15280 + Interview Questions in Chemistry Page 38 InterviewSolution

1851.	Find out the relationship between molecular mass of A nad B. Pressure of 1g gasA at 27^° C is 2atm. Pressure becomes 3atm when 2g of another gasB is is introduced in the same flask.
Answer» Find out the relationship between molecular mass of A nad B. Pressure of 1g gasA at 27^° C is 2atm. Pressure becomes 3atm when 2g of another gasB is is introduced in the same flask.

Discussion

1852.	Which of the following limits the number of trophic levels in a food chain? (a) insufficient food supply from producer level (b) decrease in energy at higher trophic levels (c) increase in the number of organisms at higher trophic levels (d) accumulation of harmful chemicals at higher trophic levels
Answer» Which of the following limits the number of trophic levels in a food chain? (a) insufficient food supply from producer level (b) decrease in energy at higher trophic levels (c) increase in the number of organisms at higher trophic levels (d) accumulation of harmful chemicals at higher trophic levels

1852.

Which of the following limits the number of trophic levels in a food chain? (a) insufficient food supply from producer level (b) decrease in energy at higher trophic levels (c) increase in the number of organisms at higher trophic levels (d) accumulation of harmful chemicals at higher trophic levels

Answer»

Which of the following limits the number of trophic levels in a food chain?

(a) insufficient food supply from producer level

(b) decrease in energy at higher trophic levels

(c) increase in the number of organisms at higher trophic levels

(d) accumulation of harmful chemicals at higher trophic levels

Discussion

1853.	On which concept is the following based on: Vmp is inversely proportional to root of molecular mass
Answer» On which concept is the following based on: Vmp is inversely proportional to root of molecular mass

Discussion

1854.	Identify the substance shown below which is formed from decayed plants and animals, over millions of years.
Answer» Identify the substance shown below which is formed from decayed plants and animals, over millions of years.

Discussion

1855.	A student placed a clean iron nail in blue coloured copper sulphate solution for a considerable time. He observes that :(1) iron nail gets green coating(2) iron nail gets brown coating(3) iron nail gets no coating(4) iron nail gets blue coating
Answer» A student placed a clean iron nail in blue coloured copper sulphate solution for a considerable time. He observes that : (1) iron nail gets green coating (2) iron nail gets brown coating (3) iron nail gets no coating (4) iron nail gets blue coating

Discussion

1856.	An element E forms an oxide E2O. . An aqueous solution of E2O turns red litmus paper blue. (a) What is the nature fo the oxide E2O (b) State whether element E is a metal or a non-metal. (c) Give one example of an element like E.
Answer» An element E forms an oxide $E_{2} O .$ . An aqueous solution of $E_{2} O$ turns red litmus paper blue. (a) What is the nature fo the oxide $E_{2} O$ (b) State whether element E is a metal or a non-metal. (c) Give one example of an element like E.

Discussion

1857.	25.What is the order of bond strength in ClO3 and ClO2? Also calculate the bond order of each of the above.
Answer» 25.What is the order of bond strength in ClO3 and ClO2? Also calculate the bond order of each of the above.

Discussion

1858.	Aqueous solution of Potassium permanganate is known as:
Answer» Aqueous solution of Potassium permanganate is known as:

Discussion

1859.	For each of the substances listed below, explain its role in the extraction of aluminium:(a) bauxite(b) sodium hydroxide(c) cryolite(d) graphite
Answer» For each of the substances listed below, explain its role in the extraction of aluminium: (a) bauxite (b) sodium hydroxide (c) cryolite (d) graphite

Discussion

1860.	Can we writeCOOH as co2
Answer» Can we writeCOOH as co₂

Discussion

1861.	Δ cU^° of combustion of CH4(g) at certain temperature is-100kJ/mol. The value of △_cH^° is 1)equal to △_cU^° 2)△_cU^° 4)zero
Answer» Δ cU^° of combustion of CH4(g) at certain temperature is-100kJ/mol. The value of △_cH^° is 1)equal to △_cU^° 2)△_cU^° 4)zero

Discussion

1862.	Question 5(c)Write word equations and then balanced equations for the reaction taking place when –(c) Dilute sulphuric acid reacts with aluminium powder.
Answer» Question 5(c) Write word equations and then balanced equations for the reaction taking place when – (c) Dilute sulphuric acid reacts with aluminium powder.

Discussion

1863.	Q.Asseration:Diamond and graphite do not have the same crystal structure. Reason: Diamond is crystalline while graphite is amorphous
Answer» Q.Asseration:Diamond and graphite do not have the same crystal structure. Reason: Diamond is crystalline while graphite is amorphous

Discussion

1864.	We all know that Hydrogen has 1 proton and 1 elecron and no neutron.As per rule proton and electron attracts each other so why electorn rotate aroun proton ? why they dont get stick to each other ?
Answer» We all know that Hydrogen has 1 proton and 1 elecron and no neutron.As per rule proton and electron attracts each other so why electorn rotate aroun proton ? why they dont get stick to each other ?

Discussion

1865.	Give two important uses of washing soda and baking soda.
Answer» Give two important uses of washing soda and baking soda.

Discussion

1866.	What would happen to the number of rabbits and grass plants if the number of foxes: (a) increased? (b) decreased?
Answer» What would happen to the number of rabbits and grass plants if the number of foxes: (a) increased? (b) decreased?

Discussion

1867.	Why is sodium stored in kerosene in a laboratory?
Answer» Why is sodium stored in kerosene in a laboratory?

Discussion

1868.	Which of the following configurations represent atoms of the elements having the highest second ionization energy?
Answer» Which of the following configurations represent atoms of the elements having the highest second ionization energy?

1868.

Which of the following configurations represent atoms of the elements having the highest second ionization energy?

Answer»

Which of the following configurations represent atoms of the elements having the highest second ionization energy?

Discussion

1869.	Can limiting reagent be found only if there is two reactants in a chemical reaction ?
Answer» Can limiting reagent be found only if there is two reactants in a chemical reaction ?

Discussion

1870.	Sulphuric acid has the highest importance in the chemical industry. Why?
Answer» Sulphuric acid has the highest importance in the chemical industry. Why?

Discussion

1871.	20. the strongest dichlorobutanoic acid is?why? A.2,3-dichlorobutanoic acid B. 2,2-dichlorobutanoic acid C. 3,4-dichlorobutanoic acid D. 4,4-dichlorobutanoic acid
Answer» 20. the strongest dichlorobutanoic acid is?why? A.2,3-dichlorobutanoic acid B. 2,2-dichlorobutanoic acid C. 3,4-dichlorobutanoic acid D. 4,4-dichlorobutanoic acid

Discussion

1872.	What is the meaning of solute ?
Answer» What is the meaning of solute ?

Discussion

1873.	Carbon form two oxides containing 42.9% an d 27.3% carbons respectively. which law of chemical combination does this iustrate.
Answer» Carbon form two oxides containing 42.9% an d 27.3% carbons respectively. which law of chemical combination does this iustrate.

Discussion

1874.	Which of the following metal is the main constituents of haemoglobin?
Answer» Which of the following metal is the main constituents of haemoglobin?

Discussion

1875.	13.When gases are heated from 20^° to 40^° at constant pressure, the volumes(1) Decrease by the same magnitude(2) Become double13) Increase in the ratio of their molecular masses(4) Increase
Answer» 13.When gases are heated from 20^° to 40^° at constant pressure, the volumes(1) Decrease by the same magnitude(2) Become double13) Increase in the ratio of their molecular masses(4) Increase

Discussion

1876.	The correct order of catenation is :
Answer» The correct order of catenation is :

Discussion

1877.	What is equivalent weight of potash alum , Mohr's salt with explanation?
Answer» What is equivalent weight of potash alum , Mohr's salt with explanation?

Discussion

1878.	One of the following salts will give an alkaline solution on dissolving in water. This is : (a) Na2CO3 (b) Na2SO4 (c) NaCl (d) (NH4)2SO4
Answer» One of the following salts will give an alkaline solution on dissolving in water. This is : (a) $N a_{2} C O_{3}$ (b) $N a_{2} S O_{4}$ (c) $N a C l$ (d) $(N H_{4})_{2} S O_{4}$

1878.

One of the following salts will give an alkaline solution on dissolving in water. This is : (a) Na2CO3 (b) Na2SO4 (c) NaCl (d) (NH4)2SO4

Answer»

One of the following salts will give an alkaline solution on dissolving in water. This is :

(a) $N a_{2} C O_{3}$

(b) $N a_{2} S O_{4}$

(c) $N a C l$

(d) $(N H_{4})_{2} S O_{4}$

Discussion

1879.	Complete the incomplete statements with missing words:(a) Metals are _________ while non-metals are ___________ poor conductors of heat.(b) Metals are malleable while non-metals are ___________.(c) Metals form positive ions while non-metals ___________.(d) Non-metals form acidic oxides while metals form __________.
Answer» Complete the incomplete statements with missing words: (a) Metals are _________ while non-metals are ___________ poor conductors of heat. (b) Metals are malleable while non-metals are ___________. (c) Metals form positive ions while non-metals ___________. (d) Non-metals form acidic oxides while metals form __________.

Discussion

1880.	How to find the partial charge ?; It's formula
Answer» How to find the partial charge ?; It's formula

Discussion

1881.	Difference between williamson synthesis and williamson continuous etherification reaction
Answer» Difference between williamson synthesis and williamson continuous etherification reaction

Discussion

1882.	Which of the following carbocation is most stable? (1) CH_3-CH^+-Cl (2)CH_3-C^+H_2 (3)CH_2=C^+H (4)CH_3-C^+H-NO_{
Answer» Which of the following carbocation is most stable? (1) CH_3-CH^+-Cl (2)CH_3-C^+H_2 (3)CH_2=C^+H (4)CH_3-C^+H-NO_{

Discussion

1883.	The electronic configuration of two elements A and B are 2,8,2 and 2,6 respectively. What type of compound is formed when they combine?
Answer» The electronic configuration of two elements A and B are 2,8,2 and 2,6 respectively. What type of compound is formed when they combine?

Discussion

1884.	Just pick any readymade packet of any ‘good quality’ eatable, say a biscuit packet, and study the packaging – do you see the number of protective layers used?
Answer» Just pick any readymade packet of any ‘good quality’ eatable, say a biscuit packet, and study the packaging – do you see the number of protective layers used?

Discussion

1885.	Minimum pH is shown by aqueous solution of1.0.1M BaCl22.0.1M BeCl23.0.1M Ba(NO3)24.0.1M Ba(OH)2
Answer» Minimum pH is shown by aqueous solution of 1.0.1M BaCl2 2.0.1M BeCl2 3.0.1M Ba(NO3)2 4.0.1M Ba(OH)2

Discussion

1886.	What is Electroplating ? Describe an activity to show the steel spoons electroplated with silver.
Answer» What is Electroplating ? Describe an activity to show the steel spoons electroplated with silver.

Discussion

1887.	75.Is Hcooh is known as farmic acid if yes why
Answer» 75.Is Hcooh is known as farmic acid if yes why

Discussion

1888.	Ammonia burns in oxygen and the combustion, in the presence of a catalyst, may be represented by: 2NH3+212O2→2NO+3H2O [H=1:N=14:O=16.] What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?
Answer» Ammonia burns in oxygen and the combustion, in the presence of a catalyst, may be represented by: $2 N H_{3} + 2 \frac{1}{2} O_{2} \to 2 N O + 3 H_{2} O [H = 1 : N = 14 : O = 16.]$ What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?

1888.

Ammonia burns in oxygen and the combustion, in the presence of a catalyst, may be represented by: 2NH3+212O2→2NO+3H2O [H=1:N=14:O=16.] What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?

Answer»

Ammonia burns in oxygen and the combustion, in the presence of a catalyst, may be represented by:
$2 N H_{3} + 2 \frac{1}{2} O_{2} \to 2 N O + 3 H_{2} O [H = 1 : N = 14 : O = 16.]$

What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?

Discussion

1889.	What are the types of chemical reactions? what are they? give examples for each of the chemical reaction?
Answer» What are the types of chemical reactions? what are they? give examples for each of the chemical reaction?

Discussion

1890.	which of the following can be used for clotting of blood efficiently?
Answer» which of the following can be used for clotting of blood efficiently?

Discussion

1891.	Does cl2 add to both the carbons of ethane (forming vicinal dihalide) during halogenation in sunlight or to one carbon only?
Answer» Does cl2 add to both the carbons of ethane (forming vicinal dihalide) during halogenation in sunlight or to one carbon only?

Discussion

1892.	The first ionization energy (in kJ/mol) of Na,Mg,Al and Si respectively, are
Answer» The first ionization energy (in kJ/mol) of $N a, M g, A l$ and $S i$ respectively, are

Discussion

1893.	73. Which of the following is the most acidic in nature ? A. Benzene with OH group B. CH3COOH C. Benzene with OH and OCH3 at para position D. Benzene with 2 OH at para para position
Answer» 73. Which of the following is the most acidic in nature ? A. Benzene with OH group B. CH3COOH C. Benzene with OH and OCH3 at para position D. Benzene with 2 OH at para para position

Discussion

1894.	100 ml of 0.5 M H2SO4 solution is neutralised by 50 ml of 0.1 M NaOH and x ml of 0.1 M Ca(OH)2. The value of x is
Answer» 100 ml of 0.5 M H2SO4 solution is neutralised by 50 ml of 0.1 M NaOH and x ml of 0.1 M Ca(OH)2. The value of x is

Discussion

1895.	Human beings depend on the resources of__.
Answer» Human beings depend on the resources of__.

Discussion

1896.	How many unshared pair of electrons does an ammonia molecule have?
Answer» How many unshared pair of electrons does an ammonia molecule have?

Discussion

1897.	What do you notice when acetic acid reacts with (a) litmus, (b) metals, (c) alkalies, (d) alcohol?
Answer» What do you notice when acetic acid reacts with (a) litmus, (b) metals, (c) alkalies, (d) alcohol?

1897.

What do you notice when acetic acid reacts with (a) litmus, (b) metals, (c) alkalies, (d) alcohol?

Answer»

What do you notice when acetic acid reacts with
(a) litmus,

(b) metals,
(c) alkalies,

(d) alcohol?

Discussion

1898.	Which of the following is not the property of water?
Answer» Which of the following is not the property of water?

Discussion

1899.	Why HNO3 does not react with most metals? But it reacts with Mn.This is why?
Answer» Why HNO3 does not react with most metals? But it reacts with Mn.This is why?

Discussion

1900.	Explain the significance of the following in the extraction of aluminium.(i) Bauxite(ii) Sodium hydroxide(iii) Cryolite(iv) Graphite
Answer» Explain the significance of the following in the extraction of aluminium. (i) Bauxite (ii) Sodium hydroxide (iii) Cryolite (iv) Graphite

Discussion

Explore topic-wise InterviewSolutions in .

Find out the relationship between molecular mass of A nad B. Pressure of 1g gasA at 27^° C is 2atm. Pressure becomes 3atm when 2g of another gasB is is introduced in the same flask.

On which concept is the following based on: Vmp is inversely proportional to root of molecular mass

Identify the substance shown below which is formed from decayed plants and animals, over millions of years.

A student placed a clean iron nail in blue coloured copper sulphate solution for a considerable time. He observes that :(1) iron nail gets green coating(2) iron nail gets brown coating(3) iron nail gets no coating(4) iron nail gets blue coating

An element E forms an oxide E2O. . An aqueous solution of E2O turns red litmus paper blue. (a) What is the nature fo the oxide E2O (b) State whether element E is a metal or a non-metal. (c) Give one example of an element like E.

25.What is the order of bond strength in ClO3 and ClO2? Also calculate the bond order of each of the above.

Aqueous solution of Potassium permanganate is known as:

For each of the substances listed below, explain its role in the extraction of aluminium:(a) bauxite(b) sodium hydroxide(c) cryolite(d) graphite

Can we writeCOOH as co2

Δ cU^° of combustion of CH4(g) at certain temperature is-100kJ/mol. The value of △_cH^° is 1)equal to △_cU^° 2)△_cU^° 4)zero

Question 5(c)Write word equations and then balanced equations for the reaction taking place when –(c) Dilute sulphuric acid reacts with aluminium powder.

Q.Asseration:Diamond and graphite do not have the same crystal structure. Reason: Diamond is crystalline while graphite is amorphous

We all know that Hydrogen has 1 proton and 1 elecron and no neutron.As per rule proton and electron attracts each other so why electorn rotate aroun proton ? why they dont get stick to each other ?

Give two important uses of washing soda and baking soda.

What would happen to the number of rabbits and grass plants if the number of foxes: (a) increased? (b) decreased?

Why is sodium stored in kerosene in a laboratory?

Which of the following configurations represent atoms of the elements having the highest second ionization energy?

Can limiting reagent be found only if there is two reactants in a chemical reaction ?

Sulphuric acid has the highest importance in the chemical industry. Why?

20. the strongest dichlorobutanoic acid is?why? A.2,3-dichlorobutanoic acid B. 2,2-dichlorobutanoic acid C. 3,4-dichlorobutanoic acid D. 4,4-dichlorobutanoic acid

What is the meaning of solute ?

Carbon form two oxides containing 42.9% an d 27.3% carbons respectively. which law of chemical combination does this iustrate.

Which of the following metal is the main constituents of haemoglobin?

13.When gases are heated from 20^° to 40^° at constant pressure, the volumes(1) Decrease by the same magnitude(2) Become double13) Increase in the ratio of their molecular masses(4) Increase

The correct order of catenation is :

What is equivalent weight of potash alum , Mohr's salt with explanation?

One of the following salts will give an alkaline solution on dissolving in water. This is : (a) Na2CO3 (b) Na2SO4 (c) NaCl (d) (NH4)2SO4

How to find the partial charge ?; It's formula

Difference between williamson synthesis and williamson continuous etherification reaction

Which of the following carbocation is most stable? (1) CH_3-CH^+-Cl (2)CH_3-C^+H_2 (3)CH_2=C^+H (4)CH_3-C^+H-NO_{

The electronic configuration of two elements A and B are 2,8,2 and 2,6 respectively. What type of compound is formed when they combine?

Just pick any readymade packet of any ‘good quality’ eatable, say a biscuit packet, and study the packaging – do you see the number of protective layers used?

Minimum pH is shown by aqueous solution of1.0.1M BaCl22.0.1M BeCl23.0.1M Ba(NO3)24.0.1M Ba(OH)2

What is Electroplating ? Describe an activity to show the steel spoons electroplated with silver.

75.Is Hcooh is known as farmic acid if yes why

Ammonia burns in oxygen and the combustion, in the presence of a catalyst, may be represented by: 2NH3+212O2→2NO+3H2O [H=1:N=14:O=16.] What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?

What are the types of chemical reactions? what are they? give examples for each of the chemical reaction?

which of the following can be used for clotting of blood efficiently?

Does cl2 add to both the carbons of ethane (forming vicinal dihalide) during halogenation in sunlight or to one carbon only?

The first ionization energy (in kJ/mol) of Na,Mg,Al and Si respectively, are

73. Which of the following is the most acidic in nature ? A. Benzene with OH group B. CH3COOH C. Benzene with OH and OCH3 at para position D. Benzene with 2 OH at para para position

100 ml of 0.5 M H2SO4 solution is neutralised by 50 ml of 0.1 M NaOH and x ml of 0.1 M Ca(OH)2. The value of x is

Human beings depend on the resources of__.

How many unshared pair of electrons does an ammonia molecule have?

What do you notice when acetic acid reacts with (a) litmus, (b) metals, (c) alkalies, (d) alcohol?

Which of the following is not the property of water?

Why HNO3 does not react with most metals? But it reacts with Mn.This is why?

Explain the significance of the following in the extraction of aluminium.(i) Bauxite(ii) Sodium hydroxide(iii) Cryolite(iv) Graphite