7248 + Interview Questions in Chemistry Page 46 InterviewSolution

2251.	Metals react with water to form either their respective oxides or hydroxides and liberate:
Answer» Metals react with water to form either their respective oxides or hydroxides and liberate:

Discussion

2252.	Chemical equation of rusting
Answer» Chemical equation of rusting

Discussion

2253.	Acid rains in some industrial cities are due to the effect of atmospheric pollution by
Answer» Acid rains in some industrial cities are due to the effect of atmospheric pollution by

Discussion

2254.	What is present in air and what is complete chemistry?
Answer» What is present in air and what is complete chemistry?

Discussion

2255.	Why is CO2 a lewis acid?
Answer» Why is CO2 a lewis acid?

Discussion

2256.

Four metals A, B, C and D are, in turn, added to the following solutions one by one. The observations made are tabulated below: Metal Iron (II) sulphate Copper (II) sulphate Zinc sulphate Silver nitrate A No reaction Displacement - - B Displacement - No reaction - C No reaction No reaction No reaction Displacement D No reaction No reaction No reaction No reaction Answer the following questions based on above information:(i) Which is the most active metal and why?(ii) What would be observed if B is added to a solution of copper (II) sulphate and why?(iii) Arrange the metals A, B, C and D in order of increasing reactivity.(iv) Container of which metal can be used to store both zinc sulphate solution and silver nitrate solution. Give reason for your choice.(v) Which of the above solutions can be easily stored in a computer made up of any of these metals?

Answer» Four metals A, B, C and D are, in turn, added to the following solutions one by one. The observations made are tabulated below:

Metal	Iron (II) sulphate	Copper (II) sulphate	Zinc sulphate	Silver nitrate
A	No reaction	Displacement	-	-
B	Displacement	-	No reaction	-
C	No reaction	No reaction	No reaction	Displacement
D	No reaction	No reaction	No reaction	No reaction

Answer the following questions based on above information:

(i) Which is the most active metal and why?

(ii) What would be observed if B is added to a solution of copper (II) sulphate and why?

(iii) Arrange the metals A, B, C and D in order of increasing reactivity.

(iv) Container of which metal can be used to store both zinc sulphate solution and silver nitrate solution. Give reason for your choice.

(v) Which of the above solutions can be easily stored in a computer made up of any of these metals?

Discussion

2257.	64.The initial pressure of a mixture of methane and ethane is P1.The mixture undergoes combutin and the final pressure at 25*c is P2.The molar ratio of methane and ethane is (volume is constant) P1:3P2 P1-P2::3P2 P1-2P2 / P1-P2 2P1-P2 / P2-P1
Answer» 64.The initial pressure of a mixture of methane and ethane is P1.The mixture undergoes combutin and the final pressure at 25*c is P2.The molar ratio of methane and ethane is (volume is constant) P1:3P2 P1-P2::3P2 P1-2P2 / P1-P2 2P1-P2 / P2-P1

Discussion

2258.	Why do we use powdered sugar when making a sherbet?
Answer» Why do we use powdered sugar when making a sherbet?

Discussion

2259.	Match and choose the correct order of elements to the corresponding atomic structure.
Answer» Match and choose the correct order of elements to the corresponding atomic structure.

2259.

Match and choose the correct order of elements to the corresponding atomic structure.

Answer»

Match and choose the correct order of elements to the corresponding atomic structure.

Discussion

2260.	It is said that more the lattice energy, stronger is the ionic bond. But there is covalent character also in ionic bond. So, while deciding for bond strength of an ionic bond, do we have to see only electrostatic force of attraction or Fajan's rules also ?
Answer» It is said that more the lattice energy, stronger is the ionic bond. But there is covalent character also in ionic bond. So, while deciding for bond strength of an ionic bond, do we have to see only electrostatic force of attraction or Fajan's rules also ?

Discussion

2261.	Question 6.2Balance the following chemical equation:NaOH+H2SO4→Na2SO4+H2O
Answer» Question 6.2 Balance the following chemical equation: $NaOH + H_{2} {SO}_{4} \to {Na}_{2} {SO}_{4} + H_{2} O$

Discussion

2262.	in NO3 ion number of bond pair and lone pair of electrons in nitrogen atom are
Answer» in NO3 ion number of bond pair and lone pair of electrons in nitrogen atom are

Discussion

2263.	Activity - To show that solids and liquids cannot be compressed but gases can be compressed Easily.
Answer» Activity - To show that solids and liquids cannot be compressed but gases can be compressed Easily.

Discussion

2264.	निम्नलिखित प्रश्न का उत्तर (50-60 शब्दों में) लिखिए −बाज़ार के लोग खरबूज़े बेचनेवाली स्त्री के बारे में क्या-क्या कह रहे थे? अपने शब्दों में लिखिए।
Answer» निम्नलिखित प्रश्न का उत्तर (50-60 शब्दों में) लिखिए − बाज़ार के लोग खरबूज़े बेचनेवाली स्त्री के बारे में क्या-क्या कह रहे थे? अपने शब्दों में लिखिए।

2264.

निम्नलिखित प्रश्न का उत्तर (50-60 शब्दों में) लिखिए −बाज़ार के लोग खरबूज़े बेचनेवाली स्त्री के बारे में क्या-क्या कह रहे थे? अपने शब्दों में लिखिए।

Answer»

निम्नलिखित प्रश्न का उत्तर (50-60 शब्दों में) लिखिए −

बाज़ार के लोग खरबूज़े बेचनेवाली स्त्री के बारे में क्या-क्या कह रहे थे? अपने शब्दों में लिखिए।

Discussion

2265.	Which of the following is/are uses of nylon?
Answer» Which of the following is/are uses of nylon?

Discussion

2266.	28.whar would be the distance of closest approach when an alpha particle of kinetic energy 5.5 MeV is bombarded to a gold nucleus.
Answer» 28.whar would be the distance of closest approach when an alpha particle of kinetic energy 5.5 MeV is bombarded to a gold nucleus.

Discussion

2267.	Which of the following oxides of nitrogen is a coloured gas ?
Answer» Which of the following oxides of nitrogen is a coloured gas ?

Discussion

2268.	Why synthetic fibres are more popular than natural fibres?
Answer» Why synthetic fibres are more popular than natural fibres?

Discussion

2269.	which of the given metal Ion form high tendency to Complex with CO?
Answer» which of the given metal Ion form high tendency to Complex with CO?

Discussion

2270.	What is the formula to find the degree of dissociation of reactant in a first order reaction
Answer» What is the formula to find the degree of dissociation of reactant in a first order reaction

Discussion

2271.	An hypothetical element (Y) has two oxides. If first oxide (YO) contains 40% oxygen and second oxide contains 20% oxygen then the formula of second oxide is:
Answer» An hypothetical element (Y) has two oxides. If first oxide (YO) contains 40% oxygen and second oxide contains 20% oxygen then the formula of second oxide is:

Discussion

2272.	You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
Answer» You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?

Discussion

2273.	LPG stands for
Answer» LPG stands for

Discussion

2274.	Is the ionised hydrogen and proton are same ?
Answer» Is the ionised hydrogen and proton are same ?

Discussion

2275.	are all metal oxides basic in nature?
Answer» are all metal oxides basic in nature?

Discussion

2276.	What does the diffusion of gases tell us about their particles ?
Answer» What does the diffusion of gases tell us about their particles ?

Discussion

2277.	Which one of the following is an inexhaustible natural resource?
Answer» Which one of the following is an inexhaustible natural resource?

Discussion

2278.	Which of the following correctly describes a compound?
Answer» Which of the following correctly describes a compound?

Discussion

2279.	Can water not be formed by compounding hydrogen and oxygen?
Answer» Can water not be formed by compounding hydrogen and oxygen?

Discussion

2280.	What is obtained during the processing of coal to get coke? [1 MARK]
Answer» What is obtained during the processing of coal to get coke? [1 MARK]

Discussion

2281.	A metal X can replace a metal Y from its salt solution. But Y cannot replace X from its salt solution. Which metal is higher up in the reactivity series?
Answer» A metal X can replace a metal Y from its salt solution. But Y cannot replace X from its salt solution. Which metal is higher up in the reactivity series?

Discussion

2282.	what is the frequency of revolution of electron present in 2nd bohr, orbit of H atom
Answer» what is the frequency of revolution of electron present in 2nd bohr, orbit of H atom

Discussion

2283.	When calcium carbonate is heated, it gives calcium oxide and carbon dioxide. Is this reaction reversible or irreversible ?
Answer» When calcium carbonate is heated, it gives calcium oxide and carbon dioxide. Is this reaction reversible or irreversible ?

Discussion

2284.	1l of CO2 reacts with excess of carbon 1.4l of gaseous mixture obtained.Calculate CO2 and CO in this mixture
Answer» 1l of CO2 reacts with excess of carbon 1.4l of gaseous mixture obtained.Calculate CO2 and CO in this mixture

Discussion

2285.	It’s a hot sunny day and Sushweta is very thirsty, so she goes inside the kitchen to make a drink for herself. She accidentally pours some edible acidic solution into water and drinks it. What would be the taste of the drink?
Answer» It’s a hot sunny day and Sushweta is very thirsty, so she goes inside the kitchen to make a drink for herself. She accidentally pours some edible acidic solution into water and drinks it. What would be the taste of the drink?

Discussion

2286.	Which of the following reaction(s) involves absorption of light to initiate?
Answer» Which of the following reaction(s) involves absorption of light to initiate?

Discussion

2287.	11. What is formed on heating H3PO4?
Answer» 11. What is formed on heating H3PO4?

Discussion

2288.	Tabulate the differences in the characteristics of states of matter.
Answer» Tabulate the differences in the characteristics of states of matter.

Discussion

2289.	What is the difference between double bohr and double haldane effect?
Answer» What is the difference between double bohr and double haldane effect?

Discussion

2290.	What do you mean by Non-biodegradable waste. Give some examples.
Answer» What do you mean by Non-biodegradable waste. Give some examples.

Discussion

2291.	Differentiate between the following.(a)Potential and actual resources(b)Ubiquitous and localised resources
Answer» Differentiate between the following. (a)Potential and actual resources (b)Ubiquitous and localised resources

2291.

Differentiate between the following.(a)Potential and actual resources(b)Ubiquitous and localised resources

Answer»

Differentiate between the following.

(a)Potential and actual resources

(b)Ubiquitous and localised resources

Discussion

2292.	59.Water falls from a height of 50 m. What is the rise in temperature of water at bottom if whole energy remains in the water? 1) 0.96^°C 2) 1.02^°C 3) 1.16^°C 4) 0.23^°C
Answer» 59.Water falls from a height of 50 m. What is the rise in temperature of water at bottom if whole energy remains in the water? 1) 0.96^°C 2) 1.02^°C 3) 1.16^°C 4) 0.23^°C

Discussion

2293.	Two metallic oxides contains 27.6 % and 30 % oxygen respectively if the formula of the first oxide is x3o4 that of the second will be
Answer» Two metallic oxides contains 27.6 % and 30 % oxygen respectively if the formula of the first oxide is x3o4 that of the second will be

Discussion

2294.	Calculate the log10Ksp value for CdS at 25oCGiven:Cd2+(aq) + 2e−→Cd(s); Eo = −0.403 VCdS(s) + 2e−→Cd(s)+S2−(aq); Eo = −1.21 V(here Ksp is solubility product)
Answer» Calculate the ${log}_{10} K_{s p}$ value for $C d S$ at $25^{o} C$ Given: $C d^{2 +} (a q) + 2 e^{-} \to C d (s); E^{o} = - 0.403 V$ $C d S (s) + 2 e^{-} \to C d (s) + S^{2 -} (a q); E^{o} = - 1.21 V$ (here $K_{s p}$ is solubility product)

Discussion

2295.	Scientists say that there were two products after the Big Bang. One was matter and the other was anti-matter. Both of them were produced equally (50% matter and 50% anti-matter). But today we see only matter everywhere. Where has the anti-matter gone?
Answer» Scientists say that there were two products after the Big Bang. One was matter and the other was anti-matter. Both of them were produced equally (50% matter and 50% anti-matter). But today we see only matter everywhere. Where has the anti-matter gone?

Discussion

2296.	What is a separating funnel? With the help of a diagram explain its use to separate oil and water.
Answer» What is a separating funnel? With the help of a diagram explain its use to separate oil and water.

Discussion

2297.	Which of the following react with oxygen in air while burning to produce heat and light?
Answer» Which of the following react with oxygen in air while burning to produce heat and light?

Discussion

2298.	Write any four characteristics of an ideal fuel.
Answer» Write any four characteristics of an ideal fuel.

Discussion

2299.	Which factor would not affect the solubility of sugar in water?
Answer» Which factor would not affect the solubility of sugar in water?

Discussion

2300.	Define A) cathode tube ray experiment B) quantum number C) orbital D) Rydberg equation E) Bohr's atomic model
Answer» Define A) cathode tube ray experiment B) quantum number C) orbital D) Rydberg equation E) Bohr's atomic model

Discussion

Explore topic-wise InterviewSolutions in .

Metals react with water to form either their respective oxides or hydroxides and liberate:

Chemical equation of rusting

Acid rains in some industrial cities are due to the effect of atmospheric pollution by

What is present in air and what is complete chemistry?

Why is CO2 a lewis acid?

64.The initial pressure of a mixture of methane and ethane is P1.The mixture undergoes combutin and the final pressure at 25*c is P2.The molar ratio of methane and ethane is (volume is constant) P1:3P2 P1-P2::3P2 P1-2P2 / P1-P2 2P1-P2 / P2-P1

Why do we use powdered sugar when making a sherbet?

Match and choose the correct order of elements to the corresponding atomic structure.

It is said that more the lattice energy, stronger is the ionic bond. But there is covalent character also in ionic bond. So, while deciding for bond strength of an ionic bond, do we have to see only electrostatic force of attraction or Fajan's rules also ?

Question 6.2Balance the following chemical equation:NaOH+H2SO4→Na2SO4+H2O

in NO3 ion number of bond pair and lone pair of electrons in nitrogen atom are

Activity - To show that solids and liquids cannot be compressed but gases can be compressed Easily.

Which of the following is/are uses of nylon?

28.whar would be the distance of closest approach when an alpha particle of kinetic energy 5.5 MeV is bombarded to a gold nucleus.

Which of the following oxides of nitrogen is a coloured gas ?

Why synthetic fibres are more popular than natural fibres?

which of the given metal Ion form high tendency to Complex with CO?

What is the formula to find the degree of dissociation of reactant in a first order reaction

An hypothetical element (Y) has two oxides. If first oxide (YO) contains 40% oxygen and second oxide contains 20% oxygen then the formula of second oxide is:

You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?

LPG stands for

Is the ionised hydrogen and proton are same ?

are all metal oxides basic in nature?

What does the diffusion of gases tell us about their particles ?

Which one of the following is an inexhaustible natural resource?

Which of the following correctly describes a compound?

Can water not be formed by compounding hydrogen and oxygen?

What is obtained during the processing of coal to get coke? [1 MARK]

A metal X can replace a metal Y from its salt solution. But Y cannot replace X from its salt solution. Which metal is higher up in the reactivity series?

what is the frequency of revolution of electron present in 2nd bohr, orbit of H atom

When calcium carbonate is heated, it gives calcium oxide and carbon dioxide. Is this reaction reversible or irreversible ?

1l of CO2 reacts with excess of carbon 1.4l of gaseous mixture obtained.Calculate CO2 and CO in this mixture

It’s a hot sunny day and Sushweta is very thirsty, so she goes inside the kitchen to make a drink for herself. She accidentally pours some edible acidic solution into water and drinks it. What would be the taste of the drink?

Which of the following reaction(s) involves absorption of light to initiate?

11. What is formed on heating H3PO4?

Tabulate the differences in the characteristics of states of matter.

What is the difference between double bohr and double haldane effect?

What do you mean by Non-biodegradable waste. Give some examples.

Differentiate between the following.(a)Potential and actual resources(b)Ubiquitous and localised resources

59.Water falls from a height of 50 m. What is the rise in temperature of water at bottom if whole energy remains in the water? 1) 0.96^°C 2) 1.02^°C 3) 1.16^°C 4) 0.23^°C

Two metallic oxides contains 27.6 % and 30 % oxygen respectively if the formula of the first oxide is x3o4 that of the second will be

Calculate the log10Ksp value for CdS at 25oCGiven:Cd2+(aq) + 2e−→Cd(s); Eo = −0.403 VCdS(s) + 2e−→Cd(s)+S2−(aq); Eo = −1.21 V(here Ksp is solubility product)

Scientists say that there were two products after the Big Bang. One was matter and the other was anti-matter. Both of them were produced equally (50% matter and 50% anti-matter). But today we see only matter everywhere. Where has the anti-matter gone?

What is a separating funnel? With the help of a diagram explain its use to separate oil and water.

Which of the following react with oxygen in air while burning to produce heat and light?

Write any four characteristics of an ideal fuel.

Which factor would not affect the solubility of sugar in water?

Define A) cathode tube ray experiment B) quantum number C) orbital D) Rydberg equation E) Bohr's atomic model