10223 + Interview Questions in Chemistry Page 181 InterviewSolution

9001.	The combination of tropospheric ozone, smoke, and fog produces ___.
Answer» The combination of tropospheric ozone, smoke, and fog produces ___.

Discussion

9002.	Q-(I) Find the weight of 410(26) molecule of NH3 (26 in exponent and 3 in NH at base) (II) If the weight of 1 atom of an element 'x'is 1.5710(-24) gram. Find the no. Of moles in 40kg of it? (-24is an exponent)
Answer» Q-(I) Find the weight of 410(26) molecule of NH3 (26 in exponent and 3 in NH at base) (II) If the weight of 1 atom of an element 'x'is 1.5710(-24) gram. Find the no. Of moles in 40kg of it? (-24is an exponent)

Discussion

9003.	In the videos you decribrd tempature to actually be just he kinetic motion of the particles but,when the fusion takes place [at the periods where the teparature remains constant], we learnt that the energy is used to overcome the intermolecular bonds so when these bonds are being overcome sholdn't the kinetic energy also increase in turn causing the temparutare to also increse.
Answer» In the videos you decribrd tempature to actually be just he kinetic motion of the particles but,when the fusion takes place [at the periods where the teparature remains constant], we learnt that the energy is used to overcome the intermolecular bonds so when these bonds are being overcome sholdn't the kinetic energy also increase in turn causing the temparutare to also increse.

Discussion

9004.	The chemical formula of calcium nitrate is _______ .
Answer» The chemical formula of calcium nitrate is _______ .

Discussion

9005.	When we are in a very cold place, we see cold air coming out of our mouth. But my doubt is, when the surrounding is so cold, why is the air not in solid or atleast at liquid state?
Answer» When we are in a very cold place, we see cold air coming out of our mouth. But my doubt is, when the surrounding is so cold, why is the air not in solid or atleast at liquid state?

Discussion

9006.	Give the postulates of Bohr's atomic model.
Answer» Give the postulates of Bohr's atomic model.

Discussion

9007.	Statement 1: Volatile component is responsible for the production of flame. Statement 2: Gases burn to produce flame.
Answer» Statement 1: Volatile component is responsible for the production of flame. Statement 2: Gases burn to produce flame.

Discussion

9008.	What is meant by the symbol of an element? Explain with examples.
Answer» What is meant by the symbol of an element? Explain with examples.

Discussion

9009.	Define solids, liquids, and gases.
Answer» Define solids, liquids, and gases.

Discussion

9010.	The branch of biology that deals with identification and classification of organisms is
Answer» The branch of biology that deals with identification and classification of organisms is

Discussion

9011.	Explain quantum theory?
Answer» Explain quantum theory?

Discussion

9012.	In the reaction 2FeCl2+Cl2→2FeCl3, Chlorine may be regarded as:
Answer» In the reaction $2 F e C l_{2} + C l_{2} \to 2 F e C l_{3}$ , Chlorine may be regarded as:

Discussion

9013.	The name for hydrogen comes from the word meaning -
Answer» The name for hydrogen comes from the word meaning -

Discussion

9014.	What is the electronic configuration and valency of Sulphur respectively?
Answer» What is the electronic configuration and valency of Sulphur respectively?

Discussion

9015.	Q. Why air is not a Homogeneous Mixture , As it is evenly distributed through out the Atmosphere . Where as ICE is said as Homogeneous , but ICE has molecules as well as Chemical Combination . It cant be Categorized in the Group Of Mixtures ( as a Homogeneous ) ?
Answer» Q. Why air is not a Homogeneous Mixture , As it is evenly distributed through out the Atmosphere . Where as ICE is said as Homogeneous , but ICE has molecules as well as Chemical Combination . It cant be Categorized in the Group Of Mixtures ( as a Homogeneous ) ?

Discussion

9016.	The constituents of the nucleus are held together by?
Answer» The constituents of the nucleus are held together by?

Discussion

9017.	What is the nature of the bond in common salt?
Answer» What is the nature of the bond in common salt?

Discussion

9018.	Which of the following is the most abundant gas in the earth’s atmosphere?
Answer» Which of the following is the most abundant gas in the earth’s atmosphere?

Discussion

9019.	One of the following liquids will leave behind a residue on heating. This one is : (a) brine (b) bromine (c) mercury (d) alcohol
Answer» One of the following liquids will leave behind a residue on heating. This one is : (a) brine (b) bromine (c) mercury (d) alcohol

9019.

One of the following liquids will leave behind a residue on heating. This one is : (a) brine (b) bromine (c) mercury (d) alcohol

Answer»

One of the following liquids will leave behind a residue on heating. This one is :

(a) brine (b) bromine (c) mercury (d) alcohol

Discussion

9020.	Give reason why: (a) Copper metal is used for making electric wires. (b) Graphite is used for making the electrode in a dry cell.
Answer» Give reason why: (a) Copper metal is used for making electric wires. (b) Graphite is used for making the electrode in a dry cell.

9020.

Give reason why: (a) Copper metal is used for making electric wires. (b) Graphite is used for making the electrode in a dry cell.

Answer»

Give reason why:

(a) Copper metal is used for making electric wires.

(b) Graphite is used for making the electrode in a dry cell.

Discussion

9021.	What is transpiration?
Answer» What is transpiration?

Discussion

9022.	If N1,N2,N3,...... are the number of molecules with molecular masses M1,M2,M3,...... respectively, the mass average molecular mass is expressed as?
Answer» If $N_{1}, N_{2}, N_{3}, . . . . . .$ are the number of molecules with molecular masses $M_{1}, M_{2}, M_{3}, . . . . . .$ respectively, the mass average molecular mass is expressed as?

Discussion

9023.	Name the structure of silicates in which three oxygen atoms of [SiO4]− are shared:
Answer» Name the structure of silicates in which three oxygen atoms of $[S i O_{4}]^{-}$ are shared:

Discussion

9024.	Which element can be placed in the region marked by question mark?
Answer» Which element can be placed in the region marked by question mark?

Discussion

9025.	According to Bohr's the third shell of atom contain 18 electron but in the whole chapter it is said that second and the above cell have only 8 electron capability.
Answer» According to Bohr's the third shell of atom contain 18 electron but in the whole chapter it is said that second and the above cell have only 8 electron capability.

Discussion

9026.	What is/are the conclusions from Rutherford's α - particle scattering experiment?
Answer» What is/are the conclusions from Rutherford's $α$ - particle scattering experiment?

Discussion

9027.	Brass is a mixture of ______.
Answer» Brass is a mixture of ______.

Discussion

9028.	How does obleek work?
Answer» How does obleek work?

Discussion

9029.	What are the chemical properties of metals?
Answer» What are the chemical properties of metals?

Discussion

9030.	What is enthalpy and change in enthalpy (ΔH)?
Answer» What is enthalpy and change in enthalpy (ΔH)?

Discussion

9031.	Why does solubility of gas in a liquid dcreases when value of henry's constant increases ??
Answer» Why does solubility of gas in a liquid dcreases when value of henry's constant increases ??

9031.

Why does solubility of gas in a liquid dcreases when value of henry's constant increases ??

Answer»

Why does solubility of gas in a liquid dcreases when value of henry's constant increases

??

Discussion

9032.	what is sol
Answer» what is sol

Discussion

9033.	Why it is advisable to use pressure cooker at high altitude?
Answer» Why it is advisable to use pressure cooker at high altitude?

Discussion

9034.	Water contains two components but still it is a pure substance give two reasons
Answer» Water contains two components but still it is a pure substance give two reasons

Discussion

9035.	Find the mass of 29.12 L of SO3 gas at STP.
Answer» Find the mass of $29.12 L$ of $S O_{3}$ gas at STP.

Discussion

9036.	What Na2CO3 denotes?
Answer» What $N a_{2} C O_{3}$ denotes?

Discussion

9037.	What are the constituents particles of ink?
Answer» What are the constituents particles of ink?

Discussion

9038.	In the dichromate dianion
Answer» In the dichromate dianion

9038.

In the dichromate dianion

Answer»

In the dichromate dianion

Discussion

9039.	Redox reactions include :
Answer» Redox reactions include :

Discussion

9040.	The oxidation state of Oxygen in KO2 is
Answer» The oxidation state of Oxygen in $K O_{2}$ is

Discussion

9041.	What is the mass of silver deposited on the passage of 2 A current during the electrolysis of silver? Electrochemical equivalent of silver = 1.18×10−3 gm C−1
Answer» What is the mass of silver deposited on the passage of 2 A current during the electrolysis of silver? Electrochemical equivalent of silver = $1.18 \times 10^{- 3} g m C^{- 1}$

Discussion

9042.	Describe a method to separate a mixture of common salt and sand.
Answer» Describe a method to separate a mixture of common salt and sand.

Discussion

9043.	Name or state the following : (a) An element having valency zero. (b) Metal with valency one. (c) Atoms of the same element differing in mass numbers. (d) Elements having same mass number but different atomic number. (e) Bond formed by transfer of electron(s). (f) Ion formed by gain of electron(s).
Answer» Name or state the following : (a) An element having valency zero. (b) Metal with valency one. (c) Atoms of the same element differing in mass numbers. (d) Elements having same mass number but different atomic number. (e) Bond formed by transfer of electron(s). (f) Ion formed by gain of electron(s).

9043.

Name or state the following : (a) An element having valency zero. (b) Metal with valency one. (c) Atoms of the same element differing in mass numbers. (d) Elements having same mass number but different atomic number. (e) Bond formed by transfer of electron(s). (f) Ion formed by gain of electron(s).

Answer»

Name or state the following :

(a) An element having valency zero.

(b) Metal with valency one.

(c) Atoms of the same element differing in mass numbers.

(d) Elements having same mass number but different atomic number.

(e) Bond formed by transfer of electron(s).

(f) Ion formed by gain of electron(s).

Discussion

9044.	According to the modern revised model of an atom, electrons:
Answer» According to the modern revised model of an atom, electrons:

Discussion

9045.	There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y. (a) What type of substance could X be? Name one substance like X. (b) What type of substance could Y be? Name one substance like Y. (c) What type of substance could Z be? Name one substance like Z. (d) Which process involves absorption or release of an appreciable amount of energy: formation of substances X or formation of substance Z? (e) Name the three groups into which all the substances like Y are divided on the basis of their properties.
Answer» There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y. (a) What type of substance could X be? Name one substance like X. (b) What type of substance could Y be? Name one substance like Y. (c) What type of substance could Z be? Name one substance like Z. (d) Which process involves absorption or release of an appreciable amount of energy: formation of substances X or formation of substance Z? (e) Name the three groups into which all the substances like Y are divided on the basis of their properties.

9045.

There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y. (a) What type of substance could X be? Name one substance like X. (b) What type of substance could Y be? Name one substance like Y. (c) What type of substance could Z be? Name one substance like Z. (d) Which process involves absorption or release of an appreciable amount of energy: formation of substances X or formation of substance Z? (e) Name the three groups into which all the substances like Y are divided on the basis of their properties.

Answer»

There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.

(a) What type of substance could X be? Name one substance like X.

(b) What type of substance could Y be? Name one substance like Y.

(c) What type of substance could Z be? Name one substance like Z.

(d) Which process involves absorption or release of an appreciable amount of energy: formation of substances X or formation of substance Z?

(e) Name the three groups into which all the substances like Y are divided on the basis of their properties.

Discussion

9046.	Which of the following groups follows Dobereiner’s law of triads?
Answer» Which of the following groups follows Dobereiner’s law of triads?

Discussion

9047.	Hardness of H2O is due to
Answer» Hardness of $H_{2} O$ is due to

Discussion

9048.	The mass of CaO that would be obtained by heating 20 kg of 90% pure lime stone is:
Answer» The mass of CaO that would be obtained by heating 20 kg of $90 %$ pure lime stone is:

Discussion

9049.	We should wear cotton clothes in hot summer days to keep cool and comfortable. Why?
Answer» We should wear cotton clothes in hot summer days to keep cool and comfortable. Why?

Discussion

9050.	Pick the incorrect option about ionic bond.
Answer» Pick the incorrect option about ionic bond.

Discussion

Explore topic-wise InterviewSolutions in .

The combination of tropospheric ozone, smoke, and fog produces ___.

Q-(I) Find the weight of 4*10(26) molecule of NH3 (26 in exponent and 3 in NH at base) (II) If the weight of 1 atom of an element 'x'is 1.57*10(-24) gram. Find the no. Of moles in 40kg of it? (-24is an exponent)

The chemical formula of calcium nitrate is _______ .

When we are in a very cold place, we see cold air coming out of our mouth. But my doubt is, when the surrounding is so cold, why is the air not in solid or atleast at liquid state?

Give the postulates of Bohr's atomic model.

Statement 1: Volatile component is responsible for the production of flame. Statement 2: Gases burn to produce flame.

What is meant by the symbol of an element? Explain with examples.

Define solids, liquids, and gases.

The branch of biology that deals with identification and classification of organisms is

Explain quantum theory?

In the reaction 2FeCl2+Cl2→2FeCl3, Chlorine may be regarded as:

The name for hydrogen comes from the word meaning -

What is the electronic configuration and valency of Sulphur respectively?

Q. Why air is not a Homogeneous Mixture , As it is evenly distributed through out the Atmosphere . Where as ICE is said as Homogeneous , but ICE has molecules as well as Chemical Combination . It cant be Categorized in the Group Of Mixtures ( as a Homogeneous ) ?

The constituents of the nucleus are held together by?

What is the nature of the bond in common salt?

Which of the following is the most abundant gas in the earth’s atmosphere?

One of the following liquids will leave behind a residue on heating. This one is : (a) brine (b) bromine (c) mercury (d) alcohol

Give reason why: (a) Copper metal is used for making electric wires. (b) Graphite is used for making the electrode in a dry cell.

What is transpiration?

If N1,N2,N3,...... are the number of molecules with molecular masses M1,M2,M3,...... respectively, the mass average molecular mass is expressed as?

Name the structure of silicates in which three oxygen atoms of [SiO4]− are shared:

Which element can be placed in the region marked by question mark?

According to Bohr's the third shell of atom contain 18 electron but in the whole chapter it is said that second and the above cell have only 8 electron capability.

What is/are the conclusions from Rutherford's α - particle scattering experiment?

Brass is a mixture of ______.

How does obleek work?

What are the chemical properties of metals?

What is enthalpy and change in enthalpy (ΔH)?

Why does solubility of gas in a liquid dcreases when value of henry's constant increases ??

what is sol

Why it is advisable to use pressure cooker at high altitude?

Water contains two components but still it is a pure substance give two reasons

Find the mass of 29.12 L of SO3 gas at STP.

What Na2CO3 denotes?

What are the constituents particles of ink?

In the dichromate dianion

Redox reactions include :

The oxidation state of Oxygen in KO2 is

What is the mass of silver deposited on the passage of 2 A current during the electrolysis of silver? Electrochemical equivalent of silver = 1.18×10−3 gm C−1

Describe a method to separate a mixture of common salt and sand.

Name or state the following : (a) An element having valency zero. (b) Metal with valency one. (c) Atoms of the same element differing in mass numbers. (d) Elements having same mass number but different atomic number. (e) Bond formed by transfer of electron(s). (f) Ion formed by gain of electron(s).

According to the modern revised model of an atom, electrons:

Which of the following groups follows Dobereiner’s law of triads?

Hardness of H2O is due to

The mass of CaO that would be obtained by heating 20 kg of 90% pure lime stone is:

We should wear cotton clothes in hot summer days to keep cool and comfortable. Why?

Pick the incorrect option about ionic bond.

Q-(I) Find the weight of 410(26) molecule of NH3 (26 in exponent and 3 in NH at base) (II) If the weight of 1 atom of an element 'x'is 1.5710(-24) gram. Find the no. Of moles in 40kg of it? (-24is an exponent)