7248 + Interview Questions in Chemistry Page 74 InterviewSolution

3651.	Grapes when kept in a thick sugar solution ____________________.
Answer» Grapes when kept in a thick sugar solution ____________________.

Discussion

3652.	The technology used in assessing the oil reservoir is:
Answer» The technology used in assessing the oil reservoir is:

Discussion

3653.	Thermocol is produced from whichmaterial?
Answer» Thermocol is produced from which material?

Discussion

3654.	The anomalous expansion of water is a boon to which of the given habitats in cold regions?
Answer» The anomalous expansion of water is a boon to which of the given habitats in cold regions?

Discussion

3655.	If pH of solution X is 6 and pH of solution Y is 13. What is formed when X and Y are reacted with each other?
Answer» If pH of solution X is 6 and pH of solution Y is 13. What is formed when X and Y are reacted with each other?

3655.

If pH of solution X is 6 and pH of solution Y is 13. What is formed when X and Y are reacted with each other?

Answer»

If pH of solution X is 6 and pH of solution Y is 13.

What is formed when X and Y are reacted with each other?

Discussion

3656.	. A given solution of NaOH contains 2.00 g of NaOH per litre of solution. Calculate the molarityof this solution.
Answer» . A given solution of NaOH contains 2.00 g of NaOH per litre of solution. Calculate the molarityof this solution.

Discussion

3657.	The metal which melts in hand is
Answer» The metal which melts in hand is

Discussion

3658.	Explain hydro power plant in detail.
Answer» Explain hydro power plant in detail.

Discussion

3659.	Which synthetic fibre was first discovered?
Answer» Which synthetic fibre was first discovered?

Discussion

3660.	What of the following is not the characteristic property of a supersaturated solutions?
Answer» What of the following is not the characteristic property of a supersaturated solutions?

Discussion

3661.	Which of the follownig is/are examples of polar molecular solids?
Answer» Which of the follownig is/are examples of polar molecular solids?

Discussion

3662.	How does Xe form bonds ( as in XeFO4) despite having complete octet and no covalency?
Answer» How does Xe form bonds ( as in XeFO4) despite having complete octet and no covalency?

Discussion

3663.	A pice of ice floating in a jar containing water.What will be the effect on the water level in the jar when ice melts and the temperature falls from 4^{0 }C to 1^{0 }C ? (A)Level of water rises. (B)Level of water remains the same. (C)Level of water decreases. (D)level of water first rises then decreases.
Answer» A pice of ice floating in a jar containing water.What will be the effect on the water level in the jar when ice melts and the temperature falls from 4^{0 }C to 1^{0 }C ? (A)Level of water rises. (B)Level of water remains the same. (C)Level of water decreases. (D)level of water first rises then decreases.

Discussion

3664.	What is slow combustion?
Answer» What is slow combustion?

Discussion

3665.	State the type of the underlined phrase in the sentence. Mario and Julio were the sons of Ricardo and Julia.
Answer» State the type of the underlined phrase in the sentence. Mario and Julio were the sons of Ricardo and Julia.

3665.

State the type of the underlined phrase in the sentence. Mario and Julio were the sons of Ricardo and Julia.

Answer»

State the type of the underlined phrase in the sentence.

Mario and Julio were the sons of Ricardo and Julia.

Discussion

3666.	13. The force between two point charges in air is100 N. If the distance between them is increasedby 50%, then the force between two charges willbe nearly equal to(1) 50 N(3) 100 N(2) 56 N(4) 44 N
Answer» 13. The force between two point charges in air is100 N. If the distance between them is increasedby 50%, then the force between two charges willbe nearly equal to(1) 50 N(3) 100 N(2) 56 N(4) 44 N

Discussion

3667.	Select the equation for [B] at any time t in the following reaction. Let the initial concentration of A be $[A]_0$ and B and C be 0.
Answer» Select the equation for [B] at any time t in the following reaction. Let the initial concentration of A be $[A]_0$ and B and C be 0.

Discussion

3668.	What do you understand by the term electroplating?
Answer» What do you understand by the term electroplating?

Discussion

3669.	The properties of _________ are ductility and mallebility.__________ are poor conductors of heat and electricity.__________ has intermediate properties.
Answer» The properties of _________ are ductility and mallebility. __________ are poor conductors of heat and electricity. __________ has intermediate properties.

Discussion

3670.	A student is performing displacement reactions of metals with salt solutions.(a) In first case, the student keeps a strip of copper metal in iron (II) sulphate solution for a considerable time(b) In second case, the student keeps a strip of zinc metal in copper (II) sulphate solution for a considerable time (i) In which case the displacement reaction will take place? Why? (ii) In which case the displacement reaction will not take place? Why not?
Answer» A student is performing displacement reactions of metals with salt solutions. (a) In first case, the student keeps a strip of copper metal in iron (II) sulphate solution for a considerable time (b) In second case, the student keeps a strip of zinc metal in copper (II) sulphate solution for a considerable time (i) In which case the displacement reaction will take place? Why? (ii) In which case the displacement reaction will not take place? Why not?

Discussion

3671.	Addition of catalyst at 300K increases the rate by a factor of 36.By how many kJ activation energy of catalysed pathway is less than the activation energy of original pathway?(\log6=0.78 R=8.3) 1.6kJ 2.9kJ 3.10kJ 4.12kJ
Answer» Addition of catalyst at 300K increases the rate by a factor of 36.By how many kJ activation energy of catalysed pathway is less than the activation energy of original pathway?(\log6=0.78 R=8.3) 1.6kJ 2.9kJ 3.10kJ 4.12kJ

Discussion

3672.	The energy of an electron in Bohr's orbit of hydrogen atom is -13.6eV. The total electronic energy of a hypothetical' He atom in which there is no electron-electron repulsion is (1) 27.2 eV (2) -27.2eV (3) -108.8eV (4) 108eV
Answer» The energy of an electron in Bohr's orbit of hydrogen atom is -13.6eV. The total electronic energy of a hypothetical' He atom in which there is no electron-electron repulsion is (1) 27.2 eV (2) -27.2eV (3) -108.8eV (4) 108eV

Discussion

3673.	Which of the following is a metal?
Answer» Which of the following is a metal?

Discussion

3674.	What are water pollutants? [2 MARKS]
Answer» What are water pollutants? [2 MARKS]

Discussion

3675.	Question 4:Classify the various types of Acids based on their sources.
Answer» Question 4: Classify the various types of Acids based on their sources.

3675.

Question 4:Classify the various types of Acids based on their sources.

Answer»

Question 4:

Classify the various types of Acids based on their sources.

Discussion

3676.	What are quantized energy states in hydrogen atom and schrodinger equation
Answer» What are quantized energy states in hydrogen atom and schrodinger equation

Discussion

3677.	A catalyst:(i) increases the average kinetic energy of reacting molecules(ii) decrease the activation energy(iii) alters the reaction mechanism(iv) increases the frequency of collisions of reacting species.The true statements are:
Answer» A catalyst: (i) increases the average kinetic energy of reacting molecules (ii) decrease the activation energy (iii) alters the reaction mechanism (iv) increases the frequency of collisions of reacting species. The true statements are:

Discussion

3678.	5 1000 ml of a sample of water contain 1mg cacl2 and 1mg mgcl2. The total hardness in terms of caco3 is?
Answer» 5 1000 ml of a sample of water contain 1mg cacl2 and 1mg mgcl2. The total hardness in terms of caco3 is?

Discussion

3679.	Which of the following is correct about suspensions?
Answer» Which of the following is correct about suspensions?

Discussion

3680.	The random movement of colloidal particles is called ___ movement.
Answer» The random movement of colloidal particles is called ___ movement.

Discussion

3681.	The ratio of Fe+3 and Fe+2 in Fe0.9S1.0 is
Answer» The ratio of Fe+3 and Fe+2 in Fe0.9S1.0 is

Discussion

3682.	(a) What are isotopes? Explain by giving an example.(b) Give one similarity and one difference between a pair of isotopes.(c) Give the number of protons, neutrons, and electrons per atom in the two isotopes of chlorine Cl1735 and Cl1737.
Answer» (a) What are isotopes? Explain by giving an example. (b) Give one similarity and one difference between a pair of isotopes. (c) Give the number of protons, neutrons, and electrons per atom in the two isotopes of chlorine ${}_{17}^{35}{Cl}$ and ${}_{17}^{37}{Cl}$ .

Discussion

3683.	For the reaction, 23A+25B→37C, the differential rate equation can be written as:
Answer» For the reaction, $\frac{2}{3} A + \frac{2}{5} B \to \frac{3}{7} C$ , the differential rate equation can be written as:

Discussion

3684.	A metal nitrate gives NO2 and O2 on simple heating. This metal nitrate is:
Answer» A metal nitrate gives ${NO}_{2} and O_{2}$ on simple heating. This metal nitrate is:

Discussion

3685.	Hydrochloric acid is used to purify
Answer» Hydrochloric acid is used to purify

Discussion

3686.	Which of the following gas is produced when potassium bicarbonate reacts with sulphuric acid?
Answer» Which of the following gas is produced when potassium bicarbonate reacts with sulphuric acid?

Discussion

3687.	Half life period of a first order reaction is 10 min. Starting with initial concentration 12M, the rate after 20 min is
Answer» Half life period of a first order reaction is 10 min. Starting with initial concentration 12M, the rate after 20 min is

Discussion

3688.	name one metal which is poor conductor of heat?
Answer» name one metal which is poor conductor of heat?

Discussion

3689.	12.In alkaline solution KMnO reacts as follows42KMnO4+ 2KOH2K2MnO4 H20OTherefore, its eq. wt. will be(2) 52.7(1) 31.6(4) 158.0(3) 79.0
Answer» 12.In alkaline solution KMnO reacts as follows42KMnO4+ 2KOH2K2MnO4 H20OTherefore, its eq. wt. will be(2) 52.7(1) 31.6(4) 158.0(3) 79.0

Discussion

3690.	Fresh milk has a pH of 6. How do you think the pH will change as the milk turns into curd? Explain your answer.
Answer» Fresh milk has a pH of 6. How do you think the pH will change as the milk turns into curd? Explain your answer.

Discussion

3691.	Definition of chain reaction
Answer» Definition of chain reaction

Discussion

3692.	Thermal neutrons can cause fission in1.U 2352.U 2383. Pu 2384.Th 232
Answer» Thermal neutrons can cause fission in 1.U 235 2.U 238 3. Pu 238 4.Th 232

Discussion

3693.	Question 7.3Write the balanced chemical equation for the following reaction:Aluminium + Copper chloride → Aluminium chloride + Copper
Answer» Question 7.3 Write the balanced chemical equation for the following reaction: Aluminium + Copper chloride $\to$ Aluminium chloride + Copper

Discussion

3694.	For a liquid and glass interface , if adhesive force is greater than cohesive force , then the angle of contact is 1) greater than 90 2)equal to 90 3)less than 90 4) both 1 and
Answer» For a liquid and glass interface , if adhesive force is greater than cohesive force , then the angle of contact is 1) greater than 90 2)equal to 90 3)less than 90 4) both 1 and

Discussion

3695.	In an oxide of carbon there is 52.94% carbon and 47.06% oxygen . find the empirical formula of the compound?
Answer» In an oxide of carbon there is 52.94% carbon and 47.06% oxygen . find the empirical formula of the compound?

Discussion

3696.	Metals generally do not react with which of the following acid?
Answer» Metals generally do not react with which of the following acid?

Discussion

3697.	21. Amongst the following what would be the correct order of bond angle and why?? OH2,SH2,SeH2,TlH2
Answer» 21. Amongst the following what would be the correct order of bond angle and why?? OH2,SH2,SeH2,TlH2

Discussion

3698.	Statement-1 : For PCℓ5 Image not present PCl3 + Cl2 reaction, equilibrium constant increases on increasing temperature.Statement-2 : Rate of forward reaction increases and rate of backward reaction decreases on increasing temperature.(1)Statement-1 is true, statement-2 is true and statement-2 is correct explanation of statement-1.(2)Statement-1 is true, statement-2 is true and statement-2 is not the correct explanation for statement-1.(3)Statement-1 is true, statement-2 is false.(4)Statement-1 is false, statement-2 is true.
Answer» Statement-1 : For PCℓ5 Image not present PCl3 + Cl2 reaction, equilibrium constant increases on increasing temperature. Statement-2 : Rate of forward reaction increases and rate of backward reaction decreases on increasing temperature. (1) Statement-1 is true, statement-2 is true and statement-2 is correct explanation of statement-1. (2) Statement-1 is true, statement-2 is true and statement-2 is not the correct explanation for statement-1. (3) Statement-1 is true, statement-2 is false. (4) Statement-1 is false, statement-2 is true.

Discussion

3699.	What is the significance of the formula of a substance? The molecular formula of glucose is C6H12O6. Calculate its molecular mass. (Atomic masses: C = 12 u; H = 1 u; O = 16 u)
Answer» What is the significance of the formula of a substance? The molecular formula of glucose is C₆H₁₂O₆. Calculate its molecular mass. (Atomic masses: C = 12 u; H = 1 u; O = 16 u)

Discussion

3700.	46. Is polymerisation a type of combination reaction?
Answer» 46. Is polymerisation a type of combination reaction?

Discussion

Explore topic-wise InterviewSolutions in .

Grapes when kept in a thick sugar solution ____________________.

The technology used in assessing the oil reservoir is:

Thermocol is produced from whichmaterial?

The anomalous expansion of water is a boon to which of the given habitats in cold regions?

If pH of solution X is 6 and pH of solution Y is 13. What is formed when X and Y are reacted with each other?

. A given solution of NaOH contains 2.00 g of NaOH per litre of solution. Calculate the molarityof this solution.

The metal which melts in hand is

Explain hydro power plant in detail.

Which synthetic fibre was first discovered?

What of the following is not the characteristic property of a supersaturated solutions?

Which of the follownig is/are examples of polar molecular solids?

How does Xe form bonds ( as in XeFO4) despite having complete octet and no covalency?

What is slow combustion?

State the type of the underlined phrase in the sentence. Mario and Julio were the sons of Ricardo and Julia.

13. The force between two point charges in air is100 N. If the distance between them is increasedby 50%, then the force between two charges willbe nearly equal to(1) 50 N(3) 100 N(2) 56 N(4) 44 N

Select the equation for [B] at any time t in the following reaction. Let the initial concentration of A be \([A]_0\) and B and C be 0.

What do you understand by the term electroplating?

The properties of _________ are ductility and mallebility.__________ are poor conductors of heat and electricity.__________ has intermediate properties.

Addition of catalyst at 300K increases the rate by a factor of 36.By how many kJ activation energy of catalysed pathway is less than the activation energy of original pathway?(\log6=0.78 R=8.3) 1.6kJ 2.9kJ 3.10kJ 4.12kJ

The energy of an electron in Bohr's orbit of hydrogen atom is -13.6eV. The total electronic energy of a hypothetical' He atom in which there is no electron-electron repulsion is (1) 27.2 eV (2) -27.2eV (3) -108.8eV (4) 108eV

Which of the following is a metal?

What are water pollutants? [2 MARKS]

Question 4:Classify the various types of Acids based on their sources.

What are quantized energy states in hydrogen atom and schrodinger equation

A catalyst:(i) increases the average kinetic energy of reacting molecules(ii) decrease the activation energy(iii) alters the reaction mechanism(iv) increases the frequency of collisions of reacting species.The true statements are:

5 1000 ml of a sample of water contain 1mg cacl2 and 1mg mgcl2. The total hardness in terms of caco3 is?

Which of the following is correct about suspensions?

The random movement of colloidal particles is called ___ movement.

The ratio of Fe+3 and Fe+2 in Fe0.9S1.0 is

(a) What are isotopes? Explain by giving an example.(b) Give one similarity and one difference between a pair of isotopes.(c) Give the number of protons, neutrons, and electrons per atom in the two isotopes of chlorine Cl1735 and Cl1737.

For the reaction, 23A+25B→37C, the differential rate equation can be written as:

A metal nitrate gives NO2 and O2 on simple heating. This metal nitrate is:

Hydrochloric acid is used to purify

Which of the following gas is produced when potassium bicarbonate reacts with sulphuric acid?

Half life period of a first order reaction is 10 min. Starting with initial concentration 12M, the rate after 20 min is

name one metal which is poor conductor of heat?

12.In alkaline solution KMnO reacts as follows42KMnO4+ 2KOH2K2MnO4 H20OTherefore, its eq. wt. will be(2) 52.7(1) 31.6(4) 158.0(3) 79.0

Fresh milk has a pH of 6. How do you think the pH will change as the milk turns into curd? Explain your answer.

Definition of chain reaction

Thermal neutrons can cause fission in1.U 2352.U 2383. Pu 2384.Th 232

Question 7.3Write the balanced chemical equation for the following reaction:Aluminium + Copper chloride → Aluminium chloride + Copper

For a liquid and glass interface , if adhesive force is greater than cohesive force , then the angle of contact is 1) greater than 90 2)equal to 90 3)less than 90 4) both 1 and

In an oxide of carbon there is 52.94% carbon and 47.06% oxygen . find the empirical formula of the compound?

Metals generally do not react with which of the following acid?

21. Amongst the following what would be the correct order of bond angle and why?? OH2,SH2,SeH2,TlH2

What is the significance of the formula of a substance? The molecular formula of glucose is C6H12O6. Calculate its molecular mass. (Atomic masses: C = 12 u; H = 1 u; O = 16 u)

46. Is polymerisation a type of combination reaction?

The properties of _ are ductility and mallebility. are poor conductors of heat and electricity.____ has intermediate properties.