46295 + Interview Questions in Chemistry

1.	Select the pair of chain isomers.
Answer» Select the pair of chain isomers.

Discussion

2.	How do you account for the strong reducing power of lithium in aqueous solution?
Answer» How do you account for the strong reducing power of lithium in aqueous solution?

Discussion

3.	What is the mass of 3.01×1022 molecules of NH3?
Answer» What is the mass of $3.01 \times 10^{22}$ molecules of $N H_{3}$ ?

Discussion

4.	Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure (in atm), if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol.K)
Answer» Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure (in atm), if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol.K)

Discussion

5.	The boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide assuming 84% dimerization of the acid, where boiling point and Kb of CS2 being 46.2∘C and 2.3 K kg mol−1 is :
Answer» The boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide assuming $84 %$ dimerization of the acid, where boiling point and Kb of $C S_{2}$ being ${46.2}^{\circ} C$ and $2.3 K k g m o l^{- 1}$ is :

Discussion

6.	Ethane is heated as 400∘C under high pressure, the product(s) are
Answer» Ethane is heated as $400^{\circ} C$ under high pressure, the product(s) are

Discussion

7.	HF is weak acid in comparison to HBr, HCl and HI due to
Answer» HF is weak acid in comparison to HBr, HCl and HI due to

Discussion

8.	A fixed mass of ideal gas undergoes changes of pressure and volume starting at L, as shown in the figure Which of the following is correct?
Answer» A fixed mass of ideal gas undergoes changes of pressure and volume starting at L, as shown in the figure Which of the following is correct?

Discussion

9.	In the reaction HAsO2+Sn2+→As+Sn4+H2O, oxidising agent is
Answer» In the reaction $H A s O_{2} + S n^{2 +} \to A s + S n^{4} + H_{2} O$ , oxidising agent is

Discussion

10.	For the 1s orbital of the Hydrogen atom, the radial wave function is given as: R(r)=1√π(1a0)32e−ra0 (Where a0=0.529 ∘A) The ratio of radial probability density of finding an electron at r=a0 to the radial probability density of finding an electron at the nucleus is given as (x.e−y). Calculate the value of (x+y).
Answer» For the $1 s$ orbital of the Hydrogen atom, the radial wave function is given as: $R (r) = \frac{1}{\sqrt{π}} {(\frac{1}{a_{0}})}^{\frac{3}{2}} e^{\frac{- r}{a_{0}}}$ (Where $a_{0} = 0.529 \circ A$ ) The ratio of radial probability density of finding an electron at $r = a_{0}$ to the radial probability density of finding an electron at the nucleus is given as $(x . e^{- y})$ . Calculate the value of $(x + y)$ .

10.

For the 1s orbital of the Hydrogen atom, the radial wave function is given as: R(r)=1√π(1a0)32e−ra0 (Where a0=0.529 ∘A) The ratio of radial probability density of finding an electron at r=a0 to the radial probability density of finding an electron at the nucleus is given as (x.e−y). Calculate the value of (x+y).

Answer»

For the $1 s$ orbital of the Hydrogen atom, the radial wave function is given as:
$R (r) = \frac{1}{\sqrt{π}} {(\frac{1}{a_{0}})}^{\frac{3}{2}} e^{\frac{- r}{a_{0}}}$ (Where $a_{0} = 0.529 \circ A$ )

The ratio of radial probability density of finding an electron at $r = a_{0}$ to the radial probability density of finding an electron at the nucleus is given as $(x . e^{- y})$ .
Calculate the value of $(x + y)$ .

Discussion

11.	Tc and Pc of a gas are 400 K and 41 atm respectively, Vc is:
Answer» $T_{c}$ and $P_{c}$ of a gas are $400 K$ and $41$ atm respectively, $V_{c}$ is:

Discussion

12.	According to Bronsted - Lowry's Acids and Bases concept, select the species which can act as an acid as well as a base ?
Answer» According to Bronsted - Lowry's Acids and Bases concept, select the species which can act as an acid as well as a base ?

Discussion

13.	Which of the following gives white precipitate when treated with silver nitrate solution?
Answer» Which of the following gives white precipitate when treated with silver nitrate solution?

Discussion

14.	The noble gas that was discovered first on sun and then on earth is:
Answer» The noble gas that was discovered first on sun and then on earth is:

Discussion

15.	A compound ‘X’ reacts with small quantity of water and silica and gives a product which have square pyramidal geometry. Compound X will be:
Answer» A compound ‘X’ reacts with small quantity of water and silica and gives a product which have square pyramidal geometry. Compound X will be:

Discussion

16.	Identify (B) in the above reaction:
Answer» Identify (B) in the above reaction:

Discussion

17.	Find (C).
Answer» Find (C).

Discussion

18.	The crystal system of a compound with unit cell dimension a = 0.387, b = 0.387 and c = 0.504nm and α=β=90∘ and γ=120∘ is
Answer» The crystal system of a compound with unit cell dimension a = 0.387, b = 0.387 and c = 0.504nm and $α = β = 90^{\circ} a n d γ = 120^{\circ}$ is

Discussion

19.	If de-Broglie wavelength of an electron in the nth Bohr orbit is λn and angular momentum is Jn, then
Answer» If de-Broglie wavelength of an electron in the nth Bohr orbit is $λ_{n}$ and angular momentum is $J_{n}$ , then

Discussion

20.	Which of the following species is not resonance stabilized?
Answer» Which of the following species is not resonance stabilized?

Discussion

21.	List-I contains compound and List-II has their isomeric relationship: Choose the correct option from the following considering List-I and List-II:
Answer» List-I contains compound and List-II has their isomeric relationship: Choose the correct option from the following considering List-I and List-II:

Discussion

22.	Which of the following does not have eight valence electrons?
Answer» Which of the following does not have eight valence electrons?

Discussion

23.	Number of oxygen shared in neosilicates is a, in sorosilicate is b, cyclosilicates is c, phylosilicate is d and tectosilicates is e. Then a+b+c+d+e is
Answer» Number of oxygen shared in neosilicates is a, in sorosilicate is b, cyclosilicates is c, phylosilicate is d and tectosilicates is e. Then $a + b + c + d + e$ is

Discussion

24.	What is the correct product of the following reaction?
Answer» What is the correct product of the following reaction?

Discussion

25.	CCl3CH=CH2Cl2+H2O−−−−−−→P Identify major product 'P'.
Answer» $C C l_{3} C H = C H_{2} C l_{2} + H_{2} O - ----- \to P$ Identify major product 'P'.

Discussion

26.	Identify the product D in the following reaction sequence:
Answer» Identify the product D in the following reaction sequence:

Discussion

27.	What is the effect of lone pair on bond length?
Answer» What is the effect of lone pair on bond length?

Discussion

28.	The IUPAC name of the compound
Answer» The IUPAC name of the compound

28.

The IUPAC name of the compound

Answer»

The IUPAC name of the compound

Discussion

29.	Correct relationship is:
Answer» Correct relationship is:

Discussion

30.	At 373 K, steam and water are in equilibrium and △vapH=40.98 kJ mol−1. What will be entropy change for conversion of water into steam? H2O(l)→H2O(g)
Answer» At 373 K, steam and water are in equilibrium and $△_{v a p} H = 40.98 k J m o l^{- 1} .$ What will be entropy change for conversion of water into steam? $H_{2} O_{(l)} \to H_{2} O_{(g)}$

Discussion

31.	When 0.0976 g of magnesium was heated in air, 0.1627 g of magnesium oxide (MgO) was produced. What is the mass of oxygen needed to produce 0.1627 g of MgO?
Answer» When 0.0976 g of magnesium was heated in air, 0.1627 g of magnesium oxide $(M g O)$ was produced. What is the mass of oxygen needed to produce 0.1627 g of $M g O$ ?

Discussion

32.	AnilineNaNO2−−−−→HClACuCN−−−−→BH2−→NiCHNO2−−−−→D Product D is:
Answer» $Aniline N a N O_{2} - --- \to H C l A C u C N - --- \to B H_{2} - \to N i C H N O_{2} - --- \to D$ Product D is:

Discussion

33.	Oxidation of thiosulphate (S2O2−3) ion by iodine gives
Answer» Oxidation of thiosulphate $(S_{2} O_{3}^{2 -})$ ion by iodine gives

Discussion

34.	Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight
Answer» Which of the following is not formed by the reaction of Cl₂on CH₄in sunlight

Discussion

35.	Calculate the molality of a 1.5 M aqueous salt solution in a solvent X, if the mole fraction of the salt in the solution is 0.25. (Molar mass of solvent = 40 g/mol)
Answer» Calculate the molality of a 1.5 M aqueous salt solution in a solvent X, if the mole fraction of the salt in the solution is 0.25. (Molar mass of solvent = 40 g/mol)

Discussion

36.	The electronic configuration of an element is 1s22s22p63s23p3 What is the atomic number of the element which is just below the above element in the periodic table?
Answer» The electronic configuration of an element is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}$ What is the atomic number of the element which is just below the above element in the periodic table?

Discussion

37.	In a gamma decay process,the internal energy of a nucleus of mass M decreases,a gamma photon of energy E and linear momentum Ec is emitted and the nucleus recoils.Find the decrease in internal energy.
Answer» In a gamma decay process,the internal energy of a nucleus of mass M decreases,a gamma photon of energy E and linear momentum $\frac{E}{c}$ is emitted and the nucleus recoils.Find the decrease in internal energy.

Discussion

38.	When a solution of specific conductance 1.342 Sm−1 was placed in a conductivity cell with parallel electrodes, the resistance was found to be 170.5 ohm. The area of the electrodes is 1.86×10−4 m2 . Calculate the distance between the electrodes.
Answer» When a solution of specific conductance $1.342 {Sm}^{- 1}$ was placed in a conductivity cell with parallel electrodes, the resistance was found to be $170.5 ohm$ . The area of the electrodes is $1.86 \times 10^{- 4} m^{2}$ . Calculate the distance between the electrodes.

Discussion

39.	An atom with high electron affinity generally has
Answer» An atom with high electron affinity generally has

Discussion

40.	Why an aquatic animals are more comfortable in cold water in comparison to the hot water
Answer» Why an aquatic animals are more comfortable in cold water in comparison to the hot water

Discussion

41.	If the degree of unsaturation present in compound A is x and that of B is y and C is z, then find the value of x+y+z.
Answer» If the degree of unsaturation present in compound A is x and that of B is y and C is z, then find the value of x+y+z.

Discussion

42.	Paulings scale application formula and questions related to electronegativity using pauling scale
Answer» Paulings scale application formula and questions related to electronegativity using pauling scale

Discussion

43.	Explain the basis of classification of elements in periodic table.
Answer» Explain the basis of classification of elements in periodic table.

Discussion

44.	Vehicle moving in foggy weather use yellow colour headlight? Why not red, as it was least scatter?
Answer» Vehicle moving in foggy weather use yellow colour headlight? Why not red, as it was least scatter?

Discussion

45.	If heat energy is invisible then how are we able to see flame? Is not flame heat?
Answer» If heat energy is invisible then how are we able to see flame? Is not flame heat?

Discussion

46.	The correct order of atomic size of C,N,P,S follows the order
Answer» The correct order of atomic size of $C, N, P, S$ follows the order

Discussion

47.	In the following reaction which substance is oxidised and which one is reduced? I2+NaOH→NaIO3+NaI+H2O
Answer» In the following reaction which substance is oxidised and which one is reduced? $I_{2} + N a O H \to N a I O_{3} + N a I + H_{2} O$

Discussion

48.	The major product obtained in the following reaction is:
Answer» The major product obtained in the following reaction is:

Discussion

49.	The correct order of stability for the following species is:
Answer» The correct order of stability for the following species is:

Discussion

50.	Which of the following has largest number of isomers?
Answer» Which of the following has largest number of isomers?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Select the pair of chain isomers.

How do you account for the strong reducing power of lithium in aqueous solution?

What is the mass of 3.01×1022 molecules of NH3?

Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure (in atm), if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol.K)

The boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide assuming 84% dimerization of the acid, where boiling point and Kb of CS2 being 46.2∘C and 2.3 K kg mol−1 is :

Ethane is heated as 400∘C under high pressure, the product(s) are

HF is weak acid in comparison to HBr, HCl and HI due to

A fixed mass of ideal gas undergoes changes of pressure and volume starting at L, as shown in the figure Which of the following is correct?

In the reaction HAsO2+Sn2+→As+Sn4+H2O, oxidising agent is

Tc and Pc of a gas are 400 K and 41 atm respectively, Vc is:

According to Bronsted - Lowry's Acids and Bases concept, select the species which can act as an acid as well as a base ?

Which of the following gives white precipitate when treated with silver nitrate solution?

The noble gas that was discovered first on sun and then on earth is:

A compound ‘X’ reacts with small quantity of water and silica and gives a product which have square pyramidal geometry. Compound X will be:

Identify (B) in the above reaction:

Find (C).

The crystal system of a compound with unit cell dimension a = 0.387, b = 0.387 and c = 0.504nm and α=β=90∘ and γ=120∘ is

If de-Broglie wavelength of an electron in the nth Bohr orbit is λn and angular momentum is Jn, then

Which of the following species is not resonance stabilized?

List-I contains compound and List-II has their isomeric relationship: Choose the correct option from the following considering List-I and List-II:

Which of the following does not have eight valence electrons?

Number of oxygen shared in neosilicates is a, in sorosilicate is b, cyclosilicates is c, phylosilicate is d and tectosilicates is e. Then a+b+c+d+e is

What is the correct product of the following reaction?

CCl3CH=CH2Cl2+H2O−−−−−−→P Identify major product 'P'.

Identify the product D in the following reaction sequence:

What is the effect of lone pair on bond length?

The IUPAC name of the compound

Correct relationship is:

At 373 K, steam and water are in equilibrium and △vapH=40.98 kJ mol−1. What will be entropy change for conversion of water into steam? H2O(l)→H2O(g)

When 0.0976 g of magnesium was heated in air, 0.1627 g of magnesium oxide (MgO) was produced. What is the mass of oxygen needed to produce 0.1627 g of MgO?

AnilineNaNO2−−−−→HClACuCN−−−−→BH2−→NiCHNO2−−−−→D Product D is:

Oxidation of thiosulphate (S2O2−3) ion by iodine gives

Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight

Calculate the molality of a 1.5 M aqueous salt solution in a solvent X, if the mole fraction of the salt in the solution is 0.25. (Molar mass of solvent = 40 g/mol)

The electronic configuration of an element is 1s22s22p63s23p3 What is the atomic number of the element which is just below the above element in the periodic table?

In a gamma decay process,the internal energy of a nucleus of mass M decreases,a gamma photon of energy E and linear momentum Ec is emitted and the nucleus recoils.Find the decrease in internal energy.

When a solution of specific conductance 1.342 Sm−1 was placed in a conductivity cell with parallel electrodes, the resistance was found to be 170.5 ohm. The area of the electrodes is 1.86×10−4 m2 . Calculate the distance between the electrodes.

An atom with high electron affinity generally has

Why an aquatic animals are more comfortable in cold water in comparison to the hot water

If the degree of unsaturation present in compound A is x and that of B is y and C is z, then find the value of x+y+z.

Paulings scale application formula and questions related to electronegativity using pauling scale

Explain the basis of classification of elements in periodic table.

Vehicle moving in foggy weather use yellow colour headlight? Why not red, as it was least scatter?

If heat energy is invisible then how are we able to see flame? Is not flame heat?

The correct order of atomic size of C,N,P,S follows the order

In the following reaction which substance is oxidised and which one is reduced? I2+NaOH→NaIO3+NaI+H2O

The major product obtained in the following reaction is:

The correct order of stability for the following species is:

Which of the following has largest number of isomers?