46295 + Interview Questions in Chemistry

1.	In which of the following octahedral complexes of Co (Z = 27) will the magnitude of Δ0 be the highest?
Answer» In which of the following octahedral complexes of $C o$ (Z = 27) will the magnitude of $Δ_{0}$ be the highest?

Discussion

2.	How to chemically distinguish between Chlorobenzene and Cyclohexyl chloride?
Answer» How to chemically distinguish between Chlorobenzene and Cyclohexyl chloride?

Discussion

3.	79 What is the hybridisation of Be in its covalent polymeric hydride (BeH2)n?
Answer» 79 What is the hybridisation of Be in its covalent polymeric hydride (BeH2)n?

Discussion

4.	The periodic table consists of 18 periods. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in periodic table:6329Cu+11H→610n+α+211H+X
Answer» The periodic table consists of 18 periods. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element $X$ as shown below. To which group, element $X$ belongs in periodic table: $_{29}^{63} C u +_{1}^{1} H \to 6_{0}^{1} n + α + 2_{1}^{1} H + X$

Discussion

5.	28. How to determine coordination number of a compound?
Answer» 28. How to determine coordination number of a compound?

Discussion

6.	Which of the following is/are true about interstitial compounds:
Answer» Which of the following is/are true about interstitial compounds:

Discussion

7.	What percent of a sample of Nitrogen must be allowed to escape if its temperature pressure and volume are to be changed from 220 degree Celsius , 3 atm and 1.65 litre to 110 degree celsius ,0.7 atm and 1 litre respectively please give explanation with answer
Answer» What percent of a sample of Nitrogen must be allowed to escape if its temperature pressure and volume are to be changed from 220 degree Celsius , 3 atm and 1.65 litre to 110 degree celsius ,0.7 atm and 1 litre respectively please give explanation with answer

Discussion

8.	In an atom, an electron is moving with a speed of 250 m/s which is measured with an accuracy of 0.001 %. Certainty with which the position of the electron can be located is:(h=6.6×10−34 kg m2 s−1,Mass of electron=9.1×10−31 kg)
Answer» In an atom, an electron is moving with a speed of 250 m/s which is measured with an accuracy of 0.001 %. Certainty with which the position of the electron can be located is: $(h = 6.6 \times 10^{- 34} k g m^{2} s^{- 1}, Mass of electron = 9.1 \times 10^{- 31} k g)$

Discussion

9.	A particle A of mass ′m′ and charge ′q′ is accelerated by a potential difference of 50 V. Another particle B of mass ′4m′ and charge ′q′ is accelerated by a potential difference of 2500 V. The ratio of de - broglie wavelength λAλB is
Answer» A particle $A$ of mass $^{'} m^{'}$ and charge $^{'} q^{'}$ is accelerated by a potential difference of $50 V$ . Another particle $B$ of mass $^{'} 4 m^{'}$ and charge $^{'} q^{'}$ is accelerated by a potential difference of $2500 V .$ The ratio of de - broglie wavelength $\frac{λ_{A}}{λ_{B}}$ is

Discussion

10.	The reaction, A(g) + 2B(g) → C(g) is an elementary reaction. In an experiment involving this reaction, the initial partial pressures of A & B are PA = 0.40 atm, PB = 1 atm. When PC = 0.3 atm, the rate of reaction relative to initial rate is
Answer» The reaction, A(g) + 2B(g) → C(g) is an elementary reaction. In an experiment involving this reaction, the initial partial pressures of A & B are PA = 0.40 atm, PB = 1 atm. When PC = 0.3 atm, the rate of reaction relative to initial rate is

Discussion

11.	Which of the following represents correct order of increasing electron gain enthalpy with negative sign for the elements 0, S, F and Cl? [CBSE AIPMT 2010]
Answer» Which of the following represents correct order of increasing electron gain enthalpy with negative sign for the elements 0, S, F and Cl? [CBSE AIPMT 2010]

Discussion

12.	An electrolyte
Answer» An electrolyte

Discussion

13.	Using the standard electrode potential, find out the pair between which redox reaction is not feasible. E⊖values : Fe3+Fe2+=+0.77I2I−=+0.54;Cu2+Cu=+0.34Ag+Ag=+0.80V (a) Fe3+ and I− (b) Ag+ and Cu (c) Fe3+ and Cu (d) Ag and Fe3+
Answer» Using the standard electrode potential, find out the pair between which redox reaction is not feasible. $E ⊖$ values : $\frac{F e^{3 +}}{F e^{2 +}} = + 0.77 \frac{I_{2}}{I^{-}} = + 0.54; \frac{C u^{2 +}}{C u} = + 0.34 \frac{A g^{+}}{A g} = + 0.80 V$ (a) $F e^{3 +}$ and $I^{-}$ (b) $A g^{+}$ and Cu (c) $F e^{3 +}$ and Cu (d) Ag and $F e^{3 +}$

13.

Using the standard electrode potential, find out the pair between which redox reaction is not feasible. E⊖values : Fe3+Fe2+=+0.77I2I−=+0.54;Cu2+Cu=+0.34Ag+Ag=+0.80V (a) Fe3+ and I− (b) Ag+ and Cu (c) Fe3+ and Cu (d) Ag and Fe3+

Answer»

Using the standard electrode potential, find out the pair between which redox reaction is not feasible.

$E ⊖$ values :

$\frac{F e^{3 +}}{F e^{2 +}} = + 0.77 \frac{I_{2}}{I^{-}} = + 0.54; \frac{C u^{2 +}}{C u} = + 0.34 \frac{A g^{+}}{A g} = + 0.80 V$

(a) $F e^{3 +}$ and $I^{-}$
(b) $A g^{+}$ and Cu
(c) $F e^{3 +}$ and Cu
(d) Ag and $F e^{3 +}$

Discussion

14.	2A+3B→4C+5DStarting with 7 moles of A, 6 moles of B. Find the moles of C and D formed respectively.
Answer» $2 A + 3 B \to 4 C + 5 D$ Starting with 7 moles of $A$ , 6 moles of $B$ . Find the moles of $C$ and $D$ formed respectively.

Discussion

15.	Low heat cement consists lower percentage of which of the following?
Answer» Low heat cement consists lower percentage of which of the following?

Discussion

16.	RCONH2 when treated with LiAlH4 /H2O yield
Answer» RCONH2 when treated with LiAlH4 /H2O yield

Discussion

17.	One mole of an ideal monoatomic gas is heated at a constant pressure of one atmosphere from 0∘ to 100∘C then the change in the internal energy is
Answer» One mole of an ideal monoatomic gas is heated at a constant pressure of one atmosphere from $0^{\circ}$ to $100^{\circ} C$ then the change in the internal energy is

Discussion

18.	Which of the following pairs of compounds are isoelectronic and isostructural?
Answer» Which of the following pairs of compounds are isoelectronic and isostructural?

Discussion

19.	cDNA is made from:
Answer» cDNA is made from:

Discussion

20.	8 Categorise the following function of time cossot as(a) S.H.M.(b) Periodic but not S.H.M. Also find the period.
Answer» 8 Categorise the following function of time cossot as(a) S.H.M.(b) Periodic but not S.H.M. Also find the period.

Discussion

21.	Reaction of carboxylic acid with amine
Answer» Reaction of carboxylic acid with amine

Discussion

22.	Why does atomic radius depend on Zeff?
Answer» Why does atomic radius depend on Zeff?

Discussion

23.	van der Waals' constants of two gases X and Y are as given: a(L2atm mol−2)b(L mol−1)Gas X5.60.065Gas Y5.10.012 Which option is true?
Answer» van der Waals' constants of two gases $X$ and $Y$ are as given: $\begin{matrix} a (L^{2} a t m {mol}^{- 2}) & b ({L mol}^{- 1}) Gas X & 5.6 & 0.065 Gas Y & 5.1 & 0.012 \end{matrix}$ Which option is true?

Discussion

24.	100 g of Caco3 on heating reacts with 1 litre 1N hcl .on completion of reaction masS ofCO2 liberated is
Answer» 100 g of Caco3 on heating reacts with 1 litre 1N hcl .on completion of reaction masS ofCO2 liberated is

Discussion

25.	The percentage of an element M is 64 in its oxide of molecular ormula M2O3. The atomic mass of M is about?
Answer» The percentage of an element M is 64 in its oxide of molecular ormula M2O3. The atomic mass of M is about?

Discussion

26.	In which of the following molecules resonance takes place through out the entire system?
Answer» In which of the following molecules resonance takes place through out the entire system?

Discussion

27.	Difference between molarity, molality and normality.
Answer» Difference between molarity, molality and normality.

Discussion

28.	In which of the following case the bulb will not glow?
Answer» In which of the following case the bulb will not glow?

Discussion

29.	for H2 gas ,Cp-Cv=a and for O2 gas Cp-Cv=b, so the relation between and b i
Answer» for H2 gas ,Cp-Cv=a and for O2 gas Cp-Cv=b, so the relation between and b i

Discussion

30.	Solubility of a salt AmBn in water is ?
Answer» Solubility of a salt AmBn in water is ?

Discussion

31.	iron electrodes is dipped in iron sulphate solution.determine the product of electrolysis at anode and cathode
Answer» iron electrodes is dipped in iron sulphate solution. determine the product of electrolysis at anode and cathode

Discussion

32.	Which fluorescent material was used in Thomson’s cathode ray experiment?
Answer» Which fluorescent material was used in Thomson’s cathode ray experiment?

Discussion

33.	What are reducing sugars?
Answer» What are reducing sugars?

Discussion

34.	Which of the following ions is the most stable in aqueous solution (1) Cr^{3+} (2) V^{3+} (3) Ti^{3+} (4) Mn^{3+
Answer» Which of the following ions is the most stable in aqueous solution (1) Cr^{3+} (2) V^{3+} (3) Ti^{3+} (4) Mn^{3+

Discussion

35.	Which of the following graphs represents an exothermic reaction?
Answer» Which of the following graphs represents an exothermic reaction?

Discussion

36.	The ratio of the speed of the electron in the first Bohr orbit of hydrogen to the speed of light, is equal to, (where e, h and c have their usual meaning. Consider CGS units for all quantities involved)
Answer» The ratio of the speed of the electron in the first Bohr orbit of hydrogen to the speed of light, is equal to, (where $e, h$ and $c$ have their usual meaning. Consider $C G S$ units for all quantities involved)

Discussion

37.	The charge on the electron was found out by
Answer» The charge on the electron was found out by

Discussion

38.	83.What are quarks? What is the role of quarks in an atom? Are there different types of quarks? Give a diagram showing quarks in an atom.
Answer» 83.What are quarks? What is the role of quarks in an atom? Are there different types of quarks? Give a diagram showing quarks in an atom.

Discussion

39.	In the reaction sequence: The molar mass (g) of the major product Y is .
Answer» In the reaction sequence: The molar mass (g) of the major product Y is .

Discussion

40.	What are electron deficient compounds? Are BCl3 and SiCl4 electron deficient species? Explain.
Answer» What are electron deficient compounds? Are BCl₃ and SiCl₄ electron deficient species? Explain.

Discussion

41.	If the bond energies of C-H , C≡C , O=O , C=O and O-H bonds are p , q , r , s , t respectively ( 1 ) [ 8s + 4t ] - [ 4p + q + 5r ] ( 2 ) [ 4p + 2q + 5r ] - [ 8s + 4t ] ( 3 ) [ 4p + 2q + 5r + 8s + 4t ] ( 4 ) [ 2p + q + 5r ] - [ 8s + 4t ]
Answer» If the bond energies of C-H , C≡C , O=O , C=O and O-H bonds are p , q , r , s , t respectively ( 1 ) [ 8s + 4t ] - [ 4p + q + 5r ] ( 2 ) [ 4p + 2q + 5r ] - [ 8s + 4t ] ( 3 ) [ 4p + 2q + 5r + 8s + 4t ] ( 4 ) [ 2p + q + 5r ] - [ 8s + 4t ]

Discussion

42.	What is the definition of one parsec?
Answer» What is the definition of one parsec?

Discussion

43.	Ernst Haeckel vs Karl Ernst von Baer theory
Answer» Ernst Haeckel vs Karl Ernst von Baer theory

Discussion

44.	Arrange the following according to decreasing order of reactivity towards HBr.
Answer» Arrange the following according to decreasing order of reactivity towards $H B r$ .

Discussion

45.	7.Why CO3 2- Considered as a non dative bond explain
Answer» 7.Why CO3 2- Considered as a non dative bond explain

Discussion

46.	39.Through 0.1M CH3COONa , 500ml solution ,0.965A current is passed for 500 sec then calculate (1) Total volume of gases liberated at STP (2)why van Hoff factor remains same? Give reason (3)osmotic pressure at 27degree celcius (4) volume of 0.01M HCl to neutralize it?
Answer» 39.Through 0.1M CH3COONa , 500ml solution ,0.965A current is passed for 500 sec then calculate (1) Total volume of gases liberated at STP (2)why van Hoff factor remains same? Give reason (3)osmotic pressure at 27degree celcius (4) volume of 0.01M HCl to neutralize it?

Discussion

47.	how many grams of CaCo3 are required to react with 98g (25% pure) H2So4 ?
Answer» how many grams of CaCo3 are required to react with 98g (25% pure) H2So4 ?

Discussion

48.	18. Trend ofBasicity order of gp 1and gp 2elements oxide and the reason
Answer» 18. Trend ofBasicity order of gp 1and gp 2elements oxide and the reason

Discussion

49.	The total number of stereoisomers possible for 2,3 - Dichlorobutane:
Answer» The total number of stereoisomers possible for $2, 3$ - Dichlorobutane:

Discussion

50.

Match the following:RulesStatementsA) Hund's rule of maximum multiplicityP) No two electrons in an atom can have the same set of quantum numbersB) Aufbau principleQ) Half-filled and completely filled orbitals have extra stabilityC) Pauli's exclusion principleR) Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupiedD) Hiesenberg's Uncertainity PrincipleS) It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously T) In the ground state of atoms, orbitals are filled in the order of their increasing energies

Answer»

Match the following:

Rules	Statements
A) Hund's rule of maximum multiplicity	P) No two electrons in an atom can have the same set of quantum numbers
B) Aufbau principle	Q) Half-filled and completely filled orbitals have extra stability
C) Pauli's exclusion principle	R) Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupied
D) Hiesenberg's Uncertainity Principle	S) It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously
	T) In the ground state of atoms, orbitals are filled in the order of their increasing energies

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In which of the following octahedral complexes of Co (Z = 27) will the magnitude of Δ0 be the highest?

How to chemically distinguish between Chlorobenzene and Cyclohexyl chloride?

79 What is the hybridisation of Be in its covalent polymeric hydride (BeH2)n?

The periodic table consists of 18 periods. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in periodic table:6329Cu+11H→610n+α+211H+X

28. How to determine coordination number of a compound?

Which of the following is/are true about interstitial compounds:

What percent of a sample of Nitrogen must be allowed to escape if its temperature pressure and volume are to be changed from 220 degree Celsius , 3 atm and 1.65 litre to 110 degree celsius ,0.7 atm and 1 litre respectively please give explanation with answer

In an atom, an electron is moving with a speed of 250 m/s which is measured with an accuracy of 0.001 %. Certainty with which the position of the electron can be located is:(h=6.6×10−34 kg m2 s−1,Mass of electron=9.1×10−31 kg)

A particle A of mass ′m′ and charge ′q′ is accelerated by a potential difference of 50 V. Another particle B of mass ′4m′ and charge ′q′ is accelerated by a potential difference of 2500 V. The ratio of de - broglie wavelength λAλB is

The reaction, A(g) + 2B(g) → C(g) is an elementary reaction. In an experiment involving this reaction, the initial partial pressures of A & B are PA = 0.40 atm, PB = 1 atm. When PC = 0.3 atm, the rate of reaction relative to initial rate is

Which of the following represents correct order of increasing electron gain enthalpy with negative sign for the elements 0, S, F and Cl? [CBSE AIPMT 2010]

An electrolyte

Using the standard electrode potential, find out the pair between which redox reaction is not feasible. E⊖values : Fe3+Fe2+=+0.77I2I−=+0.54;Cu2+Cu=+0.34Ag+Ag=+0.80V (a) Fe3+ and I− (b) Ag+ and Cu (c) Fe3+ and Cu (d) Ag and Fe3+

2A+3B→4C+5DStarting with 7 moles of A, 6 moles of B. Find the moles of C and D formed respectively.

Low heat cement consists lower percentage of which of the following?

RCONH2 when treated with LiAlH4 /H2O yield

One mole of an ideal monoatomic gas is heated at a constant pressure of one atmosphere from 0∘ to 100∘C then the change in the internal energy is

Which of the following pairs of compounds are isoelectronic and isostructural?

cDNA is made from:

8 Categorise the following function of time cossot as(a) S.H.M.(b) Periodic but not S.H.M. Also find the period.

Reaction of carboxylic acid with amine

Why does atomic radius depend on Zeff?

van der Waals' constants of two gases X and Y are as given: a(L2atm mol−2)b(L mol−1)Gas X5.60.065Gas Y5.10.012 Which option is true?

100 g of Caco3 on heating reacts with 1 litre 1N hcl .on completion of reaction masS ofCO2 liberated is

The percentage of an element M is 64 in its oxide of molecular ormula M2O3. The atomic mass of M is about?

In which of the following molecules resonance takes place through out the entire system?

Difference between molarity, molality and normality.

In which of the following case the bulb will not glow?

for H2 gas ,Cp-Cv=a and for O2 gas Cp-Cv=b, so the relation between and b i

Solubility of a salt AmBn in water is ?

iron electrodes is dipped in iron sulphate solution.determine the product of electrolysis at anode and cathode

Which fluorescent material was used in Thomson’s cathode ray experiment?

What are reducing sugars?

Which of the following ions is the most stable in aqueous solution (1) Cr^{3+} (2) V^{3+} (3) Ti^{3+} (4) Mn^{3+

Which of the following graphs represents an exothermic reaction?

The ratio of the speed of the electron in the first Bohr orbit of hydrogen to the speed of light, is equal to, (where e, h and c have their usual meaning. Consider CGS units for all quantities involved)

The charge on the electron was found out by

83.What are quarks? What is the role of quarks in an atom? Are there different types of quarks? Give a diagram showing quarks in an atom.

In the reaction sequence: The molar mass (g) of the major product Y is .

What are electron deficient compounds? Are BCl3 and SiCl4 electron deficient species? Explain.

If the bond energies of C-H , C≡C , O=O , C=O and O-H bonds are p , q , r , s , t respectively ( 1 ) [ 8s + 4t ] - [ 4p + q + 5r ] ( 2 ) [ 4p + 2q + 5r ] - [ 8s + 4t ] ( 3 ) [ 4p + 2q + 5r + 8s + 4t ] ( 4 ) [ 2p + q + 5r ] - [ 8s + 4t ]

What is the definition of one parsec?

Ernst Haeckel vs Karl Ernst von Baer theory

Arrange the following according to decreasing order of reactivity towards HBr.

7.Why CO3 2- Considered as a non dative bond explain

39.Through 0.1M CH3COONa , 500ml solution ,0.965A current is passed for 500 sec then calculate (1) Total volume of gases liberated at STP (2)why van Hoff factor remains same? Give reason (3)osmotic pressure at 27degree celcius (4) volume of 0.01M HCl to neutralize it?

how many grams of CaCo3 are required to react with 98g (25% pure) H2So4 ?

18. Trend ofBasicity order of gp 1and gp 2elements oxide and the reason

The total number of stereoisomers possible for 2,3 - Dichlorobutane: