15280 + Interview Questions in Chemistry Page 155 InterviewSolution

7701.	Among the first four alkali metals in group l of the periodic table Li, Na, K, Rb the most electropositive metal is which one? Why?
Answer» Among the first four alkali metals in group l of the periodic table Li, Na, K, Rb the most electropositive metal is which one? Why?

Discussion

7702.	What is acid neutralization?
Answer» What is acid neutralization?

Discussion

7703.	What will be the product if so2 reacts with cl2 1 in presence of charcoal 2 in absence of charcoal
Answer» What will be the product if so2 reacts with cl2 1 in presence of charcoal 2 in absence of charcoal

Discussion

7704.	Find A and B from the following:CH3CH2OH+O2→A+B+Heat and Light
Answer» Find A and B from the following: $C H_{3} C H_{2} O H + O_{2} \to A + B + H e a t a n d L i g h t$

Discussion

7705.	Which element can be placed in the region marked by a question mark?
Answer» Which element can be placed in the region marked by a question mark?

Discussion

7706.	If 1 mole of carbon atoms weighs 12g. What is the mass (in grams ) of 1 atom of carbon?
Answer» If 1 mole of carbon atoms weighs 12g. What is the mass (in grams ) of 1 atom of carbon?

Discussion

7707.	Question 29 The first member of alkyne homologous series is (a) ethyne (b) ethene (c) propyne (d) methane
Answer» Question 29 The first member of alkyne homologous series is (a) ethyne (b) ethene (c) propyne (d) methane

Discussion

7708.	(a) Write an equation for the laboratory preparation of (i) an unsaturated hydrocarbon from calcium carbide. (ii) an alcohol from ethyl bromide. (b) What would you see, when ethyne is bubbled through a solution of bromine in carbon tetrachloride ? (c) Name the addition product formed between ethene and water.
Answer» (a) Write an equation for the laboratory preparation of (i) an unsaturated hydrocarbon from calcium carbide. (ii) an alcohol from ethyl bromide. (b) What would you see, when ethyne is bubbled through a solution of bromine in carbon tetrachloride ? (c) Name the addition product formed between ethene and water.

Discussion

7709.	Specify the number of carbon atoms present in parent chain in the following compound.6
Answer» Specify the number of carbon atoms present in parent chain in the following compound. 6

Discussion

7710.	A block of mass m kg is kept on a weighing machine in an elevator.If the elevator is retarding upward by a m/s2, the reading of weighing machine is(in kgf)
Answer» A block of mass m kg is kept on a weighing machine in an elevator.If the elevator is retarding upward by a m/s2, the reading of weighing machine is(in kgf)

Discussion

7711.	79.explain the hybridisation of [Co(NH3)6]3+
Answer» 79.explain the hybridisation of [Co(NH3)6]3+

Discussion

7712.	What will be the chemical equation for wlakinf of lime?
Answer» What will be the chemical equation for wlakinf of lime?

Discussion

7713.	40. When zinc is kept inside the solution of copper sulphate then a colour change is observed why has the colour change taken place
Answer» 40. When zinc is kept inside the solution of copper sulphate then a colour change is observed why has the colour change taken place

Discussion

7714.	Calculate the volume of 320 g of SO2 at STP. [Atomic mass: S = 32 and 0=16]
Answer» Calculate the volume of 320 g of SO₂ at STP. [Atomic mass: S = 32 and 0=16]

7714.

Calculate the volume of 320 g of SO2 at STP. [Atomic mass: S = 32 and 0=16]

Answer»

Calculate the volume of 320 g of SO₂ at STP.

[Atomic mass: S = 32 and 0=16]

Discussion

7715.	Illustrate an activity showing a chemical reaction and state your observation. Give suitable examples in support of your answer.
Answer» Illustrate an activity showing a chemical reaction and state your observation. Give suitable examples in support of your answer.

Discussion

7716.	Which of the following statements are correct?I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explainedII) With increase of energy of electron in an atom, the ionisation potential value of that atom increaseIII) For multivalent atoms, electronegativity can be explained with the help of Mulliken scaleIV) Highest electronegative element is fluorine
Answer» Which of the following statements are correct? I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explained II) With increase of energy of electron in an atom, the ionisation potential value of that atom increase III) For multivalent atoms, electronegativity can be explained with the help of Mulliken scale IV) Highest electronegative element is fluorine

7716.

Which of the following statements are correct?I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explainedII) With increase of energy of electron in an atom, the ionisation potential value of that atom increaseIII) For multivalent atoms, electronegativity can be explained with the help of Mulliken scaleIV) Highest electronegative element is fluorine

Answer»

Which of the following statements are correct?

I) With the help of electronegativity difference between two bonded atoms, polarity of the bond can be explained

II) With increase of energy of electron in an atom, the ionisation potential value of that atom increase

III) For multivalent atoms, electronegativity can be explained with the help of Mulliken scale

IV) Highest electronegative element is fluorine

Discussion

7717.	Fill in the blanks with correct words from the brackets:(i) Generally ionic compounds exist in __________ (solid/liquid/gas) state.(ii) Melting and boiling points of covalent compounds are generally ________ (low/high).
Answer» Fill in the blanks with correct words from the brackets: (i) Generally ionic compounds exist in __________ (solid/liquid/gas) state. (ii) Melting and boiling points of covalent compounds are generally ________ (low/high).

Discussion

7718.	When pressure remaining constant,at what temperature will the rms speed of a gas molecule increased by 10% of the rms speed at NTP?
Answer» When pressure remaining constant,at what temperature will the rms speed of a gas molecule increased by 10% of the rms speed at NTP?

Discussion

7719.	How to find charge of polyatomic ions? Ex. PO4, CO3, OH etc
Answer» How to find charge of polyatomic ions? Ex. PO4, CO3, OH etc

Discussion

7720.	What type of compounds are usually formed between metals and non-metals and why ?
Answer» What type of compounds are usually formed between metals and non-metals and why ?

Discussion

7721.	Which of the following graph(s) is/are true for zero order reaction?
Answer» Which of the following graph(s) is/are true for zero order reaction?

Discussion

7722.	pka1 pka2 and pka3 of H3PO4 are respectively x ,y and z .pH of 0.1 M Na2HPO4 solution is 1.1 2.(x+y+z)/2 3.(y+z)/2 4.(x+y)/2
Answer» pka1 pka2 and pka3 of H3PO4 are respectively x ,y and z .pH of 0.1 M Na2HPO4 solution is 1.1 2.(x+y+z)/2 3.(y+z)/2 4.(x+y)/2

Discussion

7723.	Which of the following will be the product(s) of the given reaction?Sodium Thiosulphate+Hydrochloric Acid→
Answer» Which of the following will be the product(s) of the given reaction? $S o d i u m T h i o s u l p h a t e + H y d r o c h l o r i c A c i d \to$

7723.

Which of the following will be the product(s) of the given reaction?Sodium Thiosulphate+Hydrochloric Acid→

Answer»

Which of the following will be the product(s) of the given reaction?

$S o d i u m T h i o s u l p h a t e + H y d r o c h l o r i c A c i d \to$

Discussion

7724.	Number of atoms present in 52 g of helium is: (NA is Avogadro’s constant Gram atomic mass of He is 4 g)
Answer» Number of atoms present in 52 g of helium is: (N_A is Avogadro’s constant Gram atomic mass of He is 4 g)

7724.

Number of atoms present in 52 g of helium is: (NA is Avogadro’s constant Gram atomic mass of He is 4 g)

Answer»

Number of atoms present in 52 g of helium is:

(N_A is Avogadro’s constant
Gram atomic mass of He is 4 g)

Discussion

7725.	What this equation signifies and use of it ? But I studied electron gain enthalpy = - electron affinity . What is the difference between this two ?
Answer» What this equation signifies and use of it ? But I studied electron gain enthalpy = - electron affinity . What is the difference between this two ?

Discussion

7726.	Which substance is found when we add sodium bicarbonate and acetic acid?(in chemical equation)
Answer» Which substance is found when we add sodium bicarbonate and acetic acid?(in chemical equation)

Discussion

7727.	The stopping potential (V0)
Answer» The stopping potential $(V_{0})$

Discussion

7728.	The oxide of an element contains 67.67 percentage oxygen and the vapour density of its chloride is 79.what is the equivalent weight of metal
Answer» The oxide of an element contains 67.67 percentage oxygen and the vapour density of its chloride is 79.what is the equivalent weight of metal

Discussion

7729.	What is modern periodic law??
Answer» What is modern periodic law??

Discussion

7730.	7. Differentiate between cations and anions?
Answer» 7. Differentiate between cations and anions?

Discussion

7731.	In the process of rusting, the metal Iron (Fe) reacts with which of the following substances that are present in the atmosphere?
Answer» In the process of rusting, the metal Iron (Fe) reacts with which of the following substances that are present in the atmosphere?

Discussion

7732.	Why in structural isomers of cyclic compounds linear chain structures are not included but as we know the DBE of cyclic structures are 2 ? Explain
Answer» Why in structural isomers of cyclic compounds linear chain structures are not included but as we know the DBE of cyclic structures are 2 ? Explain

Discussion

7733.	Question 4 (e)Write the chemical formulae of the following:(e) Calcium carbonate
Answer» Question 4 (e) Write the chemical formulae of the following: (e) Calcium carbonate

Discussion

7734.	In a gaseous mixture of 2 g of H and 4g of He are present and they are mixed up to 5L volume at 2 degree celsius . calculate Ph2
Answer» In a gaseous mixture of 2 g of H and 4g of He are present and they are mixed up to 5L volume at 2 degree celsius . calculate Ph2

Discussion

7735.	24.The calculated magnetic moment (in bohr magneton) of Cu2+ ion is?
Answer» 24.The calculated magnetic moment (in bohr magneton) of Cu2+ ion is?

Discussion

7736.	Assertion (A) Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound. Reason (R) This is because sodium and chloride ions acquire octet in sodium chloride formation. Choose the correct option.
Answer» Assertion (A) Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound. Reason (R) This is because sodium and chloride ions acquire octet in sodium chloride formation. Choose the correct option.

7736.

Assertion (A) Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound. Reason (R) This is because sodium and chloride ions acquire octet in sodium chloride formation. Choose the correct option.

Answer»

Assertion (A) Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound.

Reason (R) This is because sodium and chloride ions acquire octet in sodium chloride formation.

Choose the correct option.

Discussion

7737.	How P4O6 is used daily?
Answer» How P4O6 is used daily?

Discussion

7738.	Explain displacement reaction with an example.
Answer» Explain displacement reaction with an example.

Discussion

7739.	Give scientific reasons:1. Atomic size increases down the group.2. Metallic character decreases from left to right in a period.3. Elements in the same group show same valency.
Answer» Give scientific reasons: 1. Atomic size increases down the group. 2. Metallic character decreases from left to right in a period. 3. Elements in the same group show same valency.

7739.

Give scientific reasons:1. Atomic size increases down the group.2. Metallic character decreases from left to right in a period.3. Elements in the same group show same valency.

Answer»

Give scientific reasons:

1. Atomic size increases down the group.

2. Metallic character decreases from left to right in a period.

3. Elements in the same group show same valency.

Discussion

7740.	38.Establish relation between Kc and Kp.
Answer» 38.Establish relation between Kc and Kp.

Discussion

7741.	Why is there no change in mass during chemical reactions?
Answer» Why is there no change in mass during chemical reactions?

Discussion

7742.	What is the difference between(a) an alkali and base?(b) an alkali and a metal hydroxide?
Answer» What is the difference between (a) an alkali and base? (b) an alkali and a metal hydroxide?

Discussion

7743.	Which of the following has the weakest bond?
Answer» Which of the following has the weakest bond?

Discussion

7744.	if 2 moles of caco3 is dissociated in a closed container of 10 L Then find the degree of dissociation of caco3 (kp=2 atm ; at 800 degree centigrate )
Answer» if 2 moles of caco3 is dissociated in a closed container of 10 L Then find the degree of dissociation of caco3 (kp=2 atm ; at 800 degree centigrate )

Discussion

7745.	How to eliminate Cd from Zn ores?
Answer» How to eliminate Cd from Zn ores?

Discussion

7746.	Why do all the elements of the same group have similar properties? How will the tendency to gain electrons change as we go from left to right across a period? Why?
Answer» Why do all the elements of the same group have similar properties? How will the tendency to gain electrons change as we go from left to right across a period? Why?

Discussion

7747.	Is the ionic bond more strong than covalent bond ?
Answer» Is the ionic bond more strong than covalent bond ?

Discussion

7748.	Roasting is generally done in case of the following
Answer» Roasting is generally done in case of the following

Discussion

7749.	Explain the electronic concept of oxidation and reduction.
Answer» Explain the electronic concept of oxidation and reduction.

Discussion

7750.	We make our own food in the kitchen, and hence we are producers. True or false? Give reasons.
Answer» We make our own food in the kitchen, and hence we are producers. True or false? Give reasons.

Discussion

Explore topic-wise InterviewSolutions in .

Among the first four alkali metals in group l of the periodic table Li, Na, K, Rb the most electropositive metal is which one? Why?

What is acid neutralization?

What will be the product if so2 reacts with cl2 1 in presence of charcoal 2 in absence of charcoal

Find A and B from the following:CH3CH2OH+O2→A+B+Heat and Light

Which element can be placed in the region marked by a question mark?

If 1 mole of carbon atoms weighs 12g. What is the mass (in grams ) of 1 atom of carbon?

Question 29 The first member of alkyne homologous series is (a) ethyne (b) ethene (c) propyne (d) methane

Specify the number of carbon atoms present in parent chain in the following compound.6

A block of mass m kg is kept on a weighing machine in an elevator.If the elevator is retarding upward by a m/s2, the reading of weighing machine is(in kgf)

79.explain the hybridisation of [Co(NH3)6]3+

What will be the chemical equation for wlakinf of lime?

40. When zinc is kept inside the solution of copper sulphate then a colour change is observed why has the colour change taken place

Calculate the volume of 320 g of SO2 at STP. [Atomic mass: S = 32 and 0=16]

Illustrate an activity showing a chemical reaction and state your observation. Give suitable examples in support of your answer.

Fill in the blanks with correct words from the brackets:(i) Generally ionic compounds exist in __________ (solid/liquid/gas) state.(ii) Melting and boiling points of covalent compounds are generally ________ (low/high).

When pressure remaining constant,at what temperature will the rms speed of a gas molecule increased by 10% of the rms speed at NTP?

How to find charge of polyatomic ions? Ex. PO4, CO3, OH etc

What type of compounds are usually formed between metals and non-metals and why ?

Which of the following graph(s) is/are true for zero order reaction?

pka1 pka2 and pka3 of H3PO4 are respectively x ,y and z .pH of 0.1 M Na2HPO4 solution is 1.1 2.(x+y+z)/2 3.(y+z)/2 4.(x+y)/2

Which of the following will be the product(s) of the given reaction?Sodium Thiosulphate+Hydrochloric Acid→

Number of atoms present in 52 g of helium is: (NA is Avogadro’s constant Gram atomic mass of He is 4 g)

What this equation signifies and use of it ? But I studied electron gain enthalpy = - electron affinity . What is the difference between this two ?

Which substance is found when we add sodium bicarbonate and acetic acid?(in chemical equation)

The stopping potential (V0)

The oxide of an element contains 67.67 percentage oxygen and the vapour density of its chloride is 79.what is the equivalent weight of metal

What is modern periodic law??

7. Differentiate between cations and anions?

In the process of rusting, the metal Iron (Fe) reacts with which of the following substances that are present in the atmosphere?

Why in structural isomers of cyclic compounds linear chain structures are not included but as we know the DBE of cyclic structures are 2 ? Explain

Question 4 (e)Write the chemical formulae of the following:(e) Calcium carbonate

In a gaseous mixture of 2 g of H and 4g of He are present and they are mixed up to 5L volume at 2 degree celsius . calculate Ph2

24.The calculated magnetic moment (in bohr magneton) of Cu2+ ion is?

Assertion (A) Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound. Reason (R) This is because sodium and chloride ions acquire octet in sodium chloride formation. Choose the correct option.

How P4O6 is used daily?

Explain displacement reaction with an example.

Give scientific reasons:1. Atomic size increases down the group.2. Metallic character decreases from left to right in a period.3. Elements in the same group show same valency.

38.Establish relation between Kc and Kp.

Why is there no change in mass during chemical reactions?

What is the difference between(a) an alkali and base?(b) an alkali and a metal hydroxide?

Which of the following has the weakest bond?

if 2 moles of caco3 is dissociated in a closed container of 10 L Then find the degree of dissociation of caco3 (kp=2 atm ; at 800 degree centigrate )

How to eliminate Cd from Zn ores?

Why do all the elements of the same group have similar properties? How will the tendency to gain electrons change as we go from left to right across a period? Why?

Is the ionic bond more strong than covalent bond ?

Roasting is generally done in case of the following

Explain the electronic concept of oxidation and reduction.

We make our own food in the kitchen, and hence we are producers. True or false? Give reasons.

Fill in the blanks with correct words from the brackets:(i) Generally ionic compounds exist in __ (solid/liquid/gas) state.(ii) Melting and boiling points of covalent compounds are generally (low/high).