15280 + Interview Questions in Chemistry Page 114 InterviewSolution

5651.	what happen when pottasium iodide react with lead nitrate
Answer» what happen when pottasium iodide react with lead nitrate

Discussion

5652.	3Fe + 2O2 ---------- Fe3O4 How does this reaction occur, because on cris-crossing the valencies of Fe and O we don't get Fe3O4?
Answer» 3Fe + 2O₂ ---------- Fe₃O₄ How does this reaction occur, because on cris-crossing the valencies of Fe and O we don't get Fe₃O₄?

Discussion

5653.	Can every compound be decomposed ??
Answer» Can every compound be decomposed ??

Discussion

5654.	What happens when iron is dipped in conc. HNO3?
Answer» What happens when iron is dipped in conc. $H N O_{3}$ ?

Discussion

5655.	When metal burns and reacts to oxygen, is it endothermic or exothermic?why?
Answer» When metal burns and reacts to oxygen, is it endothermic or exothermic?why?

Discussion

5656.	Which of the following equipments are required in contact process?
Answer» Which of the following equipments are required in contact process?

Discussion

5657.	(e) Give reasons why:(i) Hot water has no action on aluminium.(ii) Concentrated nitric acid makes iron passive.(iii) Cryolite and fluorspar are added to alumina, in the metallurgy of aluminium.(iv) Metals are good reducing agents.(v) Carbon tetrachloride does not dissolve in water.
Answer» (e) Give reasons why: (i) Hot water has no action on aluminium. (ii) Concentrated nitric acid makes iron passive. (iii) Cryolite and fluorspar are added to alumina, in the metallurgy of aluminium. (iv) Metals are good reducing agents. (v) Carbon tetrachloride does not dissolve in water.

Discussion

5658.	What is the hybrodisation of oxygen in OH group in para-dihydroxy benzene? Shouldn't it be sp3 (2 lone paris+ 2 bond pairs)?
Answer» What is the hybrodisation of oxygen in OH group in para-dihydroxy benzene? Shouldn't it be sp3 (2 lone paris+ 2 bond pairs)?

Discussion

5659.	Question 41(c)Compound X and aluminium are used to join railway tracks. Write down its reaction.
Answer» Question 41(c) Compound X and aluminium are used to join railway tracks. Write down its reaction.

Discussion

5660.	Which of the following will yield N2 when heated?
Answer» Which of the following will yield $N_{2}$ when heated?

Discussion

5661.	Bohr model of an atom could not account for:
Answer» Bohr model of an atom could not account for:

Discussion

5662.	how to find electronic configuration
Answer» how to find electronic configuration

Discussion

5663.	A hydrocarbon of molecular formula c6h14 on monochlorination gives two products . Identify the structure of hydrocarbon
Answer» A hydrocarbon of molecular formula c6h14 on monochlorination gives two products . Identify the structure of hydrocarbon

Discussion

5664.	Which of the following is a non-conductor in solid state but good conductor in molten state?
Answer» Which of the following is a non-conductor in solid state but good conductor in molten state?

Discussion

5665.	If a crop of wheat removes 20 kg of nitrogen per hectare of soil, what mass of the fertilizer calcium nitrate, Ca(NO3)2 would be required to replace nitrogen in 10 hectare field? (N = 14, O = 16, Ca = 40).
Answer» If a crop of wheat removes 20 kg of nitrogen per hectare of soil, what mass of the fertilizer calcium nitrate, Ca(NO₃)₂ would be required to replace nitrogen in 10 hectare field? (N = 14, O = 16, Ca = 40).

Discussion

5666.	135 Out of following in which pair, electron affinity of 1element is greater than electron affinity of 2nd?(2) N, O-(3) SiC(4) О, S
Answer» 135 Out of following in which pair, electron affinity of 1element is greater than electron affinity of 2nd?(2) N, O-(3) SiC(4) О, S

Discussion

5667.	How can we identify strong acid and strong base?
Answer» How can we identify strong acid and strong base?

Discussion

5668.	Question 3.2Write a balanced chemical equation and state symbols for the reaction:Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.
Answer» Question 3.2 Write a balanced chemical equation and state symbols for the reaction: Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.

Discussion

5669.	(a) What is the special feature of the structure of: i) C2H4 ii) C2H2 (b) What type of reaction is common to both these compounds? Why does methane not undergo this type of reaction? [4 MARKS]
Answer» (a) What is the special feature of the structure of: i) $C_{2} H_{4}$ ii) $C_{2} H_{2}$ (b) What type of reaction is common to both these compounds? Why does methane not undergo this type of reaction? [4 MARKS]

Discussion

5670.	For the 1st order reaction, A(g)→2B(g)+C(s), t1/2=24min. The reaction is carried out by taking a certain mass of 'A' enclosed in a vessel in which it exerts a pressure of 400 mm Hg. The pressure of the reaction mixture after the expiry of 48 min will be :Take Antilog (0.6)=4
Answer» For the $1^{s t}$ order reaction, $A (g) \to 2 B (g) + C (s), t_{1 / 2} = 24 min .$ The reaction is carried out by taking a certain mass of 'A' enclosed in a vessel in which it exerts a pressure of $400 m m H g .$ The pressure of the reaction mixture after the expiry of $48 m i n$ will be : Take $Antilog (0.6) = 4$

Discussion

5671.	Fill in the blanks:(i) Organic compounds are essentially __________ compounds. They show _________ reaction and their rates are ___________.(ii) One of the products of combustion of organic compounds is always ___________.(iii) More than 90% of the known organic compounds are __________.(iv) Vital force theory was discarded by the synthesis of ___________ in laboratory.
Answer» Fill in the blanks: (i) Organic compounds are essentially __________ compounds. They show _________ reaction and their rates are ___________. (ii) One of the products of combustion of organic compounds is always ___________. (iii) More than 90% of the known organic compounds are __________. (iv) Vital force theory was discarded by the synthesis of ___________ in laboratory.

Discussion

5672.	Complete the following sentence, choosing the correct word from the brackets."Concentrated sulphuric acid is used in the laboratory preparation of nitric acid and hydrochloric acid because it is ................ (less volatile/stronger) in comparison to these two acids."
Answer» Complete the following sentence, choosing the correct word from the brackets. "Concentrated sulphuric acid is used in the laboratory preparation of nitric acid and hydrochloric acid because it is ................ (less volatile/stronger) in comparison to these two acids."

Discussion

5673.	(a) Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3. State the reason.(b) How can 68% nitric acid be concentrated to 98% nitric acid?
Answer» (a) Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO₃. State the reason. (b) How can 68% nitric acid be concentrated to 98% nitric acid?

Discussion

5674.	Why is ozone layer getting depleted at higher levels of the atmosphere?
Answer» Why is ozone layer getting depleted at higher levels of the atmosphere?

Discussion

5675.	What is the chain isomer of n butane?
Answer» What is the chain isomer of n butane?

5675.

What is the chain isomer of n butane?

Answer»

What is the chain isomer of n butane?

Discussion

5676.	Mention the reaction conditions and give balanced equations to obtain(i) Cl2 gas from HCl gas.(ii) Cl2 gas from HCl acid.(iii) HCl gas from common salt.
Answer» Mention the reaction conditions and give balanced equations to obtain (i) Cl₂gas from HCl gas. (ii) Cl₂ gas from HCl acid. (iii) HCl gas from common salt.

Discussion

5677.	Which reaction(s) can produce ′M′ as one of the products?
Answer» Which reaction(s) can produce $^{'} M^{'}$ as one of the products?

Discussion

5678.	What is the reaction which takes place between the ozone and the chlorine molecules
Answer» What is the reaction which takes place between the ozone and the chlorine molecules

Discussion

5679.	Question 29On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.(a) Is this a physical or a chemical change?(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
Answer» Question 29 On heating calcium carbonate gets converted into calcium oxide and carbon dioxide. (a) Is this a physical or a chemical change? (b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.

Discussion

5680.	Explain hydronium ion. Write the ionisation of sulphuric acid showing the formation of hydronium ion.
Answer» Explain hydronium ion. Write the ionisation of sulphuric acid showing the formation of hydronium ion.

Discussion

5681.	The number of functional isomer(s) of CH3COCH3 is/are?
Answer» The number of functional isomer(s) of $C H_{3} C O C H_{3}$ is/are?

Discussion

5682.	Question 44You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute HCl, dilute HNO3,ZnCl2(aq) and H2O. In which of the above containers these solutions can be kept?
Answer» Question 44 You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute $HCl$ , dilute ${HNO}_{3}, {ZnCl}_{2} (aq)$ and $H_{2} O$ . In which of the above containers these solutions can be kept?

Discussion

5683.	What is covalent bonding? explain with example.
Answer» What is covalent bonding? explain with example.

Discussion

5684.	What is the action of nitric acid on litmus paper?
Answer» What is the action of nitric acid on litmus paper?

Discussion

5685.	What is the meaning of Cu/Zn couple?
Answer» What is the meaning of Cu/Zn couple?

Discussion

5686.	HCl acid is
Answer» $H C l$ acid is

Discussion

5687.	A food web is formed by:
Answer» A food web is formed by:

Discussion

5688.	Give examples for the following:(a) Ionic chlorides of two different divalent metals.(b) Two solid covalent compounds.(c) Two liquid non-polar compounds.(d) Two gaseous polar compounds.(e) Two gaseous non-polar compounds.
Answer» Give examples for the following: (a) Ionic chlorides of two different divalent metals. (b) Two solid covalent compounds. (c) Two liquid non-polar compounds. (d) Two gaseous polar compounds. (e) Two gaseous non-polar compounds.

Discussion

5689.	Why low spin complexes are stable than high spin complexes in d4 to d7 orbital.
Answer» Why low spin complexes are stable than high spin complexes in d4 to d7 orbital.

Discussion

5690.	Find A, B and C in the following reactions NH3+A+CO2→(NH4)CO3(NH4)2CO3+B→CaCO3↓+2NH4ClNH4HCO3+NaCl→NH4Cl+C
Answer» Find A, B and C in the following reactions $N H_{3} + A + C O_{2} \to (N H_{4}) C O_{3}$ $(N H_{4})_{2} C O_{3} + B \to C a C O_{3} ↓ + 2 N H_{4} C l$ $N H_{4} H C O_{3} + N a C l \to N H_{4} C l + C$

Discussion

5691.	ntWhat will be the total number of electrons,shared electrons ,valence electons and unshared electrons in HNO3 molecule.how will we make its lewis representation using this informationn
Answer» ntWhat will be the total number of electrons,shared electrons ,valence electons and unshared electrons in HNO3 molecule.how will we make its lewis representation using this informationn

Discussion

5692.	How many Chlorine atoms are required by carbon atom to complete its octet configuration?
Answer» How many Chlorine atoms are required by carbon atom to complete its octet configuration?

Discussion

5693.	Burst the bubbles that contain an Arrhenius acid.
Answer» Burst the bubbles that contain an Arrhenius acid.

Discussion

5694.	Which of the following has maximum number of moles?
Answer» Which of the following has maximum number of moles?

Discussion

5695.	while naming a compound using nomenclature, which of the following gets the lowest number? Unsaturated carbon ( yne, or ene carbon ) or functional group (such as carboxylic acid ) ? Please Illustrate with example.
Answer» while naming a compound using nomenclature, which of the following gets the lowest number? Unsaturated carbon ( yne, or ene carbon ) or functional group (such as carboxylic acid ) ? Please Illustrate with example.

Discussion

5696.	IN BORON FAMILY,WHY +3 OXIDATION STATE IS HIGHLY OXIDISING IN CHARACTER AND WHY+1 OXIDATION STATES ARE MORE IONIC THAN +3 OXDATION STATES
Answer» IN BORON FAMILY,WHY +3 OXIDATION STATE IS HIGHLY OXIDISING IN CHARACTER AND WHY+1 OXIDATION STATES ARE MORE IONIC THAN +3 OXDATION STATES

Discussion

5697.	How to identify that which molecule will be more ionic?? Explain briefly.
Answer» How to identify that which molecule will be more ionic?? Explain briefly.

Discussion

5698.	Is CO a neutral oxide?
Answer» Is CO a neutral oxide?

Discussion

5699.	Décrivez votre chien.
Answer» Décrivez votre chien.

Discussion

5700.	Which has the highest bond energy
Answer» Which has the highest bond energy

Discussion

Explore topic-wise InterviewSolutions in .

what happen when pottasium iodide react with lead nitrate

3Fe + 2O2 ---------- Fe3O4 How does this reaction occur, because on cris-crossing the valencies of Fe and O we don't get Fe3O4? ​​​

Can every compound be decomposed ??

What happens when iron is dipped in conc. HNO3?

When metal burns and reacts to oxygen, is it endothermic or exothermic?why?

Which of the following equipments are required in contact process?

(e) Give reasons why:(i) Hot water has no action on aluminium.(ii) Concentrated nitric acid makes iron passive.(iii) Cryolite and fluorspar are added to alumina, in the metallurgy of aluminium.(iv) Metals are good reducing agents.(v) Carbon tetrachloride does not dissolve in water.

What is the hybrodisation of oxygen in OH group in para-dihydroxy benzene? Shouldn't it be sp3 (2 lone paris+ 2 bond pairs)?

Question 41(c)Compound X and aluminium are used to join railway tracks. Write down its reaction.

Which of the following will yield N2 when heated?

Bohr model of an atom could not account for:

how to find electronic configuration

A hydrocarbon of molecular formula c6h14 on monochlorination gives two products . Identify the structure of hydrocarbon

Which of the following is a non-conductor in solid state but good conductor in molten state?

If a crop of wheat removes 20 kg of nitrogen per hectare of soil, what mass of the fertilizer calcium nitrate, Ca(NO3)2 would be required to replace nitrogen in 10 hectare field? (N = 14, O = 16, Ca = 40).

135 Out of following in which pair, electron affinity of 1element is greater than electron affinity of 2nd?(2) N, O-(3) SiC(4) О, S

How can we identify strong acid and strong base?

Question 3.2Write a balanced chemical equation and state symbols for the reaction:Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.

(a) What is the special feature of the structure of: i) C2H4 ii) C2H2 (b) What type of reaction is common to both these compounds? Why does methane not undergo this type of reaction? [4 MARKS]

For the 1st order reaction, A(g)→2B(g)+C(s), t1/2=24min. The reaction is carried out by taking a certain mass of 'A' enclosed in a vessel in which it exerts a pressure of 400 mm Hg. The pressure of the reaction mixture after the expiry of 48 min will be :Take Antilog (0.6)=4

Complete the following sentence, choosing the correct word from the brackets."Concentrated sulphuric acid is used in the laboratory preparation of nitric acid and hydrochloric acid because it is ................ (less volatile/stronger) in comparison to these two acids."

(a) Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3. State the reason.(b) How can 68% nitric acid be concentrated to 98% nitric acid?

Why is ozone layer getting depleted at higher levels of the atmosphere?

What is the chain isomer of n butane?

Mention the reaction conditions and give balanced equations to obtain(i) Cl2 gas from HCl gas.(ii) Cl2 gas from HCl acid.(iii) HCl gas from common salt.

Which reaction(s) can produce ′M′ as one of the products?

What is the reaction which takes place between the ozone and the chlorine molecules

Question 29On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.(a) Is this a physical or a chemical change?(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.

Explain hydronium ion. Write the ionisation of sulphuric acid showing the formation of hydronium ion.

The number of functional isomer(s) of CH3COCH3 is/are?

Question 44You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute HCl, dilute HNO3,ZnCl2(aq) and H2O. In which of the above containers these solutions can be kept?

What is covalent bonding? explain with example.

What is the action of nitric acid on litmus paper?

What is the meaning of Cu/Zn couple?

HCl acid is

A food web is formed by:

Give examples for the following:(a) Ionic chlorides of two different divalent metals.(b) Two solid covalent compounds.(c) Two liquid non-polar compounds.(d) Two gaseous polar compounds.(e) Two gaseous non-polar compounds.

Why low spin complexes are stable than high spin complexes in d4 to d7 orbital.

Find A, B and C in the following reactions NH3+A+CO2→(NH4)CO3(NH4)2CO3+B→CaCO3↓+2NH4ClNH4HCO3+NaCl→NH4Cl+C

ntWhat will be the total number of electrons,shared electrons ,valence electons and unshared electrons in HNO3 molecule.how will we make its lewis representation using this informationn

How many Chlorine atoms are required by carbon atom to complete its octet configuration?

Burst the bubbles that contain an Arrhenius acid.

Which of the following has maximum number of moles?

while naming a compound using nomenclature, which of the following gets the lowest number? Unsaturated carbon ( yne, or ene carbon ) or functional group (such as carboxylic acid ) ? Please Illustrate with example.

IN BORON FAMILY,WHY +3 OXIDATION STATE IS HIGHLY OXIDISING IN CHARACTER AND WHY+1 OXIDATION STATES ARE MORE IONIC THAN +3 OXDATION STATES

How to identify that which molecule will be more ionic?? Explain briefly.

Is CO a neutral oxide?

Décrivez votre chien.

Which has the highest bond energy

3Fe + 2O2 ---------- Fe3O4 How does this reaction occur, because on cris-crossing the valencies of Fe and O we don't get Fe3O4?