10223 + Interview Questions in Chemistry Page 182 InterviewSolution

9051.	Hydrochloric acid and calcium oxide are pure substances ? please explain .
Answer» Hydrochloric acid and calcium oxide are pure substances ? please explain .

Discussion

9052.	How many mole of Na ions are in 20 ml of 0.40 M of Na3PO4 ?
Answer» How many mole of Na ions are in 20 ml of 0.40 M of Na3PO4 ?

Discussion

9053.	Which gas has the highest contribution toward green-house effect?
Answer» Which gas has the highest contribution toward green-house effect?

Discussion

9054.	What is latent heat of vaporisation?
Answer» What is latent heat of vaporisation?

Discussion

9055.	Big procedure on Activity Decomposition reaction
Answer» Big procedure on Activity Decomposition reaction

Discussion

9056.	Which of the following hydroxides is amphoteric in nature?
Answer» Which of the following hydroxides is amphoteric in nature?

Discussion

9057.	What should be added to a Celsius scale reading so as to obtain the corresponding Kelvin scale reading?
Answer» What should be added to a Celsius scale reading so as to obtain the corresponding Kelvin scale reading?

Discussion

9058.	Which of the following statement is correct?
Answer» Which of the following statement is correct?

Discussion

9059.	Grains containing stones is an example of:
Answer» Grains containing stones is an example of:

Discussion

9060.	The stream of water flowing through the tap remains the same even if we try to disturb it with our fingers. Which of the following property is responsible for this?
Answer» The stream of water flowing through the tap remains the same even if we try to disturb it with our fingers. Which of the following property is responsible for this?

Discussion

9061.	The number of water molecules in 250 mL of water is closest to Given Density of water is 1.0 gmL–1;Avogadro′s number=6.023×1023
Answer» The number of water molecules in 250 $m L$ of water is closest to Given $D e n s i t y o f w a t e r i s 1.0 g m L^{- 1}; A v o g a d r o^{'} s n u m b e r = 6.023 \times 10^{23}$

Discussion

9062.	Question 17 Number of valence electrons in Cl− ion is: (a) 16 (b) 8 (c) 17 (d) 18
Answer» Question 17 Number of valence electrons in $C l^{-}$ ion is: (a) 16 (b) 8 (c) 17 (d) 18

Discussion

9063.	Name the gas that can readily decolourise acidified KMnO4 solution.
Answer» Name the gas that can readily decolourise acidified $K M n O_{4}$ solution.

Discussion

9064.	The tendency to react and form molecules with atoms of the same elements or different elements is an attempt to attain _________.
Answer» The tendency to react and form molecules with atoms of the same elements or different elements is an attempt to attain _________.

Discussion

9065.	Question 23 Find out the valency of the atoms represented by the figure (a) and (b).
Answer» Question 23 Find out the valency of the atoms represented by the figure (a) and (b).

Discussion

9066.	Statement A- Each atom of sodium is 23 times heavier than one atom of hydrogen. Statement R- The atomic weight of sodium is 23 and hydrogen is 1.
Answer» Statement A- Each atom of sodium is 23 times heavier than one atom of hydrogen. Statement R- The atomic weight of sodium is 23 and hydrogen is 1.

9066.

Statement A- Each atom of sodium is 23 times heavier than one atom of hydrogen. Statement R- The atomic weight of sodium is 23 and hydrogen is 1.

Answer»

Statement A- Each atom of sodium is 23 times heavier than one atom of hydrogen.

Statement R- The atomic weight of sodium is 23 and hydrogen is 1.

Discussion

9067.	What is solvent and solute?
Answer» What is solvent and solute?

Discussion

9068.	Which of the following characteristic is shown by particles of matter?
Answer» Which of the following characteristic is shown by particles of matter?

Discussion

9069.	If A=23 and Z=11 for Na atom, how many neutrons are present in Na atom? __
Answer» If A=23 and Z=11 for Na atom, how many neutrons are present in Na atom? __

9069.

If A=23 and Z=11 for Na atom, how many neutrons are present in Na atom? __

Answer»

If A=23 and Z=11 for Na atom, how many neutrons are present in Na atom?

__

Discussion

9070.	what types of liquids can be separated through distillation
Answer» what types of liquids can be separated through distillation

Discussion

9071.	When atoms bond with each other , they exchange ________
Answer» When atoms bond with each other , they exchange ________

Discussion

9072.	Explain how excessive use of nitrate fertilizers in agricultural fields affects human life.
Answer» Explain how excessive use of nitrate fertilizers in agricultural fields affects human life.

Discussion

9073.	If number of molecules in a sample of sulphur dioxide is 3.011×1023 then calculate the number of oxygen atoms in it.
Answer» If number of molecules in a sample of sulphur dioxide is 3.011×1023 then calculate the number of oxygen atoms in it.

Discussion

9074.	Sir I am Shaun job of class 9,I have a doubt regarding chemistry on the topic of ionisation How many ions are formed by complete ionisation of one molecule of Al2(SO4)3 in water .Is there any formulas for claculating the number of ions formed when some amount of substance is dissolved in any solvent.and does the solvent play any role in this? Thank you Sir Shaun
Answer» Sir I am Shaun job of class 9,I have a doubt regarding chemistry on the topic of ionisation How many ions are formed by complete ionisation of one molecule of Al₂(SO₄)₃in water .Is there any formulas for claculating the number of ions formed when some amount of substance is dissolved in any solvent.and does the solvent play any role in this? Thank you Sir Shaun

Discussion

9075.	The shape of a 2s orbital resembles:
Answer» The shape of a 2s orbital resembles:

Discussion

9076.	Explain the conservation of solid to liquid on the basis of kinetic theory of matter?
Answer» Explain the conservation of solid to liquid on the basis of kinetic theory of matter?

Discussion

9077.	What is the short definition for homogeneous and heterogeneous mixture???
Answer» What is the short definition for homogeneous and heterogeneous mixture???

Discussion

9078.	We study colloids as part of surface phenomena because
Answer» We study colloids as part of surface phenomena because

Discussion

9079.	Sir what is the formula of converting Fahrenheit into Celsius? And plz give me one solved example? Thank you so much
Answer» Sir what is the formula of converting Fahrenheit into Celsius? And plz give me one solved example? Thank you so much

9079.

Sir what is the formula of converting Fahrenheit into Celsius? And plz give me one solved example? Thank you so much

Answer»

Sir what is the formula of converting Fahrenheit into Celsius? And plz give me one solved example?

Thank you so much

Discussion

9080.	How can clothes gets dry faster by the process of evaporation please explain to me, in a short and easy way....so that I can learn it faster
Answer» How can clothes gets dry faster by the process of evaporation please explain to me, in a short and easy way....so that I can learn it faster

Discussion

9081.	The electronic configuration of an element is 2, 8, 4. Which group will the element belong to?
Answer» The electronic configuration of an element is 2, 8, 4. Which group will the element belong to?

Discussion

9082.	The transition metals exhibit a ___ density than the alkali and alkaline earth metals.
Answer» The transition metals exhibit a ___ density than the alkali and alkaline earth metals.

Discussion

9083.	How will you test whether a given solution is a colloidal solution?
Answer» How will you test whether a given solution is a colloidal solution?

Discussion

9084.	Name the law of chemical combination: (a) Which was given by Lavoisier. (b) Which was given by Proust.
Answer» Name the law of chemical combination: (a) Which was given by Lavoisier. (b) Which was given by Proust.

9084.

Name the law of chemical combination: (a) Which was given by Lavoisier. (b) Which was given by Proust.

Answer»

Name the law of chemical combination:

(a) Which was given by Lavoisier.

(b) Which was given by Proust.

Discussion

9085.	Which is chemically most active non metal?
Answer» Which is chemically most active non metal?

Discussion

9086.	Matter was believed to be continuous like a block of wood. What does the word continuous mean here and how it is related to the block of wood?
Answer» Matter was believed to be continuous like a block of wood. What does the word continuous mean here and how it is related to the block of wood?

Discussion

9087.	What is the meaning of fizzy water??
Answer» What is the meaning of fizzy water??

Discussion

9088.	Hydrogen is a good _________ agent with nonmetals
Answer» Hydrogen is a good _________ agent with nonmetals

Discussion

9089.	Give reasons for the following: The smell of hot sizzling food reaches you several meters away , but to get the smell from cold food you have to go close.
Answer» Give reasons for the following: The smell of hot sizzling food reaches you several meters away , but to get the smell from cold food you have to go close.

Discussion

9090.	A compound has an empirical formula of C2HBr. If the molar mass of the compound is 314.7 g/mol, what is the molecular formula of the compound? (Atomic mass of Br = 80g/mol)
Answer» A compound has an empirical formula of C₂HBr. If the molar mass of the compound is 314.7 g/mol, what is the molecular formula of the compound? (Atomic mass of Br = 80g/mol)

Discussion

9091.	The given statement is correctly completed by alternative Densities of most substances____I____ when they are converted to solid state, though in case of____II____, the opposite is true. The given statement is correctly completed by alternative
Answer» The given statement is correctly completed by alternative Densities of most substances____I____ when they are converted to solid state, though in case of____II____, the opposite is true. The given statement is correctly completed by alternative

9091.

The given statement is correctly completed by alternative Densities of most substancesI when they are converted to solid state, though in case ofII, the opposite is true. The given statement is correctly completed by alternative

Answer»

The given statement is correctly completed by alternative

Densities of most substances____I____ when they are converted to solid state, though in case of____II____, the opposite is true.

The given statement is correctly completed by alternative

Discussion

9092.	Question 12 If Z = 3, what would be the valency of the element? Also, name the element.
Answer» Question 12 If Z = 3, what would be the valency of the element? Also, name the element.

Discussion

9093.	In the balanced chemical reaction, IO−3+a I−+b H+⟶c H2O+d I2 a, b, c and d respectively correspond to
Answer» In the balanced chemical reaction, $I O_{3}^{-} + a I^{-} + b H^{+} ⟶ c H_{2} O + d I_{2}$ a, b, c and d respectively correspond to

Discussion

9094.	What is the mass of 4.82 x 1025 molecules of H2O in grams? ___ gm. (upto 2 decimal places)
Answer» What is the mass of 4.82 x $10^{25}$ molecules of $H_{2} O$ in grams? ___ gm. (upto 2 decimal places)

Discussion

9095.	What are the drawbacks of Newland’s Law of Octaves? (A) The law of octaves was found to be applicable only till calcium. It was not applicable to elements of higher atomic masses. (B) Some unlike elements were placed in same column (C) Some similar elements were placed farther apart.
Answer» What are the drawbacks of Newland’s Law of Octaves? (A) The law of octaves was found to be applicable only till calcium. It was not applicable to elements of higher atomic masses. (B) Some unlike elements were placed in same column (C) Some similar elements were placed farther apart.

9095.

What are the drawbacks of Newland’s Law of Octaves? (A) The law of octaves was found to be applicable only till calcium. It was not applicable to elements of higher atomic masses. (B) Some unlike elements were placed in same column (C) Some similar elements were placed farther apart.

Answer»

What are the drawbacks of Newland’s Law of Octaves?

(A) The law of octaves was found to be applicable only till calcium. It was not applicable to elements of higher atomic masses.

(B) Some unlike elements were placed in same column

(C) Some similar elements were placed farther apart.

Discussion

9096.	Question 4 (ii) How many atoms are present in a: (ii) PO3−4ion
Answer» Question 4 (ii) How many atoms are present in a: $(i i) P O_{4}^{3 -} i o n$

Discussion

9097.	A boy added a large spoon of sugar to both boiling water and cold water and observed the solution formed. Which among the following is closest to his observation?
Answer» A boy added a large spoon of sugar to both boiling water and cold water and observed the solution formed. Which among the following is closest to his observation?

Discussion

9098.	Is water a solution?
Answer» Is water a solution?

Discussion

9099.	What are elements?
Answer» What are elements?

Discussion

9100.	If 100 grams of pure water taken from different sources is decomposed by passing electricity, 11 grams of hydrogen and 89 grams of oxygen are always obtained.' Which chemical law is illustrated by this statement?
Answer» If 100 grams of pure water taken from different sources is decomposed by passing electricity, 11 grams of hydrogen and 89 grams of oxygen are always obtained.' Which chemical law is illustrated by this statement?

Discussion

Explore topic-wise InterviewSolutions in .

Hydrochloric acid and calcium oxide are pure substances ? please explain .

How many mole of Na ions are in 20 ml of 0.40 M of Na3PO4 ?

Which gas has the highest contribution toward green-house effect?

What is latent heat of vaporisation?

Big procedure on Activity Decomposition reaction

Which of the following hydroxides is amphoteric in nature?

What should be added to a Celsius scale reading so as to obtain the corresponding Kelvin scale reading?

Which of the following statement is correct?

Grains containing stones is an example of:

The stream of water flowing through the tap remains the same even if we try to disturb it with our fingers. Which of the following property is responsible for this?

The number of water molecules in 250 mL of water is closest to Given Density of water is 1.0 gmL–1;Avogadro′s number=6.023×1023

Question 17 Number of valence electrons in Cl− ion is: (a) 16 (b) 8 (c) 17 (d) 18

Name the gas that can readily decolourise acidified KMnO4 solution.

The tendency to react and form molecules with atoms of the same elements or different elements is an attempt to attain _________.

Question 23 Find out the valency of the atoms represented by the figure (a) and (b). ​​​​​​​

Statement A- Each atom of sodium is 23 times heavier than one atom of hydrogen. Statement R- The atomic weight of sodium is 23 and hydrogen is 1.

What is solvent and solute?

Which of the following characteristic is shown by particles of matter?

If A=23 and Z=11 for Na atom, how many neutrons are present in Na atom? __

what types of liquids can be separated through distillation

When atoms bond with each other , they exchange ________

Explain how excessive use of nitrate fertilizers in agricultural fields affects human life.

If number of molecules in a sample of sulphur dioxide is 3.011×1023 then calculate the number of oxygen atoms in it.

The shape of a 2s orbital resembles:

Explain the conservation of solid to liquid on the basis of kinetic theory of matter?

What is the short definition for homogeneous and heterogeneous mixture???

We study colloids as part of surface phenomena because

Sir what is the formula of converting Fahrenheit into Celsius? And plz give me one solved example? Thank you so much

How can clothes gets dry faster by the process of evaporation please explain to me, in a short and easy way....so that I can learn it faster

The electronic configuration of an element is 2, 8, 4. Which group will the element belong to?

The transition metals exhibit a ___ density than the alkali and alkaline earth metals.

How will you test whether a given solution is a colloidal solution?

Name the law of chemical combination: (a) Which was given by Lavoisier. (b) Which was given by Proust.

Which is chemically most active non metal?

Matter was believed to be continuous like a block of wood. What does the word continuous mean here and how it is related to the block of wood?

What is the meaning of fizzy water??

Hydrogen is a good _________ agent with nonmetals

Give reasons for the following: The smell of hot sizzling food reaches you several meters away , but to get the smell from cold food you have to go close.

A compound has an empirical formula of C2HBr. If the molar mass of the compound is 314.7 g/mol, what is the molecular formula of the compound? (Atomic mass of Br = 80g/mol)

The given statement is correctly completed by alternative Densities of most substances____I____ when they are converted to solid state, though in case of____II____, the opposite is true. The given statement is correctly completed by alternative

Question 12 If Z = 3, what would be the valency of the element? Also, name the element.

In the balanced chemical reaction, IO−3+a I−+b H+⟶c H2O+d I2 a, b, c and d respectively correspond to

What is the mass of 4.82 x 1025 molecules of H2O in grams? ___ gm. (upto 2 decimal places)

What are the drawbacks of Newland’s Law of Octaves? (A) The law of octaves was found to be applicable only till calcium. It was not applicable to elements of higher atomic masses. (B) Some unlike elements were placed in same column (C) Some similar elements were placed farther apart.

Question 4 (ii) How many atoms are present in a: (ii) PO3−4ion

A boy added a large spoon of sugar to both boiling water and cold water and observed the solution formed. Which among the following is closest to his observation?

Is water a solution?

What are elements?

If 100 grams of pure water taken from different sources is decomposed by passing electricity, 11 grams of hydrogen and 89 grams of oxygen are always obtained.' Which chemical law is illustrated by this statement?

Question 23 Find out the valency of the atoms represented by the figure (a) and (b).

The given statement is correctly completed by alternative Densities of most substancesI when they are converted to solid state, though in case ofII, the opposite is true. The given statement is correctly completed by alternative