10223 + Interview Questions in Chemistry

1.	Question 3 Do basic solutions also have H+ (aq) ions? If yes, then why are they basic?
Answer» Question 3 Do basic solutions also have $H^{+}$ (aq) ions? If yes, then why are they basic?

Discussion

2.	Question 57 An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
Answer» Question 57 An element forms an oxide $A_{2} O_{3}$ which is acidic in nature. Identify A as a metal or non-metal.

Discussion

3.	A reaction having equal energies of activation for forward and reverse reactions has
Answer» A reaction having equal energies of activation for forward and reverse reactions has

Discussion

4.	When a colourless compound X reacts with caustic soda, white precipitate of metal hydroxide is formed along with sodium nitrate. The precipitate formed is:
Answer» When a colourless compound X reacts with caustic soda, white precipitate of metal hydroxide is formed along with sodium nitrate. The precipitate formed is:

Discussion

5.	How do the rockets burn or ingnite fuel in it,in space and accelerate?
Answer» How do the rockets burn or ingnite fuel in it,in space and accelerate?

Discussion

6.	Explene how these state of matter arise due to variation in the characteristics of the particle
Answer» Explene how these state of matter arise due to variation in the characteristics of the particle

Discussion

7.	In a solution,there is homogeneity at the particle level..Means??With an example
Answer» In a solution,there is homogeneity at the particle level..Means??With an example

Discussion

8.	What happens when an Aquarius solution of quick lime is applied one wall for white washing purpose and allowed to dry? Write the related equation and also name the products
Answer» What happens when an Aquarius solution of quick lime is applied one wall for white washing purpose and allowed to dry? Write the related equation and also name the products

Discussion

9.	A ball is floating in a liquid in a container with its 25% of volume outside the liquid. If the air of the container is pumped out then what % of volume of ball will be outside the liquid?
Answer» A ball is floating in a liquid in a container with its 25% of volume outside the liquid. If the air of the container is pumped out then what % of volume of ball will be outside the liquid?

Discussion

10.	Is fire matter ?
Answer» Is fire matter ?

Discussion

11.	Is ink a colloid or a solution?
Answer» Is ink a colloid or a solution?

Discussion

12.	importance of sublimation?
Answer» importance of sublimation?

Discussion

13.	What is the correct dm definition of colloidal solution?
Answer» What is the correct dm definition of colloidal solution?

Discussion

14.	Which of the following terms are not related to colloids?
Answer» Which of the following terms are not related to colloids?

Discussion

15.	Among KO2,Na2O and BaO2 unpaired electron(s) is/are present in:
Answer» Among $K O_{2}, N a_{2} O$ and $B a O_{2}$ unpaired electron(s) is/are present in:

Discussion

16.	Combustion is a reaction in which a substance reacts with-
Answer» Combustion is a reaction in which a substance reacts with-

Discussion

17.	valency of polyatomic ions
Answer» valency of polyatomic ions

Discussion

18.	Germination of seed can be classified as__ change.
Answer» Germination of seed can be classified as__ change.

Discussion

19.	How can we separate the mixture of salt,sand and sulphur .
Answer» How can we separate the mixture of salt,sand and sulphur .

Discussion

20.	How can we separate sugar and water?
Answer» How can we separate sugar and water?

Discussion

21.	Burning of candle accompanies both physical and chemical changes identify the strangers give another example for familiar process in which both the chemical and physical changes take place
Answer» Burning of candle accompanies both physical and chemical changes identify the strangers give another example for familiar process in which both the chemical and physical changes take place

Discussion

22.	A material containing two or more substances is known as a mixture. Mixtures can be classified as homogeneous and heterogeneous depending upon the composition of substances present. -A mixture is said to be homogeneous if its
Answer» A material containing two or more substances is known as a mixture. Mixtures can be classified as homogeneous and heterogeneous depending upon the composition of substances present. -A mixture is said to be homogeneous if its

22.

A material containing two or more substances is known as a mixture. Mixtures can be classified as homogeneous and heterogeneous depending upon the composition of substances present. -A mixture is said to be homogeneous if its

Answer»

A material containing two or more substances is known as a mixture. Mixtures can be classified as homogeneous and heterogeneous depending upon the composition of substances present.

-A mixture is said to be homogeneous if its

Discussion

23.	Which solvent can be used to separate the mixture of salt and chalk powder?
Answer» Which solvent can be used to separate the mixture of salt and chalk powder?

Discussion

24.	The maximum number of electrons that can be accommodated in an orbit is given by the formula _______ where n is the number of orbit.
Answer» The maximum number of electrons that can be accommodated in an orbit is given by the formula _______ where n is the number of orbit.

Discussion

25.	The formula weight of ________________ is 180u.
Answer» The formula weight of ________________ is 180u.

Discussion

26.	In laboratory preparation of hydrogen, impurities of arsine and phosphine can be removed by passing it through which of the following solution?
Answer» In laboratory preparation of hydrogen, impurities of arsine and phosphine can be removed by passing it through which of the following solution?

Discussion

27.	A wet handkerchief is placed on the forehead of a person suffering from high fever. Why? Why is alcohol preferred over water? [3 MARKS]
Answer» A wet handkerchief is placed on the forehead of a person suffering from high fever. Why? Why is alcohol preferred over water? [3 MARKS]

Discussion

28.	How many H2O should be added to the RHS of the following equation to balance number of oxygen atoms on the left ? 6Fe2++Cr2O2−7+14H+⟶6Fe3++2Cr3++ ___________
Answer» How many $H_{2} O$ should be added to the RHS of the following equation to balance number of oxygen atoms on the left ? $6 F e^{2 +} + C r_{2} O_{7}^{2 -} + 14 H^{+} ⟶ 6 F e^{3 +} + 2 C r^{3 +} +$ ___________

Discussion

29.	When atoms are bombarded with alpha particles, only a few in million suffer deflection, others pass out undeflected. This is because
Answer» When atoms are bombarded with alpha particles, only a few in million suffer deflection, others pass out undeflected. This is because

29.

When atoms are bombarded with alpha particles, only a few in million suffer deflection, others pass out undeflected. This is because

Answer»

When atoms are bombarded with alpha particles, only a few in million suffer deflection, others pass out undeflected. This is because

Discussion

30.	Why was mole concept introduced in writing a chemical reaction equation? Does the number of grams differ from one mole to another mole? [3 MARKS]
Answer» Why was mole concept introduced in writing a chemical reaction equation? Does the number of grams differ from one mole to another mole? [3 MARKS]

Discussion

31.	Identify X in the following reaction X+ Acid - Salt + Water.
Answer» Identify X in the following reaction X+ Acid - Salt + Water.

Discussion

32.	Difference Between electrovalent and covalent bonds
Answer» Difference Between electrovalent and covalent bonds

Discussion

33.	Which of the following chemicals cause ozone layer depletion?
Answer» Which of the following chemicals cause ozone layer depletion?

Discussion

34.	When two ice cubes are pressed tightly we find that two ice cubes join together. Why? (5 marks) .
Answer» When two ice cubes are pressed tightly we find that two ice cubes join together. Why? (5 marks) .

Discussion

35.	A sample containing 85g of NH3 is decomposed into Nitrogen and Hydrogen. The total amount of Nitrogen and Hydrogen present in 85g of the sample respectively are:
Answer» A sample containing 85g of NH₃ is decomposed into Nitrogen and Hydrogen. The total amount of Nitrogen and Hydrogen present in 85g of the sample respectively are:

Discussion

36.	What is colloidal solution
Answer» What is colloidal solution

Discussion

37.	Give reason :the latent heat of vaporisation of steam is more than that of boiling point .explain
Answer» Give reason :the latent heat of vaporisation of steam is more than that of boiling point .explain

Discussion

38.	Why is Carbon 12 isotope used as a standard reference for measuring atomic mass?
Answer» Why is Carbon 12 isotope used as a standard reference for measuring atomic mass?

Discussion

39.	Read the following statements and choose the correct statements. A) Hydrogen has high I.P like halogens. B) Hydrogen atom tends to form gaseous H+ ion like alkali metals easily. C) Like halogens, Hydrogen gains an electron to acquire the nearest inert gas configuration. D) In electrolysis, H2 is always liberated at cathode.
Answer» Read the following statements and choose the correct statements. A) Hydrogen has high I.P like halogens. B) Hydrogen atom tends to form gaseous $H^{+}$ ion like alkali metals easily. C) Like halogens, Hydrogen gains an electron to acquire the nearest inert gas configuration. D) In electrolysis, $H_{2}$ is always liberated at cathode.

39.

Read the following statements and choose the correct statements. A) Hydrogen has high I.P like halogens. B) Hydrogen atom tends to form gaseous H+ ion like alkali metals easily. C) Like halogens, Hydrogen gains an electron to acquire the nearest inert gas configuration. D) In electrolysis, H2 is always liberated at cathode.

Answer»

Read the following statements and choose the correct statements.

A) Hydrogen has high I.P like halogens.

B) Hydrogen atom tends to form gaseous $H^{+}$ ion like alkali metals easily.

C) Like halogens, Hydrogen gains an electron to acquire the nearest inert gas configuration.

D) In electrolysis, $H_{2}$ is always liberated at cathode.

Discussion

40.	What is the significance of the number of protons found in the atoms of different elements ?
Answer» What is the significance of the number of protons found in the atoms of different elements ?

Discussion

41.	Helium is an unreactive gas and neon is a gas of extremely low reactivity. Give reasons.
Answer» Helium is an unreactive gas and neon is a gas of extremely low reactivity. Give reasons.

Discussion

42.	Can potassium permanganate sublime?
Answer» Can potassium permanganate sublime?

Discussion

43.	Question 15 Pentane has the molecular formula C5H12. It has (a) 5 covalent bonds (b) 12 covalent bonds (c) 16 covalent bonds (d) 17 covalent bonds
Answer» Question 15 Pentane has the molecular formula $C_{5} H_{12}$ . It has (a) 5 covalent bonds (b) 12 covalent bonds (c) 16 covalent bonds (d) 17 covalent bonds

Discussion

44.	Convert into mole 12 gram of Oxygen gas
Answer» Convert into mole 12 gram of Oxygen gas

Discussion

45.	Respected BYJUS faculty, My name is VANDITA YADAV and I am student of BYJUS 9th grade I. C. S. E How does ice at 0° C has greater cooling effect than water at 0°C? Thank you.
Answer» Respected BYJUS faculty, My name is VANDITA YADAV and I am student of BYJUS 9th grade I. C. S. E How does ice at 0°C has greater cooling effect than water at 0°C? Thank you.

45.

Respected BYJUS faculty, My name is VANDITA YADAV and I am student of BYJUS 9th grade I. C. S. E How does ice at 0° C has greater cooling effect than water at 0°C? Thank you.

Answer»

Respected BYJUS faculty,

My name is VANDITA YADAV and I am student of BYJUS 9th grade I. C. S. E

How does ice at 0°C has greater cooling effect than water at 0°C?

Thank you.

Discussion

46.	Name a chemical fertilizer which can supply potassium as well as nitrogen.
Answer» Name a chemical fertilizer which can supply potassium as well as nitrogen.

Discussion

47.	Write the IUPAC name of the compound CH2=CH-CN:
Answer» Write the IUPAC name of the compound CH₂=CH-CN:

Discussion

48.	Explain (a) diffusion in solids (b) diffusion in liquid (c) diffusion in gas
Answer» Explain (a) diffusion in solids (b) diffusion in liquid (c) diffusion in gas

48.

Explain (a) diffusion in solids (b) diffusion in liquid (c) diffusion in gas

Answer»

Explain

(a) diffusion in solids

(b) diffusion in liquid

(c) diffusion in gas

Discussion

49.	Please explain clearly, what is redox reaction?
Answer» Please explain clearly, what is redox reaction?

Discussion

50.	What are the causes of acid rain ?
Answer» What are the causes of acid rain ?

50.

What are the causes of acid rain ?

Answer»

What are the causes of acid rain ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question 3 Do basic solutions also have H+ (aq) ions? If yes, then why are they basic?

Question 57 An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.

A reaction having equal energies of activation for forward and reverse reactions has

When a colourless compound X reacts with caustic soda, white precipitate of metal hydroxide is formed along with sodium nitrate. The precipitate formed is:

How do the rockets burn or ingnite fuel in it,in space and accelerate?

Explene how these state of matter arise due to variation in the characteristics of the particle

In a solution,there is homogeneity at the particle level..Means??With an example

What happens when an Aquarius solution of quick lime is applied one wall for white washing purpose and allowed to dry? Write the related equation and also name the products

A ball is floating in a liquid in a container with its 25% of volume outside the liquid. If the air of the container is pumped out then what % of volume of ball will be outside the liquid?

Is fire matter ?

Is ink a colloid or a solution?

importance of sublimation?

What is the correct dm definition of colloidal solution?

Which of the following terms are not related to colloids?

Among KO2,Na2O and BaO2 unpaired electron(s) is/are present in:

Combustion is a reaction in which a substance reacts with-

valency of polyatomic ions

Germination of seed can be classified as__ change.

How can we separate the mixture of salt,sand and sulphur .

How can we separate sugar and water?

Burning of candle accompanies both physical and chemical changes identify the strangers give another example for familiar process in which both the chemical and physical changes take place

A material containing two or more substances is known as a mixture. Mixtures can be classified as homogeneous and heterogeneous depending upon the composition of substances present. -A mixture is said to be homogeneous if its

Which solvent can be used to separate the mixture of salt and chalk powder?

The maximum number of electrons that can be accommodated in an orbit is given by the formula _______ where n is the number of orbit.

The formula weight of ________________ is 180u.

In laboratory preparation of hydrogen, impurities of arsine and phosphine can be removed by passing it through which of the following solution?

A wet handkerchief is placed on the forehead of a person suffering from high fever. Why? Why is alcohol preferred over water? [3 MARKS]

How many H2O should be added to the RHS of the following equation to balance number of oxygen atoms on the left ? 6Fe2++Cr2O2−7+14H+⟶6Fe3++2Cr3++ ___________

When atoms are bombarded with alpha particles, only a few in million suffer deflection, others pass out undeflected. This is because

Why was mole concept introduced in writing a chemical reaction equation? Does the number of grams differ from one mole to another mole? [3 MARKS]

Identify X in the following reaction X+ Acid - Salt + Water.

Difference Between electrovalent and covalent bonds

Which of the following chemicals cause ozone layer depletion?

When two ice cubes are pressed tightly we find that two ice cubes join together. Why? (5 marks) .

A sample containing 85g of NH3 is decomposed into Nitrogen and Hydrogen. The total amount of Nitrogen and Hydrogen present in 85g of the sample respectively are:

What is colloidal solution

Give reason :the latent heat of vaporisation of steam is more than that of boiling point .explain

Why is Carbon 12 isotope used as a standard reference for measuring atomic mass?

What is the significance of the number of protons found in the atoms of different elements ?

Helium is an unreactive gas and neon is a gas of extremely low reactivity. Give reasons.

Can potassium permanganate sublime?

Question 15 Pentane has the molecular formula C5H12. It has (a) 5 covalent bonds (b) 12 covalent bonds (c) 16 covalent bonds (d) 17 covalent bonds

Convert into mole 12 gram of Oxygen gas

Respected BYJUS faculty, My name is VANDITA YADAV and I am student of BYJUS 9th grade I. C. S. E How does ice at 0° C has greater cooling effect than water at 0°C? Thank you.

Name a chemical fertilizer which can supply potassium as well as nitrogen.

Write the IUPAC name of the compound CH2=CH-CN:

Explain (a) diffusion in solids (b) diffusion in liquid (c) diffusion in gas

Please explain clearly, what is redox reaction?

What are the causes of acid rain ?