15280 + Interview Questions in Chemistry Page 92 InterviewSolution

4551.	0.5 mole of FeS is made to react with 49 H2SO4. The mass of H2S formed isFeS + H2SO4--H2S + FeSO4
Answer» 0.5 mole of FeS is made to react with 49 H2SO4. The mass of H2S formed is FeS + H2SO4--H2S + FeSO4

Discussion

4552.	Dissociation of hydrogen chloride into hydrogen and chlorine occur at temperatures
Answer» Dissociation of hydrogen chloride into hydrogen and chlorine occur at temperatures

Discussion

4553.	Can corrosion tale place in vacuum.
Answer» Can corrosion tale place in vacuum.

Discussion

4554.	The colour composition of beetle population is likely to change in the following manner:
Answer» The colour composition of beetle population is likely to change in the following manner:

Discussion

4555.	81 Consider the reaction, 2A(g)+B(g)=2C(g) for which k\ast c=350. if mole of each of the reac†an t and product are mixed in a 2.0L flask, then the reaction quitent and the spon†an eous direction of the system will be?
Answer» 81 Consider the reaction, 2A(g)+B(g)=2C(g) for which k\ast c=350. if mole of each of the reac†an t and product are mixed in a 2.0L flask, then the reaction quitent and the spon†an eous direction of the system will be?

Discussion

4556.	for a gaseous phase reaction at 27 TEMP 2A gives 3B if pressure of A changes from 2atm to 1.5 atm in 10 sec cal.a. rate of reaction in 1. M/sec 2.atm/sec b. pressure of b in the same interval
Answer» for a gaseous phase reaction at 27 TEMP 2A gives 3B if pressure of A changes from 2atm to 1.5 atm in 10 sec cal. a. rate of reaction in 1. M/sec 2.atm/sec b. pressure of b in the same interval

Discussion

4557.	The number of atoms present in 62 g of phosphorous if its gram atomic mass is 31 g is p ×1024. What is the value of p?1.204
Answer» The number of atoms present in 62 g of phosphorous if its gram atomic mass is 31 g is p $\times 10^{24}$ . What is the value of p? 1.204

Discussion

4558.	Which of the followingspecies will have largestsize?(a) Mg(b) Mg2\ast(c) AI(d) AlB=aluminium io+ explain how
Answer» Which of the followingspecies will have largestsize?(a) Mg(b) Mg2\ast(c) AI(d) AlB=aluminium io+ explain how

Discussion

4559.	One of the following molecular formula can represent two organic compounds having different functional groups : This molecular formula is : (a) C5H12O (b) C5H10O (c) C5H10O2 (d) C5H12
Answer» One of the following molecular formula can represent two organic compounds having different functional groups : This molecular formula is : (a) $C_{5} H_{12} O$ (b) $C_{5} H_{10} O$ (c) $C_{5} H_{10} O_{2}$ (d) $C_{5} H_{12}$

Discussion

4560.	ntone gram sample of Ammonium Nitrate is decomposed in a Bomb calorimeter. The temperature of the calorimetre increases by 6.12 Kelvin the heat capacity of the system is 1.23 kilojoule/gm/deg. wn ntWhat is the molar heat of decomposition of Ammonium Nitrate??n
Answer» ntone gram sample of Ammonium Nitrate is decomposed in a Bomb calorimeter. The temperature of the calorimetre increases by 6.12 Kelvin the heat capacity of the system is 1.23 kilojoule/gm/deg. wn ntWhat is the molar heat of decomposition of Ammonium Nitrate??n

Discussion

4561.	Why glucose and alcohol doesn't conduct electricity?
Answer» Why glucose and alcohol doesn't conduct electricity?

Discussion

4562.	Name all amphoteric oxides and amphoteric metals
Answer» Name all amphoteric oxides and amphoteric metals

Discussion

4563.	List some uses of aluminium in our everyday life.
Answer» List some uses of aluminium in our everyday life.

Discussion

4564.	Question 2 Give any two ways in which biodegradable substances would affect the environment.
Answer» Question 2 Give any two ways in which biodegradable substances would affect the environment.

Discussion

4565.	Identify A, B, C, D and E respectively in the given chemical reactions.
Answer» Identify A, B, C, D and E respectively in the given chemical reactions.

Discussion

4566.	(a) Name the ore from which aluminium is extracted.(b) How is ore purified (give equations also)?(c) How is aluminium obtained from pure ore?(d) Which method of refining is used to get 99.8% pure aluminium?
Answer» (a) Name the ore from which aluminium is extracted. (b) How is ore purified (give equations also)? (c) How is aluminium obtained from pure ore? (d) Which method of refining is used to get 99.8% pure aluminium?

Discussion

4567.	In the third level of food chain 30J of energy was available to vultures.How much energy would've been available to producers?
Answer» In the third level of food chain 30J of energy was available to vultures.How much energy would've been available to producers?

Discussion

4568.	A reddish brown vessel developed a green coloured solid X when left open for a long time When reacted with dil H2SO4 (sulphuric acid) it forms a blue coloured solution along with brisk effervescence due to colourless and odourless gas Z .X decomposes to form a black coloured oxide Y of a reddish brown metal along with gas Z Identify X Yand Z
Answer» A reddish brown vessel developed a green coloured solid X when left open for a long time When reacted with dil $H_{2} S O_{4}$ (sulphuric acid) it forms a blue coloured solution along with brisk effervescence due to colourless and odourless gas Z .X decomposes to form a black coloured oxide Y of a reddish brown metal along with gas Z Identify X Yand Z

Discussion

4569.	No chemical reaction takes place when granules of a solid, A, are mixed with the powder of another solid, B. However, when the mixture is heated, a reaction takes place between its components. One of the products, C, is a metal and settles down in the molten state while the other product, D, floats over it. It was observed that the reaction was highly exothermic.(a) Based on the given information, make an assumption about A and B and write a chemical equation for the chemical reaction indicating the conditions of reaction, physical state of reactants and products and thermal status of the reaction.(b) Mention any two types of reactions under which above chemical reaction can be classified.
Answer» No chemical reaction takes place when granules of a solid, A, are mixed with the powder of another solid, B. However, when the mixture is heated, a reaction takes place between its components. One of the products, C, is a metal and settles down in the molten state while the other product, D, floats over it. It was observed that the reaction was highly exothermic. (a) Based on the given information, make an assumption about A and B and write a chemical equation for the chemical reaction indicating the conditions of reaction, physical state of reactants and products and thermal status of the reaction. (b) Mention any two types of reactions under which above chemical reaction can be classified.

Discussion

4570.	What happens when Epsom salt is added to sulphuric acid ??
Answer» What happens when Epsom salt is added to sulphuric acid ??

Discussion

4571.	i f the 1st ionization energy of H atom is 13.6 eV, then the 2nd ionization energy of He atom is27.2 eV40.8 eV 54.4 eV108.8 eV
Answer» i f the 1st ionization energy of H atom is 13.6 eV, then the 2nd ionization energy of He atom is 27.2 eV 40.8 eV 54.4 eV 108.8 eV

Discussion

4572.	What effect does concentration of OH ion have on the nature of the solution?
Answer» What effect does concentration of OH ion have on the nature of the solution?

Discussion

4573.	Pick up the coloured anion from the options given below.
Answer» Pick up the coloured anion from the options given below.

Discussion

4574.	Valence electrons in the atom of elements A is 4 and in the element B is 2 most probable compound formed from A and B. Is
Answer» Valence electrons in the atom of elements A is 4 and in the element B is 2 most probable compound formed from A and B. Is

Discussion

4575.	What is the order of atomic size of 2nd period?is there any exception?
Answer» What is the order of atomic size of 2nd period?is there any exception?

Discussion

4576.	A student prepared hydrogen chloride gas by treating sodium chloride with concentrated sulphuric acid in a test-tube. He held a strip of dry blue litmus paper in HCl gas coming out of the test-tube. The student observed that on coming in contact with HCl gas, the colour of blue litmus paper :(1) turned yellow(2) turned violet(3) remained blue(4) turned red
Answer» A student prepared hydrogen chloride gas by treating sodium chloride with concentrated sulphuric acid in a test-tube. He held a strip of dry blue litmus paper in HCl gas coming out of the test-tube. The student observed that on coming in contact with HCl gas, the colour of blue litmus paper : (1) turned yellow (2) turned violet (3) remained blue (4) turned red

Discussion

4577.	Name the gas which is formed when acetic acid reacts with sodium carbonate ?
Answer» Name the gas which is formed when acetic acid reacts with sodium carbonate ?

Discussion

4578.	A hydrocarbon chain having molecular formula C7H16 is numbered in four different ways. Which option is correctly representing the numbering of carbon atoms?
Answer» A hydrocarbon chain having molecular formula $C_{7} H_{16}$ is numbered in four different ways. Which option is correctly representing the numbering of carbon atoms?

Discussion

4579.	Can an acidic salt and basic salt react further to form salt and water
Answer» Can an acidic salt and basic salt react further to form salt and water

Discussion

4580.	Which of the following has highest electron affinity Li O O- N
Answer» Which of the following has highest electron affinity Li O O- N

Discussion

4581.	Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more than Y but their neutrons are equal in number. Which of the following is correct about X and Y?
Answer» Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more than Y but their neutrons are equal in number. Which of the following is correct about X and Y?

Discussion

4582.	Name the major salt present in sea-water.
Answer» Name the major salt present in sea-water.

Discussion

4583.	(a) Name three elements that have a single electron in their outermost shells. (b) Name two elements that have two electrons in their outermost shells. (c) Name three elements with completely filled outermost shells.
Answer» (a) Name three elements that have a single electron in their outermost shells. (b) Name two elements that have two electrons in their outermost shells. (c) Name three elements with completely filled outermost shells.

4583.

(a) Name three elements that have a single electron in their outermost shells. (b) Name two elements that have two electrons in their outermost shells. (c) Name three elements with completely filled outermost shells.

Answer»

(a) Name three elements that have a single electron in their outermost shells.

(b) Name two elements that have two electrons in their outermost shells.

(c) Name three elements with completely filled outermost shells.

Discussion

4584.	Why carbon and its compounds are used as fuels for most applications? [2 MARKS]
Answer» Why carbon and its compounds are used as fuels for most applications? [2 MARKS]

Discussion

4585.	100. Which one of the following substance will be a mixed salt? A NaHCO3 B Ca(OCl)Cl C K2SO4Al2(SO4)3.24H2O D Mg(OH)Br
Answer» 100. Which one of the following substance will be a mixed salt? A NaHCO3 B Ca(OCl)Cl C K2SO4Al2(SO4)3.24H2O D Mg(OH)Br

Discussion

4586.	13.6 eV is required for the ionization of a hydrogen atom. An electron in a hydrogen atom in its ground state absorbs 1.50 times as much energy as the minimum required for it to escape from the atom. What is the wavelength of the emitted electron? (me=9.109×10–31kg,e=1.602×10–19 coulomb, h=6.63×10–34J.s)
Answer» 13.6 eV is required for the ionization of a hydrogen atom. An electron in a hydrogen atom in its ground state absorbs 1.50 times as much energy as the minimum required for it to escape from the atom. What is the wavelength of the emitted electron? $(m_{e} = 9.109 \times 10^{- 31} k g, e = 1.602 \times 10^{- 19}$ coulomb, $h = 6.63 \times 10^{- 34} J . s)$

Discussion

4587.	which of the following isomer having moleculer formula C6H14 will give minimum number of monochloro derivetives? 1hexane 2.2methylpen†an e 3.)3methyl0epen†an e 4)2,3dimethyl bu†an e
Answer» which of the following isomer having moleculer formula C6H14 will give minimum number of monochloro derivetives? 1hexane 2.2methylpen†an e 3.)3methyl0epen†an e 4)2,3dimethyl bu†an e

Discussion

4588.	Size of Lu w.r.t. La
Answer» Size of Lu w.r.t. La

Discussion

4589.	33.Difference between oxide and peroxide
Answer» 33.Difference between oxide and peroxide

Discussion

4590.	Can we write hydrogen ion in place of hydronium ion in a sentence ?
Answer» Can we write hydrogen ion in place of hydronium ion in a sentence ?

Discussion

4591.	How many moles and gram of HCl are present in 500cm cube of 0.25 M HCl solution respectively
Answer» How many moles and gram of HCl are present in 500cm cube of 0.25 M HCl solution respectively

Discussion

4592.	What Is pressure?
Answer» What Is pressure?

Discussion

4593.	Identify X in the following reaction.CO2+NaOH→X+H2O
Answer» Identify X in the following reaction. $C O_{2} + N a O H \to X + H_{2} O$

Discussion

4594.	Why is diamond called nonmetal?
Answer» Why is diamond called nonmetal?

Discussion

4595.	Naco is fcc but it's coordination number is 6 instead of 12
Answer» Naco is fcc but it's coordination number is 6 instead of 12

Discussion

4596.	Question 4What is a balanced chemical equation? Why should chemical equations be balanced?
Answer» Question 4 What is a balanced chemical equation? Why should chemical equations be balanced?

Discussion

4597.	Why dz^2 and dz^2 orbital cannot form pi bond. Give 2 reason?
Answer» Why dz^2 and dz^2 orbital cannot form pi bond. Give 2 reason?

Discussion

4598.	Why does Xe combine with any other element even though its stable?
Answer» Why does Xe combine with any other element even though its stable?

Discussion

4599.	Question 49What happens when?(a) ZnCO3 is heated in the absence of oxygen?(b) a mixture of Cu2O and Cu2S is heated?
Answer» Question 49 What happens when? (a) ${ZnCO}_{3}$ is heated in the absence of oxygen? (b) a mixture of ${Cu}_{2} O$ and ${Cu}_{2} S$ is heated?

Discussion

4600.	7 Calculate the no.of oxygen atoms in 10g of calcium carbonate. Also calculate mass of oxygen molecules which contain same no.of molecules as in 1.4g of nitrogen.
Answer» 7 Calculate the no.of oxygen atoms in 10g of calcium carbonate. Also calculate mass of oxygen molecules which contain same no.of molecules as in 1.4g of nitrogen.

Discussion

Explore topic-wise InterviewSolutions in .

0.5 mole of FeS is made to react with 49 H2SO4. The mass of H2S formed isFeS + H2SO4--H2S + FeSO4

Dissociation of hydrogen chloride into hydrogen and chlorine occur at temperatures

Can corrosion tale place in vacuum.

The colour composition of beetle population is likely to change in the following manner:

81 Consider the reaction, 2A(g)+B(g)=2C(g) for which k\ast c=350. if mole of each of the reac†an t and product are mixed in a 2.0L flask, then the reaction quitent and the spon†an eous direction of the system will be?

for a gaseous phase reaction at 27 TEMP 2A gives 3B if pressure of A changes from 2atm to 1.5 atm in 10 sec cal.a. rate of reaction in 1. M/sec 2.atm/sec b. pressure of b in the same interval

The number of atoms present in 62 g of phosphorous if its gram atomic mass is 31 g is p ×1024. What is the value of p?1.204

Which of the followingspecies will have largestsize?(a) Mg(b) Mg2\ast(c) AI(d) AlB=aluminium io+ explain how

One of the following molecular formula can represent two organic compounds having different functional groups : This molecular formula is : (a) C5H12O (b) C5H10O (c) C5H10O2 (d) C5H12

ntone gram sample of Ammonium Nitrate is decomposed in a Bomb calorimeter. The temperature of the calorimetre increases by 6.12 Kelvin the heat capacity of the system is 1.23 kilojoule/gm/deg. wn ntWhat is the molar heat of decomposition of Ammonium Nitrate??n

Why glucose and alcohol doesn't conduct electricity?

Name all amphoteric oxides and amphoteric metals

List some uses of aluminium in our everyday life.

Question 2 Give any two ways in which biodegradable substances would affect the environment.

Identify A, B, C, D and E respectively in the given chemical reactions.

(a) Name the ore from which aluminium is extracted.(b) How is ore purified (give equations also)?(c) How is aluminium obtained from pure ore?(d) Which method of refining is used to get 99.8% pure aluminium?

In the third level of food chain 30J of energy was available to vultures.How much energy would've been available to producers?

What happens when Epsom salt is added to sulphuric acid ??

i f the 1st ionization energy of H atom is 13.6 eV, then the 2nd ionization energy of He atom is27.2 eV40.8 eV 54.4 eV108.8 eV

What effect does concentration of OH ion have on the nature of the solution?

Pick up the coloured anion from the options given below.

Valence electrons in the atom of elements A is 4 and in the element B is 2 most probable compound formed from A and B. Is

What is the order of atomic size of 2nd period?is there any exception?

Name the gas which is formed when acetic acid reacts with sodium carbonate ?

A hydrocarbon chain having molecular formula C7H16 is numbered in four different ways. Which option is correctly representing the numbering of carbon atoms?

Can an acidic salt and basic salt react further to form salt and water

Which of the following has highest electron affinity Li O O- N

Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more ​​​​​than Y but their neutrons are equal in number. Which of the following is correct about X and Y?

Name the major salt present in sea-water.

(a) Name three elements that have a single electron in their outermost shells. (b) Name two elements that have two electrons in their outermost shells. (c) Name three elements with completely filled outermost shells.

Why carbon and its compounds are used as fuels for most applications? [2 MARKS]

100. Which one of the following substance will be a mixed salt? A NaHCO3 B Ca(OCl)Cl C K2SO4Al2(SO4)3.24H2O D Mg(OH)Br

which of the following isomer having moleculer formula C6H14 will give minimum number of monochloro derivetives? 1hexane 2.2methylpen†an e 3.)3methyl0epen†an e 4)2,3dimethyl bu†an e

Size of Lu w.r.t. La

33.Difference between oxide and peroxide

Can we write hydrogen ion in place of hydronium ion in a sentence ?

How many moles and gram of HCl are present in 500cm cube of 0.25 M HCl solution respectively

What Is pressure?

Identify X in the following reaction.CO2+NaOH→X+H2O

Why is diamond called nonmetal?

Naco is fcc but it's coordination number is 6 instead of 12

Question 4What is a balanced chemical equation? Why should chemical equations be balanced?

Why dz^2 and dz^2 orbital cannot form pi bond. Give 2 reason?

Why does Xe combine with any other element even though its stable?

Question 49What happens when?(a) ZnCO3 is heated in the absence of oxygen?(b) a mixture of Cu2O and Cu2S is heated?

7 Calculate the no.of oxygen atoms in 10g of calcium carbonate. Also calculate mass of oxygen molecules which contain same no.of molecules as in 1.4g of nitrogen.

Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more than Y but their neutrons are equal in number. Which of the following is correct about X and Y?