46295 + Interview Questions in Chemistry

1.	Question 1What are monomers and polymers? Give suitable examples.
Answer» Question 1 What are monomers and polymers? Give suitable examples.

1.

Question 1What are monomers and polymers? Give suitable examples.

Answer»

Question 1

What are monomers and polymers? Give suitable examples.

2.	What error does a vernier calliper have when zero mark of the vernier calliper Does not co incides with zero mark of main scale
Answer» What error does a vernier calliper have when zero mark of the vernier calliper Does not co incides with zero mark of main scale

Discussion

3.	Select correct order of electronegativity :-(1) SbF_5 (EN of Sb atom)> SbF_3(EN of Sb atom)(2) CH_4(EN of C-atom) > CO_2(EN of C-atom)(3) Cu^+ (EN) > Cu^2(EN)(4) 1 and 2 both are correct
Answer» Select correct order of electronegativity :-(1) SbF_5 (EN of Sb atom)> SbF_3(EN of Sb atom)(2) CH_4(EN of C-atom) > CO_2(EN of C-atom)(3) Cu^+ (EN) > Cu^2(EN)(4) 1 and 2 both are correct

Discussion

4.	Out of these, which cannot be maximum capacity of a shell?
Answer» Out of these, which cannot be maximum capacity of a shell?

Discussion

5.	On going down a main subgroup in the periodictable ( example Li to Cs in IA or Be to Ba in II A) the expected trend ofchange in atomic radius is a:
Answer» On going down a main subgroup in the periodic table ( example Li to Cs in IA or Be to Ba in II A) the expected trend of change in atomic radius is a:

Discussion

6.	In the crystal structure of fe3o4, fe2+ and fe3+ occupy respectively
Answer» In the crystal structure of fe3o4, fe2+ and fe3+ occupy respectively

Discussion

7.	Out of the following three solutions which has the highest freezing point and why? 1) 0.1 M urea 2) 0.1 M barium phosphate 3) 0.1 M sodium sulphate But as freezing point is a colligative property and number of particles of in 3 solutions are equal then all three should have same freezing point. how
Answer» Out of the following three solutions which has the highest freezing point and why? 1) 0.1 M urea 2) 0.1 M barium phosphate 3) 0.1 M sodium sulphate But as freezing point is a colligative property and number of particles of in 3 solutions are equal then all three should have same freezing point. how

Discussion

8.	Which of the following represent the plot of Λm vs √C for a strong electrolyte (KCl)? Λm - Molar conductivity C - concentration of electrolyte
Answer» Which of the following represent the plot of $Λ_{m}$ vs $\sqrt{C}$ for a strong electrolyte ( $K C l$ )? $Λ_{m}$ - Molar conductivity $C$ - concentration of electrolyte

Discussion

9.	How to find the direction of tension?
Answer» How to find the direction of tension?

Discussion

10.	Arrange NO+2,NO−2 and NO−3 in the decreasing order of their N−O bond lengths.
Answer» Arrange $N O_{2}^{+}, N O_{2}^{-}$ and $N O_{3}^{-}$ in the decreasing order of their $N - O$ bond lengths.

Discussion

11.	why hydrogen bond is not observed in ch_3f
Answer» why hydrogen bond is not observed in ch_3f

Discussion

12.	For the four successive transition elements (Cr, Mn, Fe and Co), what is the order of stability of their +2 states? (At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)
Answer» For the four successive transition elements (Cr, Mn, Fe and Co), what is the order of stability of their +2 states? (At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

12.

For the four successive transition elements (Cr, Mn, Fe and Co), what is the order of stability of their +2 states? (At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

Answer»

For the four successive transition elements (Cr, Mn, Fe and Co), what is the order of stability of their +2 states?

(At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

Discussion

13.	I2(excess) + NH3----?? F2(excess) + NH3----?? F2 + NH3(excess)----?? ⁩ What are the major and side products of the above reactions??
Answer» I2(excess) + NH3----?? F2(excess) + NH3----?? F2 + NH3(excess)----?? ⁩ What are the major and side products of the above reactions??

Discussion

14.	86.Why S-S bond energy is more than O-O inspite of atomic size O is less than S.As we know that bond energy is inversly proportional to atomic size??
Answer» 86.Why S-S bond energy is more than O-O inspite of atomic size O is less than S.As we know that bond energy is inversly proportional to atomic size??

Discussion

15.	If alcohols do not reat with NaOH then why does hemiacetals react
Answer» If alcohols do not reat with NaOH then why does hemiacetals react

Discussion

16.	6. There are two isotopes of an element of average mass x .The isotope with heavier atomic mass x+2 and lighter one has x-1 ,then the abundance of heavier one is?
Answer» 6. There are two isotopes of an element of average mass x .The isotope with heavier atomic mass x+2 and lighter one has x-1 ,then the abundance of heavier one is?

Discussion

17.	In hcp lattice, if a plane is drawn parallel to layers A and B, at a distance c/8 above the layer B, it passesthrough centres of x tetrahedral and y octahedral voids. A plane parallel to layer A, at a distance c/8 justbelow it passes through centres of p tetrahedral and q octahedral voids. Find (x + y + p+q). c is the cellparameter of hcp lattice, the vertical edge length. (A) 10(B) 9(C) 6(D) 14
Answer» In hcp lattice, if a plane is drawn parallel to layers A and B, at a distance c/8 above the layer B, it passesthrough centres of x tetrahedral and y octahedral voids. A plane parallel to layer A, at a distance c/8 justbelow it passes through centres of p tetrahedral and q octahedral voids. Find (x + y + p+q). c is the cellparameter of hcp lattice, the vertical edge length. (A) 10(B) 9(C) 6(D) 14

Discussion

18.	Which one of the alkaline earth metal carbonates is thermally the most stable? (a) MgCO3 (b) CaCO3 (c) SrCO3 (d) BaCO3
Answer» Which one of the alkaline earth metal carbonates is thermally the most stable? (a) MgCO₃ (b) CaCO₃ (c) SrCO₃ (d) BaCO₃

18.

Which one of the alkaline earth metal carbonates is thermally the most stable? (a) MgCO3 (b) CaCO3 (c) SrCO3 (d) BaCO3

Answer»

Which one of the alkaline earth metal
carbonates is thermally the most stable?

(a) MgCO₃
(b) CaCO₃
(c) SrCO₃
(d) BaCO₃

Discussion

19.	When a mixture of methyl iodine; ethyl iodine are heated with sodium in dry ether solvent the alkane obtained
Answer» When a mixture of methyl iodine; ethyl iodine are heated with sodium in dry ether solvent the alkane obtained

Discussion

20.	For the decomposition reaction4HNO3(g)⇌4NO2(g)+2H2O+O2(g) if we start with only the reactant HNO3 and p = equilibrium pressure, the equilibrium constant Kp is:
Answer» For the decomposition reaction $4 H N O_{3} (g) ⇌ 4 N O_{2} (g) + 2 H_{2} O + O_{2}$ (g) if we start with only the reactant $H N O_{3}$ and p = equilibrium pressure, the equilibrium constant $K_{p}$ is:

Discussion

21.	The CFSE for octahedral [CoCl6]4− is 18,000cm–1.The CFSE for tetrahedral [CoCl4]2− will be
Answer» The CFSE for octahedral $[C o C l_{6}]^{4 -}$ is $18, 000 c m^{- 1}$ . The CFSE for tetrahedral $[C o C l_{4}]^{2 -}$ will be

Discussion

22.	In the following reaction sequence, metal (A)+N2Δ⟶(B)−H2O⟶(C)+(D) white ppt (C) is formed and gas (D) is evolved. White ppt (C) dissolves in NaOH solution, while gas (D) gives white fumes in HCl Metal A is
Answer» In the following reaction sequence, metal $(A) + N_{2} Δ ⟶ (B) - H_{2} O ⟶ (C) + (D)$ white ppt (C) is formed and gas (D) is evolved. White ppt (C) dissolves in NaOH solution, while gas (D) gives white fumes in HCl Metal A is

Discussion

23.	the de broglie wavelength for helium atom at room temp is
Answer» the de broglie wavelength for helium atom at room temp is

Discussion

24.	7. An ionic compound is made up of A and B only ions AOccopy all the corners and alternate edges centres while atoms B occupy all the face center the formula of compound will be
Answer» 7. An ionic compound is made up of A and B only ions AOccopy all the corners and alternate edges centres while atoms B occupy all the face center the formula of compound will be

Discussion

25.	What is the difference between the notations: z^(+m) and z^(m+)(here let us say 'z' is a element with valancy say: '+m')what does these notations show (iff they are not same) ?
Answer» What is the difference between the notations: z^(+m) and z^(m+) (here let us say 'z' is a element with valancy say: '+m') what does these notations show (iff they are not same) ?

Discussion

26.	The percentage rise in temperature needed to expand a gas by 40% at constant pressure is_________
Answer» The percentage rise in temperature needed to expand a gas by 40% at constant pressure is_________

Discussion

27.	Electric charge q , q and -2q respectively are placed at three corners of an equilateral triangle of side a. Magnitude of the electric dipole moment of the system is 1.\sqrt2 qa 2. \sqrt3 qa 3. qa 4. 2qa
Answer» Electric charge q , q and -2q respectively are placed at three corners of an equilateral triangle of side a. Magnitude of the electric dipole moment of the system is 1.\sqrt2 qa 2. \sqrt3 qa 3. qa 4. 2qa

Discussion

28.	among the follow8ng the energy of 2s orbital lowest inLi,H,Na,
Answer» among the follow8ng the energy of 2s orbital lowest inLi,H,Na,

Discussion

29.	Does the rate of equilibrium reaction change if we alter its concentration, pressure or temperature??
Answer» Does the rate of equilibrium reaction change if we alter its concentration, pressure or temperature??

Discussion

30.	Two solutions having same osmotic pressure at a given temperature are called
Answer» Two solutions having same osmotic pressure at a given temperature are called

Discussion

31.	At700 K, equilibrium constant for the reactionis54.8. If 0.5 molL–1of HI(g)is present at equilibrium at 700 K, what are the concentration ofH2(g)and I2(g)assuming that we initially started with HI(g)and allowed it to reach equilibrium at 700 K?
Answer» At 700 K, equilibrium constant for the reaction is 54.8. If 0.5 molL^–1 of HI₍_g₎ is present at equilibrium at 700 K, what are the concentration of H₂₍_g₎ and I₂₍_g₎ assuming that we initially started with HI₍_g₎ and allowed it to reach equilibrium at 700 K?

31.

At700 K, equilibrium constant for the reactionis54.8. If 0.5 molL–1of HI(g)is present at equilibrium at 700 K, what are the concentration ofH2(g)and I2(g)assuming that we initially started with HI(g)and allowed it to reach equilibrium at 700 K?

Answer»

At
700 K, equilibrium constant for the reaction

is
54.8. If 0.5 molL^–1
of HI₍_g₎
is present at equilibrium at 700 K, what are the concentration of
H₂₍_g₎
and I₂₍_g₎
assuming that we initially started with HI₍_g₎
and allowed it to reach equilibrium at 700 K?

Discussion

32.	Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to
Answer» Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to

Discussion

33.	What is hydrocarbon
Answer» What is hydrocarbon

Discussion

34.	On what factors does equilibrium depends on?
Answer» On what factors does equilibrium depends on?

Discussion

35.	22. 50ml of 0.1M NaOH &0.10M H2SO4 what is volume mixed with so that whose solution make his molarity 0.050M of H2SO4 1)400ml 2)50ml 3)100ml 4)150ml
Answer» 22. 50ml of 0.1M NaOH &0.10M H2SO4 what is volume mixed with so that whose solution make his molarity 0.050M of H2SO4 1)400ml 2)50ml 3)100ml 4)150ml

Discussion

36.	Which of the following represent the Sawhorse projection of butane molecule ?
Answer» Which of the following represent the Sawhorse projection of butane molecule ?

Discussion

37.	In 3-methyl-2-cyclohexenon which hydrogen cannot undergo deuterium exchange when it reacts with CH3O⊕/CH3OD ?
Answer» In 3-methyl-2-cyclohexenon which hydrogen cannot undergo deuterium exchange when it reacts with $C H_{3} O^{\oplus} / C H_{3} O D$ ?

Discussion

38.	Which of the following compounds has the largest equilibrium constant for the addition of water?
Answer» Which of the following compounds has the largest equilibrium constant for the addition of water?

Discussion

39.	Draw all the structural isomers of c3h6o2.
Answer» Draw all the structural isomers of c3h6o2.

Discussion

40.	How many moles and how many grams of HCl are present in 250cm3 of 0.5M HCl solution?
Answer» How many moles and how many grams of HCl are present in 250cm3 of 0.5M HCl solution?

Discussion

41.	the metre is defined as the distance travelled by light in 1/299792458 of a second. why didnt people choose some easier number such as 1 / 3000000000 of a second?
Answer» the metre is defined as the distance travelled by light in 1/299792458 of a second. why didnt people choose some easier number such as 1 / 3000000000 of a second?

Discussion

42.	The number of hydroxyl group(s) in Q is
Answer» The number of hydroxyl group(s) in Q is

Discussion

43.	What is the correct relationship between the pH of isomer solutions of sodium oxide, Na2O (pH1), sodium sulphide, Na2S (pH2) sodium selenide, Na2Se (pH3) and sodium telluride Na2Te (pH4)?
Answer» What is the correct relationship between the $p H$ of isomer solutions of sodium oxide, $N a_{2} O (p H_{1}), sodium sulphide, N a_{2} S (p H_{2})$ $sodium selenide, N a_{2} S e (p H_{3})$ $and sodium telluride N a_{2} T e (p H_{4}) ?$

Discussion

44.	Acetic acid is weaker than chloroacetic acid. Give reason.
Answer» Acetic acid is weaker than chloroacetic acid. Give reason.

Discussion

45.	What is oxidation number of each atom in ZnNH4PO4?
Answer» What is oxidation number of each atom in $Z n N H_{4} P O_{4}$ ?

Discussion

46.	Why is FeO(s) not formed is stoichiometric composition ?
Answer» Why is FeO(s) not formed is stoichiometric composition ?

Discussion

47.	Percentage weightage of chemistry in nee
Answer» Percentage weightage of chemistry in nee

Discussion

48.	Calculate the enthalpy of formation of anhydrous Al2Cl6 from the following data:1. 2Al(s)+6HCl(aq)------Al2Cl6(aq)+3H2(g)=1004.2kj.kj /mol2.H2(g) +Cl2(g)------- 2Hcl(g) =184.1kj /mol3.HCl(g)+aq------ HCl(aq)=73.2 kj/mol4.Al2Cl6(s) + aq-------- Al2Cl6(aq) =643.1 kj /mol
Answer» Calculate the enthalpy of formation of anhydrous Al2Cl6 from the following data: 1. 2Al(s)+6HCl(aq)------Al2Cl6(aq)+3H2(g)=1004.2kj.kj /mol 2.H2(g) +Cl2(g)------- 2Hcl(g) =184.1kj /mol 3.HCl(g)+aq------ HCl(aq)=73.2 kj/mol 4.Al2Cl6(s) + aq-------- Al2Cl6(aq) =643.1 kj /mol

Discussion

49.	Formula of finding nodal planes?
Answer» Formula of finding nodal planes?

Discussion

50.	The vapour pressure of a solution having 2.0 gram of solute X in hundred gram of CS2 is it 848.9 torr. the molecular formula of the solute is
Answer» The vapour pressure of a solution having 2.0 gram of solute X in hundred gram of CS2 is it 848.9 torr. the molecular formula of the solute is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question 1What are monomers and polymers? Give suitable examples.

What error does a vernier calliper have when zero mark of the vernier calliper Does not co incides with zero mark of main scale

Select correct order of electronegativity :-(1) SbF_5 (EN of Sb atom)> SbF_3(EN of Sb atom)(2) CH_4(EN of C-atom) > CO_2(EN of C-atom)(3) Cu^+ (EN) > Cu^2(EN)(4) 1 and 2 both are correct

Out of these, which cannot be maximum capacity of a shell?

On going down a main subgroup in the periodictable ( example Li to Cs in IA or Be to Ba in II A) the expected trend ofchange in atomic radius is a:

In the crystal structure of fe3o4, fe2+ and fe3+ occupy respectively

Out of the following three solutions which has the highest freezing point and why? 1) 0.1 M urea 2) 0.1 M barium phosphate 3) 0.1 M sodium sulphate But as freezing point is a colligative property and number of particles of in 3 solutions are equal then all three should have same freezing point. how

Which of the following represent the plot of Λm vs √C for a strong electrolyte (KCl)? Λm - Molar conductivity C - concentration of electrolyte

How to find the direction of tension?

Arrange NO+2,NO−2 and NO−3 in the decreasing order of their N−O bond lengths.

why hydrogen bond is not observed in ch_3f

For the four successive transition elements (Cr, Mn, Fe and Co), what is the order of stability of their +2 states? (At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

I2(excess) + NH3----?? F2(excess) + NH3----?? F2 + NH3(excess)----?? ⁩ What are the major and side products of the above reactions??

86.Why S-S bond energy is more than O-O inspite of atomic size O is less than S.As we know that bond energy is inversly proportional to atomic size??

If alcohols do not reat with NaOH then why does hemiacetals react

6. There are two isotopes of an element of average mass x .The isotope with heavier atomic mass x+2 and lighter one has x-1 ,then the abundance of heavier one is?

Which one of the alkaline earth metal carbonates is thermally the most stable? (a) MgCO3 (b) CaCO3 (c) SrCO3 (d) BaCO3

When a mixture of methyl iodine; ethyl iodine are heated with sodium in dry ether solvent the alkane obtained

For the decomposition reaction4HNO3(g)⇌4NO2(g)+2H2O+O2(g) if we start with only the reactant HNO3 and p = equilibrium pressure, the equilibrium constant Kp is:

The CFSE for octahedral [CoCl6]4− is 18,000cm–1.The CFSE for tetrahedral [CoCl4]2− will be

In the following reaction sequence, metal (A)+N2Δ⟶(B)−H2O⟶(C)+(D) white ppt (C) is formed and gas (D) is evolved. White ppt (C) dissolves in NaOH solution, while gas (D) gives white fumes in HCl Metal A is

the de broglie wavelength for helium atom at room temp is

7. An ionic compound is made up of A and B only ions AOccopy all the corners and alternate edges centres while atoms B occupy all the face center the formula of compound will be

What is the difference between the notations: z^(+m) and z^(m+)(here let us say 'z' is a element with valancy say: '+m')what does these notations show (iff they are not same) ?

The percentage rise in temperature needed to expand a gas by 40% at constant pressure is_________

Electric charge q , q and -2q respectively are placed at three corners of an equilateral triangle of side a. Magnitude of the electric dipole moment of the system is 1.\sqrt2 qa 2. \sqrt3 qa 3. qa 4. 2qa

among the follow8ng the energy of 2s orbital lowest inLi,H,Na,

Does the rate of equilibrium reaction change if we alter its concentration, pressure or temperature??

Two solutions having same osmotic pressure at a given temperature are called

At700 K, equilibrium constant for the reactionis54.8. If 0.5 molL–1of HI(g)is present at equilibrium at 700 K, what are the concentration ofH2(g)and I2(g)assuming that we initially started with HI(g)and allowed it to reach equilibrium at 700 K?

Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to

What is hydrocarbon

On what factors does equilibrium depends on?

22. 50ml of 0.1M NaOH &0.10M H2SO4 what is volume mixed with so that whose solution make his molarity 0.050M of H2SO4 1)400ml 2)50ml 3)100ml 4)150ml

Which of the following represent the Sawhorse projection of butane molecule ?

In 3-methyl-2-cyclohexenon which hydrogen cannot undergo deuterium exchange when it reacts with CH3O⊕/CH3OD ?

Which of the following compounds has the largest equilibrium constant for the addition of water?

Draw all the structural isomers of c3h6o2.

How many moles and how many grams of HCl are present in 250cm3 of 0.5M HCl solution?

the metre is defined as the distance travelled by light in 1/299792458 of a second. why didnt people choose some easier number such as 1 / 3000000000 of a second?

The number of hydroxyl group(s) in Q is

What is the correct relationship between the pH of isomer solutions of sodium oxide, Na2O (pH1), sodium sulphide, Na2S (pH2) sodium selenide, Na2Se (pH3) and sodium telluride Na2Te (pH4)?

Acetic acid is weaker than chloroacetic acid. Give reason.

What is oxidation number of each atom in ZnNH4PO4?

Why is FeO(s) not formed is stoichiometric composition ?

Percentage weightage of chemistry in nee

Calculate the enthalpy of formation of anhydrous Al2Cl6 from the following data:1. 2Al(s)+6HCl(aq)------Al2Cl6(aq)+3H2(g)=1004.2kj.kj /mol2.H2(g) +Cl2(g)------- 2Hcl(g) =184.1kj /mol3.HCl(g)+aq------ HCl(aq)=73.2 kj/mol4.Al2Cl6(s) + aq-------- Al2Cl6(aq) =643.1 kj /mol

Formula of finding nodal planes?

The vapour pressure of a solution having 2.0 gram of solute X in hundred gram of CS2 is it 848.9 torr. the molecular formula of the solute is