10223 + Interview Questions in Chemistry Page 145 InterviewSolution

7201.	Calculate the mass of a sample of iron metal that would contain 0.250 moles of iron atoms
Answer» Calculate the mass of a sample of iron metal that would contain 0.250 moles of iron atoms

Discussion

7202.	Molar mass of nitrogen is 14u .What will be the mass of one atom of nitrogen in grams.?
Answer» Molar mass of nitrogen is 14u .What will be the mass of one atom of nitrogen in grams.?

Discussion

7203.	Water contains-
Answer» Water contains-

Discussion

7204.	The anomalies of isotopes were solved in the modern periodic table because it is based on the atomic number but it also created a problem of isobars which have same atomic mass but a different atomic number, so how can it be said that it mended all the anomalies?
Answer» The anomalies of isotopes were solved in the modern periodic table because it is based on the atomic number but it also created a problem of isobars which have same atomic mass but a different atomic number, so how can it be said that it mended all the anomalies?

Discussion

7205.	How many electrons are present in the M shell of an atom of an element with atomic number 24? Please explain how to find.
Answer» How many electrons are present in the M shell of an atom of an element with atomic number 24? Please explain how to find.

7205.

How many electrons are present in the M shell of an atom of an element with atomic number 24? Please explain how to find.

Answer»

How many electrons are present in the M shell of an atom of an element with atomic number 24?

Please explain how to find.

Discussion

7206.	Why are cooking utensils and water boiler are made up of Copper and Aluminium metal?
Answer» Why are cooking utensils and water boiler are made up of Copper and Aluminium metal?

Discussion

7207.	A certain weight of pure CaCO3is made to react completely with 200 mL of an HCl solution to give 224 mL of CO2gas at STP. The normality of the HCl is
Answer» A certain weight of pure CaC $O_{3}$ is made to react completely with 200 mL of an HCl solution to give 224 mL of C $O_{2}$ gas at STP. The normality of the HCl is

Discussion

7208.	Why iron has two valencies?
Answer» Why iron has two valencies?

Discussion

7209.	Calculate the mole ratio of 240g of calcium and 240g of magnesium
Answer» Calculate the mole ratio of 240g of calcium and 240g of magnesium

Discussion

7210.	The molecules in matter have attraction between them. But gases do not have molecular attraction. Then, how is gas consider as a matter?
Answer» The molecules in matter have attraction between them. But gases do not have molecular attraction. Then, how is gas consider as a matter?

Discussion

7211.	What will be the net charge on the atom if it contains one electron and one proton?
Answer» What will be the net charge on the atom if it contains one electron and one proton?

Discussion

7212.	During sublimation of ammonium chloride, pure ammonium chloride gets:
Answer» During sublimation of ammonium chloride, pure ammonium chloride gets:

Discussion

7213.	Amongst the following molecules, the one with the highest bond multiplicity is:
Answer» Amongst the following molecules, the one with the highest bond multiplicity is:

Discussion

7214.	The ion of an element has 3 positive charges. The mass number of atom of this element is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
Answer» The ion of an element has 3 positive charges. The mass number of atom of this element is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

Discussion

7215.	Samples of the gasesO2,N2,CO2 and CO under the same condition of temperature and pressure contain the same number of molecules x. The molecules of oxygen occupy V litres and have a mass of 8 g under the same what is the volume occupied by (a) x molecules ofN2 (b) 3x molecules of CO, (c) What is the mass of CO2 in grams? (d) In answering the above questions, which law have used?
Answer» Samples of the gases $O_{2}, N_{2}, C O_{2}$ and CO under the same condition of temperature and pressure contain the same number of molecules x. The molecules of oxygen occupy V litres and have a mass of 8 g under the same what is the volume occupied by (a) x molecules of $N_{2}$ (b) 3x molecules of CO, (c) What is the mass of $C O_{2}$ in grams? (d) In answering the above questions, which law have used?

Discussion

7216.	How many atoms are there in sulphate ion?
Answer» How many atoms are there in sulphate ion?

Discussion

7217.	Q15. Consider the following statements with respect to Coalbed Methane: 1. It is a sweet gas. 2. It is one of the cleanest burning fossil fuels. Which of the above statement/s is/are correct?
Answer» Q15. Consider the following statements with respect to Coalbed Methane: 1. It is a sweet gas. 2. It is one of the cleanest burning fossil fuels. Which of the above statement/s is/are correct?

7217.

Q15. Consider the following statements with respect to Coalbed Methane: 1. It is a sweet gas. 2. It is one of the cleanest burning fossil fuels. Which of the above statement/s is/are correct?

Answer»

Q15. Consider the following statements with respect to Coalbed Methane:

1. It is a sweet gas.

2. It is one of the cleanest burning fossil fuels.

Which of the above statement/s is/are correct?

Discussion

7218.	State an advantage of CNG (Compressed Natural Gas).
Answer» State an advantage of CNG (Compressed Natural Gas).

Discussion

7219.	Give scientific reasons 1) Steam produces severe burns than boiling water
Answer» Give scientific reasons 1) Steam produces severe burns than boiling water

7219.

Give scientific reasons 1) Steam produces severe burns than boiling water

Answer»

Give scientific reasons

1) Steam produces severe burns than boiling water

Discussion

7220.	The charge to mass ratio for the particles of the cathode rays obtained from different gases was found to be the same while the charge to mass ratio for the particle. Of the anode ray obtained from different gases was found to be different.why?
Answer» The charge to mass ratio for the particles of the cathode rays obtained from different gases was found to be the same while the charge to mass ratio for the particle. Of the anode ray obtained from different gases was found to be different.why?

Discussion

7221.	Among the following species, the isostructural pairs are NF3, NO3−, BF3, H3O+, HN3
Answer» Among the following species, the isostructural pairs are $N F_{3}$ , ${N O_{3}}^{-}$ , $B F_{3}$ , ${H_{3} O}^{+}$ , $H N_{3}$

Discussion

7222.	Sir can you tell me why do we need to study all structures even though they are wrong why we don't directly read the correct one???
Answer» Sir can you tell me why do we need to study all structures even though they are wrong why we don't directly read the correct one???

Discussion

7223.	What causes the polarity in nitric acid?
Answer» What causes the polarity in nitric acid?

Discussion

7224.	When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime, the whole water turns pink. This is due to:
Answer» When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime, the whole water turns pink. This is due to:

Discussion

7225.	Amongst all, which of the following is a non-metal. {The letters do not represent the symbols of the elements}
Answer» Amongst all, which of the following is a non-metal. {The letters do not represent the symbols of the elements}

Discussion

7226.	Statements All holders are chocolates. No chocolate is a lamp. Some lamps are desks. All desks are pens. Conclusions I.Some pens are chocolates. II.Some desks are lamps. III.No pen is a chocolate. IV.Some pens are holders.
Answer» Statements All holders are chocolates. No chocolate is a lamp. Some lamps are desks. All desks are pens. Conclusions I.Some pens are chocolates. II.Some desks are lamps. III.No pen is a chocolate. IV.Some pens are holders.

7226.

Statements All holders are chocolates. No chocolate is a lamp. Some lamps are desks. All desks are pens. Conclusions I.Some pens are chocolates. II.Some desks are lamps. III.No pen is a chocolate. IV.Some pens are holders.

Answer»

Statements

All holders are chocolates.

No chocolate is a lamp.

Some lamps are desks.

All desks are pens.

Conclusions

I.Some pens are chocolates.

II.Some desks are lamps.

III.No pen is a chocolate.

IV.Some pens are holders.

Discussion

7227.	Question 35 Iron fillings and sulphur were mixed together and divided into two parts, 'A' and 'B'. Part 'A' was heated strongly while part 'B' was not heated. Dilute hydrochloric acid was added to both the parts and evolution of gas were seen in both the cases. How will you identify the gases evolved?
Answer» Question 35 Iron fillings and sulphur were mixed together and divided into two parts, 'A' and 'B'. Part 'A' was heated strongly while part 'B' was not heated. Dilute hydrochloric acid was added to both the parts and evolution of gas were seen in both the cases. How will you identify the gases evolved?

Discussion

7228.	Sodium and potassium form oxides
Answer» Sodium and potassium form oxides

Discussion

7229.	Equal weights of methane and oxygen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by oxygen is (IIT-JEE, 1981)
Answer» Equal weights of methane and oxygen are mixed in an empty container at $25^{o} C .$ The fraction of the total pressure exerted by oxygen is (IIT-JEE, 1981)

Discussion

7230.	The mass of a molecule of water is
Answer» The mass of a molecule of water is

Discussion

7231.	According to scientist Dalton, the element that has the following symbol for representation is ___ .
Answer» According to scientist Dalton, the element that has the following symbol for representation is ___ .

7231.

According to scientist Dalton, the element that has the following symbol for representation is ___ .

Answer»

According to scientist Dalton, the element that has the following symbol for representation is ___ .

Discussion

7232.	Bohr's atomic theory gave the idea of:
Answer» Bohr's atomic theory gave the idea of:

Discussion

7233.	Depending on the type of solvent, how are solutions classified?
Answer» Depending on the type of solvent, how are solutions classified?

Discussion

7234.	Question 4 (d) Draw the structure of the compound Hexanal.
Answer» Question 4 (d) Draw the structure of the compound Hexanal.

Discussion

7235.	Question 43 A sample of ethane (C2H6) gas has the same mass as 1.5×1020 molecules of methane (CH4). How many C2H6 molecules does the sample of gas contain?
Answer» Question 43 A sample of ethane $(C_{2} H_{6})$ gas has the same mass as $1.5 \times 10^{20}$ molecules of methane $(C H_{4})$ . How many $C_{2} H_{6}$ molecules does the sample of gas contain?

Discussion

7236.	Permutit is the name given to:
Answer» Permutit is the name given to:

Discussion

7237.	Why does bursting a ballon creates a sound???
Answer» Why does bursting a ballon creates a sound???

Discussion

7238.	Is wood is a heterogeneous mixture? Why?
Answer» Is wood is a heterogeneous mixture? Why?

Discussion

7239.	What is the principle behind the process of centrifugation?
Answer» What is the principle behind the process of centrifugation?

Discussion

7240.	Combustion is-
Answer» Combustion is-

Discussion

7241.	Which of the following is also known as aqua fortis?
Answer» Which of the following is also known as aqua fortis?

Discussion

7242.	Why is potassium permanganate a true solution?
Answer» Why is potassium permanganate a true solution?

Discussion

7243.	A solid object like a rock is almost entirely filled with empty space and only feels solid due to electrical repulsion force . Is this statement true or false.
Answer» A solid object like a rock is almost entirely filled with empty space and only feels solid due to electrical repulsion force . Is this statement true or false.

Discussion

7244.	Why does our palm feel cold when we put some acetone, petrol or perfume on it?
Answer» Why does our palm feel cold when we put some acetone, petrol or perfume on it?

Discussion

7245.	What is the physical state of matter at 100°C . State the reason. Is it water or water vapour????
Answer» What is the physical state of matter at 100°C . State the reason. Is it water or water vapour????

7245.

What is the physical state of matter at 100°C . State the reason. Is it water or water vapour????

Answer»

What is the physical state of matter at 100°C . State the reason.

Is it water or water vapour????

Discussion

7246.	Can you please provide question paper of JEE with solutions. ( 2018)
Answer» Can you please provide question paper of JEE with solutions. ( 2018)

Discussion

7247.	The height and radius of the coke tin is 14 cm and 5 cm respectively. How many litres of coke is present in the tin? (π=227) [1 MARK]
Answer» The height and radius of the coke tin is 14 cm and 5 cm respectively. How many litres of coke is present in the tin? $(π = \frac{22}{7})$ [1 MARK]

Discussion

7248.	How do fish survive in frozen water
Answer» How do fish survive in frozen water

Discussion

7249.	State the chemical symbols for the following elements: Sodium, Potassium, Iron, Copper, Mercury, Silver.
Answer» State the chemical symbols for the following elements: Sodium, Potassium, Iron, Copper, Mercury, Silver.

7249.

State the chemical symbols for the following elements: Sodium, Potassium, Iron, Copper, Mercury, Silver.

Answer»

State the chemical symbols for the following elements:

Sodium, Potassium, Iron, Copper, Mercury, Silver.

Discussion

7250.	Four moles of O2 are mixed with two moles of Helium. What will be the ratio of specific heats of constant pressure and constant volume for the mixture?
Answer» Four moles of O₂ are mixed with two moles of Helium. What will be the ratio of specific heats of constant pressure and constant volume for the mixture?

Discussion

Explore topic-wise InterviewSolutions in .

Calculate the mass of a sample of iron metal that would contain 0.250 moles of iron atoms

Molar mass of nitrogen is 14u .What will be the mass of one atom of nitrogen in grams.?

Water contains-

The anomalies of isotopes were solved in the modern periodic table because it is based on the atomic number but it also created a problem of isobars which have same atomic mass but a different atomic number, so how can it be said that it mended all the anomalies?

How many electrons are present in the M shell of an atom of an element with atomic number 24? Please explain how to find.

Why are cooking utensils and water boiler are made up of Copper and Aluminium metal?

A certain weight of pure CaCO3is made to react completely with 200 mL of an HCl solution to give 224 mL of CO2gas at STP. The normality of the HCl is

Why iron has two valencies?

Calculate the mole ratio of 240g of calcium and 240g of magnesium

The molecules in matter have attraction between them. But gases do not have molecular attraction. Then, how is gas consider as a matter?

What will be the net charge on the atom if it contains one electron and one proton?

During sublimation of ammonium chloride, pure ammonium chloride gets:

Amongst the following molecules, the one with the highest bond multiplicity is:

The ion of an element has 3 positive charges. The mass number of atom of this element is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

How many atoms are there in sulphate ion?

Q15. Consider the following statements with respect to Coalbed Methane: 1. It is a sweet gas. 2. It is one of the cleanest burning fossil fuels. Which of the above statement/s is/are correct?

State an advantage of CNG (Compressed Natural Gas).

Give scientific reasons 1) Steam produces severe burns than boiling water

The charge to mass ratio for the particles of the cathode rays obtained from different gases was found to be the same while the charge to mass ratio for the particle. Of the anode ray obtained from different gases was found to be different.why?

Among the following species, the isostructural pairs are NF3, NO3−, BF3, H3O+, HN3

Sir can you tell me why do we need to study all structures even though they are wrong why we don't directly read the correct one???

What causes the polarity in nitric acid?

When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime, the whole water turns pink. This is due to:

Amongst all, which of the following is a non-metal. {The letters do not represent the symbols of the elements}

Statements All holders are chocolates. No chocolate is a lamp. Some lamps are desks. All desks are pens. Conclusions I.Some pens are chocolates. II.Some desks are lamps. III.No pen is a chocolate. IV.Some pens are holders.

Sodium and potassium form oxides

Equal weights of methane and oxygen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by oxygen is (IIT-JEE, 1981)

The mass of a molecule of water is

According to scientist Dalton, the element that has the following symbol for representation is ___ .

Bohr's atomic theory gave the idea of:

Depending on the type of solvent, how are solutions classified?

Question 4 (d) Draw the structure of the compound Hexanal.

Question 43 A sample of ethane (C2H6) gas has the same mass as 1.5×1020 molecules of methane (CH4). How many C2H6 molecules does the sample of gas contain?

Permutit is the name given to:

Why does bursting a ballon creates a sound???

Is wood is a heterogeneous mixture? Why?

What is the principle behind the process of centrifugation?

Combustion is-

Which of the following is also known as aqua fortis?

Why is potassium permanganate a true solution?

A solid object like a rock is almost entirely filled with empty space and only feels solid due to electrical repulsion force . Is this statement true or false.

Why does our palm feel cold when we put some acetone, petrol or perfume on it?

What is the physical state of matter at 100°C . State the reason. Is it water or water vapour????

Can you please provide question paper of JEE with solutions. ( 2018)

The height and radius of the coke tin is 14 cm and 5 cm respectively. How many litres of coke is present in the tin? (π=227) [1 MARK]

How do fish survive in frozen water

State the chemical symbols for the following elements: Sodium, Potassium, Iron, Copper, Mercury, Silver.

Four moles of O2 are mixed with two moles of Helium. What will be the ratio of specific heats of constant pressure and constant volume for the mixture?