10223 + Interview Questions in Chemistry

1.	The conversion of molecules A to B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of
Answer» The conversion of molecules A to B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of

Discussion

2.	In the process of evaporation, which one of the following pieces of laboratory apparatus would not be used?
Answer» In the process of evaporation, which one of the following pieces of laboratory apparatus would not be used?

2.

In the process of evaporation, which one of the following pieces of laboratory apparatus would not be used?

Answer»

In the process of evaporation, which one of the following pieces of laboratory apparatus would not be used?

Discussion

3.	what is atomic mass and how do you find the atomic mass of a substance kindly provide answer for this question thank you samyukta 9677143405
Answer» what is atomic mass and how do you find the atomic mass of a substance kindly provide answer for this question thank you samyukta 9677143405

Discussion

4.	Why air is not a hetrogenous mixture?
Answer» Why air is not a hetrogenous mixture?

Discussion

5.	Find the number of moles in 4×10^31atoms of iron
Answer» Find the number of moles in 4×10^31atoms of iron

Discussion

6.	CaCO3 + H2O
Answer» CaCO3 + H2O

Discussion

7.	How is the rate of chemical reaction affected when the surface area of the reactant is increased? Give an example in support of your answer.
Answer» How is the rate of chemical reaction affected when the surface area of the reactant is increased? Give an example in support of your answer.

Discussion

8.	Complete the following 2Al2O3+3C→4A+3B. A & B are as follows.
Answer» Complete the following $2 A l_{2} O_{3} + 3 C \to 4 A + 3 B$ . A & B are as follows.

8.

Complete the following 2Al2O3+3C→4A+3B. A & B are as follows.

Answer»

Complete the following

$2 A l_{2} O_{3} + 3 C \to 4 A + 3 B$ . A & B are as follows.

Discussion

9.	Which of the following hydroxides of alkaline earth metals is least basic
Answer» Which of the following hydroxides of alkaline earth metals is least basic

9.

Which of the following hydroxides of alkaline earth metals is least basic

Answer»

Which of the following hydroxides of alkaline earth metals is least basic

Discussion

10.	What is the possibility of the value of the difference in electronegativity in carbon dioxide?
Answer» What is the possibility of the value of the difference in electronegativity in carbon dioxide?

Discussion

11.	Which of the following options is/are wrong about the reaction given below? Zn+2HCl→ZnCl2+H2
Answer» Which of the following options is/are wrong about the reaction given below? $Z n + 2 H C l \to Z n C l_{2} + H_{2}$

11.

Which of the following options is/are wrong about the reaction given below? Zn+2HCl→ZnCl2+H2

Answer»

Which of the following options is/are wrong about the reaction given below?

$Z n + 2 H C l \to Z n C l_{2} + H_{2}$

Discussion

12.	You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ? (a) evaporation (b) simple distillation (c) fractional distillation (d) crystallisation
Answer» You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ? (a) evaporation (b) simple distillation (c) fractional distillation (d) crystallisation

12.

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ? (a) evaporation (b) simple distillation (c) fractional distillation (d) crystallisation

Answer»

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?

(a) evaporation (b) simple distillation (c) fractional distillation (d) crystallisation

Discussion

13.	The latent heat of fusion of ice is: (a) 33.4 ×105J/Kg (b) 22.5 ×105J/Kg (c) 33.4 ×104J/Kg (d) 2.25 ×104J/Kg
Answer» The latent heat of fusion of ice is: (a) 33.4 $\times 10^{5} J / K g$ (b) 22.5 $\times 10^{5} J / K g$ (c) 33.4 $\times 10^{4} J / K g$ (d) 2.25 $\times 10^{4} J / K g$

13.

The latent heat of fusion of ice is: (a) 33.4 ×105J/Kg (b) 22.5 ×105J/Kg (c) 33.4 ×104J/Kg (d) 2.25 ×104J/Kg

Answer»

The latent heat of fusion of ice is:

(a) 33.4 $\times 10^{5} J / K g$ (b) 22.5 $\times 10^{5} J / K g$
(c) 33.4 $\times 10^{4} J / K g$ (d) 2.25 $\times 10^{4} J / K g$

Discussion

14.	Chemical substances having a net charge is called ___________.
Answer» Chemical substances having a net charge is called ___________.

Discussion

15.	Define the following terms: (a) Melting (b) Boiling
Answer» Define the following terms: (a) Melting (b) Boiling

15.

Define the following terms: (a) Melting (b) Boiling

Answer»

Define the following terms:

(a) Melting (b) Boiling

Discussion

16.	Which of the following element(s) is/are alkali metals.
Answer» Which of the following element(s) is/are alkali metals.

Discussion

17.	Choose the correct option for the underlined phrase. The coffee tastes very bad.
Answer» Choose the correct option for the underlined phrase. The coffee tastes very bad.

17.

Choose the correct option for the underlined phrase. The coffee tastes very bad.

Answer»

Choose the correct option for the underlined phrase.

The coffee tastes very bad.

Discussion

18.	Which one of the following statements is true according to Rutherford's nuclear model of an atom?
Answer» Which one of the following statements is true according to Rutherford's nuclear model of an atom?

Discussion

19.	Which of the following is/are uses of CO2?
Answer» Which of the following is/are uses of $C O_{2}$ ?

Discussion

20.	Which one of the following has the highest oxidation number of iodine
Answer» Which one of the following has the highest oxidation number of iodine

Discussion

21.	Name the elements that are in liquid state at room temperature.
Answer» Name the elements that are in liquid state at room temperature.

Discussion

22.	Which of the following pairs are isobars ? (i) 5826A, 5828B (ii) 7935X, 8035Y Give reasons for your choice.
Answer» Which of the following pairs are isobars ? $(i)_{26}^{58} A,_{28}^{58} B (i i)_{35}^{79} X,_{35}^{80} Y$ Give reasons for your choice.

22.

Which of the following pairs are isobars ? (i) 5826A, 5828B (ii) 7935X, 8035Y Give reasons for your choice.

Answer»

Which of the following pairs are isobars ?

$(i)_{26}^{58} A,_{28}^{58} B (i i)_{35}^{79} X,_{35}^{80} Y$

Give reasons for your choice.

Discussion

23.	Lewis-Kossel structure of N2 is
Answer» Lewis-Kossel structure of $N_{2}$ is

Discussion

24.	Why is compound a pure substance ?
Answer» Why is compound a pure substance ?

Discussion

25.	In the diagram below it depicts the structure of atom, where we are able to see orbits and electrons. How many neutrons and electrons are present in the nucleus?
Answer» In the diagram below it depicts the structure of atom, where we are able to see orbits and electrons. How many neutrons and electrons are present in the nucleus?

25.

In the diagram below it depicts the structure of atom, where we are able to see orbits and electrons. How many neutrons and electrons are present in the nucleus?

Answer»

In the diagram below it depicts the structure of atom, where we are able to see orbits and electrons. How many neutrons and electrons are present in the nucleus?

Discussion

26.	Find the valency of Pb in PbO
Answer» Find the valency of Pb in PbO

Discussion

27.	How many moles of O2 are there in 1.20 × 1022 oxygen molecules?
Answer» How many moles of O₂ are there in 1.20 × 10²²oxygen molecules?

Discussion

28.	difference between crystalisation and evaporation? can we get pure salt only by evaporation?
Answer» difference between crystalisation and evaporation? can we get pure salt only by evaporation?

Discussion

29.	What are the main difference s between sublimes and sublimates.
Answer» What are the main difference s between sublimes and sublimates.

Discussion

30.	Her skirt was blue ____________ white dots.
Answer» Her skirt was blue ____________ white dots.

Discussion

31.	Given elements X, Y and Z with atomic masses a,b and c are said to form Dobereiner's triad. Which of the following statement is true if its known that a > b > c?
Answer» Given elements X, Y and Z with atomic masses a,b and c are said to form Dobereiner's triad. Which of the following statement is true if its known that a > b > c?

Discussion

32.	Which of the following options is not an isotope of carbon?
Answer» Which of the following options is not an isotope of carbon?

Discussion

33.	Milk of Magnesia is: (a) a colloid (b) a true solution (c) a homogeneous maixture (d) a suspension
Answer» Milk of Magnesia is: (a) a colloid (b) a true solution (c) a homogeneous maixture (d) a suspension

33.

Milk of Magnesia is: (a) a colloid (b) a true solution (c) a homogeneous maixture (d) a suspension

Answer»

Milk of Magnesia is:

(a) a colloid (b) a true solution

(c) a homogeneous maixture (d) a suspension

Discussion

34.	Differentiate between compounds and mixtures.(5 points )
Answer» Differentiate between compounds and mixtures.(5 points )

Discussion

35.	What difference in the property of two miscible liquids enables their separation by fractional distillation ?
Answer» What difference in the property of two miscible liquids enables their separation by fractional distillation ?

Discussion

36.	Question 38 Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?
Answer» Question 38 Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?

Discussion

37.	The number of protons in one atom of an element X is 8. What will be the number of electrons in its ion X2− (a) 8 (b) 9 (c) 10 (d) 11
Answer» The number of protons in one atom of an element X is 8. What will be the number of electrons in its ion $X^{2 -}$ (a) 8 (b) 9 (c) 10 (d) 11

Discussion

38.	Ice at 0 degrees Celcius is more effective in cooling as compared to water at 0 degrees Celcius. Why?
Answer» Ice at 0 degrees Celcius is more effective in cooling as compared to water at 0 degrees Celcius. Why?

Discussion

39.	Which of the following has the largest number of atoms?
Answer» Which of the following has the largest number of atoms?

Discussion

40.	Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:
Answer» Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:

Discussion

41.	3 and 6 electrons are present in outer-most orbit of A and B respectively. The chemical formula of its compound will be
Answer» 3 and 6 electrons are present in outer-most orbit of A and B respectively. The chemical formula of its compound will be

Discussion

42.	The ionic compound formed by the ions Fe3+ and (SO4)2− has the chemical formula ________.
Answer» The ionic compound formed by the ions ${Fe}^{3 +}$ and $({SO}_{4})^{2 -}$ has the chemical formula ________.

Discussion

43.	Question 6 Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period? (a) A, B, C (b) B, C, D (c) A, D, E d) B, D, E
Answer» Question 6 Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period? (a) A, B, C (b) B, C, D (c) A, D, E d) B, D, E

Discussion

44.	The chemical formula of the ionic compound containing copper(II) & sulphate ions is .
Answer» The chemical formula of the ionic compound containing copper(II) & sulphate ions is .

Discussion

45.	How can a true solution be separated by physical means
Answer» How can a true solution be separated by physical means

Discussion

46.	In LiF, the structure of F− is
Answer» In LiF, the structure of $F^{-}$ is

Discussion

47.	The reaction of sodium highly exothermic sodium with H2O. The rate of reaction is lowered by
Answer» The reaction of sodium highly exothermic sodium with H₂O. The rate of reaction is lowered by

Discussion

48.	As part of matter in our surroundings, I have a doubt. I have a stone in my house which glows a green colour in the dark after being exposed to sunlight for some time. Can u please tell me what mineral it can be and why does it glow like that?
Answer» As part of matter in our surroundings, I have a doubt. I have a stone in my house which glows a green colour in the dark after being exposed to sunlight for some time. Can u please tell me what mineral it can be and why does it glow like that?

Discussion

49.	Why is water at 273K more effective in cooling than water at the same temperature?
Answer» Why is water at 273K more effective in cooling than water at the same temperature?

Discussion

50.	Which of the following statements about a mixture is incorrect?
Answer» Which of the following statements about a mixture is incorrect?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The conversion of molecules A to B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of

In the process of evaporation, which one of the following pieces of laboratory apparatus would not be used?

what is atomic mass and how do you find the atomic mass of a substance kindly provide answer for this question thank you samyukta 9677143405

Why air is not a hetrogenous mixture?

Find the number of moles in 4×10^31atoms of iron

CaCO3 + H2O

How is the rate of chemical reaction affected when the surface area of the reactant is increased? Give an example in support of your answer.

Complete the following 2Al2O3+3C→4A+3B. A &amp; B are as follows.

Which of the following hydroxides of alkaline earth metals is least basic

What is the possibility of the value of the difference in electronegativity in carbon dioxide?

Which of the following options is/are wrong about the reaction given below? Zn+2HCl→ZnCl2+H2

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ? (a) evaporation (b) simple distillation (c) fractional distillation (d) crystallisation

The latent heat of fusion of ice is: (a) 33.4 ×105J/Kg (b) 22.5 ×105J/Kg (c) 33.4 ×104J/Kg (d) 2.25 ×104J/Kg

Chemical substances having a net charge is called ___________.

Define the following terms: (a) Melting (b) Boiling

Which of the following element(s) is/are alkali metals.

Choose the correct option for the underlined phrase. The coffee tastes very bad.

Which one of the following statements is true according to Rutherford's nuclear model of an atom?

Which of the following is/are uses of CO2?

Which one of the following has the highest oxidation number of iodine

Name the elements that are in liquid state at room temperature.

Which of the following pairs are isobars ? (i) 5826A, 5828B (ii) 7935X, 8035Y Give reasons for your choice.

Lewis-Kossel structure of N2 is

Why is compound a pure substance ?

In the diagram below it depicts the structure of atom, where we are able to see orbits and electrons. How many neutrons and electrons are present in the nucleus?

Find the valency of Pb in PbO

How many moles of O2 are there in 1.20 × 1022 oxygen molecules?

difference between crystalisation and evaporation? can we get pure salt only by evaporation?

What are the main difference s between sublimes and sublimates.

Her skirt was blue ____________ white dots.

Given elements X, Y and Z with atomic masses a,b and c are said to form Dobereiner's triad. Which of the following statement is true if its known that a &gt; b &gt; c?

Which of the following options is not an isotope of carbon?

Milk of Magnesia is: (a) a colloid (b) a true solution (c) a homogeneous maixture (d) a suspension

Differentiate between compounds and mixtures.(5 points )

What difference in the property of two miscible liquids enables their separation by fractional distillation ?

Question 38 Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?

The number of protons in one atom of an element X is 8. What will be the number of electrons in its ion X2− (a) 8 (b) 9 (c) 10 (d) 11

Ice at 0 degrees Celcius is more effective in cooling as compared to water at 0 degrees Celcius. Why?

Which of the following has the largest number of atoms?

Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:

3 and 6 electrons are present in outer-most orbit of A and B respectively. The chemical formula of its compound will be

The ionic compound formed by the ions Fe3+ and (SO4)2− has the chemical formula ________.

Question 6 Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period? (a) A, B, C (b) B, C, D (c) A, D, E d) B, D, E

The chemical formula of the ionic compound containing copper(II) &amp; sulphate ions is .

How can a true solution be separated by physical means

In LiF, the structure of F− is

The reaction of sodium highly exothermic sodium with H2O. The rate of reaction is lowered by

As part of matter in our surroundings, I have a doubt. I have a stone in my house which glows a green colour in the dark after being exposed to sunlight for some time. Can u please tell me what mineral it can be and why does it glow like that?

Why is water at 273K more effective in cooling than water at the same temperature?

Which of the following statements about a mixture is incorrect?

Complete the following 2Al2O3+3C→4A+3B. A & B are as follows.

Given elements X, Y and Z with atomic masses a,b and c are said to form Dobereiner's triad. Which of the following statement is true if its known that a > b > c?

The chemical formula of the ionic compound containing copper(II) & sulphate ions is .