7248 + Interview Questions in Chemistry Page 53 InterviewSolution

2601.	Is any certain rule followed while writing the formulae of compounds, like ammonia is written as NH3 but not H3N?The ionic compounds' formulae are written as Cation + Anion.But what about the covalent compounds?
Answer» Is any certain rule followed while writing the formulae of compounds, like ammonia is written as NH3 but not H3N? The ionic compounds' formulae are written as Cation + Anion. But what about the covalent compounds?

Discussion

2602.	ntderive d relation bw molar conductivity nd conductivityyn
Answer» ntderive d relation bw molar conductivity nd conductivityyn

Discussion

2603.	Drying of wet clothes in an open terrace takes place due to the phenomenon of___ .
Answer» Drying of wet clothes in an open terrace takes place due to the phenomenon of___ .

Discussion

2604.	Question 11Petroleum was formed from organisms:(a) living on the land(b) living on the plants(c) living in the sea(d) living on the rocks
Answer» Question 11 Petroleum was formed from organisms: (a) living on the land (b) living on the plants (c) living in the sea (d) living on the rocks

Discussion

2605.	What is polar solution and non-polar solution?
Answer» What is polar solution and non-polar solution?

Discussion

2606.	Write down the various exceptions in physical properties of non metals.
Answer» Write down the various exceptions in physical properties of non metals.

Discussion

2607.	a. What happens when copper carbonate is heated strongly?b. What happens when Cl2 gas is passed through the KI solution?
Answer» a. What happens when copper carbonate is heated strongly? b. What happens when $C l_{2}$ gas is passed through the $K I$ solution?

Discussion

2608.	In which of the following forms is oil trapped inside the Earth?
Answer» In which of the following forms is oil trapped inside the Earth?

Discussion

2609.	Coal tar is a
Answer» Coal tar is a

Discussion

2610.	Drinking water cab be made absolutely safe by adding some: (a) aspirin tablets (b) iodine tablets (c) chlorine tablets (d) chlorophyll tablets
Answer» Drinking water cab be made absolutely safe by adding some: (a) aspirin tablets (b) iodine tablets (c) chlorine tablets (d) chlorophyll tablets

2610.

Drinking water cab be made absolutely safe by adding some: (a) aspirin tablets (b) iodine tablets (c) chlorine tablets (d) chlorophyll tablets

Answer»

Drinking water cab be made absolutely safe by adding some:

(a) aspirin tablets

(b) iodine tablets

(c) chlorine tablets

(d) chlorophyll tablets

Discussion

2611.	Which zone of a flame does a goldsmith use for melting gold and silver and why?
Answer» Which zone of a flame does a goldsmith use for melting gold and silver and why?

Discussion

2612.	__________ and __________ are strong electrolytes.
Answer» __________ and __________ are strong electrolytes.

Discussion

2613.	The following table gives the difference between elements and compounds. Which of the given difference is incorrect? ElementsCompounds(1) Pure substance(1) Impure substance(2) Has only one kind of atoms(2) Has two or more kinds ofatoms(3) Represented by symbol(3) Represented by chemicalformula(4) Smallest particle is atom(4) Smallest particle is molecule
Answer» The following table gives the difference between elements and compounds. Which of the given difference is incorrect? $\begin{matrix} Elements & Compounds (1) Pure substance & (1) Impure substance (2) Has only one kind of atoms & (2) Has two or more kinds of atoms (3) Represented by symbol & (3) Represented by chemical formula (4) Smallest particle is atom & (4) Smallest particle is molecule \end{matrix}$

2613.

The following table gives the difference between elements and compounds. Which of the given difference is incorrect? ElementsCompounds(1) Pure substance(1) Impure substance(2) Has only one kind of atoms(2) Has two or more kinds ofatoms(3) Represented by symbol(3) Represented by chemicalformula(4) Smallest particle is atom(4) Smallest particle is molecule

Answer»

The following table gives the difference between elements and compounds. Which of the given difference is incorrect?

$\begin{matrix} Elements & Compounds (1) Pure substance & (1) Impure substance (2) Has only one kind of atoms & (2) Has two or more kinds of atoms (3) Represented by symbol & (3) Represented by chemical formula (4) Smallest particle is atom & (4) Smallest particle is molecule \end{matrix}$

Discussion

2614.	On the electrolysis of aqueous solution of sodium sulphate, on cathode we get
Answer» On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

Discussion

2615.	How does atom gain stability when it revolves in different sheels
Answer» How does atom gain stability when it revolves in different sheels

Discussion

2616.	Question 3.1 Write a balanced chemical equation with state symbols for the reaction:The solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
Answer» Question 3.1 Write a balanced chemical equation with state symbols for the reaction: The solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Discussion

2617.	Explain the principle which governs the separation of coloured components present in black ink, using chromatography.
Answer» Explain the principle which governs the separation of coloured components present in black ink, using chromatography.

Discussion

2618.	Which one of the following sentence is incorrect about extraction of metals? The extraction of metals from its ore depends on:
Answer» Which one of the following sentence is incorrect about extraction of metals? The extraction of metals from its ore depends on:

Discussion

2619.	How can we represent a compound?
Answer» How can we represent a compound?

Discussion

2620.	Give two uses of: (a) Carbon (b) Carbon dioxide (c) Methane
Answer» Give two uses of: (a) Carbon (b) Carbon dioxide (c) Methane

2620.

Give two uses of: (a) Carbon (b) Carbon dioxide (c) Methane

Answer»

Give two uses of:

(a) Carbon (b) Carbon dioxide (c) Methane

Discussion

2621.	A gas completely occupies the vessel in which it is kept. Justify.
Answer» A gas completely occupies the vessel in which it is kept. Justify.

Discussion

2622.	10g of ice at 0c is mixed with 100g of water at 50c. What is the resul†an t temperature of mixture?
Answer» 10g of ice at 0c is mixed with 100g of water at 50c. What is the resul†an t temperature of mixture?

Discussion

2623.	Coal is majorly composed of
Answer» Coal is majorly composed of

Discussion

2624.	Basic form of matter that cannot be broken down into simpler substances by chemical reactions is called:
Answer» Basic form of matter that cannot be broken down into simpler substances by chemical reactions is called:

Discussion

2625.	An element X forms an ion having a charge of +4 while another element Y forms an ion having a charge of −2. What will be the chemical formula of the compound formed by the combination of X and Y?
Answer» An element X forms an ion having a charge of $+ 4$ while another element Y forms an ion having a charge of $- 2$ . What will be the chemical formula of the compound formed by the combination of X and Y?

Discussion

2626.	What weight of BaCl2 (in grams) would react with 24.4 g of sodium sulphate to produce 46.6 g of barium sulphate and 23.4 g of sodium chloride?(Given, BaCl2+Na2SO4→BaSO4+2NaCl
Answer» What weight of $B a C l_{2}$ (in grams) would react with $24.4 g$ of sodium sulphate to produce $46.6 g$ of barium sulphate and $23.4 g$ of sodium chloride? (Given, $B a C l_{2} + N a_{2} S O_{4} \to B a S O_{4} + 2 N a C l$

Discussion

2627.	60 What is maximum number of electron which can be accommodated in an atom in which the highest principal quantum number value is 4:
Answer» 60 What is maximum number of electron which can be accommodated in an atom in which the highest principal quantum number value is 4:

Discussion

2628.	52. The radius of an atom of He is 0.05 nm. Assuming that one mole of a gas occupies 22.4 litres at STP, the fraction of the volume occupied by the atoms in a mole of He gas at STP is: A. 1.4 × 10−4. B. 1.4 × 10−5. C. 7.1 × 10−4. D. 7.1 × 10−5.
Answer» 52. The radius of an atom of He is 0.05 nm. Assuming that one mole of a gas occupies 22.4 litres at STP, the fraction of the volume occupied by the atoms in a mole of He gas at STP is: A. 1.4 × 10−4. B. 1.4 × 10−5. C. 7.1 × 10−4. D. 7.1 × 10−5.

Discussion

2629.	why does helium have very low solubility even in very high pressure?
Answer» why does helium have very low solubility even in very high pressure?

Discussion

2630.	Which of the following statements is not true for a base?
Answer» Which of the following statements is not true for a base?

Discussion

2631.	multiply z1=1+i and z2=root 3 +i using euler form
Answer» multiply z1=1+i and z2=root 3 +i using euler form

Discussion

2632.	Sodium and potassium are stored in kerosene
Answer» Sodium and potassium are stored in kerosene

Discussion

2633.	Reductive ozonolysis of natural rubber will give
Answer» Reductive ozonolysis of natural rubber will give

Discussion

2634.	Question: Some of the following statements are incorrect. Find the incorrect statements and correct them.(a) The property of metals by virtue of which they can be drawn into wires is called ductility.(b) Metals are good conductors of electricity but poor conductors of heat.(c) Articles made of metals produce a ringing sound when struck hard.(d) Oxides of non-metals and metals are acidic in nature.(e) A less reactive metal replaces a more reactive metal from its salt solution in water.
Answer» Question: Some of the following statements are incorrect. Find the incorrect statements and correct them. (a) The property of metals by virtue of which they can be drawn into wires is called ductility. (b) Metals are good conductors of electricity but poor conductors of heat. (c) Articles made of metals produce a ringing sound when struck hard. (d) Oxides of non-metals and metals are acidic in nature. (e) A less reactive metal replaces a more reactive metal from its salt solution in water.

2634.

Question: Some of the following statements are incorrect. Find the incorrect statements and correct them.(a) The property of metals by virtue of which they can be drawn into wires is called ductility.(b) Metals are good conductors of electricity but poor conductors of heat.(c) Articles made of metals produce a ringing sound when struck hard.(d) Oxides of non-metals and metals are acidic in nature.(e) A less reactive metal replaces a more reactive metal from its salt solution in water.

Answer»

Question: Some of the following statements are incorrect. Find the incorrect statements and correct them.

(a) The property of metals by virtue of which they can be drawn into wires is called ductility.

(b) Metals are good conductors of electricity but poor conductors of heat.

(c) Articles made of metals produce a ringing sound when struck hard.

(d) Oxides of non-metals and metals are acidic in nature.

(e) A less reactive metal replaces a more reactive metal from its salt solution in water.

Discussion

2635.	What do you mean by sublimation? Explain with suitable examples. Write the properties of these substances.(water, glass, chalk, iron ball, sugar, salt)
Answer» What do you mean by sublimation? Explain with suitable examples. Write the properties of these substances. (water, glass, chalk, iron ball, sugar, salt)

2635.

What do you mean by sublimation? Explain with suitable examples. Write the properties of these substances.(water, glass, chalk, iron ball, sugar, salt)

Answer»

What do you mean by sublimation? Explain with suitable examples. Write the properties of these substances.

(water, glass, chalk, iron ball, sugar, salt)

Discussion

2636.	You go to the market and buy a toy. After coming home you remove the plastic packaging material in which the toy is wrapped, and throw it carelessly in a drain outside your home. What can be the result of your carelessness? What should you have done?
Answer» You go to the market and buy a toy. After coming home you remove the plastic packaging material in which the toy is wrapped, and throw it carelessly in a drain outside your home. What can be the result of your carelessness? What should you have done?

Discussion

2637.	A sheet of paper is used to make a paper boat. This is a:
Answer» A sheet of paper is used to make a paper boat. This is a:

2637.

A sheet of paper is used to make a paper boat. This is a:

Answer»

A sheet of paper is used to make a paper boat. This is a:

Discussion

2638.	State 2 laws of chemical combination.
Answer» State 2 laws of chemical combination.

Discussion

2639.	Give one example for each of the following types of mixtures. (a) solid-solid homogeneous mixture (b) solid-liquid heterogeneous mixture (c) misicible liquids (d) liquid-gas homogeneous mixture
Answer» Give one example for each of the following types of mixtures. (a) solid-solid homogeneous mixture (b) solid-liquid heterogeneous mixture (c) misicible liquids (d) liquid-gas homogeneous mixture

2639.

Give one example for each of the following types of mixtures. (a) solid-solid homogeneous mixture (b) solid-liquid heterogeneous mixture (c) misicible liquids (d) liquid-gas homogeneous mixture

Answer»

Give one example for each of the following types of mixtures.

(a) solid-solid homogeneous mixture

(b) solid-liquid heterogeneous mixture

(c) misicible liquids

(d) liquid-gas homogeneous mixture

Discussion

2640.	Choose the elements with their correct symbols.
Answer» Choose the elements with their correct symbols.

Discussion

2641.	Suggest a method to liquefy atmospheric gases.
Answer» Suggest a method to liquefy atmospheric gases.

Discussion

2642.	(a) Differentiate between physical and chemical changes.(b) Give reasons:(i) Ripening of fruit is a desirable change.(ii) Curdling of milk is a slow change.(ii) Digestion of food is an irreversible change.
Answer» (a) Differentiate between physical and chemical changes. (b) Give reasons: (i) Ripening of fruit is a desirable change. (ii) Curdling of milk is a slow change. (ii) Digestion of food is an irreversible change.

Discussion

2643.	Which of the following can change the colour of blue litmus to red?
Answer» Which of the following can change the colour of blue litmus to red?

Discussion

2644.	{ †ext { 56. Which one is not related with benzene? } } { †ext { (1) Ladenberg's prism formula } } { †ext { (2) Armstrong and Baeyer's centric formula } } { †ext { (3) Claus diagonal formula } } { †ext { (4) Crown shape formula }
Answer» { †ext { 56. Which one is not related with benzene? } } { †ext { (1) Ladenberg's prism formula } } { †ext { (2) Armstrong and Baeyer's centric formula } } { †ext { (3) Claus diagonal formula } } { †ext { (4) Crown shape formula }

Discussion

2645.	Some properties are listed in the following table. Distinguish between metals and non-metals on the basis of these properties.PropertiesMetalsNon−metals1. Appearance2. Hardness3. Malleability4. Ductility5. Heat Conduction6. Conduction of Electricity
Answer» Some properties are listed in the following table. Distinguish between metals and non-metals on the basis of these properties. $\begin{matrix} P r o p e r t i e s & M e t a l s & N o n - m e t a l s 1. A p p e a r a n c e 2. H a r d n e s s 3. M a l l e a b i l i t y 4. D u c t i l i t y 5. H e a t C o n d u c t i o n 6. C o n d u c t i o n o f E l e c t r i c i t y \end{matrix}$

Discussion

2646.	why diamond conducts more heat than coppe
Answer» why diamond conducts more heat than coppe

Discussion

2647.	38. How many members of formula C4H10O are possible 1)2 2)3 3)4 4)1
Answer» 38. How many members of formula C4H10O are possible 1)2 2)3 3)4 4)1

Discussion

2648.	What is a solvent in CuSO4.5H20 molecule
Answer» What is a solvent in CuSO4.5H20 molecule

Discussion

2649.	Which of the following is used in the contact tower?
Answer» Which of the following is used in the contact tower?

Discussion

2650.	How to find the kinetic energy of an atom (in joule,eV)?
Answer» How to find the kinetic energy of an atom (in joule,eV)?

Discussion

Explore topic-wise InterviewSolutions in .

Is any certain rule followed while writing the formulae of compounds, like ammonia is written as NH3 but not H3N?The ionic compounds' formulae are written as Cation + Anion.But what about the covalent compounds?

ntderive d relation bw molar conductivity nd conductivityyn

Drying of wet clothes in an open terrace takes place due to the phenomenon of___ .

Question 11Petroleum was formed from organisms:(a) living on the land(b) living on the plants(c) living in the sea(d) living on the rocks

What is polar solution and non-polar solution?

Write down the various exceptions in physical properties of non metals.

a. What happens when copper carbonate is heated strongly?b. What happens when Cl2 gas is passed through the KI solution?

In which of the following forms is oil trapped inside the Earth?

Coal tar is a

Drinking water cab be made absolutely safe by adding some: (a) aspirin tablets (b) iodine tablets (c) chlorine tablets (d) chlorophyll tablets

Which zone of a flame does a goldsmith use for melting gold and silver and why? ​

__________ and __________ are strong electrolytes.

On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

How does atom gain stability when it revolves in different sheels

Question 3.1 Write a balanced chemical equation with state symbols for the reaction:The solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Explain the principle which governs the separation of coloured components present in black ink, using chromatography.

Which one of the following sentence is incorrect about extraction of metals? The extraction of metals from its ore depends on:

How can we represent a compound?

Give two uses of: (a) Carbon (b) Carbon dioxide (c) Methane

A gas completely occupies the vessel in which it is kept. Justify.

10g of ice at 0c is mixed with 100g of water at 50c. What is the resul†an t temperature of mixture?

Coal is majorly composed of

Basic form of matter that cannot be broken down into simpler substances by chemical reactions is called:

An element X forms an ion having a charge of +4 while another element Y forms an ion having a charge of −2. What will be the chemical formula of the compound formed by the combination of X and Y?

What weight of BaCl2 (in grams) would react with 24.4 g of sodium sulphate to produce 46.6 g of barium sulphate and 23.4 g of sodium chloride?(Given, BaCl2+Na2SO4→BaSO4+2NaCl

60 What is maximum number of electron which can be accommodated in an atom in which the highest principal quantum number value is 4:

52. The radius of an atom of He is 0.05 nm. Assuming that one mole of a gas occupies 22.4 litres at STP, the fraction of the volume occupied by the atoms in a mole of He gas at STP is: A. 1.4 × 10−4. B. 1.4 × 10−5. C. 7.1 × 10−4. D. 7.1 × 10−5.

why does helium have very low solubility even in very high pressure?

Which of the following statements is not true for a base?

multiply z1=1+i and z2=root 3 +i using euler form

Sodium and potassium are stored in kerosene

Reductive ozonolysis of natural rubber will give

What do you mean by sublimation? Explain with suitable examples. Write the properties of these substances.(water, glass, chalk, iron ball, sugar, salt)

You go to the market and buy a toy. After coming home you remove the plastic packaging material in which the toy is wrapped, and throw it carelessly in a drain outside your home. What can be the result of your carelessness? What should you have done?

A sheet of paper is used to make a paper boat. This is a:

State 2 laws of chemical combination.

Give one example for each of the following types of mixtures. (a) solid-solid homogeneous mixture (b) solid-liquid heterogeneous mixture (c) misicible liquids (d) liquid-gas homogeneous mixture

Choose the elements with their correct symbols.

Suggest a method to liquefy atmospheric gases.

(a) Differentiate between physical and chemical changes.(b) Give reasons:(i) Ripening of fruit is a desirable change.(ii) Curdling of milk is a slow change.(ii) Digestion of food is an irreversible change.

Which of the following can change the colour of blue litmus to red?

{ †ext { 56. Which one is not related with benzene? } } { †ext { (1) Ladenberg's prism formula } } { †ext { (2) Armstrong and Baeyer's centric formula } } { †ext { (3) Claus diagonal formula } } { †ext { (4) Crown shape formula }

Some properties are listed in the following table. Distinguish between metals and non-metals on the basis of these properties.PropertiesMetalsNon−metals1. Appearance2. Hardness3. Malleability4. Ductility5. Heat Conduction6. Conduction of Electricity

why diamond conducts more heat than coppe

38. How many members of formula C4H10O are possible 1)2 2)3 3)4 4)1

What is a solvent in CuSO4.5H20 molecule

Which of the following is used in the contact tower?

How to find the kinetic energy of an atom (in joule,eV)?

Which zone of a flame does a goldsmith use for melting gold and silver and why?

and are strong electrolytes.