46295 + Interview Questions in Chemistry

1.	For a certain first order reaction,75% of the reaction complete in 30 min. how much time it require to complete 99.95 of the reaction?
Answer» For a certain first order reaction,75% of the reaction complete in 30 min. how much time it require to complete 99.95 of the reaction?

Discussion

2.	In covalent bonds, are bonds formed between electrons of same spin or parallel spin?
Answer» In covalent bonds, are bonds formed between electrons of same spin or parallel spin?

Discussion

3.	Calculatethe mass of ascorbic acid (Vitamin C, C6H8O6)to be dissolved in 75 g of acetic acid to lower its melting pointby 1.5°C. Kf= 3.9 K kg mol−1.
Answer» Calculate the mass of ascorbic acid (Vitamin C, C₆H₈O₆) to be dissolved in 75 g of acetic acid to lower its melting point by 1.5°C. K_f = 3.9 K kg mol⁻¹.

Discussion

4.	Calculate: a) First excitation energy of the electron in the hydrogen atom. b) Ionisation energy of the hydrogen atom.
Answer» Calculate: a) First excitation energy of the electron in the hydrogen atom. b) Ionisation energy of the hydrogen atom.

Discussion

5.	In the reaction : A+2B⇔C+2D the Initial rate −d[A]dt at t = 0 was found to be 2.6×10−2Msec−1. What is the value of −d[B]dt at t = 0 in Msec−1?
Answer» In the reaction : $A + 2 B \Leftrightarrow C + 2 D$ the Initial rate $\frac{- d [A]}{d t}$ at t = 0 was found to be $2.6 \times 10^{- 2} M s e c^{- 1} .$ What is the value of $\frac{- d [B]}{d t}$ at t = 0 in Msec $^{- 1}$ ?

Discussion

6.	1.05 grams of metal carbonate on heating gives 0.5 grams of metal oxide. What will be the equivalent weight of the metal and metal carbonate?
Answer» 1.05 grams of metal carbonate on heating gives 0.5 grams of metal oxide. What will be the equivalent weight of the metal and metal carbonate?

Discussion

7.	Limiting value of equivalent cond uctance of BaSO,BaCl, and H2SO are X, Y and Z respectively.Equivalent conductance of HCI at infinite dilution is
Answer» Limiting value of equivalent cond uctance of BaSO,BaCl, and H2SO are X, Y and Z respectively.Equivalent conductance of HCI at infinite dilution is

Discussion

8.	Sky looks blue due to [MNR 1986; MP PET 1992]
Answer» Sky looks blue due to [MNR 1986; MP PET 1992]

Discussion

9.	If x-a/b+c + x-b/c+a + x-c/a+b = 3, then the value of x is?
Answer» If x-a/b+c + x-b/c+a + x-c/a+b = 3, then the value of x is?

Discussion

10.	What are the characteristics of an Ideal fuel?
Answer» What are the characteristics of an Ideal fuel?

Discussion

11.	46.how many exchange pairs are possible in p5 configuration and how?
Answer» 46.how many exchange pairs are possible in p5 configuration and how?

Discussion

12.	What are noble metals? Give some examples.
Answer» What are noble metals? Give some examples.

Discussion

13.	ntfor a reaction ATOB half life=50min,if reactant conc is halfed than half life period is 25min ,order of reaction?n
Answer» ntfor a reaction ATOB half life=50min,if reactant conc is halfed than half life period is 25min ,order of reaction?n

Discussion

14.	The chemical properties of an element are determined by the number of electrons in its atom, which in turn is determined by the number of protons. So can we say that the chemical properties of an element are determined by the number of protons?
Answer» The chemical properties of an element are determined by the number of electrons in its atom, which in turn is determined by the number of protons. So can we say that the chemical properties of an element are determined by the number of protons?

14.

The chemical properties of an element are determined by the number of electrons in its atom, which in turn is determined by the number of protons. So can we say that the chemical properties of an element are determined by the number of protons?

Answer»

The chemical properties of an element are determined by the number of electrons in its atom, which in turn is determined by the number of protons.

So can we say that the chemical properties of an element are determined by the number of protons?

Discussion

15.	A mixture of monoatomic gas (n1 moles) and diatomic gas (n2 moles) has CPCV equal to 117. Then
Answer» A mixture of monoatomic gas ( $n_{1}$ moles) and diatomic gas ( $n_{2}$ moles) has $\frac{C_{P}}{C_{V}}$ equal to $\frac{11}{7}$ . Then

Discussion

16.	a 1st order reaction complete 60% in 20 min the time required for the complection of 90%of reaction is aproximately:
Answer» a 1st order reaction complete 60% in 20 min the time required for the complection of 90%of reaction is aproximately:

Discussion

17.	10 g of MnO2on reaction with HCI forms 2.24 L of Cl,(g) at NTP, the percentage impurity of MnO2 is MnO2+4HCI = MnCl2+Cl2+ 2H2
Answer» 10 g of MnO2on reaction with HCI forms 2.24 L of Cl,(g) at NTP, the percentage impurity of MnO2 is MnO2+4HCI = MnCl2+Cl2+ 2H2

Discussion

18.	which of the following has higher density iridium or osmium?
Answer» which of the following has higher density iridium or osmium?

Discussion

19.	Given alongside is the diagram of an experimental set-up :(a) What is the objective of this experiment ?(b) Will it work satifactorily? Give reason.(c) What alteration(s) will you make in it for obtaining expected result ?(d) Would you take any step before starting the experiment? Describe this step and explain its necessity.
Answer» Given alongside is the diagram of an experimental set-up : (a) What is the objective of this experiment ? (b) Will it work satifactorily? Give reason. (c) What alteration(s) will you make in it for obtaining expected result ? (d) Would you take any step before starting the experiment? Describe this step and explain its necessity.

19.

Given alongside is the diagram of an experimental set-up :(a) What is the objective of this experiment ?(b) Will it work satifactorily? Give reason.(c) What alteration(s) will you make in it for obtaining expected result ?(d) Would you take any step before starting the experiment? Describe this step and explain its necessity.

Answer»

Given alongside is the diagram of an experimental set-up :

(a) What is the objective of this experiment ?

(b) Will it work satifactorily? Give reason.

(c) What alteration(s) will you make in it for obtaining expected result ?

(d) Would you take any step before starting the experiment? Describe this step and explain its necessity.

Discussion

20.	Nacl solid is doped with 0.1 mole % Al3+ ion . Calculate cationic vacancies in 5 mole Nacl .
Answer» Nacl solid is doped with 0.1 mole % Al3+ ion . Calculate cationic vacancies in 5 mole Nacl .

Discussion

21.	Fraction of an atom present at edge centre in a cubic unit cell isएक घनीय एकक कोष्ठिका में कोर केन्द्र पर उपस्थित एक परमाणु का प्रभाज क्या होता है?
Answer» Fraction of an atom present at edge centre in a cubic unit cell is एक घनीय एकक कोष्ठिका में कोर केन्द्र पर उपस्थित एक परमाणु का प्रभाज क्या होता है?

Discussion

22.	Aq.soln (blue in color) gives A green ppt with KF A bright green with aq.Kcl.explain
Answer» Aq.soln (blue in color) gives A green ppt with KF A bright green with aq.Kcl.explain

Discussion

23.	For a reversible adiabatic ideal gas expansion, the value of dPP is equal to:
Answer» For a reversible adiabatic ideal gas expansion, the value of $\frac{d P}{P}$ is equal to:

Discussion

24.	Choose the synonym of the word. Witty
Answer» Choose the synonym of the word. Witty

24.

Choose the synonym of the word. Witty

Answer»

Choose the synonym of the word.

Witty

Discussion

25.	Discuss the trends in chemical reactivity of group 15 elements.
Answer» Discuss the trends in chemical reactivity of group 15 elements.

Discussion

26.	2.why antiaromatic compounds are paramagnetic in nature ?
Answer» 2.why antiaromatic compounds are paramagnetic in nature ?

Discussion

27.	why does lone pairs occupy equitorial position in ClF_{3 } molecule
Answer» why does lone pairs occupy equitorial position in ClF_{3 } molecule

Discussion

28.	35. What is singlet and triplet oxygen?? What are the differences between them (on the basis of magnetism, reactivity etc.)
Answer» 35. What is singlet and triplet oxygen?? What are the differences between them (on the basis of magnetism, reactivity etc.)

Discussion

29.	39. What is the volume of ammonia produced when 4 L of N2 and 1 L of H2 is used in Haber's process?
Answer» 39. What is the volume of ammonia produced when 4 L of N2 and 1 L of H2 is used in Haber's process?

Discussion

30.	In a given reaction A -> 2B. As time proceeds which of the following is incorrect?(A) [A] decreases and [B] increases(A) Rate of disappearance of A decreases while rate of appearance of B increases.(C) Rate of disappearance of A increases and rate of appearance of B decreases.(D) Rate with respect to A and B remain same.
Answer» In a given reaction A -> 2B. As time proceeds which of the following is incorrect? (A) [A] decreases and [B] increases (A) Rate of disappearance of A decreases while rate of appearance of B increases. (C) Rate of disappearance of A increases and rate of appearance of B decreases. (D) Rate with respect to A and B remain same.

Discussion

31.	39. 2-methylpropanal can give cannizzaro reaction but chloral (CCl3CHO) can not. Why?
Answer» 39. 2-methylpropanal can give cannizzaro reaction but chloral (CCl3CHO) can not. Why?

Discussion

32.	how to find oxidation no. of element in compound of exceptions without drawing the structure
Answer» how to find oxidation no. of element in compound of exceptions without drawing the structure

Discussion

33.	are adsorption isotherms only valid for the cases in which the adsorbate is gas
Answer» are adsorption isotherms only valid for the cases in which the adsorbate is gas

Discussion

34.	The vapour density of completely dissociated NH4Cl would be -
Answer» The vapour density of completely dissociated NH₄Cl would be -

Discussion

35.	The C-C-Cl angle is 1, 1, 2,2-tetrachloroethene and tetrachloromethane respectively(1) 109.5 and 90(2) 120 and 109.5(3)90^° and 109.5(4)109.5^° and 120^°
Answer» The C-C-Cl angle is 1, 1, 2,2-tetrachloroethene and tetrachloromethane respectively(1) 109.5 and 90(2) 120 and 109.5(3)90^° and 109.5(4)109.5^° and 120^°

Discussion

36.	S†an dard electrode potentials are : Fe^{2+}\vert Fe (E^0=-0.44),Fe^{3+}\vert Fe^{2+}(E^0=0.77V) Fe^{2+},Fe^{3+} and Fe blocks are kept together then (1) Fe^{3+ }increases (2) Fe^{2+ }increases (3) Fe^{2+}/Fe^{3+ }remains unchanged (4) Fe^{2+ }deccreased
Answer» S†an dard electrode potentials are : Fe^{2+}\vert Fe (E^0=-0.44),Fe^{3+}\vert Fe^{2+}(E^0=0.77V) Fe^{2+},Fe^{3+} and Fe blocks are kept together then (1) Fe^{3+ }increases (2) Fe^{2+ }increases (3) Fe^{2+}/Fe^{3+ }remains unchanged (4) Fe^{2+ }deccreased

Discussion

37.	100 ml of each HCl solution having pH = 5 and NaOH having pH = 8 is mixture. How much volume ofN/100 NaOH is required to neutralise to 20 ml of this mixture?
Answer» 100 ml of each HCl solution having pH = 5 and NaOH having pH = 8 is mixture. How much volume of N/100 NaOH is required to neutralise to 20 ml of this mixture?

Discussion

38.	Is iron amphoteric ? If yes then why?
Answer» Is iron amphoteric ? If yes then why?

Discussion

39.	The treatment of sodium phenoxide with CO2 at 400 K and 4 - 7 atmosphere pressure followed by acidification of the reaction product gives
Answer» The treatment of sodium phenoxide with $C O_{2}$ at 400 K and 4 - 7 atmosphere pressure followed by acidification of the reaction product gives

Discussion

40.	what is the de-broglie wavelength associated with the hydrogen electron in its third orbi
Answer» what is the de-broglie wavelength associated with the hydrogen electron in its third orbi

Discussion

41.	What is formula of conservation of momentum?
Answer» What is formula of conservation of momentum?

Discussion

42.	what is the value of (a u b u c) ∩ (a ∩ b' ∩ c')' ∩ c'?
Answer» what is the value of (a u b u c) ∩ (a ∩ b' ∩ c')' ∩ c'?

Discussion

43.	15. .An organic compound having molecular mass 60 is found to contain C=20%, H=6.67% and N=46.67% while rest is oxygen.On heating it gives NH3 along with a solid residue give voilet color with alkaline copper sulphate solution.Determine the compound?
Answer» 15. .An organic compound having molecular mass 60 is found to contain C=20%, H=6.67% and N=46.67% while rest is oxygen.On heating it gives NH3 along with a solid residue give voilet color with alkaline copper sulphate solution.Determine the compound?

Discussion

44.	Formation of 2-butene as major product by dehydration of 2-butanol is according to
Answer» Formation of 2-butene as major product by dehydration of 2-butanol is according to

44.

Formation of 2-butene as major product by dehydration of 2-butanol is according to

Answer»

Formation of 2-butene as major product by dehydration of 2-butanol is according to

Discussion

45.	30. Why CCl_4 is molecular solids still it is bonded covalently.so it should be covalent solid.
Answer» 30. Why CCl_4 is molecular solids still it is bonded covalently.so it should be covalent solid.

Discussion

46.	1.A column of Mercury of length h=10 cm is contained in the middle of a narrow horizontal table of length 1m closed at ends. The air in both halves of the tube is under a pressure on Po=76 cm of Mercury. The tube is now slowly made vertical. The distance moved by Mercury will be (1) 4.5 cm (2) 3.0 cm (3) 2.5 cm (4) 1.2 cm
Answer» 1.A column of Mercury of length h=10 cm is contained in the middle of a narrow horizontal table of length 1m closed at ends. The air in both halves of the tube is under a pressure on Po=76 cm of Mercury. The tube is now slowly made vertical. The distance moved by Mercury will be (1) 4.5 cm (2) 3.0 cm (3) 2.5 cm (4) 1.2 cm

Discussion

47.	Question 13Chlorine reacts with saturated hydrocarbons at room temperature in the(a) absence of sunlight(b) presence of sunlight(c) presence of water(d) presence of hydrochloric acid
Answer» Question 13 Chlorine reacts with saturated hydrocarbons at room temperature in the (a) absence of sunlight (b) presence of sunlight (c) presence of water (d) presence of hydrochloric acid

Discussion

48.	Relative humidity of air is 80% at 27∘C. If the aqueous tension at the same temperature is 27mmHg, partial pressure of water vapour in the air is
Answer» Relative humidity of air is 80% at $27^{\circ} C$ . If the aqueous tension at the same temperature is 27mmHg, partial pressure of water vapour in the air is

Discussion

49.	How to calculate number of atoms of copper present in 19.7g of 22carat gold?
Answer» How to calculate number of atoms of copper present in 19.7g of 22carat gold?

Discussion

50.	What would be the stoichiometric coefficient of P and HNO3 respectively, in the net balanced equation for the given redox reaction: P+HNO3→HPO3+NO+H2O
Answer» What would be the stoichiometric coefficient of $P$ and $H N O_{3}$ respectively, in the net balanced equation for the given redox reaction: $P + H N O_{3} \to H P O_{3} + N O + H_{2} O$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

For a certain first order reaction,75% of the reaction complete in 30 min. how much time it require to complete 99.95 of the reaction?

In covalent bonds, are bonds formed between electrons of same spin or parallel spin?

Calculatethe mass of ascorbic acid (Vitamin C, C6H8O6)to be dissolved in 75 g of acetic acid to lower its melting pointby 1.5°C. Kf= 3.9 K kg mol−1.

Calculate: a) First excitation energy of the electron in the hydrogen atom. b) Ionisation energy of the hydrogen atom.

In the reaction : A+2B⇔C+2D the Initial rate −d[A]dt at t = 0 was found to be 2.6×10−2Msec−1. What is the value of −d[B]dt at t = 0 in Msec−1?

1.05 grams of metal carbonate on heating gives 0.5 grams of metal oxide. What will be the equivalent weight of the metal and metal carbonate?

Limiting value of equivalent cond uctance of BaSO,BaCl, and H2SO are X, Y and Z respectively.Equivalent conductance of HCI at infinite dilution is

Sky looks blue due to [MNR 1986; MP PET 1992]

If x-a/b+c + x-b/c+a + x-c/a+b = 3, then the value of x is?

What are the characteristics of an Ideal fuel?

46.how many exchange pairs are possible in p5 configuration and how?

What are noble metals? Give some examples.

ntfor a reaction ATOB half life=50min,if reactant conc is halfed than half life period is 25min ,order of reaction?n

The chemical properties of an element are determined by the number of electrons in its atom, which in turn is determined by the number of protons. So can we say that the chemical properties of an element are determined by the number of protons?

A mixture of monoatomic gas (n1 moles) and diatomic gas (n2 moles) has CPCV equal to 117. Then

a 1st order reaction complete 60% in 20 min the time required for the complection of 90%of reaction is aproximately:

10 g of MnO2on reaction with HCI forms 2.24 L of Cl,(g) at NTP, the percentage impurity of MnO2 is MnO2+4HCI = MnCl2+Cl2+ 2H2

which of the following has higher density iridium or osmium?

Nacl solid is doped with 0.1 mole % Al3+ ion . Calculate cationic vacancies in 5 mole Nacl .

Fraction of an atom present at edge centre in a cubic unit cell isएक घनीय एकक कोष्ठिका में कोर केन्द्र पर उपस्थित एक परमाणु का प्रभाज क्या होता है?

Aq.soln (blue in color) gives A green ppt with KF A bright green with aq.Kcl.explain

For a reversible adiabatic ideal gas expansion, the value of dPP is equal to:

Choose the synonym of the word. Witty

Discuss the trends in chemical reactivity of group 15 elements.

2.why antiaromatic compounds are paramagnetic in nature ?

why does lone pairs occupy equitorial position in ClF_{3 } molecule

35. What is singlet and triplet oxygen?? What are the differences between them (on the basis of magnetism, reactivity etc.)

39. What is the volume of ammonia produced when 4 L of N2 and 1 L of H2 is used in Haber's process?

39. 2-methylpropanal can give cannizzaro reaction but chloral (CCl3CHO) can not. Why?

how to find oxidation no. of element in compound of exceptions without drawing the structure

are adsorption isotherms only valid for the cases in which the adsorbate is gas

The vapour density of completely dissociated NH4Cl would be -

The C-C-Cl angle is 1, 1, 2,2-tetrachloroethene and tetrachloromethane respectively(1) 109.5 and 90(2) 120 and 109.5(3)90^° and 109.5(4)109.5^° and 120^°

S†an dard electrode potentials are : Fe^{2+}\vert Fe (E^0=-0.44),Fe^{3+}\vert Fe^{2+}(E^0=0.77V) Fe^{2+},Fe^{3+} and Fe blocks are kept together then (1) Fe^{3+ }increases (2) Fe^{2+ }increases (3) Fe^{2+}/Fe^{3+ }remains unchanged (4) Fe^{2+ }deccreased

100 ml of each HCl solution having pH = 5 and NaOH having pH = 8 is mixture. How much volume ofN/100 NaOH is required to neutralise to 20 ml of this mixture?

Is iron amphoteric ? If yes then why?

The treatment of sodium phenoxide with CO2 at 400 K and 4 - 7 atmosphere pressure followed by acidification of the reaction product gives

what is the de-broglie wavelength associated with the hydrogen electron in its third orbi

What is formula of conservation of momentum?

what is the value of (a u b u c) ∩ (a ∩ b' ∩ c')' ∩ c'?

15. .An organic compound having molecular mass 60 is found to contain C=20%, H=6.67% and N=46.67% while rest is oxygen.On heating it gives NH3 along with a solid residue give voilet color with alkaline copper sulphate solution.Determine the compound?

Formation of 2-butene as major product by dehydration of 2-butanol is according to

30. Why CCl_4 is molecular solids still it is bonded covalently.so it should be covalent solid.

Question 13Chlorine reacts with saturated hydrocarbons at room temperature in the(a) absence of sunlight(b) presence of sunlight(c) presence of water(d) presence of hydrochloric acid

Relative humidity of air is 80% at 27∘C. If the aqueous tension at the same temperature is 27mmHg, partial pressure of water vapour in the air is

How to calculate number of atoms of copper present in 19.7g of 22carat gold?

What would be the stoichiometric coefficient of P and HNO3 respectively, in the net balanced equation for the given redox reaction: P+HNO3→HPO3+NO+H2O