10223 + Interview Questions in Chemistry Page 46 InterviewSolution

2251.	A certain compound has the molecular formula X4O6. if 10g of X4O6, has 5.72g ofX. Atomic mass of X is: (1) 32 amu(3) 42 amu(2) 37 amu(4) 98 amu
Answer» A certain compound has the molecular formula X4O6. if 10g of X4O6, has 5.72g ofX. Atomic mass of X is: (1) 32 amu(3) 42 amu(2) 37 amu(4) 98 amu

Discussion

2252.	According to J.J Thomson, an atom is a positively charged sphere. Which sub-atomic particles is embedded in it?
Answer» According to J.J Thomson, an atom is a positively charged sphere. Which sub-atomic particles is embedded in it?

Discussion

2253.	how does the conductivity and molar conductivity varies with concentration
Answer» how does the conductivity and molar conductivity varies with concentration

Discussion

2254.	Here are some notes which you could use to write a report. 21 August 2005 — original handwritten manuscript of Albert Einstein unearthed — by student Rowdy Boeynik in the University of the Netherlands — Boeynik researching papers — papers belonging to an old friend of Einstein — fingerprints of Einstein on these papers — 16-page document dated 1924 — Einstein’s work on this last theory — behaviour of atoms at low temperature — now known as the Bose-Einstein condensation — the manuscript to be kept at Leyden University where Einstein got the Nobel Prize. Write a report which has four paragraphs, one each on: • What was unearthed. • Who unearthed it and when. • What the document contained. • Where it will be kept. Your report could begin like this: Student Unearths Einstein Manuscript 21 AUGUST 2005. An original handwritten Albert Einstein manuscript has been unearthed at a university in the Netherlands …
Answer» Here are some notes which you could use to write a report. 21 August 2005 — original handwritten manuscript of Albert Einstein unearthed — by student Rowdy Boeynik in the University of the Netherlands — Boeynik researching papers — papers belonging to an old friend of Einstein — fingerprints of Einstein on these papers — 16-page document dated 1924 — Einstein’s work on this last theory — behaviour of atoms at low temperature — now known as the Bose-Einstein condensation — the manuscript to be kept at Leyden University where Einstein got the Nobel Prize. Write a report which has four paragraphs, one each on: • What was unearthed. • Who unearthed it and when. • What the document contained. • Where it will be kept. Your report could begin like this: Student Unearths Einstein Manuscript 21 AUGUST 2005. An original handwritten Albert Einstein manuscript has been unearthed at a university in the Netherlands …

2254.

Here are some notes which you could use to write a report. 21 August 2005 — original handwritten manuscript of Albert Einstein unearthed — by student Rowdy Boeynik in the University of the Netherlands — Boeynik researching papers — papers belonging to an old friend of Einstein — fingerprints of Einstein on these papers — 16-page document dated 1924 — Einstein’s work on this last theory — behaviour of atoms at low temperature — now known as the Bose-Einstein condensation — the manuscript to be kept at Leyden University where Einstein got the Nobel Prize. Write a report which has four paragraphs, one each on: • What was unearthed. • Who unearthed it and when. • What the document contained. • Where it will be kept. Your report could begin like this: Student Unearths Einstein Manuscript 21 AUGUST 2005. An original handwritten Albert Einstein manuscript has been unearthed at a university in the Netherlands …

Answer»

Here are some notes which you could use to write a report.

21 August 2005 — original handwritten manuscript of Albert Einstein unearthed — by student Rowdy Boeynik in the University of the Netherlands — Boeynik researching papers — papers belonging to an old friend of Einstein — fingerprints of Einstein on these papers — 16-page document dated 1924 — Einstein’s work on this last theory — behaviour of atoms at low temperature — now known as the Bose-Einstein condensation — the manuscript to be kept at Leyden University where Einstein got the Nobel Prize.

Write a report which has four paragraphs, one each on:

• What was unearthed.

• Who unearthed it and when.

• What the document contained.

• Where it will be kept.

Your report could begin like this:

Student Unearths Einstein Manuscript

21 AUGUST 2005. An original handwritten Albert Einstein manuscript has been unearthed at a university in the Netherlands …

Discussion

2255.	Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.
Answer» Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.

Discussion

2256.	Consider the following sets of quantum numbers: n l m s (a) 3 0 0 + 12 (b) 2 2 1 + 12 (c) 4 3 -2 - 12 (d) 1 0 -1 - 12 (e) 3 2 3 + 12 Which of the following sets of quantum number is not possible?
Answer» Consider the following sets of quantum numbers: n l m s (a) 3 0 0 + $\frac{1}{2}$ (b) 2 2 1 + $\frac{1}{2}$ (c) 4 3 -2 - $\frac{1}{2}$ (d) 1 0 -1 - $\frac{1}{2}$ (e) 3 2 3 + $\frac{1}{2}$ Which of the following sets of quantum number is not possible?

Discussion

2257.	Rearrange the following as biodegradable and non biodegradableGlass, rubber, Metal, Food, Garden waste, Plastic, Wood
Answer» Rearrange the following as biodegradable and non biodegradable Glass, rubber, Metal, Food, Garden waste, Plastic, Wood

2257.

Rearrange the following as biodegradable and non biodegradableGlass, rubber, Metal, Food, Garden waste, Plastic, Wood

Answer»

Rearrange the following as biodegradable and non biodegradable

Glass, rubber, Metal, Food, Garden waste, Plastic, Wood

Discussion

2258.	The element which is not common between the compounds called baking soda and soda ash is (a) sodium (b) hydrogen (c) oxygen (d) carbon
Answer» The element which is not common between the compounds called baking soda and soda ash is (a) sodium (b) hydrogen (c) oxygen (d) carbon

2258.

The element which is not common between the compounds called baking soda and soda ash is (a) sodium (b) hydrogen (c) oxygen (d) carbon

Answer»

The element which is not common between the compounds called baking soda and soda ash is

(a) sodium (b) hydrogen (c) oxygen (d) carbon

Discussion

2259.	What is the coordination number of spinel crystals and Inverse spinel?
Answer» What is the coordination number of spinel crystals and Inverse spinel?

Discussion

2260.	Which of the following metal replaces hydrogen from dilute acid with explosive violence?
Answer» Which of the following metal replaces hydrogen from dilute acid with explosive violence?

Discussion

2261.	36.What are isomorphous salts?
Answer» 36.What are isomorphous salts?

Discussion

2262.	Pizza is a ____ mixture of dough, sauce, cheese, and other toppings.
Answer» Pizza is a ____ mixture of dough, sauce, cheese, and other toppings.

Discussion

2263.	Define the following terms:(a) Efflorescence(b) Hygroscopy(c) Water of crystallisation.
Answer» Define the following terms: (a) Efflorescence (b) Hygroscopy (c) Water of crystallisation.

Discussion

2264.	42 Which is a polar molecule? 1) XeF4 2) BF3 3) I2Cl6 4) PCl2F3
Answer» 42 Which is a polar molecule? 1) XeF4 2) BF3 3) I2Cl6 4) PCl2F3

Discussion

2265.	Which element 's ionic radius smaller than its atomic radius?
Answer» Which element 's ionic radius smaller than its atomic radius?

Discussion

2266.	Why does wavy curve method works?
Answer» Why does wavy curve method works?

Discussion

2267.	45. water is added to the solution M such that the mole fraction of water in the solution becomes 0.9 the booling point of this solution is a) 380.4 k b) 376.2 k c) 375.5 k d) 354.7 k
Answer» 45. water is added to the solution M such that the mole fraction of water in the solution becomes 0.9 the booling point of this solution is a) 380.4 k b) 376.2 k c) 375.5 k d) 354.7 k

Discussion

2268.	What is absolute 0°K temperature?
Answer» What is absolute 0°K temperature?

Discussion

2269.	which ids stronger acid phenol or cresol
Answer» which ids stronger acid phenol or cresol

Discussion

2270.	Calculate the formula masses of the following compounds: (i) Sodium oxide, Na2O (ii) Aluminium oxide, Al2O3 (Given: Atomic masses : Na = 23 u; O = 16 u; Al = 27 u)
Answer» Calculate the formula masses of the following compounds: (i) Sodium oxide, $N a_{2} O$ (ii) Aluminium oxide, $A l_{2} O_{3}$ (Given: Atomic masses : Na = 23 u; O = 16 u; Al = 27 u)

Discussion

2271.	9 Assertion : 1 mole H2 has same mass as 1 mole D2 Reason : 1 mole H2 and D2 contain different number of atom
Answer» 9 Assertion : 1 mole H2 has same mass as 1 mole D2 Reason : 1 mole H2 and D2 contain different number of atom

Discussion

2272.	When 22.4 L of C4H8 at STP is burnt completely, 89.6 L of CO2 gas at STP and 72 g of water are produced. The volume of the oxygen gas at STP consumed in the reaction is closest to :
Answer» When 22.4 L of C $_{4}$ H $_{8}$ at STP is burnt completely, 89.6 L of CO $_{2}$ gas at STP and 72 g of water are produced. The volume of the oxygen gas at STP consumed in the reaction is closest to :

Discussion

2273.	34. How to calculate gram atom?
Answer» 34. How to calculate gram atom?

Discussion

2274.	1. the electronic configuration of a dipositive ion M^{2+} is2 ,8,14 and its atomic mass is 56. wht is the number of neutrons in its nucleus? 2. Find the no of electrons, neutrons and atomic number in Mg^{2+} in which number of protons is 12 and mass number is 24
Answer» 1. the electronic configuration of a dipositive ion M^{2+} is2 ,8,14 and its atomic mass is 56. wht is the number of neutrons in its nucleus? 2. Find the no of electrons, neutrons and atomic number in Mg^{2+} in which number of protons is 12 and mass number is 24

Discussion

2275.	mnemonics for the first 18 elements
Answer» mnemonics for the first 18 elements

Discussion

2276.	Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No metal is plastic. II. All notes are plastics.
Answer» Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No metal is plastic. II. All notes are plastics.

2276.

Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No metal is plastic. II. All notes are plastics.

Answer»

Statements: No note is a coin.

Some coins are metals.

All plastics are notes.

Conclusions: I. No metal is plastic.

II. All notes are plastics.

Discussion

2277.	For the reactionAl+O2→Al2O354 g of Al is reacted with 67.4 litre of O2 at STP. 76.5 g of Al2O3 was obtained. The percentage yield of the product obtained is
Answer» For the reaction $A l + O_{2} \to A l_{2} O_{3}$ $54 g$ of $A l$ is reacted with $67.4$ litre of $O_{2}$ at STP. $76.5 g$ of $A l_{2} O_{3}$ was obtained. The percentage yield of the product obtained is

Discussion

2278.	In a double displacement reaction, how many reactants exchange their respective ions to form new products?2
Answer» In a double displacement reaction, how many reactants exchange their respective ions to form new products? 2

Discussion

2279.	9.ab_a_bb_ _a_ _bbb_cc(1) caccaac (2) acccacc(3) cacacaac (4) caccaab
Answer» 9.ab_a_bb_ _a_ _bbb_cc (1) caccaac (2) acccacc (3) cacacaac (4) caccaab

Discussion

2280.	What is a molecule made up of? Give one example each for a molecule of an element and a molecule of a compound. The formula of the chlorine molecule is Cl2 and not 2Cl. Justify.
Answer» What is a molecule made up of? Give one example each for a molecule of an element and a molecule of a compound. The formula of the chlorine molecule is ${C l}_{2}$ and not 2Cl. Justify.

Discussion

2281.	What is the difference between molecules and elements ?
Answer» What is the difference between molecules and elements ?

Discussion

2282.	Question 33The visible universe is estimated to contain 1022 stars. How many moles of stars are present in the visible universe?
Answer» Question 33 The visible universe is estimated to contain 10²² stars. How many moles of stars are present in the visible universe?

Discussion

2283.	When metal X reacts with dilute HCl, bubbles of gas Y are formed. Moreover, when this metal X reacts with cold water, it will again produce gas Y. Identify X and Y.
Answer» When metal X reacts with dilute $HCl$ , bubbles of gas Y are formed. Moreover, when this metal X reacts with cold water, it will again produce gas Y. Identify X and Y.

Discussion

2284.	Explain the following : Two jars of H2 Are collected -"one burns quietly and the other does not".
Answer» Explain the following : Two jars of H₂Are collected -"one burns quietly and the other does not".

Discussion

2285.	The mass of an electron is
Answer» The mass of an electron is

Discussion

2286.	Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
Answer» Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?

Discussion

2287.	2. Calculate the amount of sugar present in 340 gram of 15% weight by weight aqueous sugar solution
Answer» 2. Calculate the amount of sugar present in 340 gram of 15% weight by weight aqueous sugar solution

Discussion

2288.	An atom A having radius R constitutes on h.c.p unit cell. What will be the distance between two layers of atoms?
Answer» An atom A having radius R constitutes on h.c.p unit cell. What will be the distance between two layers of atoms?

Discussion

2289.	How to learn a periodic table? And what I should learn in periodic table?
Answer» How to learn a periodic table? And what I should learn in periodic table?

Discussion

2290.	Name two properties of a substance to check its purity?
Answer» Name two properties of a substance to check its purity?

Discussion

2291.	155. 4 kg of ice at-20^° C is mixed with 10 kg of water at20^° C in an insulating vessel having a negligible heatcapacity. Calculate the final mass of water remainingin the container. Given: Specific heat capacities ofwater and ice are 4.184 kJK^{-1}kg^{-1} and 2.092 kJ K^{-1}kg^{-1}, respectively. Molar enthalpy of fusion of ice is334.7 kJ kg^-
Answer» 155. 4 kg of ice at-20^° C is mixed with 10 kg of water at20^° C in an insulating vessel having a negligible heatcapacity. Calculate the final mass of water remainingin the container. Given: Specific heat capacities ofwater and ice are 4.184 kJK^{-1}kg^{-1} and 2.092 kJ K^{-1}kg^{-1}, respectively. Molar enthalpy of fusion of ice is334.7 kJ kg^-

Discussion

2292.	Buckminsterfullerene is aromatic or semi aromatic?
Answer» Buckminsterfullerene is aromatic or semi aromatic?

Discussion

2293.	Which of the following mixtures is referred to as water gas?
Answer» Which of the following mixtures is referred to as water gas?

Discussion

2294.	why volume of gas increases and it is difficult to liquify the gas when compressibility factor is greater than
Answer» why volume of gas increases and it is difficult to liquify the gas when compressibility factor is greater than

Discussion

2295.	Why law of definite proportion is not valid for 4g of H2 and 32g of oxygen
Answer» Why law of definite proportion is not valid for 4g of H2 and 32g of oxygen

Discussion

2296.	The work done in an open vessel at 300k,when 56g iron react with dilute HCL is
Answer» The work done in an open vessel at 300k,when 56g iron react with dilute HCL is

Discussion

2297.	______________ is the reverse of vaporization.
Answer» ______________ is the reverse of vaporization.

Discussion

2298.	A scientist found that two samples of the same compound had the same elements combined in different ratios. Was the finding correct?
Answer» A scientist found that two samples of the same compound had the same elements combined in different ratios. Was the finding correct?

Discussion

2299.	Why should the acid to be used for the lab preparation of H2S be non-oxidizing?(Considering that we are using H2SO4 and FeS)
Answer» Why should the acid to be used for the lab preparation of H2S be non-oxidizing?(Considering that we are using H2SO4 and FeS)

Discussion

2300.	what ia the difference between a molecular and a chemical formula??
Answer» what ia the difference between a molecular and a chemical formula??

Discussion

Explore topic-wise InterviewSolutions in .

A certain compound has the molecular formula X4O6. if 10g of X4O6, has 5.72g ofX. Atomic mass of X is: (1) 32 amu(3) 42 amu(2) 37 amu(4) 98 amu

According to J.J Thomson, an atom is a positively charged sphere. Which sub-atomic particles is embedded in it?

how does the conductivity and molar conductivity varies with concentration

Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.

Consider the following sets of quantum numbers: n l m s (a) 3 0 0 + 12 (b) 2 2 1 + 12 (c) 4 3 -2 - 12 (d) 1 0 -1 - 12 (e) 3 2 3 + 12 Which of the following sets of quantum number is not possible?

Rearrange the following as biodegradable and non biodegradableGlass, rubber, Metal, Food, Garden waste, Plastic, Wood

The element which is not common between the compounds called baking soda and soda ash is (a) sodium (b) hydrogen (c) oxygen (d) carbon

What is the coordination number of spinel crystals and Inverse spinel?

Which of the following metal replaces hydrogen from dilute acid with explosive violence?

36.What are isomorphous salts?

Pizza is a ____ mixture of dough, sauce, cheese, and other toppings.

Define the following terms:(a) Efflorescence(b) Hygroscopy(c) Water of crystallisation.

42 Which is a polar molecule? 1) XeF4 2) BF3 3) I2Cl6 4) PCl2F3

Which element 's ionic radius smaller than its atomic radius?

Why does wavy curve method works?

45. water is added to the solution M such that the mole fraction of water in the solution becomes 0.9 the booling point of this solution is a) 380.4 k b) 376.2 k c) 375.5 k d) 354.7 k

What is absolute 0°K temperature?

which ids stronger acid phenol or cresol

Calculate the formula masses of the following compounds: (i) Sodium oxide, Na2O (ii) Aluminium oxide, Al2O3 (Given: Atomic masses : Na = 23 u; O = 16 u; Al = 27 u)

9 Assertion : 1 mole H2 has same mass as 1 mole D2 Reason : 1 mole H2 and D2 contain different number of atom

When 22.4 L of C4H8 at STP is burnt completely, 89.6 L of CO2 gas at STP and 72 g of water are produced. The volume of the oxygen gas at STP consumed in the reaction is closest to :

34. How to calculate gram atom?

1. the electronic configuration of a dipositive ion M^{2+} is2 ,8,14 and its atomic mass is 56. wht is the number of neutrons in its nucleus? 2. Find the no of electrons, neutrons and atomic number in Mg^{2+} in which number of protons is 12 and mass number is 24

mnemonics for the first 18 elements

Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No metal is plastic. II. All notes are plastics.

For the reactionAl+O2→Al2O354 g of Al is reacted with 67.4 litre of O2 at STP. 76.5 g of Al2O3 was obtained. The percentage yield of the product obtained is

In a double displacement reaction, how many reactants exchange their respective ions to form new products?2

9.ab_a_bb_ _a_ _bbb_cc(1) caccaac (2) acccacc(3) cacacaac (4) caccaab

What is a molecule made up of? Give one example each for a molecule of an element and a molecule of a compound. The formula of the chlorine molecule is Cl2 and not 2Cl. Justify.

What is the difference between molecules and elements ? ​​​​​

Question 33The visible universe is estimated to contain 1022 stars. How many moles of stars are present in the visible universe?

When metal X reacts with dilute HCl, bubbles of gas Y are formed. Moreover, when this metal X reacts with cold water, it will again produce gas Y. Identify X and Y.

Explain the following : Two jars of H2 Are collected -"one burns quietly and the other does not".

The mass of an electron is

Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?

2. Calculate the amount of sugar present in 340 gram of 15% weight by weight aqueous sugar solution

An atom A having radius R constitutes on h.c.p unit cell. What will be the distance between two layers of atoms?

How to learn a periodic table? And what I should learn in periodic table?

Name two properties of a substance to check its purity?

Buckminsterfullerene is aromatic or semi aromatic?

Which of the following mixtures is referred to as water gas?

why volume of gas increases and it is difficult to liquify the gas when compressibility factor is greater than

Why law of definite proportion is not valid for 4g of H2 and 32g of oxygen

The work done in an open vessel at 300k,when 56g iron react with dilute HCL is

______________ is the reverse of vaporization.

A scientist found that two samples of the same compound had the same elements combined in different ratios. Was the finding correct?

Why should the acid to be used for the lab preparation of H2S be non-oxidizing?(Considering that we are using H2SO4 and FeS)

what ia the difference between a molecular and a chemical formula??

What is the difference between molecules and elements ?