15280 + Interview Questions in Chemistry Page 185 InterviewSolution

9201.	If BCD and EFG are congruent by SAS congruence postulate and AB = MN, B =N, then which is the additional equality is right to complete the postulate?
Answer» If BCD and EFG are congruent by SAS congruence postulate and AB = MN, B =N, then which is the additional equality is right to complete the postulate?

Discussion

9202.	31. The rate of a gaseous reaction is given by expression K[A][B].If the volume of the reaction vessel is suddenly reduced to 1/4th of the initial volume,the reaction rate relating to original rate will be
Answer» 31. The rate of a gaseous reaction is given by expression K[A][B].If the volume of the reaction vessel is suddenly reduced to 1/4th of the initial volume,the reaction rate relating to original rate will be

Discussion

9203.	What are allotrophs and what are they used for?
Answer» What are allotrophs and what are they used for?

Discussion

9204.	A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure (a) What mass of carbon dioxide can it held under the similar condition of temperature and pressure? (b) If the number of molecules of hydrogen in the cylinder is X, calculate the number of carbon dioxide molecules in the cylinder. State the law that helped you to arrive at the above result.
Answer» A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure (a) What mass of carbon dioxide can it held under the similar condition of temperature and pressure? (b) If the number of molecules of hydrogen in the cylinder is X, calculate the number of carbon dioxide molecules in the cylinder. State the law that helped you to arrive at the above result.

9204.

A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure (a) What mass of carbon dioxide can it held under the similar condition of temperature and pressure? (b) If the number of molecules of hydrogen in the cylinder is X, calculate the number of carbon dioxide molecules in the cylinder. State the law that helped you to arrive at the above result.

Answer»

A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure

(a) What mass of carbon dioxide can it held under the similar condition of temperature and pressure?

(b) If the number of molecules of hydrogen in the cylinder is X, calculate the number of carbon dioxide molecules in the cylinder. State the law that helped you to arrive at the above result.

Discussion

9205.	Value of gas constant R is
Answer» Value of gas constant R is

Discussion

9206.	Write the principle of liquation.
Answer» Write the principle of liquation.

Discussion

9207.	which is incoorect stability order 1.CH2=CH-C^+H2>CH3-CH^+-CH3 2.CH2=CH^+CH3-CH^--CH3 4.CH3C^+H2>CH3O-C^+H2
Answer» which is incoorect stability order 1.CH2=CH-C^+H2>CH3-CH^+-CH3 2.CH2=CH^+CH3-CH^--CH3 4.CH3C^+H2>CH3O-C^+H2

Discussion

9208.	Which method do you suggest for extraction of highly reactive metals and why?
Answer» Which method do you suggest for extraction of highly reactive metals and why?

Discussion

9209.	If n(A) = 7 and n(An B) = 3, then n[(An B)'n A] is
Answer» If n(A) = 7 and n(An B) = 3, then n[(An B)'n A] is

Discussion

9210.	Define the life process of plant?
Answer» Define the life process of plant?

Discussion

9211.	Does addition of NaCl in AgCN solution affect its solubility??
Answer» Does addition of NaCl in AgCN solution affect its solubility??

Discussion

9212.	In (B4O5(OH)4)2− the number of boron atoms having an octet of elelctron is:
Answer» In $(B_{4} O_{5} (O H)_{4})^{2 -}$ the number of boron atoms having an octet of elelctron is:

Discussion

9213.	Copper is extracted from Copper pyrites by heating in a Bessemer converted. The method is based on the principle that
Answer» Copper is extracted from Copper pyrites by heating in a Bessemer converted. The method is based on the principle that

Discussion

9214.	21 g of nitrogen gas is mixed with 1.2 moles of SO2 gas and 1.21×1023 molecules of O2 gas. Find the volume of the gaseous mixture (assuming no reaction) at STP.
Answer» $21 g$ of nitrogen gas is mixed with 1.2 moles of $S O_{2}$ gas and $1.21 \times 10^{23}$ molecules of $O_{2}$ gas. Find the volume of the gaseous mixture (assuming no reaction) at STP.

Discussion

9215.	The ten per cent law is associated with (a) transfer of energy from various trophic levels to decomposers in a food chain (b) transfer of ATP energy from one organism to another (c) transfer of chemical energy from one organism to another (d) transfer of sun's energy to the organisms called producers.
Answer» The ten per cent law is associated with (a) transfer of energy from various trophic levels to decomposers in a food chain (b) transfer of ATP energy from one organism to another (c) transfer of chemical energy from one organism to another (d) transfer of sun's energy to the organisms called producers.

9215.

The ten per cent law is associated with (a) transfer of energy from various trophic levels to decomposers in a food chain (b) transfer of ATP energy from one organism to another (c) transfer of chemical energy from one organism to another (d) transfer of sun's energy to the organisms called producers.

Answer»

The ten per cent law is associated with

(a) transfer of energy from various trophic levels to decomposers in a food chain

(b) transfer of ATP energy from one organism to another

(c) transfer of chemical energy from one organism to another

(d) transfer of sun's energy to the organisms called producers.

Discussion

9216.	Question 15Pentane has the molecular formula C5H12. It has(a) 5 covalent bonds(b) 12 covalent bonds(c) 16 covalent bonds(d) 17 covalent bonds
Answer» Question 15 Pentane has the molecular formula $C_{5} H_{12}$ . It has (a) 5 covalent bonds (b) 12 covalent bonds (c) 16 covalent bonds (d) 17 covalent bonds

Discussion

9217.	Concentrated nitric acid renders iron passive. Give reason. [2 MARKS]
Answer» Concentrated nitric acid renders iron passive. Give reason. [2 MARKS]

Discussion

9218.	3 In BF3, the B-F bond length is 1.30 A, when BF3, is allowed to be treated with Me3N, it forms an adduct,(Me3N → BF3) The bond length of B-F inthe adduct is(1) Greater than 1.30(3) Equal to 1.30 (2) Smaller than 1.30 A(4) None of these
Answer» 3 In BF3, the B-F bond length is 1.30 A, when BF3, is allowed to be treated with Me3N, it forms an adduct,(Me3N → BF3) The bond length of B-F inthe adduct is(1) Greater than 1.30(3) Equal to 1.30 (2) Smaller than 1.30 A(4) None of these

Discussion

9219.	Which of the following should be correct according to Hund's rule?
Answer» Which of the following should be correct according to Hund's rule?

Discussion

9220.

Shelley's sonnet follows the traditional structure of the fourteen-line Italian sonnet, featuring an opening octave, or set of eight lines, that presents a conflict or dilemma, followed by a sestet, or set of six lines, that offers some resolution or commentary upon the proposition introduced in the octave. Read the poem carefully and complete the following table on the structure of the poem. Rhyme Scheme Theme Octave Sestet

Answer»

Shelley's
sonnet follows the traditional structure of the fourteen-line Italian
sonnet, featuring an opening octave, or set of eight lines, that
presents a conflict or dilemma, followed by a sestet, or set of six
lines, that offers some resolution or commentary upon the proposition
introduced in the octave. Read the poem carefully and complete the
following table on the structure of the poem.

	Rhyme Scheme	Theme
Octave
Sestet

Discussion

9221.	Name the allotrope of carbon which has a hexagonal arrangement of atoms.
Answer» Name the allotrope of carbon which has a hexagonal arrangement of atoms.

Discussion

9222.	Which of the following properties in metals are caused by metallic bonding?
Answer» Which of the following properties in metals are caused by metallic bonding?

Discussion

9223.	Discuss Calgon's method in detail.
Answer» Discuss Calgon's method in detail.

Discussion

9224.

A compound on analysis gave the following percentage composition. Na—14.31 % S—9.97 % H—6.22 % O—69.5 %. Calculate the molecular formula of the compound, if all the hydrogen present in the compound is combined with oxygen to form water of crystallization. Molecular mass of compound is 322.[Na = 23, S = 32, H = 1, O = 16]

Answer» A compound on analysis gave the following percentage composition.

Na—14.31 %	S—9.97 %
H—6.22 %	O—69.5 %.

Calculate the molecular formula of the compound, if all the hydrogen present in the compound is combined with oxygen to form water of crystallization. Molecular mass of compound is 322.

[Na = 23, S = 32, H = 1, O = 16]

Discussion

9225.	Which petroleum product is used in place of coal tar for metalling the roads?
Answer» Which petroleum product is used in place of coal tar for metalling the roads?

Discussion

9226.	Percentage composition of hydrogen in benzene (C6H6) is :
Answer» Percentage composition of hydrogen in benzene ( $C_{6} H_{6}$ ) is :

Discussion

9227.	ntA vessel is filled with a mixture of oxygen and nitrogen. At what ratio of partial pressures will be the mass of gases be identical?n nt(a) P(O2) = 0.78(N2)n nt(b) P(O2) = 8.75(N2)n nt(c) P(O2) = 11.4 (N2)n nt(d) P(O2) = 0.875(N2)n
Answer» ntA vessel is filled with a mixture of oxygen and nitrogen. At what ratio of partial pressures will be the mass of gases be identical?n nt(a) P(O2) = 0.78(N2)n nt(b) P(O2) = 8.75(N2)n nt(c) P(O2) = 11.4 (N2)n nt(d) P(O2) = 0.875(N2)n

Discussion

9228.	A. Name the process which increases thermal conductivity of stainless steel cook wares by adding copper. B. In a forest increasing number of herbivores leads to air pollution. Justify. C.What are the advantages of modern periodic table E.The cook wares made by stainless steel are not get rust. Why?
Answer» A. Name the process which increases thermal conductivity of stainless steel cook wares by adding copper. B. In a forest increasing number of herbivores leads to air pollution. Justify. C.What are the advantages of modern periodic table E.The cook wares made by stainless steel are not get rust. Why?

9228.

A. Name the process which increases thermal conductivity of stainless steel cook wares by adding copper. B. In a forest increasing number of herbivores leads to air pollution. Justify. C.What are the advantages of modern periodic table E.The cook wares made by stainless steel are not get rust. Why?

Answer»

A. Name the process which increases thermal conductivity of stainless steel cook wares by adding copper.
B. In a forest increasing number of herbivores leads to air pollution. Justify.

C.What are the advantages of modern periodic table

E.The cook wares made by stainless steel are not get rust. Why?

Discussion

9229.	When ethanol is heated with alkaline potassium permanganate solution, it gets converted into ethanoic acid. In this reaction, alkaline potassium permanganate acts as : (a) reducing agent (b) oxidising agent (c) catalyst (d) dehydrating agent
Answer» When ethanol is heated with alkaline potassium permanganate solution, it gets converted into ethanoic acid. In this reaction, alkaline potassium permanganate acts as : (a) reducing agent (b) oxidising agent (c) catalyst (d) dehydrating agent

Discussion

9230.	if 1g of sulphur dioxid contain x no.of molecules,what will be the no. of molecules in 1 gram of methane
Answer» if 1g of sulphur dioxid contain x no.of molecules,what will be the no. of molecules in 1 gram of methane

Discussion

9231.	calculate total no.,shared pairs,unshared pairs and no. of valance electron in Thionyl chloride and draw its lewis structur
Answer» calculate total no.,shared pairs,unshared pairs and no. of valance electron in Thionyl chloride and draw its lewis structur

Discussion

9232.	Write down the word equation or balanced equation for the action of concentrated nitric acid on copper.
Answer» Write down the word equation or balanced equation for the action of concentrated nitric acid on copper.

Discussion

9233.	Choose the correct option.
Answer» Choose the correct option.

Discussion

9234.	Write answers to the following questions in your own words.(a) How is light scattered by the air?(b) Explain the various properties of water.(c) Why is the density of seawater more than that of rain water?(d) What is the importance of good soil structure?(e) What are the various uses of soil?(f) What is the need and importance of soil testing from the point of view of farmers?(g) What is the importance of air in transmission of sound?(h) Why should a glass bottle completely filled with water never be kept in a freezer?
Answer» Write answers to the following questions in your own words. (a) How is light scattered by the air? (b) Explain the various properties of water. (c) Why is the density of seawater more than that of rain water? (d) What is the importance of good soil structure? (e) What are the various uses of soil? (f) What is the need and importance of soil testing from the point of view of farmers? (g) What is the importance of air in transmission of sound? (h) Why should a glass bottle completely filled with water never be kept in a freezer?

Discussion

9235.	Statement 1: Hydrogen just needs 2 electrons to fill its outermost orbit. Statement 2: The first orbit can occupy only 2 electrons.
Answer» Statement 1: Hydrogen just needs 2 electrons to fill its outermost orbit. Statement 2: The first orbit can occupy only 2 electrons.

9235.

Statement 1: Hydrogen just needs 2 electrons to fill its outermost orbit. Statement 2: The first orbit can occupy only 2 electrons.

Answer»

Statement 1: Hydrogen just needs 2 electrons to fill its outermost orbit.

Statement 2: The first orbit can occupy only 2 electrons.

Discussion

9236.	69. initial concentration of the reactant is 1M. the concentration becomes 0.9, 0.8, and 0.7M in 2hrs, 4hrs, and 6hrs respectively. then the order of the reaction is
Answer» 69. initial concentration of the reactant is 1M. the concentration becomes 0.9, 0.8, and 0.7M in 2hrs, 4hrs, and 6hrs respectively. then the order of the reaction is

Discussion

9237.	Which of the following oxides of nitrogen is/are colourless ?
Answer» Which of the following oxides of nitrogen is/are colourless ?

Discussion

9238.	Name the following:(i) The kind of elements that ionize by losing electrons.(ii) The kind of elements that ionize by gaining electrons.(iii) Two metals that do not get oxidized at high temperature.(iv) Two metals that get oxidized just by exposure to air.(v) Three metals that react with cold water to liberate hydrogen.(vi) A metal which in the red hot state reacts with steam reversibly to produce hydrogen.(vii) Two metals that react explosively with acids.(viii) A metal that does not react with hydrochloric or sulphuric acid.(ix) Two metals that dissolve only in aqua regia.(x) Two metallic oxides that get decomposed by heat.(xi) Two metallic hydroxides that dissolve in water to give alkalis.(xii) Two metal carbonates which are soluble in water.(xiii) Two metal carbonates that do not decompose when heated.(xiv) Two metallic nitrates which yield oxygen as the only gaseous product when heated.(xv) Two metallic nitrates when heated decompose to yield respective metals.
Answer» Name the following: (i) The kind of elements that ionize by losing electrons. (ii) The kind of elements that ionize by gaining electrons. (iii) Two metals that do not get oxidized at high temperature. (iv) Two metals that get oxidized just by exposure to air. (v) Three metals that react with cold water to liberate hydrogen. (vi) A metal which in the red hot state reacts with steam reversibly to produce hydrogen. (vii) Two metals that react explosively with acids. (viii) A metal that does not react with hydrochloric or sulphuric acid. (ix) Two metals that dissolve only in aqua regia. (x) Two metallic oxides that get decomposed by heat. (xi) Two metallic hydroxides that dissolve in water to give alkalis. (xii) Two metal carbonates which are soluble in water. (xiii) Two metal carbonates that do not decompose when heated. (xiv) Two metallic nitrates which yield oxygen as the only gaseous product when heated. (xv) Two metallic nitrates when heated decompose to yield respective metals.

Discussion

9239.	Hydrogen is having one electron. To complete its duplet, it should gain one electron. Then it should become Hydride(H- )ion. But how can it loose one electron to form Hydeogen (H+) ion ? Why does it do so as it is gaining no stability ?
Answer» Hydrogen is having one electron. To complete its duplet, it should gain one electron. Then it should become Hydride(H- )ion. But how can it loose one electron to form Hydeogen (H+) ion ? Why does it do so as it is gaining no stability ?

Discussion

9240.	What is the effect of Nitric Acid on methyl orange ?
Answer» What is the effect of Nitric Acid on methyl orange ?

Discussion

9241.	Explain the hybridisation taking place in H2O molecule, which is responsible for its bond formation.
Answer» Explain the hybridisation taking place in $H_{2} O$ molecule, which is responsible for its bond formation.

Discussion

9242.	which of the following is used to make toys a) plaster of Paris b) gypsum c) bleaching powder d) calcium carbonate
Answer» which of the following is used to make toys a) plaster of Paris b) gypsum c) bleaching powder d) calcium carbonate

9242.

which of the following is used to make toys a) plaster of Paris b) gypsum c) bleaching powder d) calcium carbonate

Answer»

which of the following is used to make toys

a) plaster of Paris b) gypsum c) bleaching powder d) calcium carbonate

Discussion

9243.	Explain the gravity separation method.
Answer» Explain the gravity separation method.

Discussion

9244.	How could the modern periodic table remove various anomalies of Mendleev‘s periodic table?
Answer» How could the modern periodic table remove various anomalies of Mendleev‘s periodic table?

Discussion

9245.	Two metal spheres have radii r and 2rand they emitthermal radiation with maximum intensities atwavelengths and 2% respectively. The respectiveratio of the radiant energy emitted by them per secondwill be(1) 4 1(2) 1 4(3) 16 1(4) 8 1
Answer» Two metal spheres have radii r and 2rand they emitthermal radiation with maximum intensities atwavelengths and 2% respectively. The respectiveratio of the radiant energy emitted by them per secondwill be(1) 4 1(2) 1 4(3) 16 1(4) 8 1

Discussion

9246.	How many litres of O2 at STP are needed for the complete combustion of 80 g of liquid hexane (C6H14)?(Given:C6H14 +O2→CO2 + H2O)
Answer» How many litres of $O_{2}$ at STP are needed for the complete combustion of $80 g$ of liquid hexane ( $C_{6} H_{14})$ ? ( $G i v e n : C_{6} H_{14} + O_{2} \to C O_{2} + H_{2} O$ )

Discussion

9247.	What will be the formula and electron dot structure of Cyclopentane?
Answer» What will be the formula and electron dot structure of Cyclopentane?

Discussion

9248.	The X and Y in the given equation respectively are:CH3COOC2H5NaOH−−−−→ X+Y
Answer» The X and Y in the given equation respectively are: $C H_{3} C O O C_{2} H_{5} N a O H - --- \to X + Y$

Discussion

9249.	Find the concentration of solution in terms of weight percent if 10gm of common salt is dissolved in 40gm of water.
Answer» Find the concentration of solution in terms of weight percent if 10gm of common salt is dissolved in 40gm of water.

Discussion

9250.	Why is Henry’s constant inversely proportional to solubility?
Answer» Why is Henry’s constant inversely proportional to solubility?

Discussion

Explore topic-wise InterviewSolutions in .

If BCD and EFG are congruent by SAS congruence postulate and AB = MN, B =N, then which is the additional equality is right to complete the postulate?

31. The rate of a gaseous reaction is given by expression K[A][B].If the volume of the reaction vessel is suddenly reduced to 1/4th of the initial volume,the reaction rate relating to original rate will be

What are allotrophs and what are they used for?

Value of gas constant R is

Write the principle of liquation.

which is incoorect stability order 1.CH2=CH-C^+H2>CH3-CH^+-CH3 2.CH2=CH^+CH3-CH^--CH3 4.CH3C^+H2&gt;CH3O-C^+H2

Which method do you suggest for extraction of highly reactive metals and why?

If n(A) = 7 and n(An B) = 3, then n[(An B)'n A] is

Define the life process of plant?

Does addition of NaCl in AgCN solution affect its solubility??

In (B4O5(OH)4)2− the number of boron atoms having an octet of elelctron is:

Copper is extracted from Copper pyrites by heating in a Bessemer converted. The method is based on the principle that

21 g of nitrogen gas is mixed with 1.2 moles of SO2 gas and 1.21×1023 molecules of O2 gas. Find the volume of the gaseous mixture (assuming no reaction) at STP.

Question 15Pentane has the molecular formula C5H12. It has(a) 5 covalent bonds(b) 12 covalent bonds(c) 16 covalent bonds(d) 17 covalent bonds

Concentrated nitric acid renders iron passive. Give reason. [2 MARKS]

3 In BF3, the B-F bond length is 1.30 A, when BF3, is allowed to be treated with Me3N, it forms an adduct,(Me3N → BF3) The bond length of B-F inthe adduct is(1) Greater than 1.30(3) Equal to 1.30 (2) Smaller than 1.30 A(4) None of these

Which of the following should be correct according to Hund's rule?

Name the allotrope of carbon which has a hexagonal arrangement of atoms.

Which of the following properties in metals are caused by metallic bonding?

Discuss Calgon's method in detail.

Which petroleum product is used in place of coal tar for metalling the roads?

Percentage composition of hydrogen in benzene (C6H6) is :

ntA vessel is filled with a mixture of oxygen and nitrogen. At what ratio of partial pressures will be the mass of gases be identical?n nt(a) P(O2) = 0.78(N2)n nt(b) P(O2) = 8.75(N2)n nt(c) P(O2) = 11.4 (N2)n nt(d) P(O2) = 0.875(N2)n

A. Name the process which increases thermal conductivity of stainless steel cook wares by adding copper. B. In a forest increasing number of herbivores leads to air pollution. Justify. C.What are the advantages of modern periodic table E.The cook wares made by stainless steel are not get rust. Why?

When ethanol is heated with alkaline potassium permanganate solution, it gets converted into ethanoic acid. In this reaction, alkaline potassium permanganate acts as : (a) reducing agent (b) oxidising agent (c) catalyst (d) dehydrating agent

if 1g of sulphur dioxid contain x no.of molecules,what will be the no. of molecules in 1 gram of methane

calculate total no.,shared pairs,unshared pairs and no. of valance electron in Thionyl chloride and draw its lewis structur

Write down the word equation or balanced equation for the action of concentrated nitric acid on copper.

Choose the correct option.

Statement 1: Hydrogen just needs 2 electrons to fill its outermost orbit. Statement 2: The first orbit can occupy only 2 electrons.

69. initial concentration of the reactant is 1M. the concentration becomes 0.9, 0.8, and 0.7M in 2hrs, 4hrs, and 6hrs respectively. then the order of the reaction is

Which of the following oxides of nitrogen is/are colourless ?

Hydrogen is having one electron. To complete its duplet, it should gain one electron. Then it should become Hydride(H- )ion. But how can it loose one electron to form Hydeogen (H+) ion ? Why does it do so as it is gaining no stability ?

What is the effect of Nitric Acid on methyl orange ?

Explain the hybridisation taking place in H2O molecule, which is responsible for its bond formation.

which of the following is used to make toys a) plaster of Paris b) gypsum c) bleaching powder d) calcium carbonate

Explain the gravity separation method.

How could the modern periodic table remove various anomalies of Mendleev‘s periodic table?

Two metal spheres have radii r and 2rand they emitthermal radiation with maximum intensities atwavelengths and 2% respectively. The respectiveratio of the radiant energy emitted by them per secondwill be(1) 4 1(2) 1 4(3) 16 1(4) 8 1

How many litres of O2 at STP are needed for the complete combustion of 80 g of liquid hexane (C6H14)?(Given:C6H14 +O2→CO2 + H2O)

What will be the formula and electron dot structure of Cyclopentane?

The X and Y in the given equation respectively are:CH3COOC2H5NaOH−−−−→ X+Y

Find the concentration of solution in terms of weight percent if 10gm of common salt is dissolved in 40gm of water.

Why is Henry’s constant inversely proportional to solubility?

which is incoorect stability order 1.CH2=CH-C^+H2>CH3-CH^+-CH3 2.CH2=CH^+CH3-CH^--CH3 4.CH3C^+H2>CH3O-C^+H2