15280 + Interview Questions in Chemistry

1.	Question 1 (iii) What are the ions present in Na2O and MgO compounds?
Answer» Question 1 (iii) What are the ions present in ${Na}_{2} O$ and $MgO$ compounds?

Discussion

2.	Why does chemical reaction occur? What are the different types of chemical reaction.
Answer» Why does chemical reaction occur? What are the different types of chemical reaction.

Discussion

3.	Name the alloy of zinc used in simple voltaic cells.
Answer» Name the alloy of zinc used in simple voltaic cells.

Discussion

4.	Question 46 (a) In this ladder (Figure 5.2) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table. (b) Arrange them in the order of their group also.
Answer» Question 46 (a) In this ladder (Figure 5.2) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table. (b) Arrange them in the order of their group also.

4.

Question 46 (a) In this ladder (Figure 5.2) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table. (b) Arrange them in the order of their group also.

Answer»

Question 46
(a) In this ladder (Figure 5.2) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table.

(b) Arrange them in the order of their group also.

Discussion

5.	Explain relation between equilibrium constant and reaction quotient with explanation of the point mentioned
Answer» Explain relation between equilibrium constant and reaction quotient with explanation of the point mentioned

Discussion

6.	Explain why? [5 MARKS] (a) Anhydrous HCl is a poor conductor while aq. HCl is an excellent conductor of electricity. (b) Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled. (c) When the stopper of a bottle full of hydrogen chloride gas is opened, there are fumes in the air.
Answer» Explain why? [5 MARKS] (a) Anhydrous HCl is a poor conductor while aq. HCl is an excellent conductor of electricity. (b) Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled. (c) When the stopper of a bottle full of hydrogen chloride gas is opened, there are fumes in the air.

Discussion

7.	Write the common name of the following compound.
Answer» Write the common name of the following compound.

Discussion

8.	Name a chloride which is soluble in excess of ammonium hydroxide.
Answer» Name a chloride which is soluble in excess of ammonium hydroxide.

Discussion

9.	What can be inferred from the following equation? Na2SO4(aq)+BaCl2(aq)→BaSO4(s)+2NaCl(aq) (i) It is a displacement reaction. (ii) It is a precipitation reaction. (iii) It is a double decomposition reaction. (iv) BaSO4 is soluble in water (v) BaSO4 is a precipitate. (vi) NaCl dissolves in water.
Answer» What can be inferred from the following equation? $N a_{2} S O_{4} (a q) + B a C l_{2} (a q) \to B a S O_{4} (s) + 2 N a C l (a q)$ (i) It is a displacement reaction. (ii) It is a precipitation reaction. (iii) It is a double decomposition reaction. (iv) $B a S O_{4}$ is soluble in water (v) $B a S O_{4}$ is a precipitate. (vi) NaCl dissolves in water.

9.

What can be inferred from the following equation? Na2SO4(aq)+BaCl2(aq)→BaSO4(s)+2NaCl(aq) (i) It is a displacement reaction. (ii) It is a precipitation reaction. (iii) It is a double decomposition reaction. (iv) BaSO4 is soluble in water (v) BaSO4 is a precipitate. (vi) NaCl dissolves in water.

Answer»

What can be inferred from the following equation?

$N a_{2} S O_{4} (a q) + B a C l_{2} (a q) \to B a S O_{4} (s) + 2 N a C l (a q)$

(i) It is a displacement reaction.

(ii) It is a precipitation reaction.

(iii) It is a double decomposition reaction.

(iv) $B a S O_{4}$ is soluble in water

(v) $B a S O_{4}$ is a precipitate.

(vi) NaCl dissolves in water.

Discussion

10.	The position of three elements A, B, and C in the periodic table are shown below:Group−16Group−17−−−A−−BC(a) State whether A is a metal or non-metals .(b) State whether C is more reactive or less reactive than A.(c) Will C be larger or smaller in size then B?(d) Which type of ion, cation or anion will be formed by element A?(e) Give two examples of group 17.
Answer» The position of three elements A, B, and C in the periodic table are shown below: $\begin{matrix} G r o u p - 16 & G r o u p - 17 - & - - & A - & - B & C \end{matrix}$ (a) State whether A is a metal or non-metals . (b) State whether C is more reactive or less reactive than A. (c) Will C be larger or smaller in size then B? (d) Which type of ion, cation or anion will be formed by element A? (e) Give two examples of group 17.

Discussion

11.	Density of two gases are in ratio of 1:2 and their temperarure is in ratio 2:1 then ratio of respective pressure is? A)1:1 B)1:2 C)2:1 D)4:1
Answer» Density of two gases are in ratio of 1:2 and their temperarure is in ratio 2:1 then ratio of respective pressure is? A)1:1 B)1:2 C)2:1 D)4:1

Discussion

12.	The least metallic element of group 1 is:
Answer» The least metallic element of group 1 is:

Discussion

13.	What will be the volume of CO2 at STP (atm) obtained on heating 10 grams of 90% pure limestone?
Answer» What will be the volume of $C O_{2}$ at STP (atm) obtained on heating 10 grams of 90% pure limestone?

Discussion

14.	(a) The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.(b) What is the value of Avogadro's number?(c) What is the value of molar volume of a gas at STP?
Answer» (a) The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement. (b) What is the value of Avogadro's number? (c) What is the value of molar volume of a gas at STP?

Discussion

15.	How are metals refined by the electrolytic methods?
Answer» How are metals refined by the electrolytic methods?

Discussion

16.	what is amphoteric?
Answer» what is amphoteric?

Discussion

17.	For the given zero order reaction:A→P The initial concentration of the reactant is 0.35 mol/L and it reduces to half in 5 min. Calculate the rate constant
Answer» For the given zero order reaction: $A \to P$ The initial concentration of the reactant is $0.35 m o l / L$ and it reduces to half in $5 m i n$ . Calculate the rate constant

Discussion

18.	A mixture of oxygen and ethyne is burnt for welding can you tell why a mixture of ethyne and air is not used?
Answer» A mixture of oxygen and ethyne is burnt for welding can you tell why a mixture of ethyne and air is not used?

Discussion

19.	The oxidising agent used to convert alcohols into carboxylic acid is:
Answer» The oxidising agent used to convert alcohols into carboxylic acid is:

Discussion

20.	Will the soap molecules work equally well in other solvents like ethanol?
Answer» Will the soap molecules work equally well in other solvents like ethanol?

Discussion

21.	Ammonium carbamate dissociates as NH2COONH4=2NH3+CO2In a closed vessel containing ammonium carbamate in equilibrium ,ammonia is added such that the partial pressure of NH3 now equals to the original total pressure.the ratio of total pressure now to the original pressure is
Answer» Ammonium carbamate dissociates as NH2COONH4=2NH3+CO2 In a closed vessel containing ammonium carbamate in equilibrium ,ammonia is added such that the partial pressure of NH3 now equals to the original total pressure.the ratio of total pressure now to the original pressure is

Discussion

22.	out of following elements which is most reactive cemically B,Sr,Ca,M
Answer» out of following elements which is most reactive cemically B,Sr,Ca,M

Discussion

23.	Shiva asked surabhi to draw the structural isomers of pentane. How many structural isomers possibly she can make?
Answer» Shiva asked surabhi to draw the structural isomers of pentane. How many structural isomers possibly she can make?

Discussion

24.	What is the difference between an aromatic compound, and a compound in which aromaticity is present, but it is not maintained in resonating form?
Answer» What is the difference between an aromatic compound, and a compound in which aromaticity is present, but it is not maintained in resonating form?

Discussion

25.	Which of the following property is not shown by metals?
Answer» Which of the following property is not shown by metals?

Discussion

26.	Which of the following cannot be functional isomers?
Answer» Which of the following cannot be functional isomers?

Discussion

27.	During ionization, metals lose electrons. This change is called ______.
Answer» During ionization, metals lose electrons. This change is called ______.

Discussion

28.	27. The volume of O2 at STP required for the complete combustion of 4g CH4 is? Why cant we use mass volume relationship?
Answer» 27. The volume of O2 at STP required for the complete combustion of 4g CH4 is? Why cant we use mass volume relationship?

Discussion

29.	Sulphide lon reacts with solid sulphur2$2 (aq)+S(s)S (aq)K, =10S2 (aq)+2S(s) S(aq)KK=130The equilibrium constant for the formation of S-(aq) from S(aq) and sulphur(1) 10(2) 13(3) 130(4) 1300
Answer» Sulphide lon reacts with solid sulphur2$2 (aq)+S(s)S (aq)K, =10S2 (aq)+2S(s) S(aq)KK=130The equilibrium constant for the formation of S-(aq) from S(aq) and sulphur(1) 10(2) 13(3) 130(4) 1300

Discussion

30.	What is the color of Ferro-Ferri cyanide
Answer» What is the color of Ferro-Ferri cyanide

Discussion

31.	20. How the energy of a orbital is determined ? Is the energy of all orbitals in the shell is same !
Answer» 20. How the energy of a orbital is determined ? Is the energy of all orbitals in the shell is same !

Discussion

32.	What is physics?
Answer» What is physics?

Discussion

33.	pressure P of an ideal monoatomic gas is directly proportional to volume V .The specific heat of a gas in the process is
Answer» pressure P of an ideal monoatomic gas is directly proportional to volume V .The specific heat of a gas in the process is

Discussion

34.	Write balanced equations for the following reactions:(i) Iron (II) chloride solution with sodium hydroxide solution.(ii) Chlorine and cold dilute sodium hydroxide solution.(iii) Zinc and sodium hydroxide solution.(iv) Sulphur dioxide and sodium hydroxide solution.(Give the equation for the formation of the normal salt).
Answer» Write balanced equations for the following reactions: (i) Iron (II) chloride solution with sodium hydroxide solution. (ii) Chlorine and cold dilute sodium hydroxide solution. (iii) Zinc and sodium hydroxide solution. (iv) Sulphur dioxide and sodium hydroxide solution. (Give the equation for the formation of the normal salt).

Discussion

35.	5. 25mL of household bleach solution was mixed with 30mL of 0.50M KI and 10 mL of 4N acetic acid. In the titration of the liberated iodine, 48mL of 0.25 N Na2S2O3 was used to reach the end point. The molarity of the household bleach solution is
Answer» 5. 25mL of household bleach solution was mixed with 30mL of 0.50M KI and 10 mL of 4N acetic acid. In the titration of the liberated iodine, 48mL of 0.25 N Na2S2O3 was used to reach the end point. The molarity of the household bleach solution is

Discussion

36.	Manganese dioxide is a type of
Answer» Manganese dioxide is a type of

Discussion

37.	Can a food chain start from an animal? Give reasons.
Answer» Can a food chain start from an animal? Give reasons.

Discussion

38.	Question 17A shiny brown-colored element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.
Answer» Question 17 A shiny brown-colored element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

Discussion

39.	{ 83. }15 moles }A,18 moles of }B and }20 moles of }C}{ reacted together according to the reaction }A+28}{4C→ AB_2C_4 . The moles of }AB_2C_4 formed is
Answer» { 83. }15 moles }A,18 moles of }B and }20 moles of }C}{ reacted together according to the reaction }A+28}{4C→ AB_2C_4 . The moles of }AB_2C_4 formed is

Discussion

40.	the following data are for the decomposition of ammonium nitrate in aqueous solution volume of N2 in cc time in min 6.25 10 9.50 15 11.42 20 13.65 25 35.05 finally the order of the reaction is 1)zero 2)one 3)two 4)t
Answer» the following data are for the decomposition of ammonium nitrate in aqueous solution volume of N2 in cc time in min 6.25 10 9.50 15 11.42 20 13.65 25 35.05 finally the order of the reaction is 1)zero 2)one 3)two 4)t

Discussion

41.	How will you prepare Aqua regia from nitric acid?
Answer» How will you prepare Aqua regia from nitric acid?

Discussion

42.	Why we dont consider normal reactions while dealing with some cases of mechanical equilibrium. for eg : in derivation of principle of moments
Answer» Why we dont consider normal reactions while dealing with some cases of mechanical equilibrium. for eg : in derivation of principle of moments

Discussion

43.	An element X is in the 1st group of the modern periodic table. Its ion will be represented as:
Answer» An element X is in the $1^{s t}$ group of the modern periodic table. Its ion will be represented as:

Discussion

44.	Discuss the properties of glass.
Answer» Discuss the properties of glass.

Discussion

45.	The gas X is colourless having a foul smell of rotten eggs. It turns lead acetate paper black. Gas X is formed when zinc sulphide reacts with dilute hydrochloric acid. Name the gas X.
Answer» The gas X is colourless having a foul smell of rotten eggs. It turns lead acetate paper black. Gas X is formed when zinc sulphide reacts with dilute hydrochloric acid. Name the gas X.

Discussion

46.	Which one of the gases is responsible for causing acid rain in atmosphere?
Answer» Which one of the gases is responsible for causing acid rain in atmosphere?

Discussion

47.	A)All of theseWhat is the ratio of volume of 1 mole of nitrogento 16 g oxygen gas at STP?gas(1) 1:0.5(2) 1:0.92(3) 0.92 1(4) 0.98 1f tho valuo of oxcludod volume.
Answer» A)All of theseWhat is the ratio of volume of 1 mole of nitrogento 16 g oxygen gas at STP?gas(1) 1:0.5(2) 1:0.92(3) 0.92 1(4) 0.98 1f tho valuo of oxcludod volume.

Discussion

48.	Which of the following releases 0.2 moles ofhydrogen on hydrolysis(1) 0.1 mole of LiH(3) 0.3 mole of LiH(2) 0.2 mole of LiH(4) 0.4 mole of LiH
Answer» Which of the following releases 0.2 moles ofhydrogen on hydrolysis(1) 0.1 mole of LiH(3) 0.3 mole of LiH(2) 0.2 mole of LiH(4) 0.4 mole of LiH

Discussion

49.	ntWe know that when atoms looses electrons cations are formed and for loosing electron they should be in isolated gaseous form.But in the formation of NaCl does sodium metal changes into gaseous form before giving an electon to chlorine ?n
Answer» ntWe know that when atoms looses electrons cations are formed and for loosing electron they should be in isolated gaseous form.But in the formation of NaCl does sodium metal changes into gaseous form before giving an electon to chlorine ?n

Discussion

50.	The odour of ethanoic acid resembles with :(1) tomato juice(2) kerosene(3) orange juice(4) vinegar
Answer» The odour of ethanoic acid resembles with : (1) tomato juice (2) kerosene (3) orange juice (4) vinegar

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question 1 (iii) What are the ions present in Na2O and MgO compounds?

Why does chemical reaction occur? What are the different types of chemical reaction.

Name the alloy of zinc used in simple voltaic cells.

Question 46 (a) In this ladder (Figure 5.2) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table. (b) Arrange them in the order of their group also.

Explain relation between equilibrium constant and reaction quotient with explanation of the point mentioned

Write the common name of the following compound.​

Name a chloride which is soluble in excess of ammonium hydroxide.

What can be inferred from the following equation? Na2SO4(aq)+BaCl2(aq)→BaSO4(s)+2NaCl(aq) (i) It is a displacement reaction. (ii) It is a precipitation reaction. (iii) It is a double decomposition reaction. (iv) BaSO4 is soluble in water (v) BaSO4 is a precipitate. (vi) NaCl dissolves in water.

Density of two gases are in ratio of 1:2 and their temperarure is in ratio 2:1 then ratio of respective pressure is? A)1:1 B)1:2 C)2:1 D)4:1

The least metallic element of group 1 is:

What will be the volume of CO2 at STP (atm) obtained on heating 10 grams of 90% pure limestone?

(a) The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.(b) What is the value of Avogadro's number?(c) What is the value of molar volume of a gas at STP?

How are metals refined by the electrolytic methods?

what is amphoteric?

For the given zero order reaction:A→P The initial concentration of the reactant is 0.35 mol/L and it reduces to half in 5 min. Calculate the rate constant

A mixture of oxygen and ethyne is burnt for welding can you tell why a mixture of ethyne and air is not used?

The oxidising agent used to convert alcohols into carboxylic acid is:

Will the soap molecules work equally well in other solvents like ethanol?

Ammonium carbamate dissociates as NH2COONH4=2NH3+CO2In a closed vessel containing ammonium carbamate in equilibrium ,ammonia is added such that the partial pressure of NH3 now equals to the original total pressure.the ratio of total pressure now to the original pressure is

out of following elements which is most reactive cemically B,Sr,Ca,M

Shiva asked surabhi to draw the structural isomers of pentane. How many structural isomers possibly she can make?

What is the difference between an aromatic compound, and a compound in which aromaticity is present, but it is not maintained in resonating form?

Which of the following property is not shown by metals?

Which of the following cannot be functional isomers?

During ionization, metals lose electrons. This change is called ______.

27. The volume of O2 at STP required for the complete combustion of 4g CH4 is? Why cant we use mass volume relationship?

Sulphide lon reacts with solid sulphur2$2 (aq)+S(s)S (aq)K, =10S2 (aq)+2S(s) S(aq)KK=130The equilibrium constant for the formation of S-(aq) from S(aq) and sulphur(1) 10(2) 13(3) 130(4) 1300

What is the color of Ferro-Ferri cyanide

20. How the energy of a orbital is determined ? Is the energy of all orbitals in the shell is same !

What is physics?

pressure P of an ideal monoatomic gas is directly proportional to volume V .The specific heat of a gas in the process is

5. 25mL of household bleach solution was mixed with 30mL of 0.50M KI and 10 mL of 4N acetic acid. In the titration of the liberated iodine, 48mL of 0.25 N Na2S2O3 was used to reach the end point. The molarity of the household bleach solution is

Manganese dioxide is a type of

Can a food chain start from an animal? Give reasons.

Question 17A shiny brown-colored element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

{ 83. }15 moles }A,18 moles of }B and }20 moles of }C}{ reacted together according to the reaction }A+28}{4C→ AB_2C_4 . The moles of }AB_2C_4 formed is

the following data are for the decomposition of ammonium nitrate in aqueous solution volume of N2 in cc time in min 6.25 10 9.50 15 11.42 20 13.65 25 35.05 finally the order of the reaction is 1)zero 2)one 3)two 4)t

How will you prepare Aqua regia from nitric acid?

Why we dont consider normal reactions while dealing with some cases of mechanical equilibrium. for eg : in derivation of principle of moments

An element X is in the 1st group of the modern periodic table. Its ion will be represented as:

Discuss the properties of glass.

The gas X is colourless having a foul smell of rotten eggs. It turns lead acetate paper black. Gas X is formed when zinc sulphide reacts with dilute hydrochloric acid. Name the gas X.

Which one of the gases is responsible for causing acid rain in atmosphere?

A)All of theseWhat is the ratio of volume of 1 mole of nitrogento 16 g oxygen gas at STP?gas(1) 1:0.5(2) 1:0.92(3) 0.92 1(4) 0.98 1f tho valuo of oxcludod volume.

Which of the following releases 0.2 moles ofhydrogen on hydrolysis(1) 0.1 mole of LiH(3) 0.3 mole of LiH(2) 0.2 mole of LiH(4) 0.4 mole of LiH

ntWe know that when atoms looses electrons cations are formed and for loosing electron they should be in isolated gaseous form.But in the formation of NaCl does sodium metal changes into gaseous form before giving an electon to chlorine ?n

The odour of ethanoic acid resembles with :(1) tomato juice(2) kerosene(3) orange juice(4) vinegar

Write the common name of the following compound.