10223 + Interview Questions in Chemistry Page 3 InterviewSolution

101.	Name the separation technique used to separate metal pieces from the engine oil of the car
Answer» Name the separation technique used to separate metal pieces from the engine oil of the car

Discussion

102.	Why is alum used in water purification?
Answer» Why is alum used in water purification?

Discussion

103.	Statement 1: When baking soda is added in lemon juice, then a chemical change occurs. Statement 2: A change in which new substance is formed, is known as a physical change.
Answer» Statement 1: When baking soda is added in lemon juice, then a chemical change occurs. Statement 2: A change in which new substance is formed, is known as a physical change.

103.

Statement 1: When baking soda is added in lemon juice, then a chemical change occurs. Statement 2: A change in which new substance is formed, is known as a physical change.

Answer»

Statement 1: When baking soda is added in lemon juice, then a chemical change occurs.

Statement 2: A change in which new substance is formed, is known as a physical change.

Discussion

104.	oxidation state of oxygen in pottasium peroxid
Answer» oxidation state of oxygen in pottasium peroxid

Discussion

105.	Which one of the following statements is incorrect regarding lyophilic sols ?
Answer» Which one of the following statements is incorrect regarding lyophilic sols ?

Discussion

106.	Write scientific reasons.a. Atomic radius goes on decreasing while going from left to right in a period.b. Metallic character goes on decreasing while going from left to right in a period.c. Atomic radius goes on increasing down a group.d. Elements belonging to the same group have the same valency.e. The third period contains only eight elements even through the electron capacity of the third shell is 18 .
Answer» Write scientific reasons. a. Atomic radius goes on decreasing while going from left to right in a period. b. Metallic character goes on decreasing while going from left to right in a period. c. Atomic radius goes on increasing down a group. d. Elements belonging to the same group have the same valency. e. The third period contains only eight elements even through the electron capacity of the third shell is 18 .

Discussion

107.	Question 6(c) Calculate the molar mass of the following substances: (c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31)
Answer» Question 6(c) Calculate the molar mass of the following substances: (c) Phosphorus molecule, $P_{4}$ (atomic mass of phosphorus = 31)

Discussion

108.	In case of the fractional distillation of air, which of the following are correct?
Answer» In case of the fractional distillation of air, which of the following are correct?

Discussion

109.	The mass of one mole of NaOH will be( At. mass of Na =23, O = 16, H =1)
Answer» The mass of one mole of NaOH will be( At. mass of Na =23, O = 16, H =1)

Discussion

110.	A charge Q is to be divided on two objects . what should be the values of the charges on the two objects so that the force between the objects can be maximum?
Answer» A charge Q is to be divided on two objects . what should be the values of the charges on the two objects so that the force between the objects can be maximum?

Discussion

111.	What happens when HCl is treated with an aqueous solution of AgNO3?
Answer» What happens when HCl is treated with an aqueous solution of AgNO₃?

Discussion

112.	At which temperature does plasma change its state to Bose-Einstein condensate?
Answer» At which temperature does plasma change its state to Bose-Einstein condensate?

Discussion

113.	Question 5 List any three human activities that you think would lead to air pollution.
Answer» Question 5 List any three human activities that you think would lead to air pollution.

Discussion

114.	When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characterstic of the particles of matter is illustrated by this observation ?
Answer» When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characterstic of the particles of matter is illustrated by this observation ?

Discussion

115.	.The wavelength of the K, line for an element of atomicnumber 43 is λ . The wavelength of the α line for anelement of atomic number 29 43λ/29 42λ/28 9λ/4 4λ/
Answer» .The wavelength of the K, line for an element of atomicnumber 43 is λ . The wavelength of the α line for anelement of atomic number 29 43λ/29 42λ/28 9λ/4 4λ/

Discussion

116.	What are the limitations of Rutherford’s model of the atom?
Answer» What are the limitations of Rutherford’s model of the atom?

Discussion

117.	Write uses of radioactive isotopes in the Industrial field and in medical science?
Answer» Write uses of radioactive isotopes in the Industrial field and in medical science?

Discussion

118.	Question 1 (i) Which separation techniques will you apply for the separation of the following? i. Wheat grains from husk.
Answer» Question 1 (i) Which separation techniques will you apply for the separation of the following? i. Wheat grains from husk.

Discussion

119.	With an increase in surface area of reactants, the rate of reaction ___ .
Answer» With an increase in surface area of reactants, the rate of reaction ___ .

Discussion

120.	if zn+2/zn electrode is concentrated 100 times then the change in emf is
Answer» if zn+2/zn electrode is concentrated 100 times then the change in emf is

Discussion

121.	what is homogeneous and hetrogeneous mixture?
Answer» what is homogeneous and hetrogeneous mixture?

Discussion

122.	What is the atomicity of the molecule S8?
Answer» What is the atomicity of the molecule $S_{8}$ ?

Discussion

123.	75.The number of Joule contained in 1KWh is
Answer» 75.The number of Joule contained in 1KWh is

Discussion

124.	Which of the following is not formed when H2S reacts with acidic K2Cr2O7 solutions?
Answer» Which of the following is not formed when $H_{2} S$ reacts with acidic $K_{2} C r_{2} O_{7}$ solutions?

Discussion

125.	Which of the following shells represent the orbit number (n) = 2?
Answer» Which of the following shells represent the orbit number (n) = 2?

125.

Which of the following shells represent the orbit number (n) = 2?

Answer»

Which of the following shells represent the orbit number (n) = 2?

Discussion

126.	8. 0.225g of an organic dibasic acid required 100 ml of 0.05N NaOH solution to complete the neutralization. The molecular mass of the acid will be (A) 180 (B) 90 (C) 45 (D) 120
Answer» 8. 0.225g of an organic dibasic acid required 100 ml of 0.05N NaOH solution to complete the neutralization. The molecular mass of the acid will be (A) 180 (B) 90 (C) 45 (D) 120

Discussion

127.	69. The caiguaktion value of 200mL of a positive colloid took place when 0.73 g HCl was added to it without changing volume much. the floculation value of HCl of colloid is
Answer» 69. The caiguaktion value of 200mL of a positive colloid took place when 0.73 g HCl was added to it without changing volume much. the floculation value of HCl of colloid is

Discussion

128.	How will you separate a mixture of mercury, oil and water?
Answer» How will you separate a mixture of mercury, oil and water?

Discussion

129.	What is volume of O2 (Oxygen) required at 0 degree Celsius and 1 atm to burn completely 1 L propane gas (C3H8) ?
Answer» What is volume of O2 (Oxygen) required at 0 degree Celsius and 1 atm to burn completely 1 L propane gas (C3H8) ?

Discussion

130.	1.5g CdCl_2 was found to contain 0.9g of Cd.calculate the atomic weight of
Answer» 1.5g CdCl_2 was found to contain 0.9g of Cd.calculate the atomic weight of

Discussion

131.	Question 2 When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combinations will govern your answer?
Answer» Question 2 When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combinations will govern your answer?

Discussion

132.	Iodine reacts with hypo to give:
Answer» Iodine reacts with hypo to give:

Discussion

133.	In O2[PtF6] what will be charge on O2 and how to find it in case if we have to find the bond order of it
Answer» In O2[PtF6] what will be charge on O2 and how to find it in case if we have to find the bond order of it

Discussion

134.	5. If Aufbau and Hund's rule are not used, then incorrect statement is :- (1) Cu would be S-block element (2) Na will be same s-block (3) K would be d-block element (4) None of these
Answer» 5. If Aufbau and Hund's rule are not used, then incorrect statement is :- (1) Cu would be S-block element (2) Na will be same s-block (3) K would be d-block element (4) None of these

Discussion

135.	Statement 1: CFC's cause the depletion of the ozone layer. Statement 2: CFC's disturb the ozone-oxygen cyclic process.
Answer» Statement 1: CFC's cause the depletion of the ozone layer. Statement 2: CFC's disturb the ozone-oxygen cyclic process.

135.

Statement 1: CFC's cause the depletion of the ozone layer. Statement 2: CFC's disturb the ozone-oxygen cyclic process.

Answer»

Statement 1: CFC's cause the depletion of the ozone layer.

Statement 2: CFC's disturb the ozone-oxygen cyclic process.

Discussion

136.	With respect to the given assertion and reason, Choose the correct option. Assertion [A]: With an increase in the temperature of a gas inside a container, its pressure also increases. Reason [R]: Upon heating, the kinetic energy of the gas particles increases, which in turn results in a greater force exerted on the walls of the container.
Answer» With respect to the given assertion and reason, Choose the correct option. Assertion [A]: With an increase in the temperature of a gas inside a container, its pressure also increases. Reason [R]: Upon heating, the kinetic energy of the gas particles increases, which in turn results in a greater force exerted on the walls of the container.

Discussion

137.	Boron cannot form which of the following anions?
Answer» Boron cannot form which of the following anions?

Discussion

138.	Fist 20elements with their atomic masses and valency
Answer» Fist 20elements with their atomic masses and valency

Discussion

139.	Which of the following is correct pair of elements and its symbol?
Answer» Which of the following is correct pair of elements and its symbol?

Discussion

140.	Which of the following metals does not produce bubbles when they interact with hydrochloric acid ?
Answer» Which of the following metals does not produce bubbles when they interact with hydrochloric acid ?

Discussion

141.	How halogens are +m? .due to their high electronegativity they acts as a -m
Answer» How halogens are +m? .due to their high electronegativity they acts as a -m

Discussion

142.	if m,m_n,m_p are the masses of {X^A}_Z nucleus,nutron,proton then the value of m
Answer» if m,m_n,m_p are the masses of {X^A}_Z nucleus,nutron,proton then the value of m

Discussion

143.	Answer the following.A. What is pollution ?B. What are pollutants ?C. What is acid rain ?D. What is green house effect ?E. Which are visible pollutants known to you ?F. Which are invisible pollutants ?
Answer» Answer the following. A. What is pollution ? B. What are pollutants ? C. What is acid rain ? D. What is green house effect ? E. Which are visible pollutants known to you ? F. Which are invisible pollutants ?

Discussion

144.	If the aluminium salt of an anion X is Al2X3, What is the valency of X ? What will be the formula of the magnesium salt of X?
Answer» If the aluminium salt of an anion X is $A l_{2} X_{3}$ , What is the valency of X ? What will be the formula of the magnesium salt of X?

Discussion

145.	Which of the following is TRUE for CO2?
Answer» Which of the following is TRUE for $C O_{2}$ ?

Discussion

146.	Which of the following is true about CO2?
Answer» Which of the following is true about $C O_{2}$ ?

Discussion

147.	For the redox reaction, MnO−4+C2O2−4+H+→Mn2++CO2+H2O, the correct coefficients of the reactants, i.e. MnO−4,C2O2−4,H+ for the balanced reaction are respectively :
Answer» For the redox reaction, $M n O_{4}^{-} + C_{2} O_{4}^{2 -} + H^{+} \to M n^{2 +} + C O_{2} + H_{2} O$ , the correct coefficients of the reactants, i.e. $M n O_{4}^{-}, C_{2} O_{4}^{2 -}, H^{+}$ for the balanced reaction are respectively :

Discussion

148.	Question 9(b)What is the mass of:(b)0.5 mole of water molecules?
Answer» Question 9(b) What is the mass of: (b)0.5 mole of water molecules?

Discussion

149.	How many electrons upto 4th Shell can have n+l+m=4
Answer» How many electrons upto 4th Shell can have n+l+m=4

Discussion

150.	The correct functional group X and the reagent/ reaction conditions Y in the following scheme are
Answer» The correct functional group X and the reagent/ reaction conditions Y in the following scheme are

150.

The correct functional group X and the reagent/ reaction conditions Y in the following scheme are

Answer»

The correct functional group X and the reagent/ reaction conditions Y in the following scheme are

Discussion

Explore topic-wise InterviewSolutions in .

Name the separation technique used to separate metal pieces from the engine oil of the car

Why is alum used in water purification?

Statement 1: When baking soda is added in lemon juice, then a chemical change occurs. Statement 2: A change in which new substance is formed, is known as a physical change.

oxidation state of oxygen in pottasium peroxid

Which one of the following statements is incorrect regarding lyophilic sols ?

Question 6(c) Calculate the molar mass of the following substances: (c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31)

In case of the fractional distillation of air, which of the following are correct?

The mass of one mole of NaOH will be( At. mass of Na =23, O = 16, H =1)

A charge Q is to be divided on two objects . what should be the values of the charges on the two objects so that the force between the objects can be maximum?

What happens when HCl is treated with an aqueous solution of AgNO3?

At which temperature does plasma change its state to Bose-Einstein condensate?

Question 5 List any three human activities that you think would lead to air pollution.

When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characterstic of the particles of matter is illustrated by this observation ?

.The wavelength of the K, line for an element of atomicnumber 43 is λ . The wavelength of the α line for anelement of atomic number 29 43λ/29 42λ/28 9λ/4 4λ/

What are the limitations of Rutherford’s model of the atom?

Write uses of radioactive isotopes in the Industrial field and in medical science?

Question 1 (i) Which separation techniques will you apply for the separation of the following? i. Wheat grains from husk.

With an increase in surface area of reactants, the rate of reaction ___ .

if zn+2/zn electrode is concentrated 100 times then the change in emf is

what is homogeneous and hetrogeneous mixture?

What is the atomicity of the molecule S8?

75.The number of Joule contained in 1KWh is

Which of the following is not formed when H2S reacts with acidic K2Cr2O7 solutions?

Which of the following shells represent the orbit number (n) = 2?

8. 0.225g of an organic dibasic acid required 100 ml of 0.05N NaOH solution to complete the neutralization. The molecular mass of the acid will be (A) 180 (B) 90 (C) 45 (D) 120

69. The caiguaktion value of 200mL of a positive colloid took place when 0.73 g HCl was added to it without changing volume much. the floculation value of HCl of colloid is

How will you separate a mixture of mercury, oil and water?

What is volume of O2 (Oxygen) required at 0 degree Celsius and 1 atm to burn completely 1 L propane gas (C3H8) ?

1.5g CdCl_2 was found to contain 0.9g of Cd.calculate the atomic weight of

Question 2 When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combinations will govern your answer?

Iodine reacts with hypo to give:

In O2[PtF6] what will be charge on O2 and how to find it in case if we have to find the bond order of it

5. If Aufbau and Hund's rule are not used, then incorrect statement is :- (1) Cu would be S-block element (2) Na will be same s-block (3) K would be d-block element (4) None of these

Statement 1: CFC's cause the depletion of the ozone layer. Statement 2: CFC's disturb the ozone-oxygen cyclic process.

Boron cannot form which of the following anions?

Fist 20elements with their atomic masses and valency

Which of the following is correct pair of elements and its symbol?

Which of the following metals does not produce bubbles when they interact with hydrochloric acid ?

How halogens are +m? .due to their high electronegativity they acts as a -m

if m,m_n,m_p are the masses of {X^A}_Z nucleus,nutron,proton then the value of m

Answer the following.A. What is pollution ?B. What are pollutants ?C. What is acid rain ?D. What is green house effect ?E. Which are visible pollutants known to you ?F. Which are invisible pollutants ?

If the aluminium salt of an anion X is Al2X3, What is the valency of X ? What will be the formula of the magnesium salt of X?

Which of the following is TRUE for CO2?

Which of the following is true about CO2?

For the redox reaction, MnO−4+C2O2−4+H+→Mn2++CO2+H2O, the correct coefficients of the reactants, i.e. MnO−4,C2O2−4,H+ for the balanced reaction are respectively :

Question 9(b)What is the mass of:(b)0.5 mole of water molecules?

How many electrons upto 4th Shell can have n+l+m=4

The correct functional group X and the reagent/ reaction conditions Y in the following scheme are