7248 + Interview Questions in Chemistry Page 138 InterviewSolution

6851.	Why are particles closely packed in solids and not in liquids or gases?
Answer» Why are particles closely packed in solids and not in liquids or gases?

Discussion

6852.	Polycot is obtained from the mixture oh what?
Answer» Polycot is obtained from the mixture oh what?

Discussion

6853.	Compound X consists of molecules . What type of bonding takes place and why
Answer» Compound X consists of molecules . What type of bonding takes place and why

Discussion

6854.	Acrylic is -
Answer» Acrylic is -

Discussion

6855.	Which of the following gases cause the greenhouse effect?
Answer» Which of the following gases cause the greenhouse effect?

Discussion

6856.	What are the reasons of deforestation
Answer» What are the reasons of deforestation

Discussion

6857.	Write the balanced equation for : 1) copper is heated at a very high temperature 2) Aluminium reacts with nitric acid 3) An iron nail is placed in copper sulphate solution
Answer» Write the balanced equation for : 1) copper is heated at a very high temperature 2) Aluminium reacts with nitric acid 3) An iron nail is placed in copper sulphate solution

Discussion

6858.	Work done by a frictional force can be
Answer» Work done by a frictional force can be

Discussion

6859.	When silver metal is added to a solution of iron nitrate, what will happen?
Answer» When silver metal is added to a solution of iron nitrate, what will happen?

Discussion

6860.	Identify the measures which could be taken to stop a fire.
Answer» Identify the measures which could be taken to stop a fire.

Discussion

6861.	Write a short note on properties of plastics. [3 MARKS]
Answer» Write a short note on properties of plastics. [3 MARKS]

Discussion

6862.	A dilute solution of sodium carbonate was added to two test tubes - one containing dilute HCl (A) and the other containing dilute NaOH (B). The correct observation was
Answer» A dilute solution of sodium carbonate was added to two test tubes - one containing dilute $H C l$ (A) and the other containing dilute $N a O H$ (B). The correct observation was

Discussion

6863.	A block of ice at −10oC is slowly heated and converted to steam at 100oC. Which of the following curves represents the phenomenon qualitatively?
Answer» A block of ice at $- 10^{o} C$ is slowly heated and converted to steam at $100^{o} C .$ Which of the following curves represents the phenomenon qualitatively?

Discussion

6864.	What type of shirts should we buy for summer : cotton shirts or shirts made from sythetic materials (like polyester) ? Give reason for your answer.
Answer» What type of shirts should we buy for summer : cotton shirts or shirts made from sythetic materials (like polyester) ? Give reason for your answer.

Discussion

6865.	The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is : (a) nylon (b) rayon (c) polyester (d) acrylic
Answer» The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is : (a) nylon (b) rayon (c) polyester (d) acrylic

6865.

The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is : (a) nylon (b) rayon (c) polyester (d) acrylic

Answer»

The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is :

(a) nylon (b) rayon (c) polyester (d) acrylic

Discussion

6866.	Which of the two has a lower ignition temperature : petrol or kerosene ?
Answer» Which of the two has a lower ignition temperature : petrol or kerosene ?

Discussion

6867.	Which one of the following measures in the 3R's means to use resources judiciously?
Answer» Which one of the following measures in the 3R's means to use resources judiciously?

Discussion

6868.	Consider the following statements. I. Gaseous substances whose critical temperatures are above room temperatures can be liquefied by applying sufficient pressure to the gas. II. Gaseous substances whose critical temperatures are below room temperature can be liquefied by the application of pressure and lowering of temperature below Tc. Select the correct alternate.
Answer» Consider the following statements. I. Gaseous substances whose critical temperatures are above room temperatures can be liquefied by applying sufficient pressure to the gas. II. Gaseous substances whose critical temperatures are below room temperature can be liquefied by the application of pressure and lowering of temperature below $T_{c}$ . Select the correct alternate.

6868.

Consider the following statements. I. Gaseous substances whose critical temperatures are above room temperatures can be liquefied by applying sufficient pressure to the gas. II. Gaseous substances whose critical temperatures are below room temperature can be liquefied by the application of pressure and lowering of temperature below Tc. Select the correct alternate.

Answer»

Consider the following statements.

I. Gaseous substances whose critical temperatures are above room temperatures can be liquefied by applying sufficient pressure to the gas.

II. Gaseous substances whose critical temperatures are below room temperature can be liquefied by the application of pressure and lowering of temperature below $T_{c}$ .

Select the correct alternate.

Discussion

6869.	The least metallic element of group 1 is :-
Answer» The least metallic element of group 1 is :-

Discussion

6870.	Is it true that metals are not monoatomic?
Answer» Is it true that metals are not monoatomic?

Discussion

6871.	There were plenty of Ganges river dolphins, but very few are left now. Why? [3 MARKS]
Answer» There were plenty of Ganges river dolphins, but very few are left now. Why? [3 MARKS]

Discussion

6872.	How can we obtain valency if we know the atomic no. For example the atomic number of oxygen is 2,6(8) then what is the valancy?
Answer» How can we obtain valency if we know the atomic no. For example the atomic number of oxygen is 2,6(8) then what is the valancy?

Discussion

6873.	Dosa is made from its batter, which is a liquid. When we heat the batter on the pan, a solid, dosa is formed. How can heating a liquid change into a solid?
Answer» Dosa is made from its batter, which is a liquid. When we heat the batter on the pan, a solid, dosa is formed. How can heating a liquid change into a solid?

Discussion

6874.	Which of the following can be used as a method for secondary oil recovery? 1) Water flooding 2) Surfactants injection 3) CO2 injection 4) Microbial injection
Answer» Which of the following can be used as a method for secondary oil recovery? 1) Water flooding 2) Surfactants injection 3) $C O_{2}$ injection 4) Microbial injection

6874.

Which of the following can be used as a method for secondary oil recovery? 1) Water flooding 2) Surfactants injection 3) CO2 injection 4) Microbial injection

Answer»

Which of the following can be used as a method for secondary oil recovery?

1) Water flooding

2) Surfactants injection

3) $C O_{2}$ injection

4) Microbial injection

Discussion

6875.	Laboratory preparation of hydrogen
Answer» Laboratory preparation of hydrogen

Discussion

6876.	Why is water droplets seen in spherical shape ?
Answer» Why is water droplets seen in spherical shape ?

Discussion

6877.	Which of the following is/are NOT recyclable material(s)?
Answer» Which of the following is/are NOT recyclable material(s)?

Discussion

6878.	Incomplete combustion of methane forms –
Answer» Incomplete combustion of methane forms –

Discussion

6879.	A tightly closed container contains 500 ml of gas. Now, the gas is carefully transported into a 1000 ml container without any leakage. What is the volume of gas in the new container?
Answer» A tightly closed container contains 500 ml of gas. Now, the gas is carefully transported into a 1000 ml container without any leakage. What is the volume of gas in the new container?

Discussion

6880.	The technology used in assessing the oil reservoir is:
Answer» The technology used in assessing the oil reservoir is:

Discussion

6881.

Which of the following statements regarding thermoplastics and thermosetting plastics is/are true? Thermoplastics Thermosetting plastics A Soft Hard B Able to withstand heat Cannot withstand heat C No cross-linkages Cross-linkage present

Answer»

Which of the following statements regarding thermoplastics and thermosetting plastics is/are true?

	Thermoplastics	Thermosetting plastics
A	Soft	Hard
B	Able to withstand heat	Cannot withstand heat
C	No cross-linkages	Cross-linkage present

Discussion

6882.	The process of separation of different constituents of petroleum is known as ___.
Answer» The process of separation of different constituents of petroleum is known as ___.

Discussion

6883.	Which of these are the properties of non-metals ?
Answer» Which of these are the properties of non-metals ?

Discussion

6884.	What is the name of the very effective water distribution system used since 400 years ago in Himachal Pradesh?
Answer» What is the name of the very effective water distribution system used since 400 years ago in Himachal Pradesh?

Discussion

6885.	List any five important uses of non metals. [5 MARKS]
Answer» List any five important uses of non metals. [5 MARKS]

Discussion

6886.	How many processes shown in the following images are endothermic? 2
Answer» How many processes shown in the following images are endothermic? 2

Discussion

6887.	Why can't the crude oil extracted from the earth's crust be used as petrol?
Answer» Why can't the crude oil extracted from the earth's crust be used as petrol?

Discussion

6888.	At what temperature, the volume of a given amount of water is least for a given mass of water?
Answer» At what temperature, the volume of a given amount of water is least for a given mass of water?

Discussion

6889.	There were plenty of Ganges river dolphins, but very few are left now. This is because ________.
Answer» There were plenty of Ganges river dolphins, but very few are left now. This is because ________.

Discussion

6890.	State the law of conversion of mass.
Answer» State the law of conversion of mass.

Discussion

6891.	Which particles are considered as heavy and remain fixed in their positions?
Answer» Which particles are considered as heavy and remain fixed in their positions?

Discussion

6892.	How is the concentration of H3O+ ions affected when a solution of an acid is diluted? [1 MARK]
Answer» How is the concentration of $H_{3} O^{+}$ ions affected when a solution of an acid is diluted? [1 MARK]

Discussion

6893.	Comment on the statement ' evaporation is a surface phenomenon '
Answer» Comment on the statement ' evaporation is a surface phenomenon '

Discussion

6894.	Is crude oil a mixture or a compound? Explain
Answer» Is crude oil a mixture or a compound? Explain

Discussion

6895.	In the reaction 3MnO2+4Al→3Mn+2Al2O3 ,the oxidising agent is :
Answer» In the reaction $3 M n O_{2} + 4 A l \to 3 M n + 2 A l_{2} O_{3}$ ,the oxidising agent is :

Discussion

6896.	Consider the following reaction. Cu(NO3)2→CuO+NO2+O2 Which of the following statement is correct?
Answer» Consider the following reaction. $C u (N O_{3})_{2} \to C u O + N O_{2} + O_{2}$ Which of the following statement is correct?

6896.

Consider the following reaction. Cu(NO3)2→CuO+NO2+O2 Which of the following statement is correct?

Answer»

Consider the following reaction.

$C u (N O_{3})_{2} \to C u O + N O_{2} + O_{2}$
Which of the following statement is correct?

Discussion

6897.	What were the conclusions made by Rutherford regarding the atomic mass?
Answer» What were the conclusions made by Rutherford regarding the atomic mass?

Discussion

6898.	Question 3 (c) Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). c. Find the solubility of each salt at 293 K. Which salt has the highest solubility at this temperature?
Answer» Question 3 (c) Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). c. Find the solubility of each salt at 293 K. Which salt has the highest solubility at this temperature?

Discussion

6899.	Explain the mechanism of cleansing action of soaps.
Answer» Explain the mechanism of cleansing action of soaps.

Discussion

6900.	.The ignition temperature of white phosphorus is 35 degrees. What will happen if it is kept in a room in summer when the temperature rises to 35 degrees? H
Answer» .The ignition temperature of white phosphorus is 35 degrees. What will happen if it is kept in a room in summer when the temperature rises to 35 degrees? H

Discussion

Explore topic-wise InterviewSolutions in .

Why are particles closely packed in solids and not in liquids or gases?

Polycot is obtained from the mixture oh what?

Compound X consists of molecules . What type of bonding takes place and why

Acrylic is -

Which of the following gases cause the greenhouse effect?

What are the reasons of deforestation

Write the balanced equation for : 1) copper is heated at a very high temperature 2) Aluminium reacts with nitric acid 3) An iron nail is placed in copper sulphate solution

Work done by a frictional force can be

When silver metal is added to a solution of iron nitrate, what will happen?

Identify the measures which could be taken to stop a fire.

Write a short note on properties of plastics. [3 MARKS]

A dilute solution of sodium carbonate was added to two test tubes - one containing dilute HCl (A) and the other containing dilute NaOH (B). The correct observation was

A block of ice at −10oC is slowly heated and converted to steam at 100oC. Which of the following curves represents the phenomenon qualitatively?

What type of shirts should we buy for summer : cotton shirts or shirts made from sythetic materials (like polyester) ? Give reason for your answer.

The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is : (a) nylon (b) rayon (c) polyester (d) acrylic

Which of the two has a lower ignition temperature : petrol or kerosene ?

Which one of the following measures in the 3R's means to use resources judiciously?

The least metallic element of group 1 is :-

Is it true that metals are not monoatomic?

There were plenty of Ganges river dolphins, but very few are left now. Why? [3 MARKS]

How can we obtain valency if we know the atomic no. For example the atomic number of oxygen is 2,6(8) then what is the valancy?

Dosa is made from its batter, which is a liquid. When we heat the batter on the pan, a solid, dosa is formed. How can heating a liquid change into a solid?

Which of the following can be used as a method for secondary oil recovery? 1) Water flooding 2) Surfactants injection 3) CO2 injection 4) Microbial injection

Laboratory preparation of hydrogen

Why is water droplets seen in spherical shape ?

Which of the following is/are NOT recyclable material(s)?

Incomplete combustion of methane forms –

A tightly closed container contains 500 ml of gas. Now, the gas is carefully transported into a 1000 ml container without any leakage. What is the volume of gas in the new container?

The technology used in assessing the oil reservoir is:

Which of the following statements regarding thermoplastics and thermosetting plastics is/are true? Thermoplastics Thermosetting plastics A Soft Hard B Able to withstand heat Cannot withstand heat C No cross-linkages Cross-linkage present

The process of separation of different constituents of petroleum is known as ___.

Which of these are the properties of non-metals ?

What is the name of the very effective water distribution system used since 400 years ago in Himachal Pradesh?

List any five important uses of non metals. [5 MARKS]

How many processes shown in the following images are endothermic? 2

Why can't the crude oil extracted from the earth's crust be used as petrol?

At what temperature, the volume of a given amount of water is least for a given mass of water?

There were plenty of Ganges river dolphins, but very few are left now. This is because ________.

State the law of conversion of mass.

Which particles are considered as heavy and remain fixed in their positions?

How is the concentration of H3O+ ions affected when a solution of an acid is diluted? [1 MARK]

Comment on the statement ' evaporation is a surface phenomenon '

Is crude oil a mixture or a compound? Explain

In the reaction 3MnO2+4Al→3Mn+2Al2O3 ,the oxidising agent is :

Consider the following reaction. Cu(NO3)2→CuO+NO2+O2 Which of the following statement is correct?

What were the conclusions made by Rutherford regarding the atomic mass?

Explain the mechanism of cleansing action of soaps.

.The ignition temperature of white phosphorus is 35 degrees. What will happen if it is kept in a room in summer when the temperature rises to 35 degrees? H