15280 + Interview Questions in Chemistry Page 89 InterviewSolution

4401.	16.when alcohol reacts with metal it act as an acid so what is the reason of the acidic nature of alcohols in this type of reactions?
Answer» 16.when alcohol reacts with metal it act as an acid so what is the reason of the acidic nature of alcohols in this type of reactions?

Discussion

4402.	Draw the structure of ammonia and give the reason for alkaline nature of aqueous ammonia.
Answer» Draw the structure of ammonia and give the reason for alkaline nature of aqueous ammonia.

Discussion

4403.	Which of the followings is an example of liquid dish washing detergent?
Answer» Which of the followings is an example of liquid dish washing detergent?

Discussion

4404.	Which one of the following can be used as an acid-base indicator by a visually impaired student?(a) Litmus(b) Turmeric(c) Vanilla essence(d) Petunia leaves
Answer» Which one of the following can be used as an acid-base indicator by a visually impaired student? (a) Litmus (b) Turmeric (c) Vanilla essence (d) Petunia leaves

Discussion

4405.	when NH3 acts as strong and weak ligand
Answer» when NH3 acts as strong and weak ligand

Discussion

4406.	Which of the following pair is the one which shows abiotic: biotic component combination?
Answer» Which of the following pair is the one which shows abiotic: biotic component combination?

Discussion

4407.	Q. AgCl will be least soluble in -a) 0.1 M Ag Brb) 0.1 M HClc) 0.05 M AgNO3d) 0.5 M NaCl
Answer» Q. AgCl will be least soluble in - a) 0.1 M Ag Br b) 0.1 M HCl c) 0.05 M AgNO3 d) 0.5 M NaCl

Discussion

4408.	Sulphuric acid is called the King of Chemicals. Why is it called so?
Answer» Sulphuric acid is called the King of Chemicals. Why is it called so?

Discussion

4409.	ax+by-c=0bx+ay=1+c
Answer» ax+by-c=0 bx+ay=1+c

Discussion

4410.	KCl is used as salt bridge Because, i)It provides equal number of K+ and Cl− ions. ii)KCl as a salt bridge maintains neutrality in the system.
Answer» KCl is used as salt bridge Because, i)It provides equal number of $K^{+}$ and $C l^{-}$ ions. ii) $K C l$ as a salt bridge maintains neutrality in the system.

4410.

KCl is used as salt bridge Because, i)It provides equal number of K+ and Cl− ions. ii)KCl as a salt bridge maintains neutrality in the system.

Answer»

KCl is used as salt bridge Because,

i)It provides equal number of $K^{+}$ and $C l^{-}$ ions.

ii) $K C l$ as a salt bridge maintains neutrality in the system.

Discussion

4411.	23. The number of chloride ions present in 5.2 g ofbarium chloride is approximately\lbrack Atomic mass of barium 137 u and chlorine 35.5 u\rbrack(2) 10.4 g(1) 5.2g(4) 2.6 g(3) 1.8 g
Answer» 23. The number of chloride ions present in 5.2 g ofbarium chloride is approximately\lbrack Atomic mass of barium 137 u and chlorine 35.5 u\rbrack(2) 10.4 g(1) 5.2g(4) 2.6 g(3) 1.8 g

Discussion

4412.	Define the term electrolysis.
Answer» Define the term electrolysis.

Discussion

4413.	The nucleophilicity order of halogens in polar protic solvent is :
Answer» The nucleophilicity order of halogens in polar protic solvent is :

Discussion

4414.	48. Atom A present on corner,B present on face centre,C present on body centre and D present on edge centre.It all the atom touching one of the 2 fold,3 fold and 4 fold symmetry are removed.what is the formula of A,B,C and D.
Answer» 48. Atom A present on corner,B present on face centre,C present on body centre and D present on edge centre.It all the atom touching one of the 2 fold,3 fold and 4 fold symmetry are removed.what is the formula of A,B,C and D.

Discussion

4415.	what is enamel
Answer» what is enamel

Discussion

4416.	Among successive members in the homologous series, which of the following properties increases by increasing the molecular mass
Answer» Among successive members in the homologous series, which of the following properties increases by increasing the molecular mass

Discussion

4417.	Fill in the blanks:1. The formula of chloride of metal M is MCl2. The metal M belongs to ________ group.2. ________ group in the periodic table contains elements that are all gases at room temperature.3. The arrangement of elements in a group of three is known as ________.4. The law used by Newlands to arrange elements is known as ________.5. The element eka-aluminium in Mendeleev’s periodic table is known as ________ in the modern periodic table.6. Elements showing properties of both metals and non-metals are known as ________.
Answer» Fill in the blanks: 1. The formula of chloride of metal M is MCl₂. The metal M belongs to ________ group. 2. ________ group in the periodic table contains elements that are all gases at room temperature. 3. The arrangement of elements in a group of three is known as ________. 4. The law used by Newlands to arrange elements is known as ________. 5. The element eka-aluminium in Mendeleev’s periodic table is known as ________ in the modern periodic table. 6. Elements showing properties of both metals and non-metals are known as ________.

4417.

Fill in the blanks:1. The formula of chloride of metal M is MCl2. The metal M belongs to group.2. group in the periodic table contains elements that are all gases at room temperature.3. The arrangement of elements in a group of three is known as .4. The law used by Newlands to arrange elements is known as .5. The element eka-aluminium in Mendeleev’s periodic table is known as in the modern periodic table.6. Elements showing properties of both metals and non-metals are known as .

Answer»

Fill in the blanks:

1. The formula of chloride of metal M is MCl₂. The metal M belongs to ________ group.

2. ________ group in the periodic table contains elements that are all gases at room temperature.

3. The arrangement of elements in a group of three is known as ________.

4. The law used by Newlands to arrange elements is known as ________.

5. The element eka-aluminium in Mendeleev’s periodic table is known as ________ in the modern periodic table.

6. Elements showing properties of both metals and non-metals are known as ________.

Discussion

4418.	no3 is polar or non polar
Answer» no3 is polar or non polar

Discussion

4419.	What is the difference between R - OH and R - O - R?
Answer» What is the difference between R - OH and R - O - R?

Discussion

4420.	If X=2CuSO4.10H2O, then the number of water of crystallisation present in one formula unit of X is __.5
Answer» If $X = 2 C u S O_{4} .10 H_{2} O$ , then the number of water of crystallisation present in one formula unit of X is __. 5

Discussion

4421.	Choose the correct option based on the statements given below: Statement 1: Carbon always shares electrons and forms covalent bond with other elements. Statement 2: C+4 and C−4 ions are highly unstable.
Answer» Choose the correct option based on the statements given below: Statement 1: Carbon always shares electrons and forms covalent bond with other elements. Statement 2: $C^{+ 4}$ and $C^{- 4}$ ions are highly unstable.

4421.

Choose the correct option based on the statements given below: Statement 1: Carbon always shares electrons and forms covalent bond with other elements. Statement 2: C+4 and C−4 ions are highly unstable.

Answer»

Choose the correct option based on the statements given below:

Statement 1: Carbon always shares electrons and forms covalent bond with other elements.

Statement 2: $C^{+ 4}$ and $C^{- 4}$ ions are highly unstable.

Discussion

4422.	Sodium hydroxide is added drop by drop to the solution of metallic salts because:
Answer» Sodium hydroxide is added drop by drop to the solution of metallic salts because:

Discussion

4423.	Name the metal which has been placed: (a) at the bottom of the reactivity series (b) at the top of the reactivity series (c) just below copper in the reactivity series
Answer» Name the metal which has been placed: (a) at the bottom of the reactivity series (b) at the top of the reactivity series (c) just below copper in the reactivity series

Discussion

4424.	The rate constant (k) of a first order reaction is found out to be 0.0693 min−1. A reactant having initial concentration of 20 molL−1 is reduced to 2.5 molL−1 in
Answer» The rate constant (k) of a first order reaction is found out to be $0.0693 {min}^{- 1}$ . A reactant having initial concentration of $20 m o l L^{- 1}$ is reduced to $2.5 m o l L^{- 1}$ in

Discussion

4425.	IF phosphorus is considered to contain P4 molecules, then calculate the number of moles in 100 g of phosphorus.
Answer» IF phosphorus is considered to contain $P_{4}$ molecules, then calculate the number of moles in 100 g of phosphorus.

Discussion

4426.	why tertiary carbon is most stable .it will be surrounded by three methyl group carrying positive charge it will donate positive charge to carbon now carbon will gain three more electrons hence this must decrease stability of tertiary carbon
Answer» why tertiary carbon is most stable .it will be surrounded by three methyl group carrying positive charge it will donate positive charge to carbon now carbon will gain three more electrons hence this must decrease stability of tertiary carbon

Discussion

4427.	What is a screw gauge?
Answer» What is a screw gauge?

Discussion

4428.	why when Benedicts reagents added to sugar solution gives blue colour?
Answer» why when Benedicts reagents added to sugar solution gives blue colour?

Discussion

4429.	Which metal is liquid?
Answer» Which metal is liquid?

Discussion

4430.	Iron reacts with oxygen to form Fe2O3. If the atomic mass of iron is 56, the mass of oxygen that reacts with 2.5 moles of iron is
Answer» Iron reacts with oxygen to form $F e_{2} O_{3}$ . If the atomic mass of iron is 56, the mass of oxygen that reacts with 2.5 moles of iron is

Discussion

4431.	How much of 0.3 M ammonium hydroxide should be mixed with 30 ml of 0.2M solution of ammonium chloride to give buffer solution of pH 8.66 and 10 is (pkb=4.75)?
Answer» How much of 0.3 M ammonium hydroxide should be mixed with 30 ml of 0.2M solution of ammonium chloride to give buffer solution of pH 8.66 and 10 is (pkb=4.75)?

Discussion

4432.	What is the meaning of Annomeric carbon
Answer» What is the meaning of Annomeric carbon

Discussion

4433.	Which temperature scale is used in cryogenics?
Answer» Which temperature scale is used in cryogenics?

Discussion

4434.	When magnesium ribbon reacts with air, heat and light is produced. The balanced chemical equation is: 2Mg+O2→2MgO The reactant(s) in the reaction is/are:
Answer» When magnesium ribbon reacts with air, heat and light is produced. The balanced chemical equation is: $2 Mg + O_{2} \to 2 MgO$ The reactant(s) in the reaction is/are:

4434.

When magnesium ribbon reacts with air, heat and light is produced. The balanced chemical equation is: 2Mg+O2→2MgO The reactant(s) in the reaction is/are:

Answer»

When magnesium ribbon reacts with air, heat and light is produced. The balanced chemical equation is:

$2 Mg + O_{2} \to 2 MgO$

The reactant(s) in the reaction is/are:

Discussion

4435.	Triads of elements arranged in increasing order of their atomic masses were proposed by-
Answer» Triads of elements arranged in increasing order of their atomic masses were proposed by-

Discussion

4436.	From the list given below, select the word(s) required to correctly complete the blanks (i) to (v) in the following passage:Note: words chosen from the list are to be used only once. Write only the answers. Do not copy the passage. [reddish brown, ammonium, nitrogen dioxide, hydroxyl, dirty green, ammonia, acidic, alkaline]Nitrogen and hydrogen combine in the presence of a catalyst to give (i) ________ gas. When the above mentioned gas is passed through water it forms a solution which will be (ii) ________ in nature and the solution contains (iii) ______ ions and (iv) _______ ions. The above solution when added to iron (II) sulphate solution gives a (v) _______ coloured precipitate of iron (II) hydroxide.
Answer» From the list given below, select the word(s) required to correctly complete the blanks (i) to (v) in the following passage: Note: words chosen from the list are to be used only once. Write only the answers. Do not copy the passage. [reddish brown, ammonium, nitrogen dioxide, hydroxyl, dirty green, ammonia, acidic, alkaline] Nitrogen and hydrogen combine in the presence of a catalyst to give (i) ________ gas. When the above mentioned gas is passed through water it forms a solution which will be (ii) ________ in nature and the solution contains (iii) ______ ions and (iv) _______ ions. The above solution when added to iron (II) sulphate solution gives a (v) _______ coloured precipitate of iron (II) hydroxide.

Discussion

4437.	Mention three man-made sources of air pollution.
Answer» Mention three man-made sources of air pollution.

Discussion

4438.	Galvanizing works because __________.
Answer» Galvanizing works because __________.

Discussion

4439.	What are Exhaustible and Inexhaustible natural resources?
Answer» What are Exhaustible and Inexhaustible natural resources?

Discussion

4440.	From the following list of substances. choose one substance in each case which matches the description given below : Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate. zinc carbonate. (a) A nitrate which gives off only oxygen when heated. (b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam. (c) A nitrate which gives off oxygen and nitrogen dioxide when heated.
Answer» From the following list of substances. choose one substance in each case which matches the description given below : Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate. zinc carbonate. (a) A nitrate which gives off only oxygen when heated. (b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam. (c) A nitrate which gives off oxygen and nitrogen dioxide when heated.

4440.

From the following list of substances. choose one substance in each case which matches the description given below : Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate. zinc carbonate. (a) A nitrate which gives off only oxygen when heated. (b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam. (c) A nitrate which gives off oxygen and nitrogen dioxide when heated.

Answer»

From the following list of substances. choose one substance in each case which matches the description given below :

Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate. zinc carbonate.

(a) A nitrate which gives off only oxygen when heated.

(b) A nitrate which on heating decomposes into dinitrogen oxide [nitrous oxide] and steam.

(c) A nitrate which gives off oxygen and nitrogen dioxide when heated.

Discussion

4441.	ntthe ionisation energy of He+ is 19.6 J/atom . the energy of first stationary state o Li2+ is?n
Answer» ntthe ionisation energy of He+ is 19.6 J/atom . the energy of first stationary state o Li2+ is?n

Discussion

4442.	Ethyl benzoate can be prepared from benzoic acid by using
Answer» Ethyl benzoate can be prepared from benzoic acid by using

Discussion

4443.	Is graphite also a allotrope of carbon?
Answer» Is graphite also a allotrope of carbon?

Discussion

4444.	Does crystallization of solute be called as percipitation?
Answer» Does crystallization of solute be called as percipitation?

Discussion

4445.	The pH of a solution is found to be 4.5. What is the nature of the solution?
Answer» The pH of a solution is found to be 4.5. What is the nature of the solution?

Discussion

4446.	A4B2C3, the number ofif starting from 2 moles ofQ 49/75 In the reaction 4A + 2B 3Cmoles of product formed will beA, 1.2 moles of B and 1.44 moles of C
Answer» A4B2C3, the number ofif starting from 2 moles ofQ 49/75 In the reaction 4A + 2B 3Cmoles of product formed will beA, 1.2 moles of B and 1.44 moles of C

Discussion

4447.	What is the strongest metal in the world?name the place where it is found.
Answer» What is the strongest metal in the world?name the place where it is found.

Discussion

4448.	6. Why the value of kp and kc depends on the temperature only but not on the concentration or the pressure or volume
Answer» 6. Why the value of kp and kc depends on the temperature only but not on the concentration or the pressure or volume

Discussion

4449.	Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.(a) Write equations to show how X and Y form ions.(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.
Answer» Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3. (a) Write equations to show how X and Y form ions. (b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.

Discussion

4450.	How do metals and non metals react?
Answer» How do metals and non metals react?

Discussion

Explore topic-wise InterviewSolutions in .

16.when alcohol reacts with metal it act as an acid so what is the reason of the acidic nature of alcohols in this type of reactions?

Draw the structure of ammonia and give the reason for alkaline nature of aqueous ammonia.

Which of the followings is an example of liquid dish washing detergent?

Which one of the following can be used as an acid-base indicator by a visually impaired student?(a) Litmus(b) Turmeric(c) Vanilla essence(d) Petunia leaves

when NH3 acts as strong and weak ligand

Which of the following pair is the one which shows abiotic: biotic component combination?

Q. AgCl will be least soluble in -a) 0.1 M Ag Brb) 0.1 M HClc) 0.05 M AgNO3d) 0.5 M NaCl

Sulphuric acid is called the King of Chemicals. Why is it called so?

ax+by-c=0bx+ay=1+c

KCl is used as salt bridge Because, i)It provides equal number of K+ and Cl− ions. ii)KCl as a salt bridge maintains neutrality in the system.

23. The number of chloride ions present in 5.2 g ofbarium chloride is approximately\lbrack Atomic mass of barium 137 u and chlorine 35.5 u\rbrack(2) 10.4 g(1) 5.2g(4) 2.6 g(3) 1.8 g

Define the term electrolysis.

The nucleophilicity order of halogens in polar protic solvent is :

48. Atom A present on corner,B present on face centre,C present on body centre and D present on edge centre.It all the atom touching one of the 2 fold,3 fold and 4 fold symmetry are removed.what is the formula of A,B,C and D.

what is enamel

Among successive members in the homologous series, which of the following properties increases by increasing the molecular mass

no3 is polar or non polar

What is the difference between R - OH and R - O - R?

If X=2CuSO4.10H2O, then the number of water of crystallisation present in one formula unit of X is __.5

Choose the correct option based on the statements given below: Statement 1: Carbon always shares electrons and forms covalent bond with other elements. Statement 2: C+4 and C−4 ions are highly unstable.

Sodium hydroxide is added drop by drop to the solution of metallic salts because:

Name the metal which has been placed: (a) at the bottom of the reactivity series (b) at the top of the reactivity series (c) just below copper in the reactivity series

The rate constant (k) of a first order reaction is found out to be 0.0693 min−1. A reactant having initial concentration of 20 molL−1 is reduced to 2.5 molL−1 in

IF phosphorus is considered to contain P4 molecules, then calculate the number of moles in 100 g of phosphorus.

why tertiary carbon is most stable .it will be surrounded by three methyl group carrying positive charge it will donate positive charge to carbon now carbon will gain three more electrons hence this must decrease stability of tertiary carbon

What is a screw gauge?

why when Benedicts reagents added to sugar solution gives blue colour?

Which metal is liquid?

Iron reacts with oxygen to form Fe2O3. If the atomic mass of iron is 56, the mass of oxygen that reacts with 2.5 moles of iron is

How much of 0.3 M ammonium hydroxide should be mixed with 30 ml of 0.2M solution of ammonium chloride to give buffer solution of pH 8.66 and 10 is (pkb=4.75)?

What is the meaning of Annomeric carbon

Which temperature scale is used in cryogenics?

When magnesium ribbon reacts with air, heat and light is produced. The balanced chemical equation is: 2Mg+O2→2MgO The reactant(s) in the reaction is/are:

Triads of elements arranged in increasing order of their atomic masses were proposed by-

Mention three man-made sources of air pollution.

Galvanizing works because __________.

What are Exhaustible and Inexhaustible natural resources?

ntthe ionisation energy of He+ is 19.6 J/atom . the energy of first stationary state o Li2+ is?n

Ethyl benzoate can be prepared from benzoic acid by using

Is graphite also a allotrope of carbon?

Does crystallization of solute be called as percipitation?

The pH of a solution is found to be 4.5. What is the nature of the solution?

A4B2C3, the number ofif starting from 2 moles ofQ 49/75 In the reaction 4A + 2B 3Cmoles of product formed will beA, 1.2 moles of B and 1.44 moles of C

What is the strongest metal in the world?name the place where it is found.

6. Why the value of kp and kc depends on the temperature only but not on the concentration or the pressure or volume

Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.(a) Write equations to show how X and Y form ions.(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.

How do metals and non metals react?