15280 + Interview Questions in Chemistry Page 123 InterviewSolution

6101.

Complete the given table: Test Observation Conclusion (i) To solution A, barium chloride solution and dil. HCl were added. (i) Solution A contains SO42− ions. (ii) To solution B, NaOH solution was added. (ii) Solution B contains Fe3+ ions. (iii) To solution C, NH4OH was added slowly till it was in excess. (iii) Solution C contains Cu2+ ions. (iv) To solution D, AgNO3 solution and dil. HNO3 acid were added. (iv) Solution D contains Cl− ions.

Answer» Complete the given table:

	Test	Observation	Conclusion
(i)	To solution A, barium chloride solution and dil. HCl were added.	(i)	Solution A contains SO₄²⁻ ions.
(ii)	To solution B, NaOH solution was added.	(ii)	Solution B contains Fe³⁺ ions.
(iii)	To solution C, NH₄OH was added slowly till it was in excess.	(iii)	Solution C contains Cu²⁺ ions.
(iv)	To solution D, AgNO₃ solution and dil. HNO₃ acid were added.	(iv)	Solution D contains Cl⁻ ions.

Discussion

6102.	An electron has magnetic quantum number is-3 ita principal quantum number is
Answer» An electron has magnetic quantum number is-3 ita principal quantum number is

Discussion

6103.	A nucleas of mass no. 220 decays by alpha decay. The energy released in the reaction is 5 Mev. K.E. of alpha particle is
Answer» A nucleas of mass no. 220 decays by alpha decay. The energy released in the reaction is 5 Mev. K.E. of alpha particle is

Discussion

6104.	42. At infinite dilution how molarity is equal to solubility
Answer» 42. At infinite dilution how molarity is equal to solubility

Discussion

6105.	The emf of a Daniel cell at 298K is E1:Zn/ZnSO4(0.01M)//CuSO4(1M)/Cu .When the concentration of ZnSO4 is 1M and that of CuSO4 is0.01M ,the emf changed to E2.What is the relationship between E1 and E2?Options:1)E1>E2. 2)E1
Answer» The emf of a Daniel cell at 298K is E1:Zn/ZnSO4(0.01M)//CuSO4(1M)/Cu .When the concentration of ZnSO4 is 1M and that of CuSO4 is0.01M ,the emf changed to E2.What is the relationship between E1 and E2?Options:1)E1>E2. 2)E1

Discussion

6106.	Which feature of ammonia leads to the formation of ammonium ion when dissolved in water?
Answer» Which feature of ammonia leads to the formation of ammonium ion when dissolved in water?

Discussion

6107.	94.HOW TO FIND GROUP NUMBER OF AN ELEMENT WHOSE LAST ELECTRON LIE IN THE d ORBITAL.WRITE THE FORMULA TO EXPLAIN.
Answer» 94.HOW TO FIND GROUP NUMBER OF AN ELEMENT WHOSE LAST ELECTRON LIE IN THE d ORBITAL.WRITE THE FORMULA TO EXPLAIN.

Discussion

6108.	What is pH?
Answer» What is pH?

Discussion

6109.	3.42 g of sucrose are dissolved in 18 g of water in a beaker. The number of oxygen atoms in the solution are(a) 6.68×1023(b) 6.09×1022(c) 6.022×1023(d) 6.022×1021
Answer» 3.42 g of sucrose are dissolved in 18 g of water in a beaker. The number of oxygen atoms in the solution are (a) $6.68 \times 10^{23}$ (b) $6.09 \times 10^{22}$ (c) $6.022 \times 10^{23}$ (d) $6.022 \times 10^{21}$

Discussion

6110.	A __ series of carbon compounds has a different number of carbon atoms but contain the same functional group.
Answer» A __ series of carbon compounds has a different number of carbon atoms but contain the same functional group.

Discussion

6111.	Why wasn't hydrogen given a fixed position in Mendeleev’s Periodic Table? [1 MARK]
Answer» Why wasn't hydrogen given a fixed position in Mendeleev’s Periodic Table? [1 MARK]

Discussion

6112.	Write whether the following statement is true or false?‘Clusters of atoms that act as an ion are called monatomic ions.‘
Answer» Write whether the following statement is true or false? ‘Clusters of atoms that act as an ion are called monatomic ions.‘

6112.

Write whether the following statement is true or false?‘Clusters of atoms that act as an ion are called monatomic ions.‘

Answer»

Write whether the following statement is true or false?

‘Clusters of atoms that act as an ion are called monatomic ions.‘

Discussion

6113.	If a given sample of pure iron gains 10% of its weight on partially rusting to form Fe2O3, what fraction of the iron would have been converted ? (Fe = 56)
Answer» If a given sample of pure iron gains 10% of its weight on partially rusting to form Fe2O3, what fraction of the iron would have been converted ? (Fe = 56)

Discussion

6114.	What is the reaction between propene and Br.CCl3 in the presence of sunlight. Which radical so formed attacks first on propene and why. Give full explanation
Answer» What is the reaction between propene and Br.CCl3 in the presence of sunlight. Which radical so formed attacks first on propene and why. Give full explanation

Discussion

6115.	Based on the structure of I2Cl6, find the number of atoms lying in one plane.[1 Mark]
Answer» Based on the structure of $I_{2} C l_{6},$ find the number of atoms lying in one plane. [1 Mark]

Discussion

6116.	16. How many atoms of carbon are present in a diamond weighing 0.5 carot ? (One carot weighs 200mg and assume the diamond to be pure carbon )
Answer» 16. How many atoms of carbon are present in a diamond weighing 0.5 carot ? (One carot weighs 200mg and assume the diamond to be pure carbon )

Discussion

6117.	Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not.
Answer» Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not.

Discussion

6118.	18. Calculate the enthalpy of hydrogenation of C2H2(g) to C2H4(g). Given bond energies : C–H = 414.0 kJ/mol, C C = 827.6 kJ/mol, C=C = 606.0 kJ/mol, H–H = 430.5 kJ/mol.
Answer» 18. Calculate the enthalpy of hydrogenation of C2H2(g) to C2H4(g). Given bond energies : C–H = 414.0 kJ/mol, C C = 827.6 kJ/mol, C=C = 606.0 kJ/mol, H–H = 430.5 kJ/mol.

Discussion

6119.	What happens when carbon and its compounds are burnt in the presence of oxygen?
Answer» What happens when carbon and its compounds are burnt in the presence of oxygen?

Discussion

6120.	Specific conductance of decimolar solution of potassium chloride 18 ∘C is 1.12 S m−1. The resistance of a conductivity cell containing the solution at 18 ∘C was found to be 55 ohm. What is the value of the cell constant?
Answer» Specific conductance of decimolar solution of potassium chloride $18^{\circ} C$ is $1.12 S m^{- 1}$ . The resistance of a conductivity cell containing the solution at $18^{\circ} C$ was found to be $55 o h m$ . What is the value of the cell constant?

Discussion

6121.	250ml of sodium carbonate solutions contain 2.6g of Na2Co3 . if 10ml of this solution is diluted to 500ml the concentration of diluted acid will be ?
Answer» 250ml of sodium carbonate solutions contain 2.6g of Na2Co3 . if 10ml of this solution is diluted to 500ml the concentration of diluted acid will be ?

Discussion

6122.	(a) Write the electroin arrangement in (i) a magnesium atom, and (ii) an oxygen atom. (b) How many electrons are there in the valence shell Of (i) a magnesium atom, and (ii) an oxygen atom? (c) show on a diagram the transfer of electrons between the atoms in the formation of MgO. (d) Name the solvent in which ionic compounds are generally soluble. (e) Why are aqueous solutions of ionic compounds able to conduct electricity?
Answer» (a) Write the electroin arrangement in (i) a magnesium atom, and (ii) an oxygen atom. (b) How many electrons are there in the valence shell Of (i) a magnesium atom, and (ii) an oxygen atom? (c) show on a diagram the transfer of electrons between the atoms in the formation of MgO. (d) Name the solvent in which ionic compounds are generally soluble. (e) Why are aqueous solutions of ionic compounds able to conduct electricity?

Discussion

6123.	what is stable isotope
Answer» what is stable isotope

Discussion

6124.	On heating 0.220g of a metallic oxide in presence of hydrogen, 0.045g of water is formed. If the equivalent of the metal is E, then what is the value of E/9?
Answer» On heating 0.220g of a metallic oxide in presence of hydrogen, 0.045g of water is formed. If the equivalent of the metal is E, then what is the value of E/9?

Discussion

6125.	The questions (i) to (v) refer to the following salt solutions listed A to F:A. Copper nitrateB. Iron (II) sulphateC. Iron (III) chlorideD. Lead nitrateE. Magnesium sulphateF. Zinc chloride(i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?(ii) Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?(iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it?(v) Which solution gives a white precipitate with excess ammonium hydroxide solution?
Answer» The questions (i) to (v) refer to the following salt solutions listed A to F: A. Copper nitrate B. Iron (II) sulphate C. Iron (III) chloride D. Lead nitrate E. Magnesium sulphate F. Zinc chloride (i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution? (ii) Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution? (iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it? (iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it? (v) Which solution gives a white precipitate with excess ammonium hydroxide solution?

Discussion

6126.	Which is the correct expression for integrated rate law of nth order reaction? A→Product(s)Here,a is initial concentration of the reactantx is concentration of reactant consumed at time ‘t’k is the rate constant
Answer» Which is the correct expression for integrated rate law of $n^{t h}$ order reaction? $A \to Product(s)$ Here, $a$ is initial concentration of the reactant $x$ is concentration of reactant consumed at time ‘t’ $k$ is the rate constant

Discussion

6127.	14. Why the chemical reactions of covalent compounds take place in slow motion?
Answer» 14. Why the chemical reactions of covalent compounds take place in slow motion?

Discussion

6128.	identify the following compounds are ions as acids /bases CL- NH4 +,HSO4-
Answer» identify the following compounds are ions as acids /bases CL- NH4 +,HSO4-

Discussion

6129.	Question 20.3Write the balanced chemical equation for the following reaction and identify the type of reaction.Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
Answer» Question 20.3 Write the balanced chemical equation for the following reaction and identify the type of reaction. Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.

Discussion

6130.	Pick out the incorrect statement
Answer» Pick out the incorrect statement

Discussion

6131.	Shape of NH3 is very similar to:
Answer» Shape of $N H_{3}$ is very similar to:

Discussion

6132.	in oxidation number balancing method the step involving the cross multiplication of electrons to balance the atoms on is multiplied in which side of the equation?
Answer» in oxidation number balancing method the step involving the cross multiplication of electrons to balance the atoms on is multiplied in which side of the equation?

Discussion

6133.	The incorrect statement regarding chloral hydrate (ccl3choh2o) is 1. It exhibits interamolecular hydrogen bonding 2. It has 9 lone pair and 9 bond pair 3. It is stable in spite of coexistence of two -oh groups on a carbon atom 4. Compound is non planer and polar
Answer» The incorrect statement regarding chloral hydrate (ccl3choh2o) is 1. It exhibits interamolecular hydrogen bonding 2. It has 9 lone pair and 9 bond pair 3. It is stable in spite of coexistence of two -oh groups on a carbon atom 4. Compound is non planer and polar

Discussion

6134.	The initial temperature of a two mole gas is T. If temperature increases to 3T then work done in the adiabatic process is 6RT.The gas is1)Monoatomic 2)Diatomic 3)Triatomic 4) polyatomic
Answer» The initial temperature of a two mole gas is T. If temperature increases to 3T then work done in the adiabatic process is 6RT.The gas is 1)Monoatomic 2)Diatomic 3)Triatomic 4) polyatomic

Discussion

6135.	Which of the following is incorrect:(IE = Ionisation Enthalpy)
Answer» Which of the following is incorrect: $(IE = Ionisation Enthalpy)$

Discussion

6136.	Which of the following salt is a weak electrolyte?
Answer» Which of the following salt is a weak electrolyte?

Discussion

6137.	2. SAYTZEF RULE Why that alkene is preferred which has more number of alkyl group around C=C
Answer» 2. SAYTZEF RULE Why that alkene is preferred which has more number of alkyl group around C=C

Discussion

6138.	(a) (i) Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated acid and potassium nitrate.(ii) Write a chemical equation to illustrate the acidic nature of nitric acid.(iii) Name the products formed when ammonium nitrate is heated.
Answer» (a) (i) Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated acid and potassium nitrate. (ii) Write a chemical equation to illustrate the acidic nature of nitric acid. (iii) Name the products formed when ammonium nitrate is heated.

Discussion

6139.	Aluminium items do not corrode easily when compared to objects made of iron because –
Answer» Aluminium items do not corrode easily when compared to objects made of iron because –

Discussion

6140.	20. Two reactions have different activation energy and have same rate at room temperature. Which statement correctly describes rate of these two reaction at same higher temperature. (a) the reaction with greater activation energy will be faster. (b) both have same rate. (c) reaction with lower activation energy will have higher rate
Answer» 20. Two reactions have different activation energy and have same rate at room temperature. Which statement correctly describes rate of these two reaction at same higher temperature. (a) the reaction with greater activation energy will be faster. (b) both have same rate. (c) reaction with lower activation energy will have higher rate

Discussion

6141.	How can you help in reducing the problem of waste disposal? Give any two methods.
Answer» How can you help in reducing the problem of waste disposal? Give any two methods.

Discussion

6142.	what is complete reactionof AsH3+HgCl2
Answer» what is complete reactionof AsH3+HgCl2

Discussion

6143.	Value of pH of a solution is 4. If indicates that concentration of hydrogen ions is
Answer» Value of pH of a solution is 4. If indicates that concentration of hydrogen ions is

Discussion

6144.	Which one of the following metals cannot evolve H2 from acids or H2O from its compounds.A. HgB. AlC. PbD. Fe
Answer» Which one of the following metals cannot evolve H2 from acids or H2O from its compounds. A. Hg B. Al C. Pb D. Fe

Discussion

6145.	What amount of Buckminster fullerene contains 60 carbon atoms?
Answer» What amount of Buckminster fullerene contains 60 carbon atoms?

Discussion

6146.	Fill inthe blanks:(a) Phosphorusis a very _________non-metal.(b) Metalsare ________ conductorsof heat and _________.(c) Ironis ________reactive than copper.(d) Metalsreact with acids to produce _________gas.
Answer» Fill in the blanks: (a) Phosphorus is a very _________ non-metal. (b) Metals are ________ conductors of heat and _________. (c) Iron is ________ reactive than copper. (d) Metals react with acids to produce _________ gas.

6146.

Fill inthe blanks:(a) Phosphorusis a very _____non-metal.(b) Metalsare conductorsof heat and _.(c) Ironis reactive than copper.(d) Metalsreact with acids to produce _____gas.

Answer»

Fill in
the blanks:

(a) Phosphorus
is a very _________
non-metal.

(b) Metals
are ________ conductors
of heat and _________.

(c) Iron
is ________
reactive than copper.

(d) Metals
react with acids to produce _________
gas.

Discussion

6147.	79 Copper crystalize in FCC lattice with unit cell length 361pm.what is the radius of copper atom in pm.
Answer» 79 Copper crystalize in FCC lattice with unit cell length 361pm.what is the radius of copper atom in pm.

Discussion

6148.	7. The rate constant K and K for two different reactions are 10^16.e^-2000/T and 10^15. e^-1000/T respectively. The temperature at which K =K is 1) 1000K /2.303 2) 1000K 3) 2000K /2.303 4) 2000K
Answer» 7. The rate constant K and K for two different reactions are 10^16.e^-2000/T and 10^15. e^-1000/T respectively. The temperature at which K =K is 1) 1000K /2.303 2) 1000K 3) 2000K /2.303 4) 2000K

Discussion

6149.	In Mendeleev’s periodic table, the vertical columns are called _i____________ and the horizontal rows are called ii_______.
Answer» In Mendeleev’s periodic table, the vertical columns are called _i____________ and the horizontal rows are called ii_______.

Discussion

6150.	Complete the given equation:___________ + HCl→NH4Cl
Answer» Complete the given equation: ___________ + $H C l \to N H_{4} C l$

Discussion

Explore topic-wise InterviewSolutions in .

An electron has magnetic quantum number is-3 ita principal quantum number is

A nucleas of mass no. 220 decays by alpha decay. The energy released in the reaction is 5 Mev. K.E. of alpha particle is

42. At infinite dilution how molarity is equal to solubility

The emf of a Daniel cell at 298K is E1:Zn/ZnSO4(0.01M)//CuSO4(1M)/Cu .When the concentration of ZnSO4 is 1M and that of CuSO4 is0.01M ,the emf changed to E2.What is the relationship between E1 and E2?Options:1)E1>E2. 2)E1

Which feature of ammonia leads to the formation of ammonium ion when dissolved in water?

94.HOW TO FIND GROUP NUMBER OF AN ELEMENT WHOSE LAST ELECTRON LIE IN THE d ORBITAL.WRITE THE FORMULA TO EXPLAIN.

What is pH?

3.42 g of sucrose are dissolved in 18 g of water in a beaker. The number of oxygen atoms in the solution are(a) 6.68×1023(b) 6.09×1022(c) 6.022×1023(d) 6.022×1021

A __ series of carbon compounds has a different number of carbon atoms but contain the same functional group.

Why wasn't hydrogen given a fixed position in Mendeleev’s Periodic Table? [1 MARK]

Write whether the following statement is true or false?‘Clusters of atoms that act as an ion are called monatomic ions.‘

If a given sample of pure iron gains 10% of its weight on partially rusting to form Fe2O3, what fraction of the iron would have been converted ? (Fe = 56)

What is the reaction between propene and Br.CCl3 in the presence of sunlight. Which radical so formed attacks first on propene and why. Give full explanation

Based on the structure of I2Cl6, find the number of atoms lying in one plane.[1 Mark]

16. How many atoms of carbon are present in a diamond weighing 0.5 carot ? (One carot weighs 200mg and assume the diamond to be pure carbon )

Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not.

18. Calculate the enthalpy of hydrogenation of C2H2(g) to C2H4(g). Given bond energies : C–H = 414.0 kJ/mol, C C = 827.6 kJ/mol, C=C = 606.0 kJ/mol, H–H = 430.5 kJ/mol.

What happens when carbon and its compounds are burnt in the presence of oxygen?

Specific conductance of decimolar solution of potassium chloride 18 ∘C is 1.12 S m−1. The resistance of a conductivity cell containing the solution at 18 ∘C was found to be 55 ohm. What is the value of the cell constant?

250ml of sodium carbonate solutions contain 2.6g of Na2Co3 . if 10ml of this solution is diluted to 500ml the concentration of diluted acid will be ?

what is stable isotope

On heating 0.220g of a metallic oxide in presence of hydrogen, 0.045g of water is formed. If the equivalent of the metal is E, then what is the value of E/9?

Which is the correct expression for integrated rate law of nth order reaction? A→Product(s)Here,a is initial concentration of the reactantx is concentration of reactant consumed at time ‘t’k is the rate constant

14. Why the chemical reactions of covalent compounds take place in slow motion?

identify the following compounds are ions as acids /bases CL- NH4 +,HSO4-

Question 20.3Write the balanced chemical equation for the following reaction and identify the type of reaction.Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.

Pick out the incorrect statement

Shape of NH3 is very similar to:

in oxidation number balancing method the step involving the cross multiplication of electrons to balance the atoms on is multiplied in which side of the equation?

The incorrect statement regarding chloral hydrate (ccl3choh2o) is 1. It exhibits interamolecular hydrogen bonding 2. It has 9 lone pair and 9 bond pair 3. It is stable in spite of coexistence of two -oh groups on a carbon atom 4. Compound is non planer and polar

The initial temperature of a two mole gas is T. If temperature increases to 3T then work done in the adiabatic process is 6RT.The gas is1)Monoatomic 2)Diatomic 3)Triatomic 4) polyatomic

Which of the following is incorrect:(IE = Ionisation Enthalpy)

Which of the following salt is a weak electrolyte?

2. SAYTZEF RULE Why that alkene is preferred which has more number of alkyl group around C=C

(a) (i) Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated acid and potassium nitrate.(ii) Write a chemical equation to illustrate the acidic nature of nitric acid.(iii) Name the products formed when ammonium nitrate is heated.

Aluminium items do not corrode easily when compared to objects made of iron because –

How can you help in reducing the problem of waste disposal? Give any two methods.

what is complete reactionof AsH3+HgCl2

Value of pH of a solution is 4. If indicates that concentration of hydrogen ions is

Which one of the following metals cannot evolve H2 from acids or H2O from its compounds.A. HgB. AlC. PbD. Fe

What amount of Buckminster fullerene contains 60 carbon atoms?

Fill inthe blanks:(a) Phosphorusis a very _________non-metal.(b) Metalsare ________ conductorsof heat and _________.(c) Ironis ________reactive than copper.(d) Metalsreact with acids to produce _________gas.

79 Copper crystalize in FCC lattice with unit cell length 361pm.what is the radius of copper atom in pm.

7. The rate constant K and K for two different reactions are 10^16.e^-2000/T and 10^15. e^-1000/T respectively. The temperature at which K =K is 1) 1000K /2.303 2) 1000K 3) 2000K /2.303 4) 2000K

In Mendeleev’s periodic table, the vertical columns are called _i____________ and the horizontal rows are called ii_______.

Complete the given equation:___________ + HCl→NH4Cl

Fill inthe blanks:(a) Phosphorusis a very _____non-metal.(b) Metalsare conductorsof heat and _.(c) Ironis reactive than copper.(d) Metalsreact with acids to produce _____gas.

In Mendeleev’s periodic table, the vertical columns are called _i______ and the horizontal rows are called ii_.