15280 + Interview Questions in Chemistry Page 100 InterviewSolution

4951.	What are s-block elements?Write their general electronic configuration?
Answer» What are s-block elements?Write their general electronic configuration?

Discussion

4952.	The density of a gas at S.T.P. is 1.40 grams per litre. The molecular weight of the gas is:
Answer» The density of a gas at S.T.P. is $1.40 g r a m s$ per litre. The molecular weight of the gas is:

Discussion

4953.	Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equations for the reactions from which the following gases are obtained, using dilute sulphuric acid as one of the reactants:(i) Hydrogen(ii) Carbon dioxide(iii) Sulphur dioxide
Answer» Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equations for the reactions from which the following gases are obtained, using dilute sulphuric acid as one of the reactants: (i) Hydrogen (ii) Carbon dioxide (iii) Sulphur dioxide

Discussion

4954.	Give examples of the use of sulphuric acid as(i) an electrolyte in everyday use,(ii) non-volatile acid,(iii) an oxidizing agent.
Answer» Give examples of the use of sulphuric acid as (i) an electrolyte in everyday use, (ii) non-volatile acid, (iii) an oxidizing agent.

Discussion

4955.	how Fe3O4 is formed, oxygen doesn't have the valency 3 then how it's Fe3O4
Answer» how Fe3O4 is formed, oxygen doesn't have the valency 3 then how it's Fe3O4

Discussion

4956.	A sample of oxygen gas at STP occupies 2.8 L. The number of oxygen atoms in the sample is
Answer» A sample of oxygen gas at STP occupies 2.8 L. The number of oxygen atoms in the sample is

Discussion

4957.	What is the commercial name of calcium sulphate hemihydrate ?
Answer» What is the commercial name of calcium sulphate hemihydrate ?

Discussion

4958.	41. Balmer series limit of a hydrogen like atom is equal to the series limit of Lyman series for hydrogen atom . The atomic number of hydrogen like atom is
Answer» 41. Balmer series limit of a hydrogen like atom is equal to the series limit of Lyman series for hydrogen atom . The atomic number of hydrogen like atom is

Discussion

4959.	A student was given a solution to find its pH. His teacher declared his recorded pH as wrong. Student explained to his teacher, all the steps done by him while finding pH of sample. Mark the step taken by student in which he committed mistake. (a) collection of apparatus. (b) clearing of all apparatus (c) making pH paper wet and then dip it in sample. (d) recording observation.
Answer» A student was given a solution to find its pH. His teacher declared his recorded pH as wrong. Student explained to his teacher, all the steps done by him while finding pH of sample. Mark the step taken by student in which he committed mistake. (a) collection of apparatus. (b) clearing of all apparatus (c) making pH paper wet and then dip it in sample. (d) recording observation.

Discussion

4960.	How many grams of cobalt metal will be deposited when a solution of cobalt(II) chloride is electrolyzed with a current of 10 amperes for 109 minutes? (1 Faraday=96,500 C;Atomic mass of Co = 59 u)
Answer» How many grams of cobalt metal will be deposited when a solution of cobalt(II) chloride is electrolyzed with a current of $10$ amperes for $109$ minutes? $(1 Faraday = 96, 500 C; Atomic mass of Co = 59 u)$

Discussion

4961.	Where can we find the use of HCl?
Answer» Where can we find the use of HCl?

Discussion

4962.	26. What is difference between threshold energy and activation energy?
Answer» 26. What is difference between threshold energy and activation energy?

Discussion

4963.	In a laboratory, which is the other compound that is used along with sulphuric acid to produce nitric acid?
Answer» In a laboratory, which is the other compound that is used along with sulphuric acid to produce nitric acid?

Discussion

4964.	What is the difference between displacement and double displacement reactions? Write equations for these reactions.
Answer» What is the difference between displacement and double displacement reactions? Write equations for these reactions.

Discussion

4965.	0.) One kg of a diatomic gas is at pressure of 8 x 104N/m2. The density of the gas is 4 kg/m3. Theenergy of the gas due to its thermal motion will be(1) 3 x 104 J(3) 6 x 104 J(2) 5 x 104 J(4) 7 x 104 J
Answer» 0.) One kg of a diatomic gas is at pressure of 8 x 104N/m2. The density of the gas is 4 kg/m3. Theenergy of the gas due to its thermal motion will be(1) 3 x 104 J(3) 6 x 104 J(2) 5 x 104 J(4) 7 x 104 J

Discussion

4966.	What was the contribution of chemist Wohler in organic chemistry?
Answer» What was the contribution of chemist Wohler in organic chemistry?

Discussion

4967.	Question 13 Which of the following hydrocarbons undergo addition reactions: C2H6,C3H8,C3H6,C2H2 and CH4?
Answer» Question 13 Which of the following hydrocarbons undergo addition reactions: $C_{2} H_{6}, C_{3} H_{8}, C_{3} H_{6}, C_{2} H_{2}$ and ${CH}_{4}$ ?

Discussion

4968.	On increasing temperature from 200 K to 220 K rate of reaction A increases 3 times and rate of reaction B increases 9 times then correct relationship between activation energy of A and B--1. Ea = 3Eb2.3Ea = Eb3.Eb = 2Ea4. Ea = 2 Eb
Answer» On increasing temperature from 200 K to 220 K rate of reaction A increases 3 times and rate of reaction B increases 9 times then correct relationship between activation energy of A and B-- 1. Ea = 3Eb 2.3Ea = Eb 3.Eb = 2Ea 4. Ea = 2 Eb

Discussion

4969.	Both soap and detergent are some type of salts. What is the difference between them? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water? List two problems that arise due to the use of detergents instead of soaps.
Answer» Both soap and detergent are some type of salts. What is the difference between them? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water? List two problems that arise due to the use of detergents instead of soaps.

Discussion

4970.	The reagent used for testing ammonia is:
Answer» The reagent used for testing ammonia is:

Discussion

4971.	What is the name of the process for industrial preparation of sulphuric acid?
Answer» What is the name of the process for industrial preparation of sulphuric acid?

Discussion

4972.	60 State ionic reactions taking place at the cathode and anode during the process of electrolytic refining of copper.
Answer» 60 State ionic reactions taking place at the cathode and anode during the process of electrolytic refining of copper.

Discussion

4973.	An ideal solution was obtained by mixing methanol and ethanol. if the partial vapour pressure of methanol and ethanol are 2.619 kPa and 4.556kPa respectively, the composition of the vapour (in term of mole fraction) will be (a) 0.635 methanol,0.365 ethanol (b) 0.365 methanol,0.635 ethanol (c) 0.574 methanol,0.326 ethanol (d) 0.173 methanol,0.827 ethanol
Answer» An ideal solution was obtained by mixing methanol and ethanol. if the partial vapour pressure of methanol and ethanol are 2.619 kPa and 4.556kPa respectively, the composition of the vapour (in term of mole fraction) will be (a) 0.635 methanol,0.365 ethanol (b) 0.365 methanol,0.635 ethanol (c) 0.574 methanol,0.326 ethanol (d) 0.173 methanol,0.827 ethanol

Discussion

4974.	Which of the following is position and chain isomer of CH3CH2COCH2CH3?
Answer» Which of the following is position and chain isomer of ${CH}_{3} {CH}_{2} {COCH}_{2} {CH}_{3}$ ?

Discussion

4975.	20 The temperature of 15 ml of a strong acid increases by 2degree Celsius when 15 ml of a strong base is added to it. If 5 ml of each are mixed, temperature should increase by (1) 0.6C (2) 0.3C (3) 2C (4) 6C
Answer» 20 The temperature of 15 ml of a strong acid increases by 2degree Celsius when 15 ml of a strong base is added to it. If 5 ml of each are mixed, temperature should increase by (1) 0.6C (2) 0.3C (3) 2C (4) 6C

Discussion

4976.	27. A solution x contains 30 mole percenter of A and is equilibrium with it's vapour that contains 40 mole percent of B the ratio of vapour pressure of pureA and B is?
Answer» 27. A solution x contains 30 mole percenter of A and is equilibrium with it's vapour that contains 40 mole percent of B the ratio of vapour pressure of pureA and B is?

Discussion

4977.	ntIf the difference between nth and n+1th Bohr radii of H atom is =to its n-1th Bohr radius.the value of n??n
Answer» ntIf the difference between nth and n+1th Bohr radii of H atom is =to its n-1th Bohr radius.the value of n??n

Discussion

4978.	Which physical quantity is expressed in Tm/A?
Answer» Which physical quantity is expressed in Tm/A?

Discussion

4979.	Question 3 (e) Which element has twice as many electrons in its second shell as in its first shell?
Answer» Question 3 (e) Which element has twice as many electrons in its second shell as in its first shell?

Discussion

4980.	Establish the relationship between vapour density and molecular mass of a gas by applying Avogadro’s law.
Answer» Establish the relationship between vapour density and molecular mass of a gas by applying Avogadro’s law.

Discussion

4981.	Iodine is stable in its+5 oxidation state then why the reduction of DMP reagent takes place?
Answer» Iodine is stable in its+5 oxidation state then why the reduction of DMP reagent takes place?

Discussion

4982.	Which of the following statement is correct?
Answer» Which of the following statement is correct?

Discussion

4983.	Why the suspension of slaked lime formed is decanted after it gets cooled overnight when walls are to be whitewashed.
Answer» Why the suspension of slaked lime formed is decanted after it gets cooled overnight when walls are to be whitewashed.

Discussion

4984.	Which of the follo ing compounds exhibits, stereoisomerism?
Answer» Which of the follo ing compounds exhibits, stereoisomerism?

Discussion

4985.	Are parasites heterotrophs?
Answer» Are parasites heterotrophs?

Discussion

4986.	Answer the following.How do biodegradable and non biodegradable waste cause land pollution?
Answer» Answer the following. How do biodegradable and non biodegradable waste cause land pollution?

4986.

Answer the following.How do biodegradable and non biodegradable waste cause land pollution?

Answer»

Answer the following.

How do biodegradable and non biodegradable waste cause land pollution?

Discussion

4987.	(ch3)2ch-(ch2)2-c(ch3)3 draw the bond like structur
Answer» (ch3)2ch-(ch2)2-c(ch3)3 draw the bond like structur

Discussion

4988.	Assertion (A): Organism uses up to 90% of its food energy for its life processes.Reason (R): 10% of energy goes into new body cells and will be available to the next animal when it gets eaten.
Answer» Assertion (A): Organism uses up to 90% of its food energy for its life processes. Reason (R): 10% of energy goes into new body cells and will be available to the next animal when it gets eaten.

Discussion

4989.	what is the mixture of syngas
Answer» what is the mixture of syngas

Discussion

4990.	Classify the following substances under three headings: (a) strong electrolytes (b) weak electrolytes (c) non-electrolytes.Acetic acid, ammonium chloride, ammonium hydroxide, carbon tetrachloride, dilute hydrochloric acid, sodium acetate, dilute sulphuric acid.
Answer» Classify the following substances under three headings: (a) strong electrolytes (b) weak electrolytes (c) non-electrolytes. Acetic acid, ammonium chloride, ammonium hydroxide, carbon tetrachloride, dilute hydrochloric acid, sodium acetate, dilute sulphuric acid.

Discussion

4991.	What happens to the polarity of CO Bond in an alcohol(R-OH) and an ether(ROR) as the size of R(alkyl) group increases?
Answer» What happens to the polarity of CO Bond in an alcohol(R-OH) and an ether(ROR) as the size of R(alkyl) group increases?

Discussion

4992.	What is activation energy
Answer» What is activation energy

Discussion

4993.	Tyndall effect is the scattering of light by _________.
Answer» Tyndall effect is the scattering of light by _________.

Discussion

4994.	Name the monomer of teflon. Write its molecular formula.
Answer» Name the monomer of teflon. Write its molecular formula.

Discussion

4995.	Which mixture of gas is used for artificial respiration in the medical field?
Answer» Which mixture of gas is used for artificial respiration in the medical field?

Discussion

4996.	Which of the following is/are example(s) of combination reaction?
Answer» Which of the following is/are example(s) of combination reaction?

Discussion

4997.	The metal which can be extracted from pyrolusite ore is: (a) mercury (b) manganese (c) calcination (d) sulphonation
Answer» The metal which can be extracted from pyrolusite ore is: (a) mercury (b) manganese (c) calcination (d) sulphonation

Discussion

4998.	10g of impure sample of CaCO3 requires 4.38g HCl for complete neutralisation . The percentage purity of the sample is ?
Answer» 10g of impure sample of CaCO3 requires 4.38g HCl for complete neutralisation . The percentage purity of the sample is ?

Discussion

4999.	26. A solution containing 0.0012 mol of CrCl3.6H2O was passed through a cation exchange resin and the acid coming out of the resin required 28.5 ml of 0.125 M NaOH. the formula of complex entity is?
Answer» 26. A solution containing 0.0012 mol of CrCl3.6H2O was passed through a cation exchange resin and the acid coming out of the resin required 28.5 ml of 0.125 M NaOH. the formula of complex entity is?

Discussion

5000.	what is the hybridisation and shap of Sb(Ph)5
Answer» what is the hybridisation and shap of Sb(Ph)5

Discussion

Explore topic-wise InterviewSolutions in .

What are s-block elements?Write their general electronic configuration?

The density of a gas at S.T.P. is 1.40 grams per litre. The molecular weight of the gas is:

Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equations for the reactions from which the following gases are obtained, using dilute sulphuric acid as one of the reactants:(i) Hydrogen(ii) Carbon dioxide(iii) Sulphur dioxide

Give examples of the use of sulphuric acid as(i) an electrolyte in everyday use,(ii) non-volatile acid,(iii) an oxidizing agent.

how Fe3O4 is formed, oxygen doesn't have the valency 3 then how it's Fe3O4

A sample of oxygen gas at STP occupies 2.8 L. The number of oxygen atoms in the sample is

What is the commercial name of calcium sulphate hemihydrate ?

41. Balmer series limit of a hydrogen like atom is equal to the series limit of Lyman series for hydrogen atom . The atomic number of hydrogen like atom is

How many grams of cobalt metal will be deposited when a solution of cobalt(II) chloride is electrolyzed with a current of 10 amperes for 109 minutes? (1 Faraday=96,500 C;Atomic mass of Co = 59 u)

Where can we find the use of HCl?

26. What is difference between threshold energy and activation energy?

In a laboratory, which is the other compound that is used along with sulphuric acid to produce nitric acid?

What is the difference between displacement and double displacement reactions? Write equations for these reactions.

0.) One kg of a diatomic gas is at pressure of 8 x 104N/m2. The density of the gas is 4 kg/m3. Theenergy of the gas due to its thermal motion will be(1) 3 x 104 J(3) 6 x 104 J(2) 5 x 104 J(4) 7 x 104 J

What was the contribution of chemist Wohler in organic chemistry?

Question 13 Which of the following hydrocarbons undergo addition reactions: C2H6,C3H8,C3H6,C2H2 and CH4?

On increasing temperature from 200 K to 220 K rate of reaction A increases 3 times and rate of reaction B increases 9 times then correct relationship between activation energy of A and B--1. Ea = 3Eb2.3Ea = Eb3.Eb = 2Ea4. Ea = 2 Eb

Both soap and detergent are some type of salts. What is the difference between them? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water? List two problems that arise due to the use of detergents instead of soaps.

The reagent used for testing ammonia is:

What is the name of the process for industrial preparation of sulphuric acid?

60 State ionic reactions taking place at the cathode and anode during the process of electrolytic refining of copper.

Which of the following is position and chain isomer of CH3CH2COCH2CH3?

20 The temperature of 15 ml of a strong acid increases by 2degree Celsius when 15 ml of a strong base is added to it. If 5 ml of each are mixed, temperature should increase by (1) 0.6C (2) 0.3C (3) 2C (4) 6C

27. A solution x contains 30 mole percenter of A and is equilibrium with it's vapour that contains 40 mole percent of B the ratio of vapour pressure of pureA and B is?

ntIf the difference between nth and n+1th Bohr radii of H atom is =to its n-1th Bohr radius.the value of n??n

Which physical quantity is expressed in Tm/A?

Question 3 (e) Which element has twice as many electrons in its second shell as in its first shell?

Establish the relationship between vapour density and molecular mass of a gas by applying Avogadro’s law.

Iodine is stable in its+5 oxidation state then why the reduction of DMP reagent takes place?

Which of the following statement is correct?

Why the suspension of slaked lime formed is decanted after it gets cooled overnight when walls are to be whitewashed.

Which of the follo ing compounds exhibits, stereoisomerism?

Are parasites heterotrophs?

Answer the following.How do biodegradable and non biodegradable waste cause land pollution?

(ch3)2ch-(ch2)2-c(ch3)3 draw the bond like structur

Assertion (A): Organism uses up to 90% of its food energy for its life processes.Reason (R): 10% of energy goes into new body cells and will be available to the next animal when it gets eaten.

what is the mixture of syngas

Classify the following substances under three headings: (a) strong electrolytes (b) weak electrolytes (c) non-electrolytes.Acetic acid, ammonium chloride, ammonium hydroxide, carbon tetrachloride, dilute hydrochloric acid, sodium acetate, dilute sulphuric acid.

What happens to the polarity of CO Bond in an alcohol(R-OH) and an ether(ROR) as the size of R(alkyl) group increases?

What is activation energy

Tyndall effect is the scattering of light by _________.

Name the monomer of teflon. Write its molecular formula.

Which mixture of gas is used for artificial respiration in the medical field?

Which of the following is/are example(s) of combination reaction?

The metal which can be extracted from pyrolusite ore is: (a) mercury (b) manganese (c) calcination (d) sulphonation

10g of impure sample of CaCO3 requires 4.38g HCl for complete neutralisation . The percentage purity of the sample is ?

26. A solution containing 0.0012 mol of CrCl​3.6H2O was passed through a cation exchange resin and the acid coming out of the resin required 28.5 ml of 0.125 M NaOH. the formula of complex entity is?

what is the hybridisation and shap of Sb(Ph)5

26. A solution containing 0.0012 mol of CrCl3.6H2O was passed through a cation exchange resin and the acid coming out of the resin required 28.5 ml of 0.125 M NaOH. the formula of complex entity is?