10223 + Interview Questions in Chemistry Page 158 InterviewSolution

7851.	Is atom a matter or is does it occupy space regards...
Answer» Is atom a matter or is does it occupy space regards...

Discussion

7852.	What is the downward displacement of water?
Answer» What is the downward displacement of water?

Discussion

7853.	The volume of a gas _______ when the pressure to half and the absolute temperature is doubled? ( gas laws)
Answer» The volume of a gas _______ when the pressure to half and the absolute temperature is doubled? ( gas laws)

Discussion

7854.	Air is a mixture not a compound.Justify
Answer» Air is a mixture not a compound.Justify

Discussion

7855.	How will the rate of evaporation be affected if the density of the liquid is increased.? Why ?
Answer» How will the rate of evaporation be affected if the density of the liquid is increased.? Why ?

Discussion

7856.	What is the difference between an emulsion and a gel?
Answer» What is the difference between an emulsion and a gel?

Discussion

7857.	Among the following the maximum covalent character is shown by the compound _____
Answer» Among the following the maximum covalent character is shown by the compound _____

Discussion

7858.	How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?
Answer» How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?

Discussion

7859.	1.615 g of anhydrous ZnSO4 was places in moist air. After a few days, its mass was found to be 2.875g. The molecular formula for hydrated zinc sulphate is
Answer» 1.615 g of anhydrous $Z n S O_{4}$ was places in moist air. After a few days, its mass was found to be 2.875g. The molecular formula for hydrated zinc sulphate is

Discussion

7860.	A gaseous compound of molecular mass 82.1 dissociates on heating to 400K as : X2Y4(g)→X2(g)+2Y2(g). The density of the equilibrium mixture at a pressure of 1 atm and temperature of 400K is 2.0g L−1. The compound dissociates to the extent of :
Answer» A gaseous compound of molecular mass 82.1 dissociates on heating to 400K as : $X_{2} Y_{4 (g)} \to X_{2 (g)} + 2 Y_{2 (g)}$ . The density of the equilibrium mixture at a pressure of 1 atm and temperature of 400K is $2.0 g L^{- 1}$ . The compound dissociates to the extent of :

Discussion

7861.	In the formation of a molecule by an atom:
Answer» In the formation of a molecule by an atom:

7861.

In the formation of a molecule by an atom:

Answer»

In the formation of a molecule by an atom:

Discussion

7862.	Question 26 Calcium chloride when dissolved in water dissociates into its ions according to the following equation. CaCl2(aq)→Ca2+(aq)+2Cl−(aq) Calculate the number of ions obtained from CaCl2 when 222 g of it is dissolved in water.
Answer» Question 26 Calcium chloride when dissolved in water dissociates into its ions according to the following equation. $C a C l_{2} (a q) \to C a^{2 +} (a q) + 2 C l^{-} (a q)$ Calculate the number of ions obtained from $C a C l_{2}$ when 222 g of it is dissolved in water.

7862.

Question 26 Calcium chloride when dissolved in water dissociates into its ions according to the following equation. CaCl2(aq)→Ca2+(aq)+2Cl−(aq) Calculate the number of ions obtained from CaCl2 when 222 g of it is dissolved in water.

Answer»

Question 26
Calcium chloride when dissolved in water dissociates into its ions according to the following equation.

$C a C l_{2} (a q) \to C a^{2 +} (a q) + 2 C l^{-} (a q)$

Calculate the number of ions obtained from $C a C l_{2}$ when 222 g of it is dissolved in water.

Discussion

7863.	From the symbol 2412Mg, state the mass number, the atomic number and electronic configuration of magnesium.
Answer» From the symbol $_{12}^{24} M g,$ state the mass number, the atomic number and electronic configuration of magnesium.

Discussion

7864.	is the chemical formula of bleaching powder.
Answer» is the chemical formula of bleaching powder.

Discussion

7865.	Which theory/model has provided an explanation for the law of conservation of mass and the law of definite proportions?
Answer» Which theory/model has provided an explanation for the law of conservation of mass and the law of definite proportions?

Discussion

7866.	Barium chloride reacts with sodium sulphate to produce barium sulphate and sodium Which of the following chemical equations represents a complete balanced chemical equation for the given process?
Answer» Barium chloride reacts with sodium sulphate to produce barium sulphate and sodium Which of the following chemical equations represents a complete balanced chemical equation for the given process?

7866.

Barium chloride reacts with sodium sulphate to produce barium sulphate and sodium Which of the following chemical equations represents a complete balanced chemical equation for the given process?

Answer»

Barium chloride reacts with sodium sulphate to produce barium sulphate and sodium

Which of the following chemical equations represents a complete balanced chemical equation for the given process?

Discussion

7867.	Which of the following substance is used as dehydrating agent in laboratory
Answer» Which of the following substance is used as dehydrating agent in laboratory

Discussion

7868.	One day you were boiling water for making tea, you observed that at certain point, temperature became constant. It is because
Answer» One day you were boiling water for making tea, you observed that at certain point, temperature became constant. It is because

Discussion

7869.	Which part of an atom was discovered by Rutherford's alpha particle scattering experiment?
Answer» Which part of an atom was discovered by Rutherford's alpha particle scattering experiment?

Discussion

7870.	When water is heated to a temperature X, it gets converted into steam at temperature X by a process called R. And when steam at temperature X is cooled, it reconverted into the water at the same temperature X by a process called S. (a) How much is the value of X in Kelvin? (b) What is the process R called? (c) What is the name of the energy absorbed during the process R? (d) What is process S known as? (e) What is the name of energy released during the process S known as?
Answer» When water is heated to a temperature X, it gets converted into steam at temperature X by a process called R. And when steam at temperature X is cooled, it reconverted into the water at the same temperature X by a process called S. (a) How much is the value of X in Kelvin? (b) What is the process R called? (c) What is the name of the energy absorbed during the process R? (d) What is process S known as? (e) What is the name of energy released during the process S known as?

7870.

When water is heated to a temperature X, it gets converted into steam at temperature X by a process called R. And when steam at temperature X is cooled, it reconverted into the water at the same temperature X by a process called S. (a) How much is the value of X in Kelvin? (b) What is the process R called? (c) What is the name of the energy absorbed during the process R? (d) What is process S known as? (e) What is the name of energy released during the process S known as?

Answer»

When water is heated to a temperature X, it gets converted into steam at temperature X by a process called R. And when steam at temperature X is cooled, it reconverted into the water at the same temperature X by a process called S.

(a) How much is the value of X in Kelvin?

(b) What is the process R called?

(c) What is the name of the energy absorbed during the process R?

(d) What is process S known as?

(e) What is the name of energy released during the process S known as?

Discussion

7871.	The boiling point of ethane is, -88∘C. This temperature will be equivalent to : (a) 2852 K (b) 288 K (c) 185 K (d) 361 K
Answer» The boiling point of ethane is, - $88^{\circ}$ C. This temperature will be equivalent to : (a) 2852 K (b) 288 K (c) 185 K (d) 361 K

7871.

The boiling point of ethane is, -88∘C. This temperature will be equivalent to : (a) 2852 K (b) 288 K (c) 185 K (d) 361 K

Answer»

The boiling point of ethane is, - $88^{\circ}$ C. This temperature will be equivalent to :

(a) 2852 K (b) 288 K (c) 185 K (d) 361 K

Discussion

7872.	Hydrogen chloride is a/an ____ made up of H+ and Cl− which are ____ and _____ respectively.
Answer» Hydrogen chloride is a/an ____ made up of $H^{+}$ and ${Cl}^{-}$ which are ____ and _____ respectively.

Discussion

7873.	Which of the following process will result in an increase in the intermolecular space?
Answer» Which of the following process will result in an increase in the intermolecular space?

Discussion

7874.	The atomic number of four elements A, B, C and D are given below. Select the option that can act as a reducing agent for all the other options in a reaction. A - 11, B - 15, C - 8 and D - 9
Answer» The atomic number of four elements A, B, C and D are given below. Select the option that can act as a reducing agent for all the other options in a reaction. A - 11, B - 15, C - 8 and D - 9

7874.

The atomic number of four elements A, B, C and D are given below. Select the option that can act as a reducing agent for all the other options in a reaction. A - 11, B - 15, C - 8 and D - 9

Answer»

The atomic number of four elements A, B, C and D are given below.
Select the option that can act as a reducing agent for all the other options in a reaction.

A - 11, B - 15, C - 8 and D - 9

Discussion

7875.	A compound contains 40% by mass of oxygen . What would be the minimum molecular mass ? [2]
Answer» A compound contains 40% by mass of oxygen . What would be the minimum molecular mass ? [2]

Discussion

7876.	H2CO3 is called as ___________ acid
Answer» $H_{2} C O_{3}$ is called as ___________ acid

Discussion

7877.	Why is nitric acid used in rocket fuel?
Answer» Why is nitric acid used in rocket fuel?

Discussion

7878.	The atomicity of the molecule X2(ZYS4)3 is __.
Answer» The atomicity of the molecule $X_{2} (Z Y S_{4})_{3}$ is __.

Discussion

7879.	Question 5 Which of the following are homogeneous in nature? (i) Ice (ii) Wood (iii) Soil (iv) Air (a) (i) and (iii) (b) (ii) and (iv) (c) (i) and (iv) (d) (iii) and (iv)
Answer» Question 5 Which of the following are homogeneous in nature? (i) Ice (ii) Wood (iii) Soil (iv) Air (a) (i) and (iii) (b) (ii) and (iv) (c) (i) and (iv) (d) (iii) and (iv)

Discussion

7880.	Equal amount of tea is kept in the cup and saucer. The tea cools faster when placed in a saucer than in a cup. This phenomenon shows that rate of evaporation depends on:
Answer» Equal amount of tea is kept in the cup and saucer. The tea cools faster when placed in a saucer than in a cup. This phenomenon shows that rate of evaporation depends on:

7880.

Equal amount of tea is kept in the cup and saucer. The tea cools faster when placed in a saucer than in a cup. This phenomenon shows that rate of evaporation depends on:

Answer»

Equal amount of tea is kept in the cup and saucer. The tea cools faster when placed in a saucer than in a cup. This phenomenon shows that rate of evaporation depends on:

Discussion

7881.	Shivam took a balloon and filled it with 2 gms of hydrogen and Swami took a balloon and filled it with 32gms of oxygen. Which one of the following will have bigger size?
Answer» Shivam took a balloon and filled it with 2 gms of hydrogen and Swami took a balloon and filled it with 32gms of oxygen. Which one of the following will have bigger size?

7881.

Shivam took a balloon and filled it with 2 gms of hydrogen and Swami took a balloon and filled it with 32gms of oxygen. Which one of the following will have bigger size?

Answer»

Shivam took a balloon and filled it with 2 gms of hydrogen and Swami took a balloon and filled it with 32gms of oxygen. Which one of the following will have bigger size?

Discussion

7882.	What is the mass of 5 moles of argon?
Answer» What is the mass of 5 moles of argon?

Discussion

7883.	Define Sublimation. Draw a labelled diagram to illustrate the process of sublimation. [3MARKS].
Answer» Define Sublimation. Draw a labelled diagram to illustrate the process of sublimation. [3MARKS].

Discussion

7884.	Do water vapour change into fog also when the condensed a little
Answer» Do water vapour change into fog also when the condensed a little

Discussion

7885.	What do you mean by a substance?
Answer» What do you mean by a substance?

Discussion

7886.	(a) What are metalloids? Name two metalloids.(b) Classify the following elements into metals,non-metals, and metalloids: Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.
Answer» (a) What are metalloids? Name two metalloids. (b) Classify the following elements into metals,non-metals, and metalloids: Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.

7886.

(a) What are metalloids? Name two metalloids.(b) Classify the following elements into metals,non-metals, and metalloids: Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.

Answer»

(a) What are metalloids? Name two metalloids.

(b) Classify the following elements into metals,non-metals, and metalloids:

Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.

Discussion

7887.	What causes acid rain? How acid rains affect monuments such as Taj Mahal? Also, give chemical equation. [3 MARKS]
Answer» What causes acid rain? How acid rains affect monuments such as Taj Mahal? Also, give chemical equation. [3 MARKS]

Discussion

7888.	Explain the permutit method for softening hard water.
Answer» Explain the permutit method for softening hard water.

Discussion

7889.	Oxidation can be defined as the chemical process which involves:-
Answer» Oxidation can be defined as the chemical process which involves:-

Discussion

7890.	Among the following which are the two elements that Newlands placed in the same slot and positioned in the same column with fluorine, chlorine and bromine?
Answer» Among the following which are the two elements that Newlands placed in the same slot and positioned in the same column with fluorine, chlorine and bromine?

Discussion

7891.	What is the difference between atom and molecule
Answer» What is the difference between atom and molecule

Discussion

7892.	Question 2 The following reaction is an example of a 4NH3(g)+5O2(g)→4NO(g)+6H2O(g) (i) Displacement reaction (ii) Combination reaction (iii) Redox reaction (iv) Neutralisation reaction (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv)
Answer» Question 2 The following reaction is an example of a $4 {NH}_{3} (g) + 5 O_{2} (g) \to 4 NO(g) + 6 H_{2} O(g)$ (i) Displacement reaction (ii) Combination reaction (iii) Redox reaction (iv) Neutralisation reaction (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv)

Discussion

7893.	From the α-particle scattering experiment, Rutherford concluded that
Answer» From the $α$ -particle scattering experiment, Rutherford concluded that

Discussion

7894.	Describe the experiment that led to discovery of Law of conservation of mass?
Answer» Describe the experiment that led to discovery of Law of conservation of mass?

Discussion

7895.	Why do steel boats doesn't sink in water whereas the steel needle sinks?
Answer» Why do steel boats doesn't sink in water whereas the steel needle sinks?

Discussion

7896.	Whic of te following sequences contain atomic numbers of only representative elements? (a) 3, 33 53, 87, (b) 2,10,22,36 (c) 7,17,25,37,48 (d) 9,35,51,88
Answer» Whic of te following sequences contain atomic numbers of only representative elements? (a) 3, 33 53, 87, (b) 2,10,22,36 (c) 7,17,25,37,48 (d) 9,35,51,88

Discussion

7897.	Question 3 The chemical symbol for nitrogen gas is (a) Ni (b) N2 (c) N+ (d) N
Answer» Question 3 The chemical symbol for nitrogen gas is (a) Ni (b) $N_{2}$ (c) $N^{+}$ (d) N

Discussion

7898.	A waxy white solid is burnt in air (with an excess supply of air) in an extraordinarily exothermic reaction. The product of this reaction rapidly undergoes complete hydrolysis to yield an acid X. The acid X is:
Answer» A waxy white solid is burnt in air (with an excess supply of air) in an extraordinarily exothermic reaction. The product of this reaction rapidly undergoes complete hydrolysis to yield an acid X. The acid X is:

Discussion

7899.	Complete the following reaction: CH3CH2OH + O2 → +H2O
Answer» Complete the following reaction: $C H_{3} C H_{2} O H + O_{2} \to$ $+ H_{2} O$

Discussion

7900.	If a small amount of baking soda is added to water, then the water becomes __________.
Answer» If a small amount of baking soda is added to water, then the water becomes __________.

Discussion

Explore topic-wise InterviewSolutions in .

Is atom a matter or is does it occupy space regards...

What is the downward displacement of water?

The volume of a gas _______ when the pressure to half and the absolute temperature is doubled? ( gas laws)

Air is a mixture not a compound.Justify

How will the rate of evaporation be affected if the density of the liquid is increased.? Why ?

What is the difference between an emulsion and a gel?

Among the following the maximum covalent character is shown by the compound _____

How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?

1.615 g of anhydrous ZnSO4 was places in moist air. After a few days, its mass was found to be 2.875g. The molecular formula for hydrated zinc sulphate is

A gaseous compound of molecular mass 82.1 dissociates on heating to 400K as : X2Y4(g)→X2(g)+2Y2(g). The density of the equilibrium mixture at a pressure of 1 atm and temperature of 400K is 2.0g L−1. The compound dissociates to the extent of :

In the formation of a molecule by an atom:

Question 26 Calcium chloride when dissolved in water dissociates into its ions according to the following equation. CaCl2(aq)→Ca2+(aq)+2Cl−(aq) Calculate the number of ions obtained from CaCl2 when 222 g of it is dissolved in water.

From the symbol 2412Mg, state the mass number, the atomic number and electronic configuration of magnesium.

is the chemical formula of bleaching powder.

Which theory/model has provided an explanation for the law of conservation of mass and the law of definite proportions?

Barium chloride reacts with sodium sulphate to produce barium sulphate and sodium Which of the following chemical equations represents a complete balanced chemical equation for the given process?

Which of the following substance is used as dehydrating agent in laboratory

One day you were boiling water for making tea, you observed that at certain point, temperature became constant. It is because

Which part of an atom was discovered by Rutherford's alpha particle scattering experiment?

The boiling point of ethane is, -88∘C. This temperature will be equivalent to : (a) 2852 K (b) 288 K (c) 185 K (d) 361 K

Hydrogen chloride is a/an ____ made up of H+ and Cl− which are ____ and _____ respectively.

Which of the following process will result in an increase in the intermolecular space?

The atomic number of four elements A, B, C and D are given below. Select the option that can act as a reducing agent for all the other options in a reaction. A - 11, B - 15, C - 8 and D - 9

A compound contains 40% by mass of oxygen . What would be the minimum molecular mass ? [2]

H2CO3 is called as ___________ acid

Why is nitric acid used in rocket fuel?

The atomicity of the molecule X2(ZYS4)3 is __.

Question 5 Which of the following are homogeneous in nature? (i) Ice (ii) Wood (iii) Soil (iv) Air (a) (i) and (iii) (b) (ii) and (iv) (c) (i) and (iv) (d) (iii) and (iv)

Equal amount of tea is kept in the cup and saucer. The tea cools faster when placed in a saucer than in a cup. This phenomenon shows that rate of evaporation depends on:

Shivam took a balloon and filled it with 2 gms of hydrogen and Swami took a balloon and filled it with 32gms of oxygen. Which one of the following will have bigger size?

What is the mass of 5 moles of argon?

Define Sublimation. Draw a labelled diagram to illustrate the process of sublimation. [3MARKS].

Do water vapour change into fog also when the condensed a little

What do you mean by a substance?

(a) What are metalloids? Name two metalloids.(b) Classify the following elements into metals,non-metals, and metalloids: Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.

What causes acid rain? How acid rains affect monuments such as Taj Mahal? Also, give chemical equation. [3 MARKS]

Explain the permutit method for softening hard water.

Oxidation can be defined as the chemical process which involves:-

Among the following which are the two elements that Newlands placed in the same slot and positioned in the same column with fluorine, chlorine and bromine?

What is the difference between atom and molecule

Question 2 The following reaction is an example of a 4NH3(g)+5O2(g)→4NO(g)+6H2O(g) (i) Displacement reaction (ii) Combination reaction (iii) Redox reaction (iv) Neutralisation reaction (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv)

From the α-particle scattering experiment, Rutherford concluded that

Describe the experiment that led to discovery of Law of conservation of mass?

Why do steel boats doesn't sink in water whereas the steel needle sinks?

Whic of te following sequences contain atomic numbers of only representative elements? (a) 3, 33 53, 87, (b) 2,10,22,36 (c) 7,17,25,37,48 (d) 9,35,51,88

Question 3 The chemical symbol for nitrogen gas is (a) Ni (b) N2 (c) N+ (d) N

A waxy white solid is burnt in air (with an excess supply of air) in an extraordinarily exothermic reaction. The product of this reaction rapidly undergoes complete hydrolysis to yield an acid X. The acid X is:

Complete the following reaction: CH3CH2OH + O2 → +H2O

If a small amount of baking soda is added to water, then the water becomes __________.

Hydrogen chloride is a/an made up of H+ and Cl− which are and _ respectively.