) an alkali from a base,

(c) salt from another salt ?

Discussion

14697.	Which of the following is an unsaturated compound?
Answer» Which of the following is an unsaturated compound?

Discussion

14698.	Question 19.4 Write the balanced chemical equation for the following reaction and identify the type of the reaction. Ethene is burnt in the presence of oxygen to form carbon dioxide and water, and releases heat and light.
Answer» Question 19.4 Write the balanced chemical equation for the following reaction and identify the type of the reaction. Ethene is burnt in the presence of oxygen to form carbon dioxide and water, and releases heat and light.

Discussion

14699.	Name a neutral covalent molecule which contains one lone pair of electrons.
Answer» Name a neutral covalent molecule which contains one lone pair of electrons.

Discussion

14700.	Polarisation may be called the distortion of the shape of an anion by an adjacently placed cation.which of the following statements is correct A minimum polarization is brought about by a cation of low radius B a large cation is likely to bring about the largedegree of polarization C maximum polarisation is brought about a cation of highcharge D a small anion is likely to undergo a large degree of polarization
Answer» Polarisation may be called the distortion of the shape of an anion by an adjacently placed cation.which of the following statements is correct A minimum polarization is brought about by a cation of low radius B a large cation is likely to bring about the largedegree of polarization C maximum polarisation is brought about a cation of highcharge D a small anion is likely to undergo a large degree of polarization

14700.

Polarisation may be called the distortion of the shape of an anion by an adjacently placed cation.which of the following statements is correct A minimum polarization is brought about by a cation of low radius B a large cation is likely to bring about the largedegree of polarization C maximum polarisation is brought about a cation of highcharge D a small anion is likely to undergo a large degree of polarization

Answer»

Polarisation may be called the distortion of the shape of an anion by an adjacently placed cation.which of the following statements is correct

A minimum polarization is brought about by a cation of low radius

B a large cation is likely to bring about the largedegree of polarization

C maximum polarisation is brought about a cation of highcharge

D a small anion is likely to undergo a large degree of polarization

Discussion

Explore topic-wise InterviewSolutions in .

What is the state of fire?

How will you test for a gas which is liberated when hydrochloric acid reacts with an active metal?

CO2+H20 gives C6H12O6+O2+H2O How to balance this equation as per short cut method taught in byju's class session

Do basic solutions also have H+ (aq) ions? If yes, then why are these basic?

How do H+ ions exist in water

Correct and balance the following reactions : (a) Ca + H2 ⟶ CaOH + H (b) N + H ⟶ NH3

The angle between sp2 hybrid orbitals is

An electron moves in a circular orbit at some distance from a proton with kinetic energy E.To escape to infinity, the energy which must be supplied to the electron is

Why does gold and silver do not corrode?

How is the rate of a chemical reaction affected by change in concentration of the reactants? Give an example in support of your answer.

why is tincture of iodine applied on wound

If Ac of NH4OH is 11.5 W-1cm2 mol-1 and Acat infinite dilution of NH4OH is 0.4876 W-1cm2 mol-1, its degree of dissociation is:

What is the chemical formula of slaked lime?

From the equation.: C + 2H2SO4 → CO2 + 2H2O +2SO2 Calculate: The volume of sulphur dioxide measured at STP, liberated at the same time. (Volume occupied by 1 mole of a gas at STP is 224 dm3)

Explain why [4 MARKS] (a) Only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate. (b) Nitric acid, when kept in a reagent bottle for a long time, turns yellow.

(a) What is a covalent bond? What type of bond exists in (i) CCl4, and (ii) CaCl2? (b) What is an ionic bond ? What type of bnd is present in oxygen molecule?

An important ore of zinc metal is : (a) calamine (b) cuprite (c) pyrolusite (d) haematite

In copper refining process the anode is ___

Explain how the activity series accounts for each of the following: (a) occurrence of metals, (b) tendency to corrosion, (c) reaction with water, (d) reaction with acids.

How much oxygen will be obtained by the complete electrolysis of 90 kg of water? 2H2O→2H2+O2

What would happen to the number of grass plants and foxes if the number of rabbits : (a) increased? (b) decreased?

What's the use of conformational isomers?

State whether the following statement is true or false: Non-metals react with dilute acids to produce a gas which burns with a pop sound.

Graphite is a good conductor of electricity? Justify

When sodium chloride is heated with sulphuric acid below a temperature of 200 degrees celcius, ___ is formed

A bond is formed between two atoms by sharing a pair of electrons, provided entirely by one of the combining atoms but shared by both is called __ bond.

Maximum number of electrons is present in

what is mean by chemical decomposition?

Why metals changes its colour when heated at high temprature?

Give a reaction of the class of compound that undergoes electrolysis decomposition

In the raction represented by the following equation : CuO(s)+H2 ⟶ Cu(s)+H2O(l) (a) name the substance oxidised (b) name the substance reduced (c) name the oxidising agent (d) name the reducing agent

Full difference between oxidation and reduction

(a) Write names and formulae of hydrocarbons containing a single and a double bond (one example for each). Give one characteristic chemical property of each. (b) What is a detergent ? Name one detergent. (c) Why have detergents replaced soap as a washing agent ?

Which metals are extracted by heating their oxides?

In the equation, Fe + 4H2O → Fe3O4 + H2, which atom is balanced?

The different relative spatial arrangement which arise because of rotation around the single bond is called:

The two dimensional silicates are

Which is correct regarding BOH (where X is electronegativity)?

If m, mn and mp are the masses of ZXA nucleus, neutron and proton respectively, then which of the following is correct?

The precipitate which is insoluble in all mineral acids is :

Triads was proposed by-

Which among the following has a cyclic structure made up of carbon skeleton?

Wether silver get rusted or not

Iron do not burn on heating but iron fillings burn.explain this statement. With the help of topic `metals reaction with oxygen` .

How would you obtain: (a) a base from another base, (b) an alkali from a base, (c) salt from another salt ?

Which of the following is an unsaturated compound?

Question 19.4 Write the balanced chemical equation for the following reaction and identify the type of the reaction. Ethene is burnt in the presence of oxygen to form carbon dioxide and water, and releases heat and light.

Name a neutral covalent molecule which contains one lone pair of electrons.