7248 + Interview Questions in Chemistry Page 49 InterviewSolution

2401.	0.2 gram of a gas X occupies a volume of 440 ml. If 0.1 gram of carbon dioxide occupies a volume off 320 ml at the same temperature and pressure then gas X would be
Answer» 0.2 gram of a gas X occupies a volume of 440 ml. If 0.1 gram of carbon dioxide occupies a volume off 320 ml at the same temperature and pressure then gas X would be

Discussion

2402.	Arrange flurobenzene,chlorobenzene,bromobenzene,iodobenzene in order of their relative reactivity for electrophilic substitution reaction
Answer» Arrange flurobenzene,chlorobenzene,bromobenzene,iodobenzene in order of their relative reactivity for electrophilic substitution reaction

Discussion

2403.	Explain why saucepan handles are made of thermosetting plastics.
Answer» Explain why saucepan handles are made of thermosetting plastics.

Discussion

2404.	25 Equilibrium concentration of PCl5 , PCl3 & Cl2 are 4M ,2M &2M resp. PCl5 --- PCl3 + Cl2. If volume of container is doubled then at new equilibrium, concentration of reactant & product will be
Answer» 25 Equilibrium concentration of PCl5 , PCl3 & Cl2 are 4M ,2M &2M resp. PCl5 --- PCl3 + Cl2. If volume of container is doubled then at new equilibrium, concentration of reactant & product will be

Discussion

2405.	Why are fires produced by burning oil not extinguished by pouring water ?
Answer» Why are fires produced by burning oil not extinguished by pouring water ?

Discussion

2406.	Shorea robusta is the botanical name of
Answer» Shorea robusta is the botanical name of

Discussion

2407.	Express the melting point of ice on the Celsius scale and the Fahrenheit scale.
Answer» Express the melting point of ice on the Celsius scale and the Fahrenheit scale.

Discussion

2408.	Why is evaporation faster in the case of a china dish than a test tube?
Answer» Why is evaporation faster in the case of a china dish than a test tube?

Discussion

2409.	Equal masses of O2 and CH4 have been taken in same container of volume V at 25°C. The ratio of volume of gases effuses out initially from vessel is
Answer» Equal masses of O2 and CH4 have been taken in same container of volume V at 25°C. The ratio of volume of gases effuses out initially from vessel is

Discussion

2410.	Samples were taken from different parts of a mixture and tested. They were found to have exactly the same properties. What kind of mixture is it?
Answer» Samples were taken from different parts of a mixture and tested. They were found to have exactly the same properties. What kind of mixture is it?

Discussion

2411.	How does pouring water extinguish a fire ?
Answer» How does pouring water extinguish a fire ?

Discussion

2412.	The reactant ′A′ could be:
Answer» The reactant $^{'} A^{'}$ could be:

Discussion

2413.	What is stable atomic configuration and valency? Relate them?
Answer» What is stable atomic configuration and valency? Relate them?

Discussion

2414.	Can you burn a piece of wood by bringing a lighted matchstick near it ? Explain.
Answer» Can you burn a piece of wood by bringing a lighted matchstick near it ? Explain.

Discussion

2415.	what is the amount of sulphuric acid(in grams), required to react completely with 100 litres of ammonia at NTP
Answer» what is the amount of sulphuric acid(in grams), required to react completely with 100 litres of ammonia at NTP

Discussion

2416.	Zinc is more reactive than iron then how is it possible that a layer of zinc can protect bridges from rusting
Answer» Zinc is more reactive than iron then how is it possible that a layer of zinc can protect bridges from rusting

Discussion

2417.	43. The correct order of increasing solubility of AgCl in(A) Water(B) 0.1 М NaCl(C) 0.1 М ВаСl,(D) 0.1 M NH3is(1) A< B< C D(2) B < C
Answer» 43. The correct order of increasing solubility of AgCl in(A) Water(B) 0.1 М NaCl(C) 0.1 М ВаСl,(D) 0.1 M NH3is(1) A< B< C D(2) B < C

Discussion

2418.	What is matter, and give some examples?
Answer» What is matter, and give some examples?

Discussion

2419.	Which of the following is/are not the property of hydrogen?
Answer» Which of the following is/are not the property of hydrogen?

Discussion

2420.	Write any two physical properties of metals.
Answer» Write any two physical properties of metals.

Discussion

2421.	30.The temperature of 20 L of Nitrogen was increased from 100K to 300K at a constant pressure. the change in volume will be
Answer» 30.The temperature of 20 L of Nitrogen was increased from 100K to 300K at a constant pressure. the change in volume will be

Discussion

2422.	State whether a sample of each of the following would increase or decrease in mass if exposed to air. (a) Solid NaOH, (b) Solid CaCl2, (c) Solid Na2CO3.10H2O, (d) Conc. Sulphuric acid, (e) Iron (III) Chloride
Answer» State whether a sample of each of the following would increase or decrease in mass if exposed to air. (a) Solid NaOH, (b) Solid $C a C l_{2}$ , (c) Solid $N a_{2} C O_{3} .10 H_{2} O,$ (d) Conc. Sulphuric acid, (e) Iron (III) Chloride

2422.

State whether a sample of each of the following would increase or decrease in mass if exposed to air. (a) Solid NaOH, (b) Solid CaCl2, (c) Solid Na2CO3.10H2O, (d) Conc. Sulphuric acid, (e) Iron (III) Chloride

Answer»

State whether a sample of each of the following would increase or decrease in mass if exposed to air.

(a) Solid NaOH, (b) Solid $C a C l_{2}$ ,

(c) Solid $N a_{2} C O_{3} .10 H_{2} O,$ (d) Conc. Sulphuric acid,

(e) Iron (III) Chloride

Discussion

2423.	What is the difference between global warming and greenhouse effect?
Answer» What is the difference between global warming and greenhouse effect?

Discussion

2424.	which of the following combination will produce h2 gas 1.Au metal and NaCN 2.zn metal and Nao
Answer» which of the following combination will produce h2 gas 1.Au metal and NaCN 2.zn metal and Nao

Discussion

2425.	Is there any formula for balancing the chemical reaction of combustion of hydrocarbons.?
Answer» Is there any formula for balancing the chemical reaction of combustion of hydrocarbons.?

Discussion

2426.	The density of water is maximum at :
Answer» The density of water is maximum at :

Discussion

2427.	Liez les éléments des colonnes A et B.1. Vous avez fait du ski? (a) Parce que le soleil brille.2. Pourquoi mets-tu tes lunettes de soliel (b) Oui, je peux voir des éclairs.3. Y a-t-il des orages? (c) Il a plu la nuit dernière.4. On ne voit pas le sommet de la montagne. (d) Oui, il y a beaucoup de neige.5. Les feuilles sont mouillées. (e) Il y a des nuages.
Answer» Liez les éléments des colonnes A et B. 1. Vous avez fait du ski? (a) Parce que le soleil brille. 2. Pourquoi mets-tu tes lunettes de soliel (b) Oui, je peux voir des éclairs. 3. Y a-t-il des orages? (c) Il a plu la nuit dernière. 4. On ne voit pas le sommet de la montagne. (d) Oui, il y a beaucoup de neige. 5. Les feuilles sont mouillées. (e) Il y a des nuages.

Discussion

2428.	What is the largest single cause of aircraft corrosion?
Answer» What is the largest single cause of aircraft corrosion?

Discussion

2429.	Question 3 Differentiate between Alpha, Beta and Gamma radiations on the basis of their characteristics. Write any two uses of radioactive isotopes in the field of agriculture.
Answer» Question 3 Differentiate between Alpha, Beta and Gamma radiations on the basis of their characteristics. Write any two uses of radioactive isotopes in the field of agriculture.

2429.

Question 3 Differentiate between Alpha, Beta and Gamma radiations on the basis of their characteristics. Write any two uses of radioactive isotopes in the field of agriculture.

Answer»

Question 3

Differentiate between Alpha, Beta and Gamma radiations on the basis of their characteristics.

Write any two uses of radioactive isotopes in the field of agriculture.

Discussion

2430.

Which of the following is the correct conclusion. Also, give the reason? Observation I II III Solution after reaction Colourless Colourless Colourless Metal Deposited Zn Cu Fe (a) Al is more reactive than Cu and Fe but less reactive than Zn(b) Al is more reactive than Cu but less reactive than Zn and Fe(c) Al is more reactive than Zn and Cu but less reactive than Fe(d) Al is more reactive than Zn, Cu, Fe.

Answer» Which of the following is the correct conclusion. Also, give the reason?

Observation	I	II	III
Solution after reaction	Colourless	Colourless	Colourless
Metal Deposited	Zn	Cu	Fe

(a) Al is more reactive than Cu and Fe but less reactive than Zn

(b) Al is more reactive than Cu but less reactive than Zn and Fe

(c) Al is more reactive than Zn and Cu but less reactive than Fe

(d) Al is more reactive than Zn, Cu, Fe.

Discussion

2431.	Question 4Food cans are coated with tin and not with zinc because:a) Zinc is costlier than tinb) Zinc has a higher melting point than tinc) Zinc is more reactive than tind) Zinc is less reactive than tin
Answer» Question 4 Food cans are coated with tin and not with zinc because: a) Zinc is costlier than tin b) Zinc has a higher melting point than tin c) Zinc is more reactive than tin d) Zinc is less reactive than tin

Discussion

2432.	Explain how energy is necessary in our life and explain what are the steps we should follow to save and conserve energy ?
Answer» Explain how energy is necessary in our life and explain what are the steps we should follow to save and conserve energy ?

Discussion

2433.	During an experimentto obe an additional lawThe gas is initially at temperaturevolume V. What will be the temperatthe gas when it expands to a volumeideal gas is fou155)VP- constaanar(1)T'=41(3) T-5 T
Answer» During an experimentto obe an additional lawThe gas is initially at temperaturevolume V. What will be the temperatthe gas when it expands to a volumeideal gas is fou155)VP- constaanar(1)T'=41(3) T-5 T

Discussion

2434.	Which of the following best describes chicken noodle soup?
Answer» Which of the following best describes chicken noodle soup?

Discussion

2435.	Question 5 (d)Solution in brief.What are the causes and consequences of deforestation?
Answer» Question 5 (d) Solution in brief. What are the causes and consequences of deforestation?

Discussion

2436.	Question 17In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?(a) 2H2(l)+O2(l)→2H2O(g) (b) 2H2(g)+O2(l)→2H2O(l) (c) 2H2(g)+O2(g)→2H2O(l) (d) 2H2(g)+O2(g)→2H2O(g)
Answer» Question 17 In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature? (a) $2 H_{2} (l) + O_{2} (l) \to 2 H_{2} O(g)$ (b) $2 H_{2} (g) + O_{2} (l) \to 2 H_{2} O(l)$ (c) $2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O(l)$ (d) $2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O(g)$

Discussion

2437.	Name the different zones of a burning candle.
Answer» Name the different zones of a burning candle.

Discussion

2438.	The heat of combustion of carbon to CO2 is -395.5kJ/mol. The heat released upon formation of 35.2 g of CO2 from carbon and oxygen gas is
Answer» The heat of combustion of carbon to CO2 is -395.5kJ/mol. The heat released upon formation of 35.2 g of CO2 from carbon and oxygen gas is

Discussion

2439.	Which fuel gives off the maximum heat when 1 kg of it is burnt? What is this amount of heat called?
Answer» Which fuel gives off the maximum heat when 1 kg of it is burnt? What is this amount of heat called?

Discussion

2440.	Producer gas contains mainly ___________.
Answer» Producer gas contains mainly ___________.

Discussion

2441.	In November 2016, the national capital city, New Delhi faced a severe increase in air pollution levels which continued for more than 2 weeks. Identify the major contributors to this situation from the below-given options.
Answer» In November 2016, the national capital city, New Delhi faced a severe increase in air pollution levels which continued for more than 2 weeks. Identify the major contributors to this situation from the below-given options.

Discussion

2442.	If the standard molar enthalpy change for combustion of graphite powder is −2.48×102 kJ mol−1. the amount of heat generated on combustion of 1g of graphite powder in kJ is (Nearest integer)
Answer» If the standard molar enthalpy change for combustion of graphite powder is $- 2.48 \times 10^{2} k J {mol}^{- 1} .$ the amount of heat generated on combustion of $1 g$ of graphite powder in $k J$ is (Nearest integer)

Discussion

2443.	The property of producing sound when beaten is found in:
Answer» The property of producing sound when beaten is found in:

Discussion

2444.	Out of the following, which metal cannot displace hydrogen gas from dil HCl or dil H2SO4?
Answer» Out of the following, which metal cannot displace hydrogen gas from dil $H C l$ or dil $H_{2} S O_{4}$ ?

Discussion

2445.	Question 12 Can the process of rusting be called combustion? Discuss.
Answer» Question 12 Can the process of rusting be called combustion? Discuss.

Discussion

2446.	An inductor has self induc†an ce 'L' and resis†an ce 'R'. Then find the time in which energy stored in the inductor will become 1/4th of maximum energy?
Answer» An inductor has self induc†an ce 'L' and resis†an ce 'R'. Then find the time in which energy stored in the inductor will become 1/4th of maximum energy?

Discussion

2447.	The approximate amount of oil left in an oil well after primary recovery process is:
Answer» The approximate amount of oil left in an oil well after primary recovery process is:

Discussion

2448.	Classify plastics on the basis of effect of heat on them.
Answer» Classify plastics on the basis of effect of heat on them.

Discussion

2449.	When sulphur is heated then a gas is formed which is when dissolved in water then a new substance is formed. The gas and new substance formed is:
Answer» When sulphur is heated then a gas is formed which is when dissolved in water then a new substance is formed. The gas and new substance formed is:

Discussion

2450.	What is the most abundant element in the universe by mass?
Answer» What is the most abundant element in the universe by mass?

Discussion

Explore topic-wise InterviewSolutions in .

0.2 gram of a gas X occupies a volume of 440 ml. If 0.1 gram of carbon dioxide occupies a volume off 320 ml at the same temperature and pressure then gas X would be

Arrange flurobenzene,chlorobenzene,bromobenzene,iodobenzene in order of their relative reactivity for electrophilic substitution reaction

Explain why saucepan handles are made of thermosetting plastics.

25 Equilibrium concentration of PCl5 , PCl3 & Cl2 are 4M ,2M &2M resp. PCl5 --- PCl3 + Cl2. If volume of container is doubled then at new equilibrium, concentration of reactant & product will be

Why are fires produced by burning oil not extinguished by pouring water ?

Shorea robusta is the botanical name of

Express the melting point of ice on the Celsius scale and the Fahrenheit scale.

Why is evaporation faster in the case of a china dish than a test tube?

Equal masses of O­2 and CH4 have been taken in same container of volume V at 25°C. The ratio of volume of gases effuses out initially from vessel is

Samples were taken from different parts of a mixture and tested. They were found to have exactly the same properties. What kind of mixture is it?

How does pouring water extinguish a fire ?

The reactant ′A′ could be:

What is stable atomic configuration and valency? Relate them?

Can you burn a piece of wood by bringing a lighted matchstick near it ? Explain.

what is the amount of sulphuric acid(in grams), required to react completely with 100 litres of ammonia at NTP

Zinc is more reactive than iron then how is it possible that a layer of zinc can protect bridges from rusting

43. The correct order of increasing solubility of AgCl in(A) Water(B) 0.1 М NaCl(C) 0.1 М ВаСl,(D) 0.1 M NH3is(1) A< B< C D(2) B < C

What is matter, and give some examples?

Which of the following is/are not the property of hydrogen?

Write any two physical properties of metals.

30.The temperature of 20 L of Nitrogen was increased from 100K to 300K at a constant pressure. the change in volume will be

State whether a sample of each of the following would increase or decrease in mass if exposed to air. (a) Solid NaOH, (b) Solid CaCl2, (c) Solid Na2CO3.10H2O, (d) Conc. Sulphuric acid, (e) Iron (III) Chloride

What is the difference between global warming and greenhouse effect?

which of the following combination will produce h2 gas 1.Au metal and NaCN 2.zn metal and Nao

Is there any formula for balancing the chemical reaction of combustion of hydrocarbons.?

The density of water is maximum at :

What is the largest single cause of aircraft corrosion?

Question 3 Differentiate between Alpha, Beta and Gamma radiations on the basis of their characteristics. Write any two uses of radioactive isotopes in the field of agriculture.

Question 4Food cans are coated with tin and not with zinc because:a) Zinc is costlier than tinb) Zinc has a higher melting point than tinc) Zinc is more reactive than tind) Zinc is less reactive than tin

Explain how energy is necessary in our life and explain what are the steps we should follow to save and conserve energy ?

During an experimentto obe an additional lawThe gas is initially at temperaturevolume V. What will be the temperatthe gas when it expands to a volumeideal gas is fou155)VP- constaanar(1)T'=41(3) T-5 T

Which of the following best describes chicken noodle soup?

Question 5 (d)Solution in brief.What are the causes and consequences of deforestation?

Question 17In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?(a) 2H2(l)+O2(l)→2H2O(g) (b) 2H2(g)+O2(l)→2H2O(l) (c) 2H2(g)+O2(g)→2H2O(l) (d) 2H2(g)+O2(g)→2H2O(g)

Name the different zones of a burning candle.

The heat of combustion of carbon to CO2 is -395.5kJ/mol. The heat released upon formation of 35.2 g of CO2 from carbon and oxygen gas is

Which fuel gives off the maximum heat when 1 kg of it is burnt? What is this amount of heat called?

Producer gas contains mainly ___________.

In November 2016, the national capital city, New Delhi faced a severe increase in air pollution levels which continued for more than 2 weeks. Identify the major contributors to this situation from the below-given options.

If the standard molar enthalpy change for combustion of graphite powder is −2.48×102 kJ mol−1. the amount of heat generated on combustion of 1g of graphite powder in kJ is (Nearest integer)

The property of producing sound when beaten is found in:

Out of the following, which metal cannot displace hydrogen gas from dil HCl or dil H2SO4?

Question 12 Can the process of rusting be called combustion? Discuss.

An inductor has self induc†an ce 'L' and resis†an ce 'R'. Then find the time in which energy stored in the inductor will become 1/4th of maximum energy?

The approximate amount of oil left in an oil well after primary recovery process is:

Classify plastics on the basis of effect of heat on them.

When sulphur is heated then a gas is formed which is when dissolved in water then a new substance is formed. The gas and new substance formed is:

What is the most abundant element in the universe by mass?

Equal masses of O2 and CH4 have been taken in same container of volume V at 25°C. The ratio of volume of gases effuses out initially from vessel is