5083 + Interview Questions in Chemistry Page 38 InterviewSolution

1851.	What will be the E0 value for the given half cell reaction? Fe3+(aq)+3e−→Fe(s)Given:E0 value for the half cell reaction, Fe3+(aq)+e−→Fe2+(aq); E0=0.77 VFe2+(aq)+2e−→Fe(s); E0=−0.44 V
Answer» What will be the $E^{0}$ value for the given half cell reaction? $F e^{3 +} (a q) + 3 e^{-} \to F e (s)$ Given: $E^{0}$ value for the half cell reaction, $F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{0} = 0.77 V$ $F e^{2 +} (a q) + 2 e^{-} \to F e (s); E^{0} = - 0.44 V$

Discussion

1852.	Sheela cooked rice in a rice cooker. What kind of change took place? (i) Irreversible change (ii) Endothermic change (iii) Natural change
Answer» Sheela cooked rice in a rice cooker. What kind of change took place? (i) Irreversible change (ii) Endothermic change (iii) Natural change

Discussion

1853.	what is intensity in simple words
Answer» what is intensity in simple words

Discussion

1854.	Blending a smoothie, for example, involves two physical changes: the change in shape of each fruit and the mixing together of many different pieces of fruit. But the outcome of this blending is not at all the same as the original fruit. So can you justify why it cannot be termed as a chemical change? [3 MARKS]
Answer» Blending a smoothie, for example, involves two physical changes: the change in shape of each fruit and the mixing together of many different pieces of fruit. But the outcome of this blending is not at all the same as the original fruit. So can you justify why it cannot be termed as a chemical change? [3 MARKS]

Discussion

1855.	(a) Name one indicator which turns red on adding an acid.(b) Name one indicator which turns red on adding a base.
Answer» (a) Name one indicator which turns red on adding an acid. (b) Name one indicator which turns red on adding a base.

1855.

(a) Name one indicator which turns red on adding an acid.(b) Name one indicator which turns red on adding a base.

Answer»

(a) Name one indicator which turns red on adding an acid.

(b) Name one indicator which turns red on adding a base.

Discussion

1856.	Burst out the bubbles containing oxides that cause acid rain.
Answer» Burst out the bubbles containing oxides that cause acid rain.

Discussion

1857.	The excess energy over the average energy of the reactant molecules to be possessed by the reactants to convert themselves into the products in a reaction is known as
Answer» The excess energy over the average energy of the reactant molecules to be possessed by the reactants to convert themselves into the products in a reaction is known as

Discussion

1858.	according to octet rule the compound which contain ionic ,covalent and coordinate bond . HOW TO KNOW. IS IT POSSIBLE TO KNOW BY DRAWING ITS ORBITAL DIAGRAM. how to solve such problems 1CaSO4 2.NH4Cl 3.NaNO3 4ALL
Answer» according to octet rule the compound which contain ionic ,covalent and coordinate bond . HOW TO KNOW. IS IT POSSIBLE TO KNOW BY DRAWING ITS ORBITAL DIAGRAM. how to solve such problems 1CaSO4 2.NH4Cl 3.NaNO3 4ALL

Discussion

1859.	Question 3Name the sodium compound which is used for softening hard water.
Answer» Question 3 Name the sodium compound which is used for softening hard water.

Discussion

1860.	In plant respiration, Glucose + ___ → Carbon Dioxide + Water
Answer» In plant respiration, Glucose + ___ → Carbon Dioxide + Water

Discussion

1861.	Change of state from ice to water and to steam has been shown below. What type of change is involved in the given picture?
Answer» Change of state from ice to water and to steam has been shown below. What type of change is involved in the given picture?

Discussion

1862.	1.Draw born haber cycle for the formation of KCL crystal.
Answer» 1.Draw born haber cycle for the formation of KCL crystal.

Discussion

1863.	Iron and sulphur when ___ together react to produce iron sulphide.
Answer» Iron and sulphur when ___ together react to produce iron sulphide.

Discussion

1864.	Identify the carbonate anion from the following options:
Answer» Identify the carbonate anion from the following options:

Discussion

1865.	Multiple choice question : (answer with reason) Silver , gold and platinum are called noble metals because A) these are costly B) these are precious C ) these have very less reactivity D) all of these
Answer» Multiple choice question : (answer with reason) Silver , gold and platinum are called noble metals because A) these are costly B) these are precious C ) these have very less reactivity D) all of these

1865.

Multiple choice question : (answer with reason) Silver , gold and platinum are called noble metals because A) these are costly B) these are precious C ) these have very less reactivity D) all of these

Answer»

Multiple choice question : (answer with reason)

Silver , gold and platinum are called noble metals because

A) these are costly

B) these are precious

C ) these have very less reactivity

D) all of these

Discussion

1866.	The lack of which of the following constituents of air forces us to gasp and struggle to breathe?
Answer» The lack of which of the following constituents of air forces us to gasp and struggle to breathe?

Discussion

1867.	Name the mixture in which the composition is uniform and every part of the mixture has the same properties.
Answer» Name the mixture in which the composition is uniform and every part of the mixture has the same properties.

Discussion

1868.	Can a sheep have only underhair on it?
Answer» Can a sheep have only underhair on it?

Discussion

1869.	how do you prepare concentrated acid or base?
Answer» how do you prepare concentrated acid or base?

Discussion

1870.	What is an ionic bond?
Answer» What is an ionic bond?

Discussion

1871.	HCO3- acts as acid or base
Answer» HCO3- acts as acid or base

Discussion

1872.	51. What is ionisation of gases what does it actually mean
Answer» 51. What is ionisation of gases what does it actually mean

Discussion

1873.	Explain combustion reaction with one example.
Answer» Explain combustion reaction with one example.

Discussion

1874.	In the formation of water why does the physical state change??
Answer» In the formation of water why does the physical state change??

Discussion

1875.	Can Aqua Regia dissolve a diamond?
Answer» Can Aqua Regia dissolve a diamond?

Discussion

1876.	Molecule which follows octet rule 1. ClO2 2.NO 3.NO2 4.N2O3
Answer» Molecule which follows octet rule 1. ClO2 2.NO 3.NO2 4.N2O3

Discussion

1877.	nt48gm oxygen at 60degree celcius and 12gm helium at 200degree celcius are mixed in a closed vessel . find the final tempreture.n
Answer» nt48gm oxygen at 60degree celcius and 12gm helium at 200degree celcius are mixed in a closed vessel . find the final tempreture.n

Discussion

1878.	Name A, B, C, D, E and F in the following diagram showing the change of states. [5 MARKS]
Answer» Name A, B, C, D, E and F in the following diagram showing the change of states. [5 MARKS]

Discussion

1879.	Why is melting and boiling pt high in metallic solids?
Answer» Why is melting and boiling pt high in metallic solids?

Discussion

1880.

Four students (A), (B), (C) and (D) independently observed the evaporation of water under different conditions, and recorded the temperature of water at regular intervals as shown below. Student Placing of experimental set up in/under Temperature recording for 15 minutes (A) sun increased gradually (B) open air decreased gradually (C) a fan initially increased, then became constant (D) a corner of the room initially increased, then gradually decreased The correct recording of observations is that of the student :(1) (A)(2) (B)(3) (C)(4) (D)

Answer» Four students (A), (B), (C) and (D) independently observed the evaporation of water under different conditions, and recorded the temperature of water at regular intervals as shown below.

Student	Placing of experimental set up in/under	Temperature recording for 15 minutes
(A)	sun	increased gradually
(B)	open air	decreased gradually
(C)	a fan	initially increased, then became constant
(D)	a corner of the room	initially increased, then gradually decreased

The correct recording of observations is that of the student :

(1) (A)

(2) (B)

(3) (C)

(4) (D)

Discussion

1881.	Describe the process of condensation and Sublimation with examples
Answer» Describe the process of condensation and Sublimation with examples

Discussion

1882.	The measured voltage for the reaction with the indicated concentrations is 1.5 V. Calculate E∘cell in V.Cr(s)+3Ag+(aq,0.1 M)→3Ag(s)+Cr3+(aq,0.1 M)
Answer» The measured voltage for the reaction with the indicated concentrations is $1.5 V$ . Calculate $E_{cell}^{\circ} in V$ . $C r (s) + 3 A g^{+} (a q, 0.1 M) \to 3 A g (s) + C r^{3 +} (a q, 0.1 M)$

Discussion

1883.	If solid sphere having same mass and but different density then MOI OF body about its diameter is
Answer» If solid sphere having same mass and but different density then MOI OF body about its diameter is

Discussion

1884.	Retrouvez:1. cinq fruits2. cinq légumes
Answer» Retrouvez: 1. cinq fruits 2. cinq légumes

Discussion

1885.	Define chemical equation.
Answer» Define chemical equation.

Discussion

1886.	Which of the following is the correct formula of aluminium oxide?
Answer» Which of the following is the correct formula of aluminium oxide?

Discussion

1887.	Uses of rayon
Answer» Uses of rayon

Discussion

1888.	What is capillarity? Give some applications.
Answer» What is capillarity? Give some applications.

Discussion

1889.	Explain in detail what happens when magnesium oxide is dissolved in water. Support your answer with the help of a reaction.[3 MARKS]
Answer» Explain in detail what happens when magnesium oxide is dissolved in water. Support your answer with the help of a reaction.[3 MARKS]

Discussion

1890.	The frequency of Kα X−ray emitted from the element with atomic number 31 is f. If the frequency of Kα X−ray emitted from the element with atomic number 51 is given by 25xf, then the value of x is ________.(Assume that the value of screening constant for Kα is 1)
Answer» The frequency of $K_{α}$ $X -$ ray emitted from the element with atomic number $31$ is $f$ . If the frequency of $K_{α}$ $X -$ ray emitted from the element with atomic number $51$ is given by $\frac{25}{x} f$ , then the value of $x$ is ________. $($ Assume that the value of screening constant for $K_{α}$ is $1)$

Discussion

1891.	38. Why dye is not absorbed cloth washed by soap in hard water?
Answer» 38. Why dye is not absorbed cloth washed by soap in hard water?

Discussion

1892.	Give two reasons to justify that water is a liquid at room temperature. [2 Marks]
Answer» Give two reasons to justify that water is a liquid at room temperature. [2 Marks]

Discussion

1893.	Barium ions , CN negative and Co+2 form an ionic complex .If the complex is supposed to be 75% ionised in water with vant hoff factor equals to 4 the co ordination of Co+2 in the complex can be
Answer» Barium ions , CN negative and Co+2 form an ionic complex .If the complex is supposed to be 75% ionised in water with vant hoff factor equals to 4 the co ordination of Co+2 in the complex can be

Discussion

1894.	Why does nitrogen atom show a maximum covalency of 4?
Answer» Why does nitrogen atom show a maximum covalency of 4?

Discussion

1895.	Write two differences between silk and artificial silk.
Answer» Write two differences between silk and artificial silk.

Discussion

1896.	(a)A jumbled word is given here. Write the correct form of the word. WASHFERRET(b)A jumbled word is given here. Write the correct form of the word. CHARREGE(c)A jumbled word is given here. Write the correct form of the word. QUIFERA(d)A jumbled word is given here. Write the correct form of this word. WOSN
Answer» (a) A jumbled word is given here. Write the correct form of the word. WASHFERRET (b) A jumbled word is given here. Write the correct form of the word. CHARREGE (c) A jumbled word is given here. Write the correct form of the word. QUIFERA (d) A jumbled word is given here. Write the correct form of this word. WOSN

Discussion

1897.	44. What is carbon chloride organic or inorganic
Answer» 44. What is carbon chloride organic or inorganic

Discussion

1898.	What do you mean by Corrosion? Name the factors that hasten corrosion. [3 MARKS]
Answer» What do you mean by Corrosion? Name the factors that hasten corrosion. [3 MARKS]

Discussion

1899.	pH of the following solutions is not affected by dilution A. 0.01M CH3COONa B. 0.01M NaHCO3 C. Buffer of 0.01M CH3COONa and 0.01M CH3COOH D. 0.01M CH3COONH4
Answer» pH of the following solutions is not affected by dilution A. 0.01M CH3COONa B. 0.01M NaHCO3 C. Buffer of 0.01M CH3COONa and 0.01M CH3COOH D. 0.01M CH3COONH4

Discussion

1900.	The mass percentage of O and H present in monosodium phosphate are respectively:
Answer» The mass percentage of $O$ and $H$ present in monosodium phosphate are respectively:

Discussion

Explore topic-wise InterviewSolutions in .

What will be the E0 value for the given half cell reaction? Fe3+(aq)+3e−→Fe(s)Given:E0 value for the half cell reaction, Fe3+(aq)+e−→Fe2+(aq); E0=0.77 VFe2+(aq)+2e−→Fe(s); E0=−0.44 V

Sheela cooked rice in a rice cooker. What kind of change took place? (i) Irreversible change (ii) Endothermic change (iii) Natural change

what is intensity in simple words

(a) Name one indicator which turns red on adding an acid.(b) Name one indicator which turns red on adding a base.

Burst out the bubbles containing oxides that cause acid rain.

The excess energy over the average energy of the reactant molecules to be possessed by the reactants to convert themselves into the products in a reaction is known as

according to octet rule the compound which contain ionic ,covalent and coordinate bond . HOW TO KNOW. IS IT POSSIBLE TO KNOW BY DRAWING ITS ORBITAL DIAGRAM. how to solve such problems 1CaSO4 2.NH4Cl 3.NaNO3 4ALL

Question 3Name the sodium compound which is used for softening hard water.

In plant respiration, Glucose + ___ → Carbon Dioxide + Water

Change of state from ice to water and to steam has been shown below. What type of change is involved in the given picture?

1.Draw born haber cycle for the formation of KCL crystal.

Iron and sulphur when ___ together react to produce iron sulphide.

Identify the carbonate anion from the following options:

Multiple choice question : (answer with reason) Silver , gold and platinum are called noble metals because A) these are costly B) these are precious C ) these have very less reactivity D) all of these

The lack of which of the following constituents of air forces us to gasp and struggle to breathe?

Name the mixture in which the composition is uniform and every part of the mixture has the same properties.

Can a sheep have only underhair on it?

how do you prepare concentrated acid or base?

What is an ionic bond?

HCO3- acts as acid or base

51. What is ionisation of gases what does it actually mean

Explain combustion reaction with one example.

In the formation of water why does the physical state change??

Can Aqua Regia dissolve a diamond?

Molecule which follows octet rule 1. ClO2 2.NO 3.NO2 4.N2O3

nt48gm oxygen at 60degree celcius and 12gm helium at 200degree celcius are mixed in a closed vessel . find the final tempreture.n

Name A, B, C, D, E and F in the following diagram showing the change of states. [5 MARKS]

Why is melting and boiling pt high in metallic solids?

Describe the process of condensation and Sublimation with examples

The measured voltage for the reaction with the indicated concentrations is 1.5 V. Calculate E∘cell in V.Cr(s)+3Ag+(aq,0.1 M)→3Ag(s)+Cr3+(aq,0.1 M)

If solid sphere having same mass and but different density then MOI OF body about its diameter is

Retrouvez:1. cinq fruits2. cinq légumes

Define chemical equation.

Which of the following is the correct formula of aluminium oxide?

Uses of rayon

What is capillarity? Give some applications.

Explain in detail what happens when magnesium oxide is dissolved in water. Support your answer with the help of a reaction.[3 MARKS]

The frequency of Kα X−ray emitted from the element with atomic number 31 is f. If the frequency of Kα X−ray emitted from the element with atomic number 51 is given by 25xf, then the value of x is ________.(Assume that the value of screening constant for Kα is 1)

38. Why dye is not absorbed cloth washed by soap in hard water?

Give two reasons to justify that water is a liquid at room temperature. [2 Marks]

Barium ions , CN negative and Co+2 form an ionic complex .If the complex is supposed to be 75% ionised in water with vant hoff factor equals to 4 the co ordination of Co+2 in the complex can be

Why does nitrogen atom show a maximum covalency of 4?

Write two differences between silk and artificial silk.

44. What is carbon chloride organic or inorganic

What do you mean by Corrosion? Name the factors that hasten corrosion. [3 MARKS]

pH of the following solutions is not affected by dilution A. 0.01M CH3COONa B. 0.01M NaHCO3 C. Buffer of 0.01M CH3COONa and 0.01M CH3COOH D. 0.01M CH3COONH4

The mass percentage of O and H present in monosodium phosphate are respectively: