15280 + Interview Questions in Chemistry Page 196 InterviewSolution

9751.	The second ionization potentials in electron volts of oxygen and fluorine atoms are respectively given by?
Answer» The second ionization potentials in electron volts of oxygen and fluorine atoms are respectively given by?

Discussion

9752.	A balloon filled with element X is used in meteorological balloons to study weather conditions. Name the element X.
Answer» A balloon filled with element X is used in meteorological balloons to study weather conditions. Name the element X.

Discussion

9753.	1.What is electropositive?what do you think will happen if a highly electropositive element bonded to another element of high electropositive 2.Show the bonding between the constituent atoms of methane(ZnS) 3. Show the bonding between the constituent atoms of methane(CH4) 4.What are Arrhenius acids? 5.Pure water does not conduct electricity.Why does adding a few drops of an acid to the pure water make it conducting? 6.Write the chemical equation to represent the ionic dissociation of sodium hydroxide (NaOH) in an aqueous medium. 7.What is pH and what is it's relation with pOH? 8.Name the acids found in the following natural chemical substance:- Ant stings- Vinegar- Curd-
Answer» 1.What is electropositive?what do you think will happen if a highly electropositive element bonded to another element of high electropositive 2.Show the bonding between the constituent atoms of methane(ZnS) 3. Show the bonding between the constituent atoms of methane(CH4) 4.What are Arrhenius acids? 5.Pure water does not conduct electricity.Why does adding a few drops of an acid to the pure water make it conducting? 6.Write the chemical equation to represent the ionic dissociation of sodium hydroxide (NaOH) in an aqueous medium. 7.What is pH and what is it's relation with pOH? 8.Name the acids found in the following natural chemical substance:- Ant stings- Vinegar- Curd-

9753.

1.What is electropositive?what do you think will happen if a highly electropositive element bonded to another element of high electropositive 2.Show the bonding between the constituent atoms of methane(ZnS) 3. Show the bonding between the constituent atoms of methane(CH4) 4.What are Arrhenius acids? 5.Pure water does not conduct electricity.Why does adding a few drops of an acid to the pure water make it conducting? 6.Write the chemical equation to represent the ionic dissociation of sodium hydroxide (NaOH) in an aqueous medium. 7.What is pH and what is it's relation with pOH? 8.Name the acids found in the following natural chemical substance:- Ant stings- Vinegar- Curd-

Answer»

1.What is electropositive?what do you think will happen if a highly electropositive element bonded to another element of high electropositive

2.Show the bonding between the constituent atoms of methane(ZnS)

3. Show the bonding between the constituent atoms of methane(CH4)

4.What are Arrhenius acids?

5.Pure water does not conduct electricity.Why does adding a few drops of an acid to the pure water make it conducting?

6.Write the chemical equation to represent the ionic dissociation of sodium hydroxide (NaOH) in an aqueous medium.

7.What is pH and what is it's relation with pOH?

8.Name the acids found in the following natural chemical substance:-

Ant stings-

Vinegar-

Curd-

Discussion

9754.	What is the decreasing order of the stabilities of the following free radicals?
Answer» What is the decreasing order of the stabilities of the following free radicals?

9754.

What is the decreasing order of the stabilities of the following free radicals?

Answer»

What is the decreasing order of the stabilities of the following free radicals?

Discussion

9755.

You are given some compounds with their pH values. Arrange them in increasing order of acidity. Compound name pH value of compound A 6 B 1 C 5 D 3

Answer»

You are given some compounds with their pH values. Arrange them in increasing order of acidity.

Compound name	pH value of compound
A	6
B	1
C	5
D	3

Discussion

9756.	Which subshell is common to all shells ?
Answer» Which subshell is common to all shells ?

Discussion

9757.	Why does a potential difference develop between the copper and zinc electrodes in a voltaic cell?
Answer» Why does a potential difference develop between the copper and zinc electrodes in a voltaic cell?

Discussion

9758.	Is formation of silver chloride by the combination reaction of silver and chlorine a endothermic reaction?
Answer» Is formation of silver chloride by the combination reaction of silver and chlorine a endothermic reaction?

Discussion

9759.	Are these the correct equations is this the correct equation for the formation of NH4 a bronsted - lowry acid from a brobdted lowry base 1. 2NH3 +H2 → 2NH4 Below is the reaction between an acid and a base found in fertilizers 2. NH4OH + H2SO4 → NH4SO4 + H2O
Answer» Are these the correct equations is this the correct equation for the formation of NH4 a bronsted - lowry acid from a brobdted lowry base 1. 2NH3 +H2 → 2NH4 Below is the reaction between an acid and a base found in fertilizers 2. NH4OH + H2SO4 → NH4SO4 + H2O

Discussion

9760.	What does a negative e.m.f. for a cell indicate ?
Answer» What does a negative e.m.f. for a cell indicate ?

Discussion

9761.	Question 43 A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.
Answer» Question 43 A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.

Discussion

9762.	We do not clean ponds and lakes but an aquarium needs to be cleaned regularly.Explain.
Answer» We do not clean ponds and lakes but an aquarium needs to be cleaned regularly.Explain.

Discussion

9763.	Baking soda on thermal ___ gives sodium carbonate, water and carbon dioxide.
Answer» Baking soda on thermal ___ gives sodium carbonate, water and carbon dioxide.

Discussion

9764.	Choose the correct option from the following:
Answer» Choose the correct option from the following:

Discussion

9765.	Which of the following is the structure for pentanol?
Answer» Which of the following is the structure for pentanol?

Discussion

9766.	How many elements were known when Mendeleev started his work on his periodic table?
Answer» How many elements were known when Mendeleev started his work on his periodic table?

Discussion

9767.	In which of the following species is energy released when an electron is added?
Answer» In which of the following species is energy released when an electron is added?

Discussion

9768.	Choose the correct option:
Answer» Choose the correct option:

Discussion

9769.	Metals in their pure state, have a shining surface. What is the property that makes metals shine?
Answer» Metals in their pure state, have a shining surface. What is the property that makes metals shine?

Discussion

9770.	Which of the following statement is correct regarding the drawbacks of raw rubber [AIIMS 2001]
Answer» Which of the following statement is correct regarding the drawbacks of raw rubber [AIIMS 2001]

Discussion

9771.	Question 32 Match the important chemicals given in Column I with the chemical formulae given in Column II.
Answer» Question 32 Match the important chemicals given in Column I with the chemical formulae given in Column II.

Discussion

9772.	A heat engine executes one complete cycle. The change in entropy of the engine (just the engine, not the external thermal reservoirs) is:
Answer» A heat engine executes one complete cycle. The change in entropy of the engine (just the engine, not the external thermal reservoirs) is:

Discussion

9773.	Why is ZnO called an amphoteric oxide? Name another amphoteric oxide?
Answer» Why is ZnO called an amphoteric oxide? Name another amphoteric oxide?

Discussion

9774.	Write a note on any five of the common alloys?
Answer» Write a note on any five of the common alloys?

Discussion

9775.	Which of the following is not a strong acid?
Answer» Which of the following is not a strong acid?

Discussion

9776.	Why are certain compounds called hydrocarbons? Write the general formula for homologous series of alkanes, alkenes and alkynes and also draw the structure of the first member of each series. Write the name of the reaction that converts alkenes into alkanes and also write a chemical equation to show the necessary conditions for the reaction to occur.
Answer» Why are certain compounds called hydrocarbons? Write the general formula for homologous series of alkanes, alkenes and alkynes and also draw the structure of the first member of each series. Write the name of the reaction that converts alkenes into alkanes and also write a chemical equation to show the necessary conditions for the reaction to occur.

Discussion

9777.	Name one property which is characteristic of (a) metals, and (b) non-metals.
Answer» Name one property which is characteristic of (a) metals, and (b) non-metals.

Discussion

9778.	Explain the following types of chemical reactions giving two examples for the each of them : (a) combination reaction (b) decomposition reaction (c) displacement reaction (d) double displacement reaction
Answer» Explain the following types of chemical reactions giving two examples for the each of them : (a) combination reaction (b) decomposition reaction (c) displacement reaction (d) double displacement reaction

9778.

Explain the following types of chemical reactions giving two examples for the each of them : (a) combination reaction (b) decomposition reaction (c) displacement reaction (d) double displacement reaction

Answer»

Explain the following types of chemical reactions giving two examples for the each of them :

(a) combination reaction

(b) decomposition reaction

(c) displacement reaction

(d) double displacement reaction

Discussion

9779.	The reaction CaCO3 → CaO + CO2 is a ______ reaction.
Answer» The reaction $C a {C O}_{3}$ $\to$ $C a O$ + ${C O}_{2}$ is a ______ reaction.

Discussion

9780.	An organic acid 'X' is a liquid which often freezes during winter time in cold countries. It has the molecular formula C2H4O2. On warming with ethanol in the presence of a few drops of sulphuric acid, a compound ‘Y’ with sweet smell is formed. (i) Identify X and Y. (ii) Write the chemical equation for the reaction involved.
Answer» An organic acid 'X' is a liquid which often freezes during winter time in cold countries. It has the molecular formula $C_{2} H_{4} O_{2}$ . On warming with ethanol in the presence of a few drops of sulphuric acid, a compound ‘Y’ with sweet smell is formed. (i) Identify X and Y. (ii) Write the chemical equation for the reaction involved.

Discussion

9781.	Which component is Y in the reaction given below? CH3−CH2−CH2OHAlkaline KMnO4+Heat−−−−−−−−−−−−−−−−−−→Or acidified K2Cr2O7+HeatY
Answer» Which component is $Y$ in the reaction given below? $C H_{3} - C H_{2} - C H_{2} O H A l k a l i n e K M n O_{4} + H e a t - ----------------- \to O r a c i d i f i e d K_{2} C r_{2} O_{7} + H e a t Y$

Discussion

9782.	Name the raw materials that are required for the manufacturing process of washing soda by solvay process. Describe the chemical reaction involved in this process
Answer» Name the raw materials that are required for the manufacturing process of washing soda by solvay process. Describe the chemical reaction involved in this process

Discussion

9783.	How is zinc extracted from its ore
Answer» How is zinc extracted from its ore

Discussion

9784.	in later middle ages, sulphuric acid was also known as ___
Answer» in later middle ages, sulphuric acid was also known as ___

Discussion

9785.	An alloy consists of 27½kg of copper and 2¾kg of tin. Find the ratio by weight of tin to the alloy.
Answer» An alloy consists of 27½kg of copper and 2¾kg of tin. Find the ratio by weight of tin to the alloy.

Discussion

9786.	What is the concept of tennins in plants?
Answer» What is the concept of tennins in plants?

Discussion

9787.	Why alkali metals are good reducing agents?
Answer» Why alkali metals are good reducing agents?

Discussion

9788.	The halogen which exists as solid at room temperature is ___ .
Answer» The halogen which exists as solid at room temperature is ___ .

Discussion

9789.	Oxide has a valency of 2 then why we are writing Lead oxide as Pbo not as Pb2o
Answer» Oxide has a valency of 2 then why we are writing Lead oxide as Pbo not as Pb2o

9789.

Oxide has a valency of 2 then why we are writing Lead oxide as Pbo not as Pb2o

Answer»

Oxide has a valency of 2 then why we are writing

Lead oxide as Pbo not as Pb2o

Discussion

9790.	Atoms of a substance which have the same atomic number but different mass numbers are
Answer» Atoms of a substance which have the same atomic number but different mass numbers are

Discussion

9791.	Match the physical state of elements or compounds to their symbols as used while writing chemical equations: Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water(solution with water)(D) (l)
Answer» Match the physical state of elements or compounds to their symbols as used while writing chemical equations: $\begin{matrix} P h y s i c a l S t a t e & S y m b o l 1. G a s & (A) (s) 2. S o l i d & (B) (g) 3. L i q u i d & (C) (a q) 4. D i s s o l v e d i n w a t e r (s o l u t i o n w i t h w a t e r) & (D) (l) \end{matrix}$

9791.

Match the physical state of elements or compounds to their symbols as used while writing chemical equations: Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water(solution with water)(D) (l)

Answer»

Match the physical state of elements or compounds to their symbols as used while writing chemical equations:

$\begin{matrix} P h y s i c a l S t a t e & S y m b o l 1. G a s & (A) (s) 2. S o l i d & (B) (g) 3. L i q u i d & (C) (a q) 4. D i s s o l v e d i n w a t e r (s o l u t i o n w i t h w a t e r) & (D) (l) \end{matrix}$

Discussion

9792.	Which of the following equipments are required in contact process?
Answer» Which of the following equipments are required in contact process?

Discussion

9793.	Explain Avogadro's law.
Answer» Explain Avogadro's law.

Discussion

9794.	What is an alloy? How do the properties of an alloy differ from its constituents?
Answer» What is an alloy? How do the properties of an alloy differ from its constituents?

Discussion

9795.	Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20 g of the crystals will be
Answer» Zinc sulphate contains $22.65 %$ of zinc and $43.9 %$ of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20 g of the crystals will be

Discussion

9796.	2Agcl splits into 2Ag+cl2 here why 2 is on the front for Ag and 2 is down for cl2 ?
Answer» 2Agcl splits into 2Ag+cl2 here why 2 is on the front for Ag and 2 is down for cl₂?

9796.

2Agcl splits into 2Ag+cl2 here why 2 is on the front for Ag and 2 is down for cl2 ?

Answer»

2Agcl splits into 2Ag+cl2

here why 2 is on the front for Ag and 2 is down for cl₂?

Discussion

9797.	A strip of copper is placed in four different colourless salt solutions. They are KNO3, AgNO3, Zn(NO3)2 Ca(NO3)2. Which one of the solution will finally turn blue?
Answer» A strip of copper is placed in four different colourless salt solutions. They are $K N O_{3}, A g N O_{3}, Z n (N O_{3})_{2} C a (N O_{3})_{2}$ . Which one of the solution will finally turn blue?

Discussion

9798.	A Lead-Acid Accumulator can be recharged by reversing the electrochemical reactions within the cell. How is it achieved?
Answer» A Lead-Acid Accumulator can be recharged by reversing the electrochemical reactions within the cell. How is it achieved?

Discussion

9799.	Which of the following is the correct order of ionization energy?
Answer» Which of the following is the correct order of ionization energy?

Discussion

9800.	What is the meaning of malleable?
Answer» What is the meaning of malleable?

Discussion

Explore topic-wise InterviewSolutions in .

The second ionization potentials in electron volts of oxygen and fluorine atoms are respectively given by?

A balloon filled with element X is used in meteorological balloons to study weather conditions. Name the element X.

What is the decreasing order of the stabilities of the following free radicals?

You are given some compounds with their pH values. Arrange them in increasing order of acidity. Compound name pH value of compound A 6 B 1 C 5 D 3

Which subshell is common to all shells ?

Why does a potential difference develop between the copper and zinc electrodes in a voltaic cell?

Is formation of silver chloride by the combination reaction of silver and chlorine a endothermic reaction?

Are these the correct equations is this the correct equation for the formation of NH4 a bronsted - lowry acid from a brobdted lowry base 1. 2NH3 +H2 → 2NH4 Below is the reaction between an acid and a base found in fertilizers 2. NH4OH + H2SO4 → NH4SO4 + H2O

What does a negative e.m.f. for a cell indicate ?

Question 43 A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.

We do not clean ponds and lakes but an aquarium needs to be cleaned regularly.Explain.

Baking soda on thermal ___ gives sodium carbonate, water and carbon dioxide.

Choose the correct option from the following:

Which of the following is the structure for pentanol?

How many elements were known when Mendeleev started his work on his periodic table?

In which of the following species is energy released when an electron is added?

Choose the correct option:

Metals in their pure state, have a shining surface. What is the property that makes metals shine?

Which of the following statement is correct regarding the drawbacks of raw rubber [AIIMS 2001]

Question 32 Match the important chemicals given in Column I with the chemical formulae given in Column II.

A heat engine executes one complete cycle. The change in entropy of the engine (just the engine, not the external thermal reservoirs) is:

Why is ZnO called an amphoteric oxide? Name another amphoteric oxide?

Write a note on any five of the common alloys?

Which of the following is not a strong acid?

Name one property which is characteristic of (a) metals, and (b) non-metals.

Explain the following types of chemical reactions giving two examples for the each of them : (a) combination reaction (b) decomposition reaction (c) displacement reaction (d) double displacement reaction

The reaction CaCO3 → CaO + CO2 is a ______ reaction.

Which component is Y in the reaction given below? CH3−CH2−CH2OHAlkaline KMnO4+Heat−−−−−−−−−−−−−−−−−−→Or acidified K2Cr2O7+HeatY

Name the raw materials that are required for the manufacturing process of washing soda by solvay process. Describe the chemical reaction involved in this process

How is zinc extracted from its ore

in later middle ages, sulphuric acid was also known as ___

An alloy consists of 27½kg of copper and 2¾kg of tin. Find the ratio by weight of tin to the alloy.

What is the concept of tennins in plants?

Why alkali metals are good reducing agents?

The halogen which exists as solid at room temperature is ___ .

Oxide has a valency of 2 then why we are writing Lead oxide as Pbo not as Pb2o

Atoms of a substance which have the same atomic number but different mass numbers are

Match the physical state of elements or compounds to their symbols as used while writing chemical equations: Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water(solution with water)(D) (l)

Which of the following equipments are required in contact process?

Explain Avogadro's law.

What is an alloy? How do the properties of an alloy differ from its constituents?

Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20 g of the crystals will be

2Agcl splits into 2Ag+cl2 here why 2 is on the front for Ag and 2 is down for cl2 ?

A strip of copper is placed in four different colourless salt solutions. They are KNO3, AgNO3, Zn(NO3)2 Ca(NO3)2. Which one of the solution will finally turn blue?

A Lead-Acid Accumulator can be recharged by reversing the electrochemical reactions within the cell. How is it achieved?

Which of the following is the correct order of ionization energy?

What is the meaning of malleable?