7248 + Interview Questions in Chemistry Page 37 InterviewSolution

1801.	when to use bis and tris instead of di,di and tri,tri?
Answer» when to use bis and tris instead of di,di and tri,tri?

Discussion

1802.	Why are sanitary diapers are made of rayon?
Answer» Why are sanitary diapers are made of rayon?

Discussion

1803.	Plot the energy vs reaction coordinate diagram for a hypothetical reaction X-----> Y, the activation energy for the forward and backward reactions are 15 and 9 kJ/mol respectively. The potential energy of X is 10 kJ/mol. Also calculate the heat of reaction, potential energy of Y, threshold energy and nature of reaction (i.e., endothermic or exothermic).
Answer» Plot the energy vs reaction coordinate diagram for a hypothetical reaction X-----> Y, the activation energy for the forward and backward reactions are 15 and 9 kJ/mol respectively. The potential energy of X is 10 kJ/mol. Also calculate the heat of reaction, potential energy of Y, threshold energy and nature of reaction (i.e., endothermic or exothermic).

Discussion

1804.	Which metalloid is the backbone of the electronics industry ? Silicon Germanium Arsenic Antimony
Answer» Which metalloid is the backbone of the electronics industry ? Silicon Germanium Arsenic Antimony

Discussion

1805.	With C4 explosives set, Tom proceeded into the structure. After he retrieves the chip, he needs to activate the C4 and bring the building down.Tom needs to reach the apex [top] of the structure, where the chip was hidden. He had a jet pack which can propel him to reach the height. However, there wasn’t enough fuel in it. Tom needs 12m amount of fuel for the jet pack – he had only 3m amount of fuel left. What is the amount of fuel he needs to multiply to the existing fuel to reach the apex?
Answer» With C4 explosives set, Tom proceeded into the structure. After he retrieves the chip, he needs to activate the C4 and bring the building down.Tom needs to reach the apex [top] of the structure, where the chip was hidden. He had a jet pack which can propel him to reach the height. However, there wasn’t enough fuel in it. Tom needs $12^{m}$ amount of fuel for the jet pack – he had only $3^{m}$ amount of fuel left. What is the amount of fuel he needs to multiply to the existing fuel to reach the apex?

1805.

With C4 explosives set, Tom proceeded into the structure. After he retrieves the chip, he needs to activate the C4 and bring the building down.Tom needs to reach the apex [top] of the structure, where the chip was hidden. He had a jet pack which can propel him to reach the height. However, there wasn’t enough fuel in it. Tom needs 12m amount of fuel for the jet pack – he had only 3m amount of fuel left. What is the amount of fuel he needs to multiply to the existing fuel to reach the apex?

Answer»

With C4 explosives set, Tom proceeded into the structure. After he retrieves the chip, he needs to activate the C4 and bring the building down.Tom needs to reach the apex [top] of the structure, where the chip was hidden. He had a jet pack which can propel him to reach the height. However, there wasn’t enough fuel in it. Tom needs $12^{m}$ amount of fuel for the jet pack – he had only $3^{m}$ amount of fuel left.

What is the amount of fuel he needs to multiply to the existing fuel to reach the apex?

Discussion

1806.	Q62. With reference to Second generation Ethnol production, consider the following statements: 1. India’s first second generation ethnol bio refinery will be setup at Panipat in Punjab by HPCl. 2. They are produced directly from the food crops. Which of the above statement(s) is/are correct?
Answer» Q62. With reference to Second generation Ethnol production, consider the following statements: 1. India’s first second generation ethnol bio refinery will be setup at Panipat in Punjab by HPCl. 2. They are produced directly from the food crops. Which of the above statement(s) is/are correct?

1806.

Q62. With reference to Second generation Ethnol production, consider the following statements: 1. India’s first second generation ethnol bio refinery will be setup at Panipat in Punjab by HPCl. 2. They are produced directly from the food crops. Which of the above statement(s) is/are correct?

Answer»

Q62. With reference to Second generation Ethnol production, consider the following statements:

1. India’s first second generation ethnol bio refinery will be setup at Panipat in Punjab by HPCl.

2. They are produced directly from the food crops.

Which of the above statement(s) is/are correct?

Discussion

1807.	Statement 1: Peat produces less heat and more smoke Statement 2 : The calorific value of peat is between 10.5-14.63 KJ/g.
Answer» Statement 1: Peat produces less heat and more smoke Statement 2 : The calorific value of peat is between 10.5-14.63 KJ/g.

Discussion

1808.	What happens when a aluminium sheet sinked on diluted hydrochloric acid?
Answer» What happens when a aluminium sheet sinked on diluted hydrochloric acid?

Discussion

1809.	Is there anything in this universe without chemistry?
Answer» Is there anything in this universe without chemistry?

Discussion

1810.	What are chemical name of following compounds?1)NaNH4HPO42)Mn3(BO3)23)Ag3AsO34)Ag4P2O75)LiNH26)NaH2PO37)Al(AsO3)
Answer» What are chemical name of following compounds? 1)NaNH4HPO4 2)Mn3(BO3)2 3)Ag3AsO3 4)Ag4P2O7 5)LiNH2 6)NaH2PO3 7)Al(AsO3)

Discussion

1811.	Water can be synthesized by burning _________ in air.
Answer» Water can be synthesized by burning _________ in air.

Discussion

1812.	The volume of gas A is twice than of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressure of the gases for equal number of moles are
Answer» The volume of gas A is twice than of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressure of the gases for equal number of moles are

Discussion

1813.	Earth is known as the blue planet because 71% of the earth's surface is covered with water, but we still face water shortage. What can be the possible reason for this?
Answer» Earth is known as the blue planet because 71% of the earth's surface is covered with water, but we still face water shortage. What can be the possible reason for this?

Discussion

1814.	A plant that takes petroleum and turns it into other useful products is called:
Answer» A plant that takes petroleum and turns it into other useful products is called:

Discussion

1815.	Two metallic oxides contain 27.6% and 30% oxygen .If the formula of the first oxide is X3O4 that of second will be
Answer» Two metallic oxides contain 27.6% and 30% oxygen .If the formula of the first oxide is X3O4 that of second will be

Discussion

1816.	Question 40Generally, when metals are treated with mineral acids, hydrogen gas is liberated but when metals (except Mn and Mg) are treated with HNO3, hydrogen is not liberated. Why?
Answer» Question 40 Generally, when metals are treated with mineral acids, hydrogen gas is liberated but when metals (except Mn and Mg) are treated with ${HNO}_{3}$ , hydrogen is not liberated. Why?

Discussion

1817.	Select appropriate articles for the blanks. _____ professor discussed about ______ effects of pollution on ______ life.
Answer» Select appropriate articles for the blanks. _____ professor discussed about ______ effects of pollution on ______ life.

1817.

Select appropriate articles for the blanks. _ professor discussed about effects of pollution on ____ life.

Answer»

Select appropriate articles for the blanks.

_____ professor discussed about ______ effects of pollution on ______ life.

Discussion

1818.	Energy equivalent of 10.00 cm^{-1} is :a) 2.0×10^{-22}J per photon b)28.6×10^{-3}kcal mol^{-1} photon c)12.0×10^{-2} kJ mol^{-1}photon d)all of the above
Answer» Energy equivalent of 10.00 cm^{-1} is :a) 2.0×10^{-22}J per photon b)28.6×10^{-3}kcal mol^{-1} photon c)12.0×10^{-2} kJ mol^{-1}photon d)all of the above

Discussion

1819.	Which of the given statements are correct about the reaction mentioned below? 2PbO (s)+C (s)→2Pb (s)+CO2 (g) i) Lead is getting reduced ii) Carbon dioxide is getting oxidised iii) Carbon is getting oxidised iv) Lead oxide is getting reduced
Answer» Which of the given statements are correct about the reaction mentioned below? $2 P b O (s) + C (s) \to 2 P b (s) + C O_{2} (g)$ i) Lead is getting reduced ii) Carbon dioxide is getting oxidised iii) Carbon is getting oxidised iv) Lead oxide is getting reduced

Discussion

1820.	(a) Define gram molecular mass of a substance. How much is the gram molecular mass of oxygen?(b) If sulphur exists as S8 Molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)
Answer» (a) Define gram molecular mass of a substance. How much is the gram molecular mass of oxygen? (b) If sulphur exists as S₈ Molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)

Discussion

1821.	Name any three man-made sources of water.
Answer» Name any three man-made sources of water.

Discussion

1822.	The ratio of masses of an element A attached with the fixed mass of another element B in their two compounds is 2 : 3. If 48 mass of A is attached with 24 mass of B in first compound then what mass of A is attached with the 12 mass of B in the second compound ?
Answer» The ratio of masses of an element A attached with the fixed mass of another element B in their two compounds is 2 : 3. If 48 mass of A is attached with 24 mass of B in first compound then what mass of A is attached with the 12 mass of B in the second compound ?

Discussion

1823.	If all the ions from (i) one of the rectangular planes passing through opposite face centres as well as (ii) one of triad axis of symmetry are removed, then which one of the following statements is incorrect? (Ignore charge balance)Formula of NaCl become Na8Cl7Formula of Na2O became Na24O7Formula of ZnS become Zn3S7Formula of CaF2 become Ca7F24
Answer» If all the ions from (i) one of the rectangular planes passing through opposite face centres as well as (ii) one of triad axis of symmetry are removed, then which one of the following statements is incorrect? (Ignore charge balance) Formula of NaCl become Na8Cl7 Formula of Na2O became Na24O7 Formula of ZnS become Zn3S7 Formula of CaF2 become Ca7F24

Discussion

1824.	When a white compound ‘X’ is placed under sunlight, it turns grey. Give the name of the reaction and write the balanced chemical equation.
Answer» When a white compound ‘X’ is placed under sunlight, it turns grey. Give the name of the reaction and write the balanced chemical equation.

Discussion

1825.	Fill in the blanks:a) Plant fibres are obtained from_________ and ________ .b) Animals fibres are __________ and ___________ .
Answer» Fill in the blanks: a) Plant fibres are obtained from_________ and ________ . b) Animals fibres are __________ and ___________ .

Discussion

1826.	13.Why is the total energy of an electron in Bohr's model negative?
Answer» 13.Why is the total energy of an electron in Bohr's model negative?

Discussion

1827.	What is the difference between alkyl aryl halide and aryl alkyl halide .
Answer» What is the difference between alkyl aryl halide and aryl alkyl halide .

Discussion

1828.	Which element is present in the onion
Answer» Which element is present in the onion

Discussion

1829.	Question 7Which of the following is not a greenhouse gas?a) Carbon dioxideb) Sulphur dioxidec) Methane d) Nitrogen
Answer» Question 7 Which of the following is not a greenhouse gas? a) Carbon dioxide b) Sulphur dioxide c) Methane d) Nitrogen

Discussion

1830.	7. 600 ml of a mixture of CO and carbon dioxide weigh 1 gram at NTP. What is the volume of Carbon dioxide in mixture at NTP?
Answer» 7. 600 ml of a mixture of CO and carbon dioxide weigh 1 gram at NTP. What is the volume of Carbon dioxide in mixture at NTP?

Discussion

1831.	39.Work done in an open easel at 300K when 56g of iron reacts with dilute HCl is (in cal) 1)600 2)300 3)150 4)100
Answer» 39.Work done in an open easel at 300K when 56g of iron reacts with dilute HCl is (in cal) 1)600 2)300 3)150 4)100

Discussion

1832.	In the given electric circuit, the bulb will glow when is added to water.
Answer» In the given electric circuit, the bulb will glow when is added to water.

Discussion

1833.	Question 11Generally, metallic oxides are basic and non-metallic oxides are acidic in nature. The solution of which of the following oxides in water will change the colour of blue litmus to red?(a) sulphur dioxide(b) magnesium oxide(c) iron oxide(d) copper oxide
Answer» Question 11 Generally, metallic oxides are basic and non-metallic oxides are acidic in nature. The solution of which of the following oxides in water will change the colour of blue litmus to red? (a) sulphur dioxide (b) magnesium oxide (c) iron oxide (d) copper oxide

Discussion

1834.	What are alpha particles?
Answer» What are alpha particles?

Discussion

1835.	An unielectronic ion of element A (atomic number of element 'A' is 'n') has velocity of electron in x^{th }orbit equal to velocity of electron in H-atom in nth orbit. Group number of element A in modern periodic is \lbrack if kinetic energy of electron in H-atom in x^{th} orbit is more than 0.2125 eV/atom and x≠ n\rbrack
Answer» An unielectronic ion of element A (atomic number of element 'A' is 'n') has velocity of electron in x^{th }orbit equal to velocity of electron in H-atom in nth orbit. Group number of element A in modern periodic is \lbrack if kinetic energy of electron in H-atom in x^{th} orbit is more than 0.2125 eV/atom and x≠ n\rbrack

Discussion

1836.	Which of the solution will not conduct electricity?
Answer» Which of the solution will not conduct electricity?

Discussion

1837.	A reaction in which a single product is formed from two or more reactants is known as __ reaction.
Answer» A reaction in which a single product is formed from two or more reactants is known as __ reaction.

Discussion

1838.	19. What is Fittig reaction?
Answer» 19. What is Fittig reaction?

Discussion

1839.	110ml of N/2 HCl, 20 ml of M/5 H2SO4,20 ml of N/4 H3PO4 are mixed together.The volume of water that must be added to make a 0.18N solution is(assume there is no change in volume on mixing)
Answer» 110ml of N/2 HCl, 20 ml of M/5 H2SO4,20 ml of N/4 H3PO4 are mixed together.The volume of water that must be added to make a 0.18N solution is(assume there is no change in volume on mixing)

Discussion

1840.	Pauling's electronegativity values for elements are useful in predicting?
Answer» Pauling's electronegativity values for elements are useful in predicting?

Discussion

1841.	Stainless steel vessels in kitchen have copper coating on the bottom .give reason.
Answer» Stainless steel vessels in kitchen have copper coating on the bottom .give reason.

Discussion

1842.	Draw the electron dot structure of a H2S molecule. [1 Mark]
Answer» Draw the electron dot structure of a $H_{2} S$ molecule. [1 Mark]

Discussion

1843.	Mg(s)+HCl(aq)----> K(s)+H2SO4(aq)----> Ah(s)+H3PO4(aq)---->
Answer» Mg(s)+HCl(aq)----> K(s)+H2SO4(aq)----> Ah(s)+H3PO4(aq)---->

Discussion

1844.	What is formula for mohr's salt
Answer» What is formula for mohr's salt

Discussion

1845.	The oxides of which type of metal can be reduced by just heating?
Answer» The oxides of which type of metal can be reduced by just heating?

Discussion

1846.	Question 4 (c) Least polluting fuel for the vehicle is ___________.
Answer» Question 4 (c) Least polluting fuel for the vehicle is ___________.

Discussion

1847.	Define a chemical formula. What is the chemical formula of sulphuric acid and Sodium hydroxide?
Answer» Define a chemical formula. What is the chemical formula of sulphuric acid and Sodium hydroxide?

Discussion

1848.	What is the total hardness of water containing 68 ppm of CaSO4 and 19 ppm of MgCl2 ?
Answer» What is the total hardness of water containing 68 ppm of $C a S O_{4}$ and 19 ppm of $M g C l_{2}$ ?

Discussion

1849.	Which of the following properties is/are exhibited by the metals?
Answer» Which of the following properties is/are exhibited by the metals?

Discussion

1850.	a mine worker measures his weight inside a mine and finds that it has dercreased by 0.05%of that on the surface of the earth. then,find the deth of the mine
Answer» a mine worker measures his weight inside a mine and finds that it has dercreased by 0.05%of that on the surface of the earth. then,find the deth of the mine

Discussion

Explore topic-wise InterviewSolutions in .

when to use bis and tris instead of di,di and tri,tri?

Why are sanitary diapers are made of rayon?

Which metalloid is the backbone of the electronics industry ?​​​​​ Silicon Germanium Arsenic Antimony

Q62. With reference to Second generation Ethnol production, consider the following statements: 1. India’s first second generation ethnol bio refinery will be setup at Panipat in Punjab by HPCl. 2. They are produced directly from the food crops. Which of the above statement(s) is/are correct?

Statement 1: Peat produces less heat and more smoke Statement 2 : The calorific value of peat is between 10.5-14.63 KJ/g.

What happens when a aluminium sheet sinked on diluted hydrochloric acid?

Is there anything in this universe without chemistry?

What are chemical name of following compounds?1)NaNH4HPO42)Mn3(BO3)23)Ag3AsO34)Ag4P2O75)LiNH26)NaH2PO37)Al(AsO3)

Water can be synthesized by burning _________ in air.

The volume of gas A is twice than of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressure of the gases for equal number of moles are

Earth is known as the blue planet because 71% of the earth's surface is covered with water, but we still face water shortage. What can be the possible reason for this?

A plant that takes petroleum and turns it into other useful products is called:

Two metallic oxides contain 27.6% and 30% oxygen .If the formula of the first oxide is X3O4 that of second will be

Question 40Generally, when metals are treated with mineral acids, hydrogen gas is liberated but when metals (except Mn and Mg) are treated with HNO3, hydrogen is not liberated. Why?

Select appropriate articles for the blanks. _____ professor discussed about ______ effects of pollution on ______ life.

Energy equivalent of 10.00 cm^{-1} is :a) 2.0×10^{-22}J per photon b)28.6×10^{-3}kcal mol^{-1} photon c)12.0×10^{-2} kJ mol^{-1}photon d)all of the above

Which of the given statements are correct about the reaction mentioned below? 2PbO (s)+C (s)→2Pb (s)+CO2 (g) i) Lead is getting reduced ii) Carbon dioxide is getting oxidised iii) Carbon is getting oxidised iv) Lead oxide is getting reduced

(a) Define gram molecular mass of a substance. How much is the gram molecular mass of oxygen?(b) If sulphur exists as S8 Molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)

Name any three man-made sources of water.

The ratio of masses of an element A attached with the fixed mass of another element B in their two compounds is 2 : 3. If 48 mass of A is attached with 24 mass of B in first compound then what mass of A is attached with the 12 mass of B in the second compound ?

When a white compound ‘X’ is placed under sunlight, it turns grey. Give the name of the reaction and write the balanced chemical equation.

Fill in the blanks:a) Plant fibres are obtained from_________ and ________ .b) Animals fibres are __________ and ___________ .

13.Why is the total energy of an electron in Bohr's model negative?

What is the difference between alkyl aryl halide and aryl alkyl halide .

Which element is present in the onion

Question 7Which of the following is not a greenhouse gas?a) Carbon dioxideb) Sulphur dioxidec) Methane d) Nitrogen

7. 600 ml of a mixture of CO and carbon dioxide weigh 1 gram at NTP. What is the volume of Carbon dioxide in mixture at NTP?

39.Work done in an open easel at 300K when 56g of iron reacts with dilute HCl is (in cal) 1)600 2)300 3)150 4)100

In the given electric circuit, the bulb will glow when is added to water.

Question 11Generally, metallic oxides are basic and non-metallic oxides are acidic in nature. The solution of which of the following oxides in water will change the colour of blue litmus to red?(a) sulphur dioxide(b) magnesium oxide(c) iron oxide(d) copper oxide

What are alpha particles?

Which of the solution will not conduct electricity?

A reaction in which a single product is formed from two or more reactants is known as __ reaction.

19. What is Fittig reaction?

110ml of N/2 HCl, 20 ml of M/5 H2SO4,20 ml of N/4 H3PO4 are mixed together.The volume of water that must be added to make a 0.18N solution is(assume there is no change in volume on mixing)

Pauling's electronegativity values for elements are useful in predicting?

Stainless steel vessels in kitchen have copper coating on the bottom .give reason.

Draw the electron dot structure of a H2S molecule. [1 Mark]

Mg(s)+HCl(aq)----> K(s)+H2SO4(aq)----> Ah(s)+H3PO4(aq)---->

What is formula for mohr's salt

The oxides of which type of metal can be reduced by just heating?

Question 4 (c) Least polluting fuel for the vehicle is ___________.

Define a chemical formula. What is the chemical formula of sulphuric acid and Sodium hydroxide?

What is the total hardness of water containing 68 ppm of CaSO4 and 19 ppm of MgCl2 ?

Which of the following properties is/are exhibited by the metals?

a mine worker measures his weight inside a mine and finds that it has dercreased by 0.05%of that on the surface of the earth. then,find the deth of the mine

Which metalloid is the backbone of the electronics industry ? Silicon Germanium Arsenic Antimony

Select appropriate articles for the blanks. _ professor discussed about effects of pollution on ____ life.

Fill in the blanks:a) Plant fibres are obtained from_ and .b) Animals fibres are and _____ .