15280 + Interview Questions in Chemistry Page 131 InterviewSolution

6501.	Which of the following is an example of polar covalent compound?
Answer» Which of the following is an example of polar covalent compound?

Discussion

6502.	What is the dimensional formula for elasticity
Answer» What is the dimensional formula for elasticity

Discussion

6503.	the solid angle subtended by the periphery of an area 1 cm.cm at a point situated symmetrically at a distance of 5 cm from the area is
Answer» the solid angle subtended by the periphery of an area 1 cm.cm at a point situated symmetrically at a distance of 5 cm from the area is

Discussion

6504.	How is alumina obtained from bauxite?
Answer» How is alumina obtained from bauxite?

Discussion

6505.	What is the nature of oxides of carbon namely CO2 and CO?
Answer» What is the nature of oxides of carbon namely $C O_{2}$ and CO?

Discussion

6506.	The IUPAC name of the following compound CH3−CH3\|C\|CH3−CH3 is .
Answer» The IUPAC name of the following compound CH3−CH3\|C\|CH3−CH3 is .

Discussion

6507.	at 25 degree Celsius or 0.01 mole sample of a gas is compressed from 4.0 to 1.0 l at constant temperature what is the work done for this process if the external pressure is 4.0 bar?
Answer» at 25 degree Celsius or 0.01 mole sample of a gas is compressed from 4.0 to 1.0 l at constant temperature what is the work done for this process if the external pressure is 4.0 bar?

Discussion

6508.	Sulphuric acid can be prepared in the lab by dissolving ___ in water.
Answer» Sulphuric acid can be prepared in the lab by dissolving ___ in water.

Discussion

6509.	When iron (Fe) is exposed to the moist atmosphere for a long time, rust is formed which is a layer of a brown flaky substance. What is the chemical composition of this iron rust?
Answer» When iron (Fe) is exposed to the moist atmosphere for a long time, rust is formed which is a layer of a brown flaky substance. What is the chemical composition of this iron rust?

Discussion

6510.	Carbonate ores are reduced by the process of:
Answer» Carbonate ores are reduced by the process of:

Discussion

6511.	Find the formula of halide of a metal whose successive ionisation enthalpies are x ,2x,5x,100x kj respectively
Answer» Find the formula of halide of a metal whose successive ionisation enthalpies are x ,2x,5x,100x kj respectively

Discussion

6512.	Arrange the metals of question (1) in the decreasing order of reactivity.
Answer» Arrange the metals of question (1) in the decreasing order of reactivity.

Discussion

6513.	Which of the following gas is formed when cold 1% nitric acid reacts with magnesium at room temperature?
Answer» Which of the following gas is formed when cold 1% nitric acid reacts with magnesium at room temperature?

Discussion

6514.	The pH of ammonium phosphate solution, if pKa of phosphoric acid and pKb of ammonium hydroxide are 5.23 and 4.75 respectively, is
Answer» The $p H$ of ammonium phosphate solution, if $p K_{a}$ of phosphoric acid and $p K_{b}$ of ammonium hydroxide are 5.23 and 4.75 respectively, is

Discussion

6515.	A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound.
Answer» A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound.

Discussion

6516.	A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads. (a) What is element X? (b) Name the allotrope Y. (c) State whether allotrope Y is a good conductor or non-conductor of electricity. (d) Name one use of allotrope Y (other than lubrication and pencil leads) (e) Name two other allotropes of element X.
Answer» A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads. (a) What is element X? (b) Name the allotrope Y. (c) State whether allotrope Y is a good conductor or non-conductor of electricity. (d) Name one use of allotrope Y (other than lubrication and pencil leads) (e) Name two other allotropes of element X.

Discussion

6517.	Why are there rarely more than five links (or five organisms ) in a food chain?
Answer» Why are there rarely more than five links (or five organisms ) in a food chain?

Discussion

6518.	CFSE(△ ofor metal ion in d7 configuration in presence of strong ligand field is
Answer» CFSE(△ ofor metal ion in d7 configuration in presence of strong ligand field is

Discussion

6519.	ntVapour density of a volatile substance is 6 times of that of ethane. Its molecular mass will be?n
Answer» ntVapour density of a volatile substance is 6 times of that of ethane. Its molecular mass will be?n

Discussion

6520.	Question 2 What are the two properties of carbon which lead to the huge number of carbon compounds that we see around us?
Answer» Question 2 What are the two properties of carbon which lead to the huge number of carbon compounds that we see around us?

Discussion

6521.	Identify the liquid - in - gas type of mixture from the following.
Answer» Identify the liquid - in - gas type of mixture from the following.

Discussion

6522.	It is written that on dissolving NaCl in water, NaOH and HCl is produced. Is this true?
Answer» It is written that on dissolving NaCl in water, NaOH and HCl is produced. Is this true?

Discussion

6523.	If the cold junction of a thermocouple is kept at 0°C and the hot junction is kept at T°C then the relation between neutral temperature (Tn) and temperature of inversion (Ti) is
Answer» If the cold junction of a thermocouple is kept at 0°C and the hot junction is kept at T°C then the relation between neutral temperature (Tn) and temperature of inversion (Ti) is

Discussion

6524.	26. Mole vs molecular mass
Answer» 26. Mole vs molecular mass

Discussion

6525.	The reaction in which a single product is formed from two or more reactants is known as __.
Answer» The reaction in which a single product is formed from two or more reactants is known as __.

Discussion

6526.	A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that she will buy it?
Answer» A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that she will buy it?

Discussion

6527.	Observe the venn diagram given below.Which of the following process could 'X' be?
Answer» Observe the venn diagram given below. Which of the following process could 'X' be?

Discussion

6528.	Pick the odd member out from the list, giving reasons for your answer:ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide.
Answer» Pick the odd member out from the list, giving reasons for your answer: ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide.

Discussion

6529.	A mixture of formic acid and oxalic acid is heated with conc.H2SO4.The gas produced is collected and on its treatment with KOH solution, the volume of the gas decreased by 1/6 th. Calculate the molar ratio of the two acids in the original mixture.
Answer» A mixture of formic acid and oxalic acid is heated with conc.H2SO4.The gas produced is collected and on its treatment with KOH solution, the volume of the gas decreased by 1/6 th. Calculate the molar ratio of the two acids in the original mixture.

Discussion

6530.	Question 10 Which one of the following properties is not generally exhibited by ionic compounds?(a) Solubility in water.(b) Electrical conductivity in solid state.(c) High melting and boiling points.(d) Electrical conductivity in molten state.
Answer» Question 10 Which one of the following properties is not generally exhibited by ionic compounds? (a) Solubility in water. (b) Electrical conductivity in solid state. (c) High melting and boiling points. (d) Electrical conductivity in molten state.

Discussion

6531.	Which solution is used with the bauxite to obtain sodium meta aluminate during the conversion of bauxite into alumina?
Answer» Which solution is used with the bauxite to obtain sodium meta aluminate during the conversion of bauxite into alumina?

6531.

Which solution is used with the bauxite to obtain sodium meta aluminate during the conversion of bauxite into alumina?

Answer»

Which solution is used with the bauxite to obtain sodium meta aluminate during the conversion of bauxite into alumina?

Discussion

6532.	Balance Hydrogen sulphide + Oxygen = Water + Sulphur dioxide By shortcut method as given in the video lecture.
Answer» Balance Hydrogen sulphide + Oxygen = Water + Sulphur dioxide By shortcut method as given in the video lecture.

6532.

Balance Hydrogen sulphide + Oxygen = Water + Sulphur dioxide By shortcut method as given in the video lecture.

Answer»

Balance

Hydrogen sulphide + Oxygen = Water + Sulphur dioxide
By shortcut method as given in the video lecture.

Discussion

6533.	Explain hybridisation and geometry as well as magnetic nature of [Mn(CN)6]^3- and [Mn(Cl)6]^3-.
Answer» Explain hybridisation and geometry as well as magnetic nature of [Mn(CN)6]^3- and [Mn(Cl)6]^3-.

Discussion

6534.	Question 6 Explain circumstances leading to acid rain. How does acid rain affect us?
Answer» Question 6 Explain circumstances leading to acid rain. How does acid rain affect us?

Discussion

6535.	What common feature is there is in sugar, paper, plastic, wood, cereals, pulses and petrol?
Answer» What common feature is there is in sugar, paper, plastic, wood, cereals, pulses and petrol?

6535.

What common feature is there is in sugar, paper, plastic, wood, cereals, pulses and petrol?

Answer»

What common feature is there is in sugar, paper, plastic, wood, cereals, pulses and petrol?

Discussion

6536.	Question 24 Identify the oxidising agent (oxidant) in the following reactions: (a) Pb3O4+8HCl→3PbCl2+Cl2+4H2O (b) 2Mg+O2→2MgO (c) CuSO4+Zn→Cu+ZnSO4 (d) V2O5+5Ca→2V+5CaO (e) 3Fe+4H2O→Fe3O4+4H2 (f) CuO+H2→Cu+H2O
Answer» Question 24 Identify the oxidising agent (oxidant) in the following reactions: (a) ${Pb}_{3} O_{4} + 8 HCl \to 3 {PbCl}_{2} + {Cl}_{2} + 4 H_{2} O$ (b) $2 Mg + O_{2} \to 2 MgO$ (c) ${CuSO}_{4} + Zn \to Cu + {ZnSO}_{4}$ (d) $V_{2} O_{5} + 5 Ca \to 2 V + 5 CaO$ (e) $3 Fe + 4 H_{2} O \to {Fe}_{3} O_{4} + 4 H_{2}$ (f) $CuO + H_{2} \to Cu + H_{2} O$

Discussion

6537.	52. how many isomers of dimethyl cyclobutane are possible
Answer» 52. how many isomers of dimethyl cyclobutane are possible

Discussion

6538.	24. a metallic sphere weighing 3Kg in air is held by a string so as to bbe completely immersed in a liquid of relative density 0.8. the relative density of metallic sphere is 10. what is the tension in the string?
Answer» 24. a metallic sphere weighing 3Kg in air is held by a string so as to bbe completely immersed in a liquid of relative density 0.8. the relative density of metallic sphere is 10. what is the tension in the string?

Discussion

6539.	Which of the following atoms will have the smallest size?
Answer» Which of the following atoms will have the smallest size?

Discussion

6540.	Q 2 mole of N2 is mixed with 6 moles of H2 in a closed vessel of 1 litre capacity. If 50% N2 is convertedinto NH3 at equilibrium, the value of Kc for the reactionisN2(g) +3H2(g) gives2NH3(g)
Answer» Q 2 mole of N2 is mixed with 6 moles of H2 in a closed vessel of 1 litre capacity. If 50% N2 is convertedinto NH3 at equilibrium, the value of Kc for the reactionisN2(g) +3H2(g) gives2NH3(g)

Discussion

6541.	On a ship sailing in the Pacific ocean, where the temperature is 27∘C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches the Indian ocean where the temperature is 29∘C ?
Answer» On a ship sailing in the Pacific ocean, where the temperature is 27 $^{\circ}$ C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches the Indian ocean where the temperature is 29 $^{\circ}$ C ?

Discussion

6542.	A neutral organic compound X of molecular formula C2H6O on oxidation with acidified potassium dichromate gives an acidic compound Y. Compound X reacts with Y on warming in the presence of conc. H2SO4 to give a sweet-smelling substance Z. What are X, Y and Z?
Answer» A neutral organic compound X of molecular formula $C_{2} H_{6} O$ on oxidation with acidified potassium dichromate gives an acidic compound Y. Compound X reacts with Y on warming in the presence of conc. $H_{2} S O_{4}$ to give a sweet-smelling substance Z. What are X, Y and Z?

Discussion

6543.

Complete the table Property of metal Use in every day life i. Ductility ii. Malleability iii. Conduction of heat iv. Conduction of electricity v. Sonority

Answer» Complete the table

Property of metal	Use in every day life
i. Ductility
ii. Malleability
iii. Conduction of heat
iv. Conduction of electricity
v. Sonority

Discussion

6544.	What is a redox reaction ? When a magnesium ribbon burns in air with a dazzling flame and forms a white ash, is magnesium oxidised or reduced ?
Answer» What is a redox reaction ? When a magnesium ribbon burns in air with a dazzling flame and forms a white ash, is magnesium oxidised or reduced ?

Discussion

6545.	Identify the major product X obtained in the following reaction.2,3-dimethylbutan-2-olConc. H2SO4−−−−−−−−→X
Answer» Identify the major product X obtained in the following reaction. $2,3-dimethylbutan-2-ol Conc. H_{2} S O_{4} - ------- \to X$

Discussion

6546.	(b) (i) Metals are generally solid at room temperature. Name the metal which is liquid at roomtemperature (say 25° C).(ii) Which element is the most reactive element of Group 1(IA) elements?
Answer» (b) (i) Metals are generally solid at room temperature. Name the metal which is liquid at room temperature (say 25° C). (ii) Which element is the most reactive element of Group 1(IA) elements?

Discussion

6547.	______ is produced from alcohol obtained through fermentation of substanceLiquor
Answer» ______ is produced from alcohol obtained through fermentation of substance Liquor

6547.

______ is produced from alcohol obtained through fermentation of substanceLiquor

Answer»

______ is produced from alcohol obtained through fermentation of substance

Liquor

Discussion

6548.	The Eo(m2+/m) value for Cu is positive. Does we can also say that it is because Cu is more stable in its ground i.e. (M) state and thats why it is easier for it to get reduced. Apart from other solutions of this ques like enthalpy of atomisation e.t.c
Answer» The Eo(m2+/m) value for Cu is positive. Does we can also say that it is because Cu is more stable in its ground i.e. (M) state and thats why it is easier for it to get reduced. Apart from other solutions of this ques like enthalpy of atomisation e.t.c

Discussion

6549.	Metals differ in their reactivity with acids. Justify the statement giving examples. [3 MARKS]
Answer» Metals differ in their reactivity with acids. Justify the statement giving examples. [3 MARKS]

Discussion

6550.	Heat of neutrlisation of strong polybasic acid by strong base is-41.1 kcal/mol.what is baticity of acid ip its in enthalpy of ionisation is zero(A)1(B)2 (C)3 (D)
Answer» Heat of neutrlisation of strong polybasic acid by strong base is-41.1 kcal/mol.what is baticity of acid ip its in enthalpy of ionisation is zero(A)1(B)2 (C)3 (D)

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is an example of polar covalent compound?

What is the dimensional formula for elasticity

the solid angle subtended by the periphery of an area 1 cm.cm at a point situated symmetrically at a distance of 5 cm from the area is

How is alumina obtained from bauxite?

What is the nature of oxides of carbon namely CO2 and CO?

The IUPAC name of the following compound CH3−CH3|C|CH3−CH3 is .

at 25 degree Celsius or 0.01 mole sample of a gas is compressed from 4.0 to 1.0 l at constant temperature what is the work done for this process if the external pressure is 4.0 bar?

Sulphuric acid can be prepared in the lab by dissolving ___ in water.

When iron (Fe) is exposed to the moist atmosphere for a long time, rust is formed which is a layer of a brown flaky substance. What is the chemical composition of this iron rust?

Carbonate ores are reduced by the process of:

Find the formula of halide of a metal whose successive ionisation enthalpies are x ,2x,5x,100x kj respectively

Arrange the metals of question (1) in the decreasing order of reactivity.

Which of the following gas is formed when cold 1% nitric acid reacts with magnesium at room temperature?

The pH of ammonium phosphate solution, if pKa of phosphoric acid and pKb of ammonium hydroxide are 5.23 and 4.75 respectively, is

A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound.

Why are there rarely more than five links (or five organisms ) in a food chain?

CFSE(△ ofor metal ion in d7 configuration in presence of strong ligand field is

ntVapour density of a volatile substance is 6 times of that of ethane. Its molecular mass will be?n

Question 2 What are the two properties of carbon which lead to the huge number of carbon compounds that we see around us?

Identify the liquid - in - gas type of mixture from the following.

It is written that on dissolving NaCl in water, NaOH and HCl is produced. Is this true?

If the cold junction of a thermocouple is kept at 0°C and the hot junction is kept at T°C then the relation between neutral temperature (Tn) and temperature of inversion (Ti) is

26. Mole vs molecular mass

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

A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that she will buy it?

Observe the venn diagram given below.Which of the following process could 'X' be?

Pick the odd member out from the list, giving reasons for your answer:ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide.

A mixture of formic acid and oxalic acid is heated with conc.H2SO4.The gas produced is collected and on its treatment with KOH solution, the volume of the gas decreased by 1/6 th. Calculate the molar ratio of the two acids in the original mixture.

Question 10 Which one of the following properties is not generally exhibited by ionic compounds?(a) Solubility in water.(b) Electrical conductivity in solid state.(c) High melting and boiling points.(d) Electrical conductivity in molten state.

Which solution is used with the bauxite to obtain sodium meta aluminate during the conversion of bauxite into alumina?

Balance Hydrogen sulphide + Oxygen = Water + Sulphur dioxide By shortcut method as given in the video lecture.

Explain hybridisation and geometry as well as magnetic nature of [Mn(CN)6]^3- and [Mn(Cl)6]^3-.

Question 6 Explain circumstances leading to acid rain. How does acid rain affect us?

What common feature is there is in sugar, paper, plastic, wood, cereals, pulses and petrol?

Question 24 Identify the oxidising agent (oxidant) in the following reactions: (a) Pb3O4+8HCl→3PbCl2+Cl2+4H2O (b) 2Mg+O2→2MgO (c) CuSO4+Zn→Cu+ZnSO4 (d) V2O5+5Ca→2V+5CaO (e) 3Fe+4H2O→Fe3O4+4H2 (f) CuO+H2→Cu+H2O

52. how many isomers of dimethyl cyclobutane are possible

24. a metallic sphere weighing 3Kg in air is held by a string so as to bbe completely immersed in a liquid of relative density 0.8. the relative density of metallic sphere is 10. what is the tension in the string?

Which of the following atoms will have the smallest size?

Q 2 mole of N2 is mixed with 6 moles of H2 in a closed vessel of 1 litre capacity. If 50% N2 is convertedinto NH3 at equilibrium, the value of Kc for the reactionisN2(g) +3H2(g) gives2NH3(g)

On a ship sailing in the Pacific ocean, where the temperature is 27∘C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches the Indian ocean where the temperature is 29∘C ?

A neutral organic compound X of molecular formula C2H6O on oxidation with acidified potassium dichromate gives an acidic compound Y. Compound X reacts with Y on warming in the presence of conc. H2SO4 to give a sweet-smelling substance Z. What are X, Y and Z?

Complete the table Property of metal Use in every day life i. Ductility ii. Malleability iii. Conduction of heat iv. Conduction of electricity v. Sonority

What is a redox reaction ? When a magnesium ribbon burns in air with a dazzling flame and forms a white ash, is magnesium oxidised or reduced ?

Identify the major product X obtained in the following reaction.2,3-dimethylbutan-2-olConc. H2SO4−−−−−−−−→X

(b) (i) Metals are generally solid at room temperature. Name the metal which is liquid at roomtemperature (say 25° C).(ii) Which element is the most reactive element of Group 1(IA) elements?

______ is produced from alcohol obtained through fermentation of substanceLiquor

The Eo(m2+/m) value for Cu is positive. Does we can also say that it is because Cu is more stable in its ground i.e. (M) state and thats why it is easier for it to get reduced. Apart from other solutions of this ques like enthalpy of atomisation e.t.c

Metals differ in their reactivity with acids. Justify the statement giving examples. [3 MARKS]

Heat of neutrlisation of strong polybasic acid by strong base is-41.1 kcal/mol.what is baticity of acid ip its in enthalpy of ionisation is zero(A)1(B)2 (C)3 (D)