7248 + Interview Questions in Chemistry Page 84 InterviewSolution

4151.	What is the relative molecular mass of cane sugar?
Answer» What is the relative molecular mass of cane sugar?

Discussion

4152.	Why we write Hcl as 2HCL in the equation?? And others also like 2AL at the place of AL
Answer» Why we write Hcl as 2HCL in the equation?? And others also like 2AL at the place of AL

4152.

Why we write Hcl as 2HCL in the equation?? And others also like 2AL at the place of AL

Answer»

Why we write Hcl as 2HCL in the equation??

And others also like 2AL at the place of AL

Discussion

4153.	The elements present in mercuric oxide are:
Answer» The elements present in mercuric oxide are:

Discussion

4154.	Why is air called homogeneous mixture?
Answer» Why is air called homogeneous mixture?

Discussion

4155.	The hydrogen bond is shortest in
Answer» The hydrogen bond is shortest in

Discussion

4156.	Define the following terms : (a) Atomic number (b) Mass number (c) Nucleons (d) Valence shell
Answer» Define the following terms : (a) Atomic number (b) Mass number (c) Nucleons (d) Valence shell

4156.

Define the following terms : (a) Atomic number (b) Mass number (c) Nucleons (d) Valence shell

Answer»

Define the following terms :

(a) Atomic number

(b) Mass number

(c) Nucleons

(d) Valence shell

Discussion

4157.	Answer the following questions.(a) What is meant by allotrope? Which are the allotropes of carbon?(b) How is carbon dioxide gas produced in the laboratory?(c) Why is graphite used as a lubricant?(d) How is charcoal made?
Answer» Answer the following questions. (a) What is meant by allotrope? Which are the allotropes of carbon? (b) How is carbon dioxide gas produced in the laboratory? (c) Why is graphite used as a lubricant? (d) How is charcoal made?

4157.

Answer the following questions.(a) What is meant by allotrope? Which are the allotropes of carbon?(b) How is carbon dioxide gas produced in the laboratory?(c) Why is graphite used as a lubricant?(d) How is charcoal made?

Answer»

Answer the following questions.

(a) What is meant by allotrope? Which are the allotropes of carbon?

(b) How is carbon dioxide gas produced in the laboratory?

(c) Why is graphite used as a lubricant?

(d) How is charcoal made?

Discussion

4158.	Generally, non metals are not lustrous. Which of the following non-metal is lustrous?
Answer» Generally, non metals are not lustrous. Which of the following non-metal is lustrous?

4158.

Generally, non metals are not lustrous. Which of the following non-metal is lustrous?

Answer»

Generally, non metals are not lustrous. Which of the following non-metal is lustrous?

Discussion

4159.	How mass of proton is 9 times the mass of Be+3
Answer» How mass of proton is 9 times the mass of Be+3

Discussion

4160.	When metals like Na, K, Ca react with acids like HCL , Hydrogen gas is evolved. Explain why no evolution of hydrogen gas takes place when the same metals react with HNO3.
Answer» When metals like Na, K, Ca react with acids like HCL , Hydrogen gas is evolved. Explain why no evolution of hydrogen gas takes place when the same metals react with HNO3.

Discussion

4161.	Which petroleum product is used in place of coal tar for metalling the roads?
Answer» Which petroleum product is used in place of coal tar for metalling the roads?

Discussion

4162.	Explain how anode rays are produced in a discharge tube.
Answer» Explain how anode rays are produced in a discharge tube.

Discussion

4163.	What would you observe on adding dilute hydrochloric acid to(i) sodium bicarbonate placed in a test tube?(ii) zinc metal in a test tube?
Answer» What would you observe on adding dilute hydrochloric acid to (i) sodium bicarbonate placed in a test tube? (ii) zinc metal in a test tube?

Discussion

4164.	what is polymer and monomer?
Answer» what is polymer and monomer?

Discussion

4165.	What is dimentional formula of resi†an ce× conduc†an ce
Answer» What is dimentional formula of resi†an ce× conduc†an ce

Discussion

4166.	Name the major constituent of Acid rain.
Answer» Name the major constituent of Acid rain.

Discussion

4167.	Ratio of number of atoms present in 50g of CaCO3 and 60 g of SO3 is. 1) 5 : 6. 2) 1: 1. 3) 3 : 5 4) 2 : 5
Answer» Ratio of number of atoms present in 50g of CaCO3 and 60 g of SO3 is. 1) 5 : 6. 2) 1: 1. 3) 3 : 5 4) 2 : 5

Discussion

4168.	Question 29Complete the crossword given below with the help of clues.Across1.Substance used as synthetic wool (7)2.A plastic used for making containers and carry bags (9)3.Substance made up of large number of smaller molecules (7)4.Another name for this compound is artificial silk (5)Down5.A type of fibre obtained naturally from cocoon (4)6.A synthetic fibre classified as polyester (8)7.A polymer used for making rope (5)
Answer» Question 29 Complete the crossword given below with the help of clues. Across 1.Substance used as synthetic wool (7) 2.A plastic used for making containers and carry bags (9) 3.Substance made up of large number of smaller molecules (7) 4.Another name for this compound is artificial silk (5) Down 5.A type of fibre obtained naturally from cocoon (4) 6.A synthetic fibre classified as polyester (8) 7.A polymer used for making rope (5)

4168.

Question 29Complete the crossword given below with the help of clues.Across1.Substance used as synthetic wool (7)2.A plastic used for making containers and carry bags (9)3.Substance made up of large number of smaller molecules (7)4.Another name for this compound is artificial silk (5)Down5.A type of fibre obtained naturally from cocoon (4)6.A synthetic fibre classified as polyester (8)7.A polymer used for making rope (5)

Answer» Question 29

Complete the crossword given below with the help of clues.

Across

1.Substance used as synthetic wool (7)

2.A plastic used for making containers and carry bags (9)

3.Substance made up of large number of smaller molecules (7)

4.Another name for this compound is artificial silk (5)

Down

5.A type of fibre obtained naturally from cocoon (4)

6.A synthetic fibre classified as polyester (8)

7.A polymer used for making rope (5)

Discussion

4169.	DOES BIOT SAVIOR LAW DEPENDS ON THE MEDIUM
Answer» DOES BIOT SAVIOR LAW DEPENDS ON THE MEDIUM

Discussion

4170.	hybridisation of B2H6?
Answer» hybridisation of B2H6?

Discussion

4171.	why does ice float on wate
Answer» why does ice float on wate

Discussion

4172.	Is there any difference between between atomic mass of hydrogen to its actual mass??
Answer» Is there any difference between between atomic mass of hydrogen to its actual mass??

Discussion

4173.	If total number of electrons in an atom are 8 then set of quantum numbers will be.
Answer» If total number of electrons in an atom are 8 then set of quantum numbers will be.

Discussion

4174.	Do exceptions are metalloids ?
Answer» Do exceptions are metalloids ?

Discussion

4175.	Which among the following non-metal combines with sodium to form common salt?
Answer» Which among the following non-metal combines with sodium to form common salt?

Discussion

4176.	Which of the following metal exist in the liquid state at room temperature ? (a) magnesium (b) manganese (c) mercury (d) sodium
Answer» Which of the following metal exist in the liquid state at room temperature ? (a) magnesium (b) manganese (c) mercury (d) sodium

4176.

Which of the following metal exist in the liquid state at room temperature ? (a) magnesium (b) manganese (c) mercury (d) sodium

Answer»

Which of the following metal exist in the liquid state at room temperature ?

(a) magnesium

(b) manganese

(c) mercury

(d) sodium

Discussion

4177.	what will be the bond angle C-O-H in alcohol if C and O atom possess sp3 hybridisation (a)109^°28' (b)111^°42' (c)109^° (d)108^°30'
Answer» what will be the bond angle C-O-H in alcohol if C and O atom possess sp3 hybridisation (a)109^°28' (b)111^°42' (c)109^° (d)108^°30'

Discussion

4178.	Clear, transparent water is always fit for drinking. Comment.
Answer» Clear, transparent water is always fit for drinking. Comment.

Discussion

4179.	Are all combination reactions redox? Can oxidation occur without reduction? Are all chemical reactions involving a difference in the electronegativity of the molecules or atoms always a redox reaction? If there is an exchange of electrons will it always be redox reaction?
Answer» Are all combination reactions redox? Can oxidation occur without reduction? Are all chemical reactions involving a difference in the electronegativity of the molecules or atoms always a redox reaction? If there is an exchange of electrons will it always be redox reaction?

Discussion

4180.	why is effective number of particles in body centred ionic solid 1\lbrack one\rbrack?
Answer» why is effective number of particles in body centred ionic solid 1\lbrack one\rbrack?

Discussion

4181.	What is the permanent hardness of water? How can it be removed?
Answer» What is the permanent hardness of water? How can it be removed?

Discussion

4182.	An element X reacts with water to form a solution which turns phenolphthalein indicator pink.The element X is most likely to be: (a) sulphur (b) sodium (c) carbon (d) silicon
Answer» An element X reacts with water to form a solution which turns phenolphthalein indicator pink.The element X is most likely to be: (a) sulphur (b) sodium (c) carbon (d) silicon

4182.

An element X reacts with water to form a solution which turns phenolphthalein indicator pink.The element X is most likely to be: (a) sulphur (b) sodium (c) carbon (d) silicon

Answer»

An element X reacts with water to form a solution which turns phenolphthalein indicator pink.The element X is most likely to be:

(a) sulphur

(b) sodium

(c) carbon

(d) silicon

Discussion

4183.	Question 9 (a)What happens whenDilute sulphuric acid is poured on a copper plate?Write word equations of the reactions involved.
Answer» Question 9 (a) What happens when Dilute sulphuric acid is poured on a copper plate? Write word equations of the reactions involved.

Discussion

4184.	Heating coal in the absence of air is called
Answer» Heating coal in the absence of air is called

Discussion

4185.	Discuss the observations that helped E. Rutherford conclude the concept of a concentrated nucleus.
Answer» Discuss the observations that helped E. Rutherford conclude the concept of a concentrated nucleus.

Discussion

4186.	Write the chemical formula for the following compounds a) Aluminium sulphate b) Silver nitrate c) Magnesium oxide d) Barium chloride
Answer» Write the chemical formula for the following compounds a) Aluminium sulphate b) Silver nitrate c) Magnesium oxide d) Barium chloride

4186.

Write the chemical formula for the following compounds a) Aluminium sulphate b) Silver nitrate c) Magnesium oxide d) Barium chloride

Answer»

Write the chemical formula for the following compounds

a) Aluminium sulphate

b) Silver nitrate

c) Magnesium oxide

d) Barium chloride

Discussion

4187.	Identify the properties of the metals from the uses mentioned in the table given below.UsesPropertyUsed to make foils to wrap foodXUsed to make electric wiresYUsed to make ornamentsZ
Answer» Identify the properties of the metals from the uses mentioned in the table given below. $\begin{matrix} Uses & Property Used to make foils to wrap food & X Used to make electric wires & Y Used to make ornaments & Z \end{matrix}$

Discussion

4188.	Why inert gases do not form compounds?
Answer» Why inert gases do not form compounds?

Discussion

4189.	4.In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate ,a yellow ppt of lead iodide is formed . while performing the activity of lead nitrate is not available which can be used in place of lead nitrate ?
Answer» 4.In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate ,a yellow ppt of lead iodide is formed . while performing the activity of lead nitrate is not available which can be used in place of lead nitrate ?

Discussion

4190.	The chemical formula of ammonium nitrate is _________.
Answer» The chemical formula of ammonium nitrate is _________.

Discussion

4191.	Which of the following can be classified into physical and chemical change? Also mention whether it's a reversible or irreversible change Melting of chocolate Rusting of iron Baking of pizza Cutting of vegetables Digestion of food
Answer» Which of the following can be classified into physical and chemical change? Also mention whether it's a reversible or irreversible change Melting of chocolate Rusting of iron Baking of pizza Cutting of vegetables Digestion of food

4191.

Which of the following can be classified into physical and chemical change? Also mention whether it's a reversible or irreversible change Melting of chocolate Rusting of iron Baking of pizza Cutting of vegetables Digestion of food

Answer»

Which of the following can be classified into physical and chemical change? Also mention whether it's a reversible or irreversible change

Melting of chocolate

Rusting of iron

Baking of pizza

Cutting of vegetables

Digestion of food

Discussion

4192.	uranium 238 nucleus initially at rest emits an Alpha particle with energy E the recoil speed of residual nucleus thorium 234 is
Answer» uranium 238 nucleus initially at rest emits an Alpha particle with energy E the recoil speed of residual nucleus thorium 234 is

Discussion

4193.	What is the best method to avoid pollution, if you are using plastic bags?
Answer» What is the best method to avoid pollution, if you are using plastic bags?

Discussion

4194.	Alex is confused between two shirts for his bonfire party. One is made up of cotton fibre and the other is made up of polyester fibre. Which one should he prefer to wear and why?
Answer» Alex is confused between two shirts for his bonfire party. One is made up of cotton fibre and the other is made up of polyester fibre. Which one should he prefer to wear and why?

Discussion

4195.	A positron has equal charge of electron but opposite polarity. If 1 million positrons flow from positive to negative and and same amount of electron flows from negative to positive and in a span of 16 microsecond. What is electric current associated in this process.
Answer» A positron has equal charge of electron but opposite polarity. If 1 million positrons flow from positive to negative and and same amount of electron flows from negative to positive and in a span of 16 microsecond. What is electric current associated in this process.

Discussion

4196.	The number of particles present in 1 mole of nitrogen atom are?
Answer» The number of particles present in 1 mole of nitrogen atom are?

Discussion

4197.	Which of the following was not an observation made during alpha particle scattering experiment?
Answer» Which of the following was not an observation made during alpha particle scattering experiment?

Discussion

4198.	find the maximum number of +1/2 spin electron in a electronic configuration of Mn? (1) 15 (2) 13 (3) 10 (4) 5
Answer» find the maximum number of +1/2 spin electron in a electronic configuration of Mn? (1) 15 (2) 13 (3) 10 (4) 5

Discussion

4199.	Why do some fuels burn with orange flame
Answer» Why do some fuels burn with orange flame

Discussion

4200.	Everything is made of atoms and every atom has a nucleus composed of positively charged particles called protons, with some neutrally charged particles known as neutrons. The particles that orbit around the nucleus that is negatively charged are known as________.
Answer» Everything is made of atoms and every atom has a nucleus composed of positively charged particles called protons, with some neutrally charged particles known as neutrons. The particles that orbit around the nucleus that is negatively charged are known as________.

Discussion

Explore topic-wise InterviewSolutions in .

What is the relative molecular mass of cane sugar?

Why we write Hcl as 2HCL in the equation?? And others also like 2AL at the place of AL

The elements present in mercuric oxide are:

Why is air called homogeneous mixture?

The hydrogen bond is shortest in

Define the following terms : (a) Atomic number (b) Mass number (c) Nucleons (d) Valence shell

Answer the following questions.(a) What is meant by allotrope? Which are the allotropes of carbon?(b) How is carbon dioxide gas produced in the laboratory?(c) Why is graphite used as a lubricant?(d) How is charcoal made?

Generally, non metals are not lustrous. Which of the following non-metal is lustrous?

How mass of proton is 9 times the mass of Be+3

When metals like Na, K, Ca react with acids like HCL , Hydrogen gas is evolved. Explain why no evolution of hydrogen gas takes place when the same metals react with HNO3.

Which petroleum product is used in place of coal tar for metalling the roads?

Explain how anode rays are produced in a discharge tube.

What would you observe on adding dilute hydrochloric acid to(i) sodium bicarbonate placed in a test tube?(ii) zinc metal in a test tube?

what is polymer and monomer?

What is dimentional formula of resi†an ce× conduc†an ce

Name the major constituent of Acid rain.

Ratio of number of atoms present in 50g of CaCO3 and 60 g of SO3 is. 1) 5 : 6. 2) 1: 1. 3) 3 : 5 4) 2 : 5

DOES BIOT SAVIOR LAW DEPENDS ON THE MEDIUM

hybridisation of B2H6?

why does ice float on wate

Is there any difference between between atomic mass of hydrogen to its actual mass??

If total number of electrons in an atom are 8 then set of quantum numbers will be.

Do exceptions are metalloids ?

Which among the following non-metal combines with sodium to form common salt?

Which of the following metal exist in the liquid state at room temperature ? (a) magnesium (b) manganese (c) mercury (d) sodium

what will be the bond angle C-O-H in alcohol if C and O atom possess sp3 hybridisation (a)109^°28' (b)111^°42' (c)109^° (d)108^°30'

Clear, transparent water is always fit for drinking. Comment.

Are all combination reactions redox? Can oxidation occur without reduction? Are all chemical reactions involving a difference in the electronegativity of the molecules or atoms always a redox reaction? If there is an exchange of electrons will it always be redox reaction?

why is effective number of particles in body centred ionic solid 1\lbrack one\rbrack?

What is the permanent hardness of water? How can it be removed?

An element X reacts with water to form a solution which turns phenolphthalein indicator pink.The element X is most likely to be: (a) sulphur (b) sodium (c) carbon (d) silicon

Question 9 (a)What happens whenDilute sulphuric acid is poured on a copper plate?Write word equations of the reactions involved.

Heating coal in the absence of air is called

Discuss the observations that helped E. Rutherford conclude the concept of a concentrated nucleus.

Write the chemical formula for the following compounds a) Aluminium sulphate b) Silver nitrate c) Magnesium oxide d) Barium chloride

Identify the properties of the metals from the uses mentioned in the table given below.UsesPropertyUsed to make foils to wrap foodXUsed to make electric wiresYUsed to make ornamentsZ

Why inert gases do not form compounds?

4.In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate ,a yellow ppt of lead iodide is formed . while performing the activity of lead nitrate is not available which can be used in place of lead nitrate ?

The chemical formula of ammonium nitrate is _________.

Which of the following can be classified into physical and chemical change? Also mention whether it's a reversible or irreversible change Melting of chocolate Rusting of iron Baking of pizza Cutting of vegetables Digestion of food

uranium 238 nucleus initially at rest emits an Alpha particle with energy E the recoil speed of residual nucleus thorium 234 is

What is the best method to avoid pollution, if you are using plastic bags?

Alex is confused between two shirts for his bonfire party. One is made up of cotton fibre and the other is made up of polyester fibre. Which one should he prefer to wear and why?

A positron has equal charge of electron but opposite polarity. If 1 million positrons flow from positive to negative and and same amount of electron flows from negative to positive and in a span of 16 microsecond. What is electric current associated in this process.

The number of particles present in 1 mole of nitrogen atom are?

Which of the following was not an observation made during alpha particle scattering experiment?

find the maximum number of +1/2 spin electron in a electronic configuration of Mn? (1) 15 (2) 13 (3) 10 (4) 5

Why do some fuels burn with orange flame

Everything is made of atoms and every atom has a nucleus composed of positively charged particles called protons, with some neutrally charged particles known as neutrons. The particles that orbit around the nucleus that is negatively charged are known as________.