15280 + Interview Questions in Chemistry Page 24 InterviewSolution

1151.	A gaseous hydrocarbon contains 82.76 % of carbon. Given that its vapour density is 29, find its molecular formula
Answer» A gaseous hydrocarbon contains 82.76 % of carbon. Given that its vapour density is 29, find its molecular formula

Discussion

1152.	If there are two sets A and B such that n(¯A∩¯B)=n(A∩B). Universal set contains 'x' elements. Then n (A) + n (B) is
Answer» If there are two sets A and B such that $n (¯ A \cap ¯ B) = n (A \cap B)$ . Universal set contains 'x' elements. Then n (A) + n (B) is

Discussion

1153.	What is the cause of chemical bonding of atoms of elements.
Answer» What is the cause of chemical bonding of atoms of elements.

Discussion

1154.	The metallic character of group 14 elements:
Answer» The metallic character of group 14 elements:

Discussion

1155.	Which of the following organic compounds are used in the manufacture of synthetic dyes?
Answer» Which of the following organic compounds are used in the manufacture of synthetic dyes?

Discussion

1156.	Derivation of assent formula
Answer» Derivation of assent formula

Discussion

1157.	What is the relationship between the electronic configuration of an element and its valency?
Answer» What is the relationship between the electronic configuration of an element and its valency?

Discussion

1158.	aAl(NO3)3+bSnSO4→cSn(NO3)2+dAl2(SO4)3Coefficients a,b,c and d respectively for the balanced equation is:
Answer» $a A l (N O_{3})_{3} + b S n S O_{4} \to c S n (N O_{3})_{2} + d A l_{2} (S O_{4})_{3}$ Coefficients $a, b, c$ and $d$ respectively for the balanced equation is:

Discussion

1159.	12. General electron filling of elements of period 6 follows the order A) ns(n - 2)f(n -1)d -np B) nsnp- (n-1)d (n-2)f C) ns-(n-1)d (n-2)fnp D) nsnp (n-2)f(n-1)d E) ns -(n-1)d- np-(n-2)f
Answer» 12. General electron filling of elements of period 6 follows the order A) ns(n - 2)f(n -1)d -np B) nsnp- (n-1)d (n-2)f C) ns-(n-1)d (n-2)fnp D) nsnp (n-2)f(n-1)d E) ns -(n-1)d- np-(n-2)f

Discussion

1160.

Match the column A with column B. Column A Column B (i) Sodium chloride (ii) Ammonium ion (iii) Carbon tetrachloride Covalent bond Ionic bond Covalent and coordinate bond

Answer»

Match the column A with column B.

Column A	Column B
(i) Sodium chloride (ii) Ammonium ion (iii) Carbon tetrachloride	Covalent bond Ionic bond Covalent and coordinate bond

Discussion

1161.	A solution of ethanol in water is 10% by volume. If the solution and pure ethanol have densities of 0.9866 g/ccand 0.785 g/cc respectively. The percent by weight is nearly
Answer» A solution of ethanol in water is 10% by volume. If the solution and pure ethanol have densities of 0.9866 g/ccand 0.785 g/cc respectively. The percent by weight is nearly

Discussion

1162.	24. 2 moles of HI when heated at 444degree Celsius until equilibrium is reached were found to be 22% dissociated. Calculate the equilibrium constant for the reaction.
Answer» 24. 2 moles of HI when heated at 444degree Celsius until equilibrium is reached were found to be 22% dissociated. Calculate the equilibrium constant for the reaction.

Discussion

1163.	hclo4 bond order
Answer» hclo4 bond order

Discussion

1164.

The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here are not the chemical symbols of the elements): a 3 b 4 c 5 d 6 e 7 f 8 g 9 h 10 i 11 j 12 k 13 l 14 m 15 n 16 o 17 p 18 (i) Which element has a bigger atom, a or f?(ii) Which element has a higher valency, k or o?(iii) Which element is more metallic, i or k?(iv) Which element is more non-metallic, d or g?(v) Select a letter which represents a non-metal of valency 2.(vi) Select a letter which represents a noble gas.

Answer» The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here are not the chemical symbols of the elements):

a 3	b 4		c 5	d 6	e 7	f 8	g 9	h 10
i 11	j 12		k 13	l 14	m 15	n 16	o 17	p 18

(i) Which element has a bigger atom, a or f?

(ii) Which element has a higher valency, k or o?

(iii) Which element is more metallic, i or k?

(iv) Which element is more non-metallic, d or g?

(v) Select a letter which represents a non-metal of valency 2.

(vi) Select a letter which represents a noble gas.

Discussion

1165.	(i) What is the special feature of the structure of:(a) C2H2(b) C2H4?(ii) What type of reaction is common to both of these compounds?
Answer» (i) What is the special feature of the structure of: (a) C₂H₂ (b) C₂H₄? (ii) What type of reaction is common to both of these compounds?

Discussion

1166.	Why Inner shell electrons do not take part in chemical bonding??
Answer» Why Inner shell electrons do not take part in chemical bonding??

Discussion

1167.	Define the following 1 Valency of an element with 5 eg. 2 Valence electron of an element with 5 eg.
Answer» Define the following 1 Valency of an element with 5 eg. 2 Valence electron of an element with 5 eg.

1167.

Define the following 1 Valency of an element with 5 eg. 2 Valence electron of an element with 5 eg.

Answer»

Define the following

1 Valency of an element with 5 eg.

2 Valence electron of an element with 5 eg.

Discussion

1168.	An example of a chemical change is _____.
Answer» An example of a chemical change is _____.

Discussion

1169.	Which of the following has the highest first ionization energy?
Answer» Which of the following has the highest first ionization energy?

Discussion

1170.	On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respectively are:
Answer» On treating a compound with warm dil. $H_{2} S O_{4},$ gas $X$ is evolved which turns $K_{2} C r_{2} O_{7}$ paper acidified with dil. $H_{2} S O_{4}$ to a green compound $Y .$ $X$ and $Y$ respectively are:

Discussion

1171.	Which of the following is/are metalloid?
Answer» Which of the following is/are metalloid?

Discussion

1172.	What are the elements present in stainless steel?
Answer» What are the elements present in stainless steel?

Discussion

1173.	The ion of hydrogen has the valency H+ means it give away 1 electron then what will hapen with no electron. Instead it can take one electron.
Answer» The ion of hydrogen has the valency H+ means it give away 1 electron then what will hapen with no electron. Instead it can take one electron.

Discussion

1174.	Write a fully balanced equation for the following case:Acetic acid is warmed with ethanol in the presence of concentrated sulphuric acid.
Answer» Write a fully balanced equation for the following case: Acetic acid is warmed with ethanol in the presence of concentrated sulphuric acid.

Discussion

1175.	Helium's subshell electron configuration is 1s2. But why helium not included on S Block elements?
Answer» Helium's subshell electron configuration is 1s². But why helium not included on S Block elements?

Discussion

1176.	A parallel beam of light of 600 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1.2 m away. It is observed that the first minimum is at a distance of 3mm from centre of the screen. Calculate the width of the slit.
Answer» A parallel beam of light of 600 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1.2 m away. It is observed that the first minimum is at a distance of 3mm from centre of the screen. Calculate the width of the slit.

Discussion

1177.	What are differences between alkane, alkene and alkyne?
Answer» What are differences between alkane, alkene and alkyne?

Discussion

1178.	Soaps are sodium or potassium salts of long chain ___.
Answer» Soaps are sodium or potassium salts of long chain ___.

Discussion

1179.	51.1 syrup is what type of mixture 2difference bw molecular and chemical compouds?
Answer» 51.1 syrup is what type of mixture 2difference bw molecular and chemical compouds?

Discussion

1180.	Differentiate between ionic and covalent bond
Answer» Differentiate between ionic and covalent bond

Discussion

1181.	A cuboidal vessel is 10 m long and 8 m wide. How high must it be made to hold 380 cubic metres of a liquid?
Answer» A cuboidal vessel is 10 m long and 8 m wide. How high must it be made to hold 380 cubic metres of a liquid?

Discussion

1182.	25. How to calculate effective nuclear charge (Z effective) of N+ ?
Answer» 25. How to calculate effective nuclear charge (Z effective) of N+ ?

Discussion

1183.	What type of reaction is represented by the diagestion of food in our body ?
Answer» What type of reaction is represented by the diagestion of food in our body ?

Discussion

1184.	Choose the correct definition of a mole.
Answer» Choose the correct definition of a mole.

1184.

Choose the correct definition of a mole.

Answer»

Choose the correct definition of a mole.

Discussion

1185.	The basicity of HCl is ___
Answer» The basicity of HCl is ___

Discussion

1186.	Suppose the chemists had chosen 1020 as the number of particles in a mole. What would be the molar mass of the oxygen gas?
Answer» Suppose the chemists had chosen $10^{20}$ as the number of particles in a mole. What would be the molar mass of the oxygen gas?

Discussion

1187.	Which neutral molecule will be isoelectric with ClO−?
Answer» Which neutral molecule will be isoelectric with $C l O^{-}$ ?

Discussion

1188.	Why does not dry HCl gas change the colour of the dry litmus paper?
Answer» Why does not dry $H C l$ gas change the colour of the dry litmus paper?

Discussion

1189.	The activation energy for the reaction 2HI(g)→ H_2 +I_{2 }(g) is 209.5 kJ mol^{-1} at 581 K.Calculate the fraction of molecules of reac†an ts having energy equal to or greater than activation energy?
Answer» The activation energy for the reaction 2HI(g)→ H_2 +I_{2 }(g) is 209.5 kJ mol^{-1} at 581 K.Calculate the fraction of molecules of reac†an ts having energy equal to or greater than activation energy?

Discussion

1190.	Question 27Suggest one word for each of the following statements/ definitions(a) The physical and biological world where we live in (b) Each level of food chain where transfer of energy takes place(c) The physical factors like temperature, rainfall, wind and soil of an ecosystem(d) Organisms which depend on the producers either directly or indirectly for food
Answer» Question 27 Suggest one word for each of the following statements/ definitions (a) The physical and biological world where we live in (b) Each level of food chain where transfer of energy takes place (c) The physical factors like temperature, rainfall, wind and soil of an ecosystem (d) Organisms which depend on the producers either directly or indirectly for food

1190.

Question 27Suggest one word for each of the following statements/ definitions(a) The physical and biological world where we live in (b) Each level of food chain where transfer of energy takes place(c) The physical factors like temperature, rainfall, wind and soil of an ecosystem(d) Organisms which depend on the producers either directly or indirectly for food

Answer»

Question 27

Suggest one word for each of the following statements/ definitions

(a) The physical and biological world where we live in

(b) Each level of food chain where transfer of energy takes place

(c) The physical factors like temperature, rainfall, wind and soil of an ecosystem

(d) Organisms which depend on the producers either directly or indirectly for food

Discussion

1191.	Oxygen is not evolved when:
Answer» Oxygen is not evolved when:

Discussion

1192.	Identify the popular water purification technique that is used for drinking purposes in domestic cities.
Answer» Identify the popular water purification technique that is used for drinking purposes in domestic cities.

Discussion

1193.	Choosing only words from the following list, write down appropriate words to fill in the blanks from (a) to (e) given below. Addition, carbohydrates, CnH2n2,CnH2n,CnH2n+2, electrochemical, homologous, hydrocarbon, saturated, substitution, unsaturated. The alkanes form a (a) ..... series with the general formula (b)....... . The alkanes are (c).......... (d) ..... which generally undergo (e) ...... reactions.
Answer» Choosing only words from the following list, write down appropriate words to fill in the blanks from (a) to (e) given below. Addition, carbohydrates, $C_{n} H_{2 n_{2}}, C_{n} H_{2 n}, C_{n} H_{2 n + 2}$ , electrochemical, homologous, hydrocarbon, saturated, substitution, unsaturated. The alkanes form a (a) ..... series with the general formula (b)....... . The alkanes are (c).......... (d) ..... which generally undergo (e) ...... reactions.

1193.

Choosing only words from the following list, write down appropriate words to fill in the blanks from (a) to (e) given below. Addition, carbohydrates, CnH2n2,CnH2n,CnH2n+2, electrochemical, homologous, hydrocarbon, saturated, substitution, unsaturated. The alkanes form a (a) ..... series with the general formula (b)....... . The alkanes are (c).......... (d) ..... which generally undergo (e) ...... reactions.

Answer»

Choosing only words from the following list, write down appropriate words to fill in the blanks from (a) to (e) given below.

Addition, carbohydrates, $C_{n} H_{2 n_{2}}, C_{n} H_{2 n}, C_{n} H_{2 n + 2}$ , electrochemical, homologous, hydrocarbon, saturated, substitution, unsaturated.

The alkanes form a (a) ..... series with the general formula (b)....... . The alkanes are (c).......... (d) ..... which generally undergo (e) ...... reactions.

Discussion

1194.	What is the percentage relative humidity on a day, when partial pressure of water vapour is 0.012×105 Pa and temperature is 12∘C.The vapor pressure of water at this temperature is 0.016×105 Pa
Answer» What is the percentage relative humidity on a day, when partial pressure of water vapour is $0.012 \times 10^{5} P a$ and temperature is $12^{\circ} C$ . The vapor pressure of water at this temperature is $0.016 \times 10^{5} P a$

Discussion

1195.	31 0.1 ml 0.001 M hcl solution is diluted with water to make 10 litres .calculate PH of the dilute solution.
Answer» 31 0.1 ml 0.001 M hcl solution is diluted with water to make 10 litres .calculate PH of the dilute solution.

Discussion

1196.	describe the fullerene structure of carbon and its uses
Answer» describe the fullerene structure of carbon and its uses

Discussion

1197.	Why hydrogen peroxide is non polar
Answer» Why hydrogen peroxide is non polar

Discussion

1198.	Which of the following reaction will occur during the substitution reaction of methane with chlorine to form carbon tetrachloride?
Answer» Which of the following reaction will occur during the substitution reaction of methane with chlorine to form carbon tetrachloride?

Discussion

1199.	what is difference between lindlars catalyst ,rosenmund catalyst and birch reduction
Answer» what is difference between lindlars catalyst ,rosenmund catalyst and birch reduction

Discussion

1200.	Which of the following ions form a coloured solution?
Answer» Which of the following ions form a coloured solution?

Discussion

Explore topic-wise InterviewSolutions in .

A gaseous hydrocarbon contains 82.76 % of carbon. Given that its vapour density is 29, find its molecular formula

If there are two sets A and B such that n(¯A∩¯B)=n(A∩B). Universal set contains 'x' elements. Then n (A) + n (B) is

What is the cause of chemical bonding of atoms of elements.

The metallic character of group 14 elements:

Which of the following organic compounds are used in the manufacture of synthetic dyes?

Derivation of assent formula

What is the relationship between the electronic configuration of an element and its valency?

aAl(NO3)3+bSnSO4→cSn(NO3)2+dAl2(SO4)3Coefficients a,b,c and d respectively for the balanced equation is:

12. General electron filling of elements of period 6 follows the order A) ns(n - 2)f(n -1)d -np B) nsnp- (n-1)d (n-2)f C) ns-(n-1)d (n-2)fnp D) nsnp (n-2)f(n-1)d E) ns -(n-1)d- np-(n-2)f

Match the column A with column B. Column A Column B (i) Sodium chloride (ii) Ammonium ion (iii) Carbon tetrachloride Covalent bond Ionic bond Covalent and coordinate bond

A solution of ethanol in water is 10% by volume. If the solution and pure ethanol have densities of 0.9866 g/ccand 0.785 g/cc respectively. The percent by weight is nearly

24. 2 moles of HI when heated at 444degree Celsius until equilibrium is reached were found to be 22% dissociated. Calculate the equilibrium constant for the reaction.

hclo4 bond order

(i) What is the special feature of the structure of:(a) C2H2(b) C2H4?(ii) What type of reaction is common to both of these compounds?

Why Inner shell electrons do not take part in chemical bonding??

Define the following 1 Valency of an element with 5 eg. 2 Valence electron of an element with 5 eg.

An example of a chemical change is _____.

Which of the following has the highest first ionization energy?

On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respectively are:

Which of the following is/are metalloid?

What are the elements present in stainless steel?

The ion of hydrogen has the valency H+ means it give away 1 electron then what will hapen with no electron. Instead it can take one electron.

Write a fully balanced equation for the following case:Acetic acid is warmed with ethanol in the presence of concentrated sulphuric acid.

Helium's subshell electron configuration is 1s2. But why helium not included on S Block elements?

A parallel beam of light of 600 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1.2 m away. It is observed that the first minimum is at a distance of 3mm from centre of the screen. Calculate the width of the slit.

What are differences between alkane, alkene and alkyne?

Soaps are sodium or potassium salts of long chain ___.

51.1 syrup is what type of mixture 2difference bw molecular and chemical compouds?

Differentiate between ionic and covalent bond

A cuboidal vessel is 10 m long and 8 m wide. How high must it be made to hold 380 cubic metres of a liquid?

25. How to calculate effective nuclear charge (Z effective) of N+ ?

What type of reaction is represented by the diagestion of food in our body ?

Choose the correct definition of a mole.

The basicity of HCl is ___

Suppose the chemists had chosen 1020 as the number of particles in a mole. What would be the molar mass of the oxygen gas?

Which neutral molecule will be isoelectric with ClO−?

Why does not dry HCl gas change the colour of the dry litmus paper?

The activation energy for the reaction 2HI(g)→ H_2 +I_{2 }(g) is 209.5 kJ mol^{-1} at 581 K.Calculate the fraction of molecules of reac†an ts having energy equal to or greater than activation energy?

Oxygen is not evolved when:

Identify the popular water purification technique that is used for drinking purposes in domestic cities.

What is the percentage relative humidity on a day, when partial pressure of water vapour is 0.012×105 Pa and temperature is 12∘C.The vapor pressure of water at this temperature is 0.016×105 Pa

31 0.1 ml 0.001 M hcl solution is diluted with water to make 10 litres .calculate PH of the dilute solution.

describe the fullerene structure of carbon and its uses

Why hydrogen peroxide is non polar

Which of the following reaction will occur during the substitution reaction of methane with chlorine to form carbon tetrachloride?

what is difference between lindlars catalyst ,rosenmund catalyst and birch reduction

Which of the following ions form a coloured solution?