7248 + Interview Questions in Chemistry Page 72 InterviewSolution

3551.	Mention some simple steps you could take individually to reduce the usage of petroleum. [2 MARKS]
Answer» Mention some simple steps you could take individually to reduce the usage of petroleum. [2 MARKS]

Discussion

3552.	What are the health hazards that people are faced with when the top soil gets washed away by the wind due to lack of adequate vegetation cover? [2 MARKS]
Answer» What are the health hazards that people are faced with when the top soil gets washed away by the wind due to lack of adequate vegetation cover? [2 MARKS]

Discussion

3553.	The ionization energy of the electron in the lowestorbit of hydrogen atom is 13.6 eV. The energiesrequired in eV to remove electron from three lowestorbits of hydrogen atom are
Answer» The ionization energy of the electron in the lowestorbit of hydrogen atom is 13.6 eV. The energiesrequired in eV to remove electron from three lowestorbits of hydrogen atom are

Discussion

3554.	why does lithium react with hydrated chloride while sodium , cesium cannot
Answer» why does lithium react with hydrated chloride while sodium , cesium cannot

Discussion

3555.	Which one of the following is an inexhaustible natural resource ? (a) coal (b) petroleum (c) water (d) forests
Answer» Which one of the following is an inexhaustible natural resource ? (a) coal (b) petroleum (c) water (d) forests

3555.

Which one of the following is an inexhaustible natural resource ? (a) coal (b) petroleum (c) water (d) forests

Answer»

Which one of the following is an inexhaustible natural resource ?

(a) coal

(b) petroleum

(c) water

(d) forests

Discussion

3556.	Q 8/15 What would be amount of carbon dioxideproduced when 1 kg of carbon is completely burnt inair?
Answer» Q 8/15 What would be amount of carbon dioxideproduced when 1 kg of carbon is completely burnt inair?

Discussion

3557.	A sample of ammonium phosphate (NH⁴)³PO⁴ contains 3.18 moles of hydrogen atoms . the no. of moles of oxygen atoms in the sample is
Answer» A sample of ammonium phosphate (NH⁴)³PO⁴ contains 3.18 moles of hydrogen atoms . the no. of moles of oxygen atoms in the sample is

Discussion

3558.	How does a centrifuge work?
Answer» How does a centrifuge work?

Discussion

3559.	Is carbon dioxide always formed when a hydrocarbon is burnt?
Answer» Is carbon dioxide always formed when a hydrocarbon is burnt?

Discussion

3560.	When Magnesium Sulphate reacts with copper the product is no reaction but when copper sulphate reacts with iron the product is ferrous sulphate and copper.why??
Answer» When Magnesium Sulphate reacts with copper the product is no reaction but when copper sulphate reacts with iron the product is ferrous sulphate and copper.why??

Discussion

3561.	Which Greek thinker named parmanu as atom?
Answer» Which Greek thinker named parmanu as atom?

Discussion

3562.	What is the best way to dispose the leaves fallen from the trees?
Answer» What is the best way to dispose the leaves fallen from the trees?

Discussion

3563.	What do you understand by Green House effect ?
Answer» What do you understand by Green House effect ?

Discussion

3564.	Why is evaporation faster in the case of a china dish than a test tube?
Answer» Why is evaporation faster in the case of a china dish than a test tube?

Discussion

3565.	Answer the following questions.(a) What is the difference between the models of the atom proposed by Thomson and by Rutherford?(b) What is the characteristic property of the element hydrogen?(c) What is meant by valency?(d) What is meant by atomic mass number?(e) Name the fundamental particles in an atom.
Answer» Answer the following questions. (a) What is the difference between the models of the atom proposed by Thomson and by Rutherford? (b) What is the characteristic property of the element hydrogen? (c) What is meant by valency? (d) What is meant by atomic mass number? (e) Name the fundamental particles in an atom.

3565.

Answer the following questions.(a) What is the difference between the models of the atom proposed by Thomson and by Rutherford?(b) What is the characteristic property of the element hydrogen?(c) What is meant by valency?(d) What is meant by atomic mass number?(e) Name the fundamental particles in an atom.

Answer»

Answer the following questions.

(a) What is the difference between the models of the atom proposed by Thomson and by Rutherford?

(b) What is the characteristic property of the element hydrogen?

(c) What is meant by valency?

(d) What is meant by atomic mass number?

(e) Name the fundamental particles in an atom.

Discussion

3566.	Complete the crossword given in Fig. 4.3 with the help of the clues.Across1. Which is generally hard, ductile, malleable and sonorous.2. A metal is called so it can be drawn into wires.3. Metal bells are used because of this property.Down4. A metal generally used for making jewellery.5. A metal which is liquid at room temperature.6. A metal which reacts with acid as well as base to formhydrogen gas.7. Substances used to enhance the growth of plants.8. Property by virtue of which metals can be beaten into thinsheets.
Answer» Complete the crossword given in Fig. 4.3 with the help of the clues. Across 1. Which is generally hard, ductile, malleable and sonorous. 2. A metal is called so it can be drawn into wires. 3. Metal bells are used because of this property. Down 4. A metal generally used for making jewellery. 5. A metal which is liquid at room temperature. 6. A metal which reacts with acid as well as base to form hydrogen gas. 7. Substances used to enhance the growth of plants. 8. Property by virtue of which metals can be beaten into thin sheets.

3566.

Complete the crossword given in Fig. 4.3 with the help of the clues.Across1. Which is generally hard, ductile, malleable and sonorous.2. A metal is called so it can be drawn into wires.3. Metal bells are used because of this property.Down4. A metal generally used for making jewellery.5. A metal which is liquid at room temperature.6. A metal which reacts with acid as well as base to formhydrogen gas.7. Substances used to enhance the growth of plants.8. Property by virtue of which metals can be beaten into thinsheets.

Answer» Complete the crossword given in Fig. 4.3 with the help of the clues.

Across

1. Which is generally hard, ductile, malleable and sonorous.

2. A metal is called so it can be drawn into wires.

3. Metal bells are used because of this property.

Down

4. A metal generally used for making jewellery.

5. A metal which is liquid at room temperature.

6. A metal which reacts with acid as well as base to form

hydrogen gas.

7. Substances used to enhance the growth of plants.

8. Property by virtue of which metals can be beaten into thin

sheets.

Discussion

3567.	define homogenous and heterogenous
Answer» define homogenous and heterogenous

Discussion

3568.	how to determine order of ionic character of bond in KCl,CuCl,CuCl2 and SnCl2
Answer» how to determine order of ionic character of bond in KCl,CuCl,CuCl2 and SnCl2

Discussion

3569.	Which of the following are matter?Chair, air, love, smell, hate, almonds, thought, cold, cold drink.
Answer» Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold drink.

Discussion

3570.	(a) Define element and compound.(b) Why is CO2 a compound?
Answer» $(a) Define element and compound.$ $(b) Why is C O_{2} a compound?$

Discussion

3571.	what is the sequence ofmain shellsa and orbitals used for donating/giving electrons during making bonding?
Answer» what is the sequence ofmain shellsa and orbitals used for donating/giving electrons during making bonding?

Discussion

3572.	Based on the activity series, which of the following can displace iron from its salt?
Answer» Based on the activity series, which of the following can displace iron from its salt?

Discussion

3573.	The common names of Cao and Ca(OH)_2 respectively are _____________ and ____________.
Answer» The common names of Cao and Ca(OH)_2 respectively are _____________ and ____________.

Discussion

3574.	Flames of different substances __________ colours.
Answer» Flames of different substances __________ colours.

Discussion

3575.	Conductivity of 0.12M cuSo4 solution at 298K is 1.8/100 S/cm. Calculate its equivalent Conductivity.
Answer» Conductivity of 0.12M cuSo4 solution at 298K is 1.8/100 S/cm. Calculate its equivalent Conductivity.

Discussion

3576.	Among the two reactions, which one will be faster?
Answer» Among the two reactions, which one will be faster?

3576.

Among the two reactions, which one will be faster?

Answer»

Among the two reactions, which one will be faster?

Discussion

3577.	A thermometer has 2 fixed points 5 and 95 When this thermometer is kept in hot water it reads 59 The temperature of the body in degree celsius will be
Answer» A thermometer has 2 fixed points 5 and 95 When this thermometer is kept in hot water it reads 59 The temperature of the body in degree celsius will be

Discussion

3578.	It was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?
Answer» It was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?

Discussion

3579.	Which of the following energies do water stored in a dam and the water flowing from it contain respectively?
Answer» Which of the following energies do water stored in a dam and the water flowing from it contain respectively?

Discussion

3580.

Composition of the nuclei of two atomic species X and Y are given as under X Y Proton = 6 6 Neutrons = 6 8 Give the mass numbers of X and Y. What is the relation between the two species?

Answer» Composition of the nuclei of two atomic species X and Y are given as under

		X	Y
Proton	=	6	6
Neutrons	=	6	8

Give the mass numbers of X and Y. What is the relation between the two species?

Discussion

3581.	Which one of the following is a second order reaction?
Answer» Which one of the following is a second order reaction?

Discussion

3582.	What do you mean by water pollution? Describe it's sources and it's harmful effect and how we can minimize it.(1+1+1.5+1.5 mark)
Answer» What do you mean by water pollution? Describe it's sources and it's harmful effect and how we can minimize it.(1+1+1.5+1.5 mark)

Discussion

3583.	At equilibrium which is correct?
Answer» At equilibrium which is correct?

Discussion

3584.	Describe bohr's model of the atom. How did Niels Bohr explain the stability of atom?
Answer» Describe bohr's model of the atom. How did Niels Bohr explain the stability of atom?

Discussion

3585.	Which synthetic fibre feels like wool and used as a substitute for wool ?
Answer» Which synthetic fibre feels like wool and used as a substitute for wool ?

Discussion

3586.	Structure of super oxide of oxygen
Answer» Structure of super oxide of oxygen

Discussion

3587.	Question 16Which one of the following processes involves chemical reactions?(a) Storing of oxygen gas under pressure in a gas cylinder.(b) Liquefaction of air.(c) Keeping petrol in a china dish in the open.(d) Heating copper wire in presence of air at high temperature.
Answer» Question 16 Which one of the following processes involves chemical reactions? (a) Storing of oxygen gas under pressure in a gas cylinder. (b) Liquefaction of air. (c) Keeping petrol in a china dish in the open. (d) Heating copper wire in presence of air at high temperature.

Discussion

3588.	Pls tell in increasing order of strength:- Jute, Silk, Nylon, Wool, Cotton, Polyester. which is the strongest and weakest?
Answer» Pls tell in increasing order of strength:- Jute, Silk, Nylon, Wool, Cotton, Polyester. which is the strongest and weakest?

3588.

Pls tell in increasing order of strength:- Jute, Silk, Nylon, Wool, Cotton, Polyester. which is the strongest and weakest?

Answer»

Pls tell in increasing order of strength:-

Jute, Silk, Nylon, Wool, Cotton, Polyester.

which is the strongest and weakest?

Discussion

3589.	Among alkali metals, which gives a yellow colour during flame test?
Answer» Among alkali metals, which gives a yellow colour during flame test?

Discussion

3590.	A solution contains 50 g of common salt in 400 g of water. Calculate the concentration by mass percentage of the solution.
Answer» A solution contains 50 g of common salt in 400 g of water. Calculate the concentration by mass percentage of the solution.

Discussion

3591.	Which of the following law is obeyed during the balancing of a chemical equation?
Answer» Which of the following law is obeyed during the balancing of a chemical equation?

Discussion

3592.	What is atom ,nucleas and molucules
Answer» What is atom ,nucleas and molucules

Discussion

3593.	Water,which wets glass, is stuck between two parallel glass plates.The distance between the plates is d1 and the diameter of the trapped water disk is D>>>d. What is the force acting between the plates if surface tension is S.
Answer» Water,which wets glass, is stuck between two parallel glass plates.The distance between the plates is d1 and the diameter of the trapped water disk is D>>>d. What is the force acting between the plates if surface tension is S.

Discussion

3594.	If a metal coin is dropped on hard floor, it produces a ringing sound.What is this property of metals known as?
Answer» If a metal coin is dropped on hard floor, it produces a ringing sound.What is this property of metals known as?

Discussion

3595.	Among the following which metal catches fire quickly a) sodium b) potassium c) both (a) and (b) d) none of thes
Answer» Among the following which metal catches fire quickly a) sodium b) potassium c) both (a) and (b) d) none of thes

Discussion

3596.	Question 58A solution of CuSO4 was kept in an iron pot. After a few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.
Answer» Question 58 A solution of ${CuSO}_{4}$ was kept in an iron pot. After a few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.

Discussion

3597.	What is the valency of calcium?(atomic number = 20)
Answer» What is the valency of calcium? (atomic number = 20)

Discussion

3598.	Describe the characteristics and uses of the coke
Answer» Describe the characteristics and uses of the coke

Discussion

3599.	(a) Calculate the relative molecular mass of water (H2O).(b) Calculate the molecular mass of HNO3.
Answer» (a) Calculate the relative molecular mass of water (H2O). (b) Calculate the molecular mass of HNO3.

3599.

(a) Calculate the relative molecular mass of water (H2O).(b) Calculate the molecular mass of HNO3.

Answer»

(a) Calculate the relative molecular mass of water (H2O).

(b) Calculate the molecular mass of HNO3.

Discussion

3600.	what is organic solvents?[pl. explain in easy words]w
Answer» what is organic solvents?[pl. explain in easy words] w

Discussion

Explore topic-wise InterviewSolutions in .

Mention some simple steps you could take individually to reduce the usage of petroleum. [2 MARKS]

What are the health hazards that people are faced with when the top soil gets washed away by the wind due to lack of adequate vegetation cover? [2 MARKS]

The ionization energy of the electron in the lowestorbit of hydrogen atom is 13.6 eV. The energiesrequired in eV to remove electron from three lowestorbits of hydrogen atom are

why does lithium react with hydrated chloride while sodium , cesium cannot

Which one of the following is an inexhaustible natural resource ? (a) coal (b) petroleum (c) water (d) forests

Q 8/15 What would be amount of carbon dioxideproduced when 1 kg of carbon is completely burnt inair?

A sample of ammonium phosphate (NH⁴)³PO⁴ contains 3.18 moles of hydrogen atoms . the no. of moles of oxygen atoms in the sample is

How does a centrifuge work?

Is carbon dioxide always formed when a hydrocarbon is burnt?

When Magnesium Sulphate reacts with copper the product is no reaction but when copper sulphate reacts with iron the product is ferrous sulphate and copper.why??

Which Greek thinker named parmanu as atom?

What is the best way to dispose the leaves fallen from the trees?

What do you understand by Green House effect ?

Why is evaporation faster in the case of a china dish than a test tube?

define homogenous and heterogenous

how to determine order of ionic character of bond in KCl,CuCl,CuCl2 and SnCl2

Which of the following are matter?Chair, air, love, smell, hate, almonds, thought, cold, cold drink.

(a) Define element and compound.(b) Why is CO2 a compound?

what is the sequence ofmain shellsa and orbitals used for donating/giving electrons during making bonding?

Based on the activity series, which of the following can displace iron from its salt?

The common names of Cao and Ca(OH)_2 respectively are _____________ and ____________.

Flames of different substances __________ colours.

Conductivity of 0.12M cuSo4 solution at 298K is 1.8/100 S/cm. Calculate its equivalent Conductivity.

Among the two reactions, which one will be faster?

A thermometer has 2 fixed points 5 and 95 When this thermometer is kept in hot water it reads 59 The temperature of the body in degree celsius will be

It was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?​

Which of the following energies do water stored in a dam and the water flowing from it contain respectively?

Composition of the nuclei of two atomic species X and Y are given as under ​ X Y Proton = 6 6 Neutrons = 6 8 Give the mass numbers of X and Y. What is the relation between the two species?

Which one of the following is a second order reaction?

What do you mean by water pollution? Describe it's sources and it's harmful effect and how we can minimize it.(1+1+1.5+1.5 mark)

At equilibrium which is correct?

Describe bohr's model of the atom. How did Niels Bohr explain the stability of atom?

Which synthetic fibre feels like wool and used as a substitute for wool ?

Structure of super oxide of oxygen

Question 16Which one of the following processes involves chemical reactions?(a) Storing of oxygen gas under pressure in a gas cylinder.(b) Liquefaction of air.(c) Keeping petrol in a china dish in the open.(d) Heating copper wire in presence of air at high temperature.

Pls tell in increasing order of strength:- Jute, Silk, Nylon, Wool, Cotton, Polyester. which is the strongest and weakest?

Among alkali metals, which gives a yellow colour during flame test?

A solution contains 50 g of common salt in 400 g of water. Calculate the concentration by mass percentage of the solution.

Which of the following law is obeyed during the balancing of a chemical equation?

What is atom ,nucleas and molucules

Water,which wets glass, is stuck between two parallel glass plates.The distance between the plates is d1 and the diameter of the trapped water disk is D>>>d. What is the force acting between the plates if surface tension is S.

If a metal coin is dropped on hard floor, it produces a ringing sound.What is this property of metals known as?

Among the following which metal catches fire quickly a) sodium b) potassium c) both (a) and (b) d) none of thes

Question 58A solution of CuSO4 was kept in an iron pot. After a few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.

What is the valency of calcium?(atomic number = 20)

Describe the characteristics and uses of the coke

(a) Calculate the relative molecular mass of water (H2O).(b) Calculate the molecular mass of HNO3.

what is organic solvents?[pl. explain in easy words]w

The common names of Cao and Ca(OH)_2 respectively are _ and .

It was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?

Composition of the nuclei of two atomic species X and Y are given as under X Y Proton = 6 6 Neutrons = 6 8 Give the mass numbers of X and Y. What is the relation between the two species?