7248 + Interview Questions in Chemistry Page 66 InterviewSolution

3251.	Ammonia is made artificially by reacting nitrogen and hydrogen at high pressures and temperatures in the presence of a catalyst in a process known as ___________.
Answer» Ammonia is made artificially by reacting nitrogen and hydrogen at high pressures and temperatures in the presence of a catalyst in a process known as ___________.

Discussion

3252.	Write the difference between Mixtures and Compounds.
Answer» Write the difference between Mixtures and Compounds.

Discussion

3253.	13. Calculate the rate constant for decomposition of ammonium nitrate from the following data NH4NO2 ---> N2 + 2H2O Time(minutes) : 10, 25, infinity Vol. Of N2 (ml) : 6.25, 13.65, 35.05
Answer» 13. Calculate the rate constant for decomposition of ammonium nitrate from the following data NH4NO2 ---> N2 + 2H2O Time(minutes) : 10, 25, infinity Vol. Of N2 (ml) : 6.25, 13.65, 35.05

Discussion

3254.	Hydrogen bond is strongest betweenA. Water and waterB.water and ammoniaC. Ammonia and ammonia
Answer» Hydrogen bond is strongest between A. Water and water B.water and ammonia C. Ammonia and ammonia

Discussion

3255.	Why is LPG Better than kerosene for cooking?
Answer» Why is LPG Better than kerosene for cooking?

Discussion

3256.	A mixture in which one component is completely dissolved in another is known as a _________.
Answer» A mixture in which one component is completely dissolved in another is known as a _________.

Discussion

3257.	Which among the following can be stored for an extended period?
Answer» Which among the following can be stored for an extended period?

Discussion

3258.	Define calorific value. Mention its unit too
Answer» Define calorific value. Mention its unit too

Discussion

3259.	what is exactly potential difference ?
Answer» what is exactly potential difference ?

Discussion

3260.	Water exists in which of the following form(s):
Answer» Water exists in which of the following form(s):

Discussion

3261.	Name 3 Noble Metals. [3 MARKS]
Answer» Name 3 Noble Metals. [3 MARKS]

Discussion

3262.	Choose the correct option to complete the following reaction: 4Na (s)+3CO2(g)→
Answer» Choose the correct option to complete the following reaction: $4 Na (s) + 3 {CO}_{2} (g) \to$

3262.

Choose the correct option to complete the following reaction: 4Na (s)+3CO2(g)→

Answer»

Choose the correct option to complete the following reaction:

$4 Na (s) + 3 {CO}_{2} (g) \to$

Discussion

3263.	In the following first order competing reactions:A+Reagent →ProductB+Reagent →ProductTheratio of K1/K2 if only 50% of B will have been reactedwhen 94% of A has been reacted in same time is:
Answer» In the following first order competing reactions: A+Reagent →Product B+Reagent →Product The ratio of K₁/K₂ if only 50% of B will have been reacted when 94% of A has been reacted in same time is:

3263.

In the following first order competing reactions:A+Reagent →ProductB+Reagent →ProductTheratio of K1/K2 if only 50% of B will have been reactedwhen 94% of A has been reacted in same time is:

Answer»

In the following first order competing reactions:

A+Reagent →Product

B+Reagent →Product

The
ratio of K₁/K₂ if only 50% of B will have been reacted
when 94% of A has been reacted in same time is:

Discussion

3264.	What will be the increasing trend of acidic character in C6H5COOH, CH3COOH, HCOOH, XCOOH, XCH3COOH, XC2H5COOH and C(Cl3)COOH.
Answer» What will be the increasing trend of acidic character in C6H5COOH, CH3COOH, HCOOH, XCOOH, XCH3COOH, XC2H5COOH and C(Cl3)COOH.

Discussion

3265.	In air , all the consisting gases remain uniformly mixed. Co2 which is lower than both N2 and O2 does not form the lower layer in the atmosphere. Why?
Answer» In air , all the consisting gases remain uniformly mixed. Co2 which is lower than both N2 and O2 does not form the lower layer in the atmosphere. Why?

Discussion

3266.	Why iron don't burn but iron filings do?
Answer» Why iron don't burn but iron filings do?

Discussion

3267.	When iron (Fe) is exposed to 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 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

3268.	The gas used for Combustion is _______
Answer» The gas used for Combustion is _______

Discussion

3269.	Give the electrolysis of CuSO4 in presence of Pt.Why S2O8^2- is formed?
Answer» Give the electrolysis of CuSO4 in presence of Pt.Why S2O8^2- is formed?

Discussion

3270.	Reliez les colones et faites des phrases selon l'exemple.1. une bougie (a) acier2. un pneu (b) cuir3. un mur (c) argent4. une ceinture (d) cire5. des ustensiles (e) caoutchouc6. une chaîne (f) pierre
Answer» Reliez les colones et faites des phrases selon l'exemple. 1. une bougie (a) acier 2. un pneu (b) cuir 3. un mur (c) argent 4. une ceinture (d) cire 5. des ustensiles (e) caoutchouc 6. une chaîne (f) pierre

Discussion

3271.	29. The order of reactivity of alcohols with sodium metal is: 1^° >2^° >3^° 3^° >2^° >1^°
Answer» 29. The order of reactivity of alcohols with sodium metal is: 1^° >2^° >3^° 3^° >2^° >1^°

Discussion

3272.	Identify the total number of substances that are malleable from the list given below:Iron, copper, oxygen, gold, sulphur3
Answer» Identify the total number of substances that are malleable from the list given below: Iron, copper, oxygen, gold, sulphur 3

Discussion

3273.	Conversion of ice into water is an example of
Answer» Conversion of ice into water is an example of

Discussion

3274.	Question 9(c)Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is(c) strongly acidic?
Answer» Question 9(c) Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is (c) strongly acidic?

Discussion

3275.	Question 1(ii)Show the formation of Na2O and MgO by the transfer of electrons.
Answer» Question 1(ii) Show the formation of ${Na}_{2} O$ and $MgO$ by the transfer of electrons.

Discussion

3276.	You are given the following materials:(i) Iron nails(ii) Copper sulphate solution(iii) Barium chloride solution(iv) Copper powder(v) Ferrous sulphate crystals(vi) QuicklimeIdentify the type of chemical reaction taking place when:(a) Barium chloride solution is mixed with copper sulphate solution and a white precipitate is observed.(b) On heating copper powder in air in a china dish, the surface of copper powder turns black.(c) On heating green coloured ferrous sulphate crystals, reddish brown solid is left and smell of a gas having odour of burning sulphur is experienced.(d) Iron nails when left dipped in blue colour copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.(e) Quick lime reacts vigorously with water releasing a large amount of heat.Write chemical equations for each one of the above reactions.
Answer» You are given the following materials: (i) Iron nails (ii) Copper sulphate solution (iii) Barium chloride solution (iv) Copper powder (v) Ferrous sulphate crystals (vi) Quicklime Identify the type of chemical reaction taking place when: (a) Barium chloride solution is mixed with copper sulphate solution and a white precipitate is observed. (b) On heating copper powder in air in a china dish, the surface of copper powder turns black. (c) On heating green coloured ferrous sulphate crystals, reddish brown solid is left and smell of a gas having odour of burning sulphur is experienced. (d) Iron nails when left dipped in blue colour copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away. (e) Quick lime reacts vigorously with water releasing a large amount of heat. Write chemical equations for each one of the above reactions.

Discussion

3277.	Complete the following reaction:Na2CO3(s)+H2SO4(aq)→ ?
Answer» Complete the following reaction: ${Na}_{2} {CO}_{3} (s) + H_{2} {SO}_{4} (aq) \to ?$

Discussion

3278.	What are the 4R's?
Answer» What are the 4R's?

Discussion

3279.	Select the salts out of the following elements: 1. HCl 2. NaCl 3. Cu(OH)2 4. CuSO4 5.CH3COOH 6. CH3COONa 7. Na2SO4 8. H2SO4 9.Ca(OH)2 10. CaCl2
Answer» Select the salts out of the following elements: 1. HCl 2. NaCl 3. ${C u (O H)}_{2}$ 4. ${C u S O}_{4}$ 5. ${C H}_{3} C O O H$ 6. ${C H}_{3} C O O N a$ 7. ${N a}_{2} {S O}_{4}$ 8. $H_{2} {S O}_{4}$ 9. ${C a (O H)}_{2}$ 10. ${C a C l}_{2}$

3279.

Select the salts out of the following elements: 1. HCl 2. NaCl 3. Cu(OH)2 4. CuSO4 5.CH3COOH 6. CH3COONa 7. Na2SO4 8. H2SO4 9.Ca(OH)2 10. CaCl2

Answer»

Select the salts out of the following elements:

1. HCl 2. NaCl 3. ${C u (O H)}_{2}$ 4. ${C u S O}_{4}$ 5. ${C H}_{3} C O O H$

6. ${C H}_{3} C O O N a$ 7. ${N a}_{2} {S O}_{4}$ 8. $H_{2} {S O}_{4}$ 9. ${C a (O H)}_{2}$ 10. ${C a C l}_{2}$

Discussion

3280.	Write the types of decomposition reactions with suitable examples.
Answer» Write the types of decomposition reactions with suitable examples.

Discussion

3281.	In the given reaction,Mg + 2HCl Gives MgCl2 + H2Calculate the volume of hydrogen released from 18g of magnesium
Answer» In the given reaction, Mg + 2HCl Gives MgCl2 + H2 Calculate the volume of hydrogen released from 18g of magnesium

Discussion

3282.	Why can coal not be prepared in a laboratory?
Answer» Why can coal not be prepared in a laboratory?

Discussion

3283.	Explain the effect of thermocol on environment and human health.
Answer» Explain the effect of thermocol on environment and human health.

Discussion

3284.	Question 1For the symbol H, D and T tabulate three sub-atomic particles found in each of them?
Answer» Question 1 For the symbol H, D and T tabulate three sub-atomic particles found in each of them?

Discussion

3285.	What are PET bottles made up of?
Answer» What are PET bottles made up of?

Discussion

3286.	A substance that is composed of two or more elements, chemically combined with one another in a fixed proportion is called a ____.
Answer» A substance that is composed of two or more elements, chemically combined with one another in a fixed proportion is called a ____.

Discussion

3287.	If a+b --- c is exothermic thenIs c --- a+b Necessarily endothermic?
Answer» If a+b --- c is exothermic then Is c --- a+b Necessarily endothermic?

Discussion

3288.	An organic compound containing C, H & O gave following analysis, C = 40%, H = 6.7%. Its empirical formula will be Options: CH4 , CH2O , C2H4O2 , C2H4
Answer» An organic compound containing C, H & O gave following analysis, C = 40%, H = 6.7%. Its empirical formula will be Options: CH4 , CH2O , C2H4O2 , C2H4

Discussion

3289.	Explain the differences.a. Weather and climateb. Degradable and non-degradable waste
Answer» Explain the differences. a. Weather and climate b. Degradable and non-degradable waste

Discussion

3290.	what is tan titha ?
Answer» what is tan titha ?

Discussion

3291.	Which of the following is not a property of an acid?
Answer» Which of the following is not a property of an acid?

Discussion

3292.	What are the characteristics of an ideal fuel?
Answer» What are the characteristics of an ideal fuel?

Discussion

3293.	What will be the new solution formed by mixing colloidal and suspension solution
Answer» What will be the new solution formed by mixing colloidal and suspension solution

Discussion

3294.	Why does the sea water contain salts?
Answer» Why does the sea water contain salts?

Discussion

3295.	ntVapour density of the equilibrium mixture of NO2 and N2O4 is found to be 40 for the equilibrium N2O ->2NO2The % of NO2 in the mixture isn ntn nt(a)26.08%n nt(b)50.82%n nt(c)68%n nt(d)92%n ntn
Answer» ntVapour density of the equilibrium mixture of NO2 and N2O4 is found to be 40 for the equilibrium N2O ->2NO2The % of NO2 in the mixture isn ntn nt(a)26.08%n nt(b)50.82%n nt(c)68%n nt(d)92%n ntn

Discussion

3296.	Which among the following methods is most suitable for the separation of dyes in black ink?
Answer» Which among the following methods is most suitable for the separation of dyes in black ink?

Discussion

3297.	3. What is the importance of displacement reaction in metal industry
Answer» 3. What is the importance of displacement reaction in metal industry

Discussion

3298.	Non metal with less melting point?
Answer» Non metal with less melting point?

Discussion

3299.	30. Manganese forms non-stochiometric oxides having the general formula MnO where atomicity of O is x. What will be the value of x for the compound that analysed 64% by mass Mn?
Answer» 30. Manganese forms non-stochiometric oxides having the general formula MnO where atomicity of O is x. What will be the value of x for the compound that analysed 64% by mass Mn?

Discussion

3300.	What is meant by an electrochemical cell?
Answer» What is meant by an electrochemical cell?

Discussion

Explore topic-wise InterviewSolutions in .

Ammonia is made artificially by reacting nitrogen and hydrogen at high pressures and temperatures in the presence of a catalyst in a process known as ___________.

Write the difference between Mixtures and Compounds.

13. Calculate the rate constant for decomposition of ammonium nitrate from the following data NH4NO2 ---> N2 + 2H2O Time(minutes) : 10, 25, infinity Vol. Of N2 (ml) : 6.25, 13.65, 35.05

Hydrogen bond is strongest betweenA. Water and waterB.water and ammoniaC. Ammonia and ammonia

Why is LPG Better than kerosene for cooking?

A mixture in which one component is completely dissolved in another is known as a _________.

Which among the following can be stored for an extended period?

Define calorific value. Mention its unit too

what is exactly potential difference ?

Water exists in which of the following form(s):

Name 3 Noble Metals. [3 MARKS]

Choose the correct option to complete the following reaction: 4Na (s)+3CO2(g)→

In the following first order competing reactions:A+Reagent →ProductB+Reagent →ProductTheratio of K1/K2 if only 50% of B will have been reactedwhen 94% of A has been reacted in same time is:

What will be the increasing trend of acidic character in C6H5COOH, CH3COOH, HCOOH, XCOOH, XCH3COOH, XC2H5COOH and C(Cl3)COOH.

In air , all the consisting gases remain uniformly mixed. Co2 which is lower than both N2 and O2 does not form the lower layer in the atmosphere. Why?

Why iron don't burn but iron filings do?

When iron (Fe) is exposed to 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?

The gas used for Combustion is _______

Give the electrolysis of CuSO4 in presence of Pt.Why S2O8^2- is formed?

Reliez les colones et faites des phrases selon l'exemple.1. une bougie (a) acier2. un pneu (b) cuir3. un mur (c) argent4. une ceinture (d) cire5. des ustensiles (e) caoutchouc6. une chaîne (f) pierre

29. The order of reactivity of alcohols with sodium metal is: 1^° >2^° >3^° 3^° >2^° >1^°

Identify the total number of substances that are malleable from the list given below:Iron, copper, oxygen, gold, sulphur3

Conversion of ice into water is an example of

Question 9(c)Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is(c) strongly acidic?

Question 1(ii)Show the formation of Na2O and MgO by the transfer of electrons.

Complete the following reaction:Na2CO3(s)+H2SO4(aq)→ ?

What are the 4R's?

Select the salts out of the following elements: 1. HCl 2. NaCl 3. Cu(OH)2 4. CuSO4 5.CH3COOH 6. CH3COONa 7. Na2SO4 8. H2SO4 9.Ca(OH)2 10. CaCl2

Write the types of decomposition reactions with suitable examples.

In the given reaction,Mg + 2HCl Gives MgCl2 + H2Calculate the volume of hydrogen released from 18g of magnesium

Why can coal not be prepared in a laboratory?

Explain the effect of thermocol on environment and human health.

Question 1For the symbol H, D and T tabulate three sub-atomic particles found in each of them?

What are PET bottles made up of?

A substance that is composed of two or more elements, chemically combined with one another in a fixed proportion is called a ____.

If a+b --- c is exothermic thenIs c --- a+b Necessarily endothermic?

An organic compound containing C, H & O gave following analysis, C = 40%, H = 6.7%. Its empirical formula will be Options: CH4 , CH2O , C2H4O2 , C2H4

Explain the differences.a. Weather and climateb. Degradable and non-degradable waste

what is tan titha ?

Which of the following is not a property of an acid?

What are the characteristics of an ideal fuel?

What will be the new solution formed by mixing colloidal and suspension solution

Why does the sea water contain salts?

ntVapour density of the equilibrium mixture of NO2 and N2O4 is found to be 40 for the equilibrium N2O ->2NO2The % of NO2 in the mixture isn ntn nt(a)26.08%n nt(b)50.82%n nt(c)68%n nt(d)92%n ntn

Which among the following methods is most suitable for the separation of dyes in black ink?

3. What is the importance of displacement reaction in metal industry

Non metal with less melting point?

30. Manganese forms non-stochiometric oxides having the general formula MnO where atomicity of O is x. What will be the value of x for the compound that analysed 64% by mass Mn?

What is meant by an electrochemical cell?