10223 + Interview Questions in Chemistry Page 117 InterviewSolution

5801.	1. An organic compound contains carbon, hydrogen, and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67. The empirical formula of the compound would be.
Answer» 1. An organic compound contains carbon, hydrogen, and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67. The empirical formula of the compound would be.

Discussion

5802.	What do you understand by hydrolysis? Explain giving examples.
Answer» What do you understand by hydrolysis? Explain giving examples.

Discussion

5803.	0.5g of Ba(OH)2 , 0.01 mol Ba(OH)2 and 0.01 eq. Ba(OH)2 were together diluted to one litre. Calculate the normality of basic solution.
Answer» 0.5g of Ba(OH)2 , 0.01 mol Ba(OH)2 and 0.01 eq. Ba(OH)2 were together diluted to one litre. Calculate the normality of basic solution.

Discussion

5804.	Question 25Fill in the blanks (a) A colloid is a mixture and its components can be separated by the technique known as___.(b) Ice; water and water vapour look different and display different ___ properties but they are ___ the same.(c) A mixture of chloroform and water are taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be of ___ and the lower layer will be that of ______ and the lower layer will be that of____.(d) A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called ___.(e) When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the ___ of light by milk and the phenomenon is called ___. This indicates that milk is a ___ solution.
Answer» Question 25 Fill in the blanks (a) A colloid is a mixture and its components can be separated by the technique known as___. (b) Ice; water and water vapour look different and display different ___ properties but they are ___ the same. (c) A mixture of chloroform and water are taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be of ___ and the lower layer will be that of ______ and the lower layer will be that of____. (d) A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called ___. (e) When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the ___ of light by milk and the phenomenon is called ___. This indicates that milk is a ___ solution.

Discussion

5805.	The energy gap of silicon is 1.14 eV .The maximum wavelength ( in Angstrom) at which silicon will begin absorbing energy is ( Take hc=12400 eV−A∘)
Answer» The energy gap of silicon is 1.14 eV .The maximum wavelength ( in Angstrom) at which silicon will begin absorbing energy is ( Take $h c = 12400 e V - A^{\circ}$ )

Discussion

5806.	24.While representing NaCl ionic bond through lewis dot structure, why only the octet of Cl is represented by dots and Na atom's octet is not represented?
Answer» 24.While representing NaCl ionic bond through lewis dot structure, why only the octet of Cl is represented by dots and Na atom's octet is not represented?

Discussion

5807.	What is the ratio of masses of proton to the masses of electron?
Answer» What is the ratio of masses of proton to the masses of electron?

Discussion

5808.	What are the no. of moles of atoms in 4.32 g of c(NO3)3? (At. mass :Sc=45.0;O=16;N=14.01)
Answer» What are the no. of moles of atoms in 4.32 g of c(NO3)3? (At. mass :Sc=45.0;O=16;N=14.01)

Discussion

5809.	40. If Cu2 positive/Cu electrode is diluted 100 times then change in emf is give me solution
Answer» 40. If Cu2 positive/Cu electrode is diluted 100 times then change in emf is give me solution

Discussion

5810.	what is the pressure cooker mechanism ?bp increas or decreasevp increase or decreaseexplain
Answer» what is the pressure cooker mechanism ? bp increas or decrease vp increase or decrease explain

Discussion

5811.	what are the soft metals?
Answer» what are the soft metals?

Discussion

5812.	What are the types of carbon compounds? Explain each with suitable examples.
Answer» What are the types of carbon compounds? Explain each with suitable examples.

Discussion

5813.	Sodium metals are stored in
Answer» Sodium metals are stored in

Discussion

5814.	Choosing only substances from the list given in the box below , write equations for the reactions which you would use in the laboratory to obtain : Dilute sulphuric acid. Copper Copper carbonate Iron Sodium carbonate Sodium Zinc (a) Sodium sulphate (b) Copper sulphate (c) Iron (II) sulphate (d) Zinc carbonate
Answer» Choosing only substances from the list given in the box below , write equations for the reactions which you would use in the laboratory to obtain : Dilute sulphuric acid. Copper Copper carbonate Iron Sodium carbonate Sodium Zinc (a) Sodium sulphate (b) Copper sulphate (c) Iron (II) sulphate (d) Zinc carbonate

Discussion

5815.	Question 3 (a) Give reasons A gas fills completely the vessel in which it is kept.
Answer» Question 3 (a) Give reasons A gas fills completely the vessel in which it is kept.

Discussion

5816.	How fluorine shows +1 oxidation state in HOF
Answer» How fluorine shows +1 oxidation state in HOF

Discussion

5817.	The temperature at which a solid changes into liquid at atmospheric pressure is called :
Answer» The temperature at which a solid changes into liquid at atmospheric pressure is called :

Discussion

5818.	The dyes present in fountain pen ink can be separated by the technique of : (a) fractional distillation (b) infrared photography (c) crystallisation (d) chromatography
Answer» The dyes present in fountain pen ink can be separated by the technique of : (a) fractional distillation (b) infrared photography (c) crystallisation (d) chromatography

5818.

The dyes present in fountain pen ink can be separated by the technique of : (a) fractional distillation (b) infrared photography (c) crystallisation (d) chromatography

Answer»

The dyes present in fountain pen ink can be separated by the technique of :

(a) fractional distillation (b) infrared photography (c) crystallisation (d) chromatography

Discussion

5819.	Which of the following compounds is DDT?
Answer» Which of the following compounds is DDT?

Discussion

5820.	How to find sigma and π bond in the molecules.explain in brief
Answer» How to find sigma and π bond in the molecules.explain in brief

Discussion

5821.	What is the pH of 0.00000001M HCl aqueous solution?
Answer» What is the pH of 0.00000001M HCl aqueous solution?

Discussion

5822.	Question 4What is a covalent bond? Classify the types of covalent bonds.
Answer» Question 4 What is a covalent bond? Classify the types of covalent bonds.

5822.

Question 4What is a covalent bond? Classify the types of covalent bonds.

Answer»

Question 4

What is a covalent bond? Classify the types of covalent bonds.

Discussion

5823.	How does fishes and aquatic animals survive when the pond gets covered with thick ice ?
Answer» How does fishes and aquatic animals survive when the pond gets covered with thick ice ?

Discussion

5824.	why collision theory satisfactorily explains only bimolecular reactions why not reactions of 1st ,2nd or any other order ?
Answer» why collision theory satisfactorily explains only bimolecular reactions why not reactions of 1st ,2nd or any other order ?

Discussion

5825.	At what temperature in ∘C will the volume of gas which is originally at 1∘C will double itself at constant pressure.
Answer» At what temperature in $^{\circ} C$ will the volume of gas which is originally at $1^{\circ} C$ will double itself at constant pressure.

Discussion

5826.	A U-tube is partially filled with water. An immiscible oil having density 0.8g/cc is poured into one side until water rises by 25 cm on the other side. the level of oil will s†an d higher than the water level by
Answer» A U-tube is partially filled with water. An immiscible oil having density 0.8g/cc is poured into one side until water rises by 25 cm on the other side. the level of oil will s†an d higher than the water level by

Discussion

5827.	Give equation to express the reaction between : (a) steam and red hot iron (b) calcium and water
Answer» Give equation to express the reaction between : (a) steam and red hot iron (b) calcium and water

5827.

Give equation to express the reaction between : (a) steam and red hot iron (b) calcium and water

Answer»

Give equation to express the reaction between :

(a) steam and red hot iron

(b) calcium and water

Discussion

5828.	tell the strong and weak acids and also strong and weak bases
Answer» tell the strong and weak acids and also strong and weak bases

Discussion

5829.	Which of the following reaction involved in extraction of copper from chalcopyrite?
Answer» Which of the following reaction involved in extraction of copper from chalcopyrite?

Discussion

5830.	At 25 ∘C, the standard oxidation potentials of Zn and Ag in water are:Zn(s)→Zn+2(aq)+2e−, E0=0.76 Vand Ag(s)→Ag+(aq)+e−, E0=−0.80 V.Which of the following reaction actually takes place?
Answer» At $25^{\circ} C$ , the standard oxidation potentials of $Z n and A g$ in water are: $Z n (s) \to Z n^{+ 2} (aq) + 2 e^{-}, E^{0} = 0.76 V$ and $A g (s) \to A g^{+} (aq) + e^{-}, E^{0} = - 0.80 V$ . Which of the following reaction actually takes place?

Discussion

5831.	The ratio of e/m for cathode rays
Answer» The ratio of e/m for cathode rays

Discussion

5832.	Question 10 Identify the Mg2+ ion from the figure where, n and p represent the number of neutrons and protons respectively.
Answer» Question 10 Identify the $M g^{2 +}$ ion from the figure where, n and p represent the number of neutrons and protons respectively.

Discussion

5833.	Which of the following compounds have the same ratio of sulphur to oxygen atoms?
Answer» Which of the following compounds have the same ratio of sulphur to oxygen atoms?

Discussion

5834.	Natural rubber is a polymer obtained from
Answer» Natural rubber is a polymer obtained from

Discussion

5835.	(a) Write the chemical formula of Aluminium Sulphate?(b) Give examples for diatomic and triatomic molecules?
Answer» (a) Write the chemical formula of Aluminium Sulphate? (b) Give examples for diatomic and triatomic molecules?

5835.

(a) Write the chemical formula of Aluminium Sulphate?(b) Give examples for diatomic and triatomic molecules?

Answer»

(a) Write the chemical formula of Aluminium Sulphate?

(b) Give examples for diatomic and triatomic molecules?

Discussion

5836.	Question 25 Write down the electron distribution of chlorine atom. How many electrons are there in the L shell?
Answer» Question 25 Write down the electron distribution of chlorine atom. How many electrons are there in the L shell?

Discussion

5837.	25 Nylon6 is condensation or addition polymer and is a polyamide or not
Answer» 25 Nylon6 is condensation or addition polymer and is a polyamide or not

Discussion

5838.	Match the following (i) Sodiuma.22+(ii) Aluminiumb.3+Bariumc.1+d.4+
Answer» Match the following $\begin{matrix} (i) Sodium & a . 2^{2 +} (ii) Aluminium & b {.3}^{+} Barium & c . 1^{+} d . 4^{+} \end{matrix}$

5838.

Match the following (i) Sodiuma.22+(ii) Aluminiumb.3+Bariumc.1+d.4+

Answer»

Match the following

$\begin{matrix} (i) Sodium & a . 2^{2 +} (ii) Aluminium & b {.3}^{+} Barium & c . 1^{+} d . 4^{+} \end{matrix}$

Discussion

5839.	Why is addition of electronegative element is called oxidation.
Answer» Why is addition of electronegative element is called oxidation.

Discussion

5840.	Which state of matter is in acetone when the temperature of acetone is 293K ?
Answer» Which state of matter is in acetone when the temperature of acetone is 293K ?

Discussion

5841.	What volume of ethyl alcohol and water must be mixed together to prepare 250 ml of 60% by volume of alcohol in water
Answer» What volume of ethyl alcohol and water must be mixed together to prepare 250 ml of 60% by volume of alcohol in water

Discussion

5842.	Write the harmful effectsa. Artificial dyeb. Artificial food colourc. Radioactive substancesd. Deodorant
Answer» Write the harmful effects a. Artificial dye b. Artificial food colour c. Radioactive substances d. Deodorant

Discussion

5843.	3MnO2(s)+4Al(s)→3Mn(s)+2Al2O3(s)In the above reaction, the oxidising agent is:
Answer» $3 {MnO}_{2} (s) + 4 Al (s) \to 3 Mn (s) + 2 {Al}_{2} O_{3} (s)$ In the above reaction, the oxidising agent is:

Discussion

5844.	Which of the following is a mixture ? Salt, Air, Water, Alum, Sugar
Answer» Which of the following is a mixture ? Salt, Air, Water, Alum, Sugar

5844.

Which of the following is a mixture ? Salt, Air, Water, Alum, Sugar

Answer»

Which of the following is a mixture ?

Salt, Air, Water, Alum, Sugar

Discussion

5845.	The valencies of magnesium and oxygen respectively are:
Answer» The valencies of magnesium and oxygen respectively are:

Discussion

5846.	Give an example of something that is not matter and why
Answer» Give an example of something that is not matter and why

Discussion

5847.	Give the values for the latent heat of vaporization and latent heat of fusion of water?
Answer» Give the values for the latent heat of vaporization and latent heat of fusion of water?

Discussion

5848.	Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (a) Ammonia(b) Carbon monoxide(c) Hydrogen chloride(d) Aluminium fluoride
Answer» Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (a) Ammonia (b) Carbon monoxide (c) Hydrogen chloride (d) Aluminium fluoride

5848.

Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (a) Ammonia(b) Carbon monoxide(c) Hydrogen chloride(d) Aluminium fluoride

Answer»

Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them.

(a) Ammonia

(b) Carbon monoxide

(c) Hydrogen chloride

(d) Aluminium fluoride

Discussion

5849.	A cylinder of cross section area A has two pistons of negligible mass separated by distance l loaded with spring of negligible mass. An ideal gas at temperature T1 is in the cylinder when the springs are relaxed. When the gas is heated by some means, its temperature becomes T2 and the springs get compressed by l/2 each. If P0 is atmospheric pressure and spring constant k=2P0Al, then the ratio of T2 and T1 is
Answer» A cylinder of cross section area $A$ has two pistons of negligible mass separated by distance $l$ loaded with spring of negligible mass. An ideal gas at temperature $T_{1}$ is in the cylinder when the springs are relaxed. When the gas is heated by some means, its temperature becomes $T_{2}$ and the springs get compressed by $l / 2$ each. If $P_{0}$ is atmospheric pressure and spring constant $k = \frac{2 P_{0} A}{l}$ , then the ratio of $T_{2}$ and $T_{1}$ is

Discussion

5850.	The carbonate of a metal is isomorphous with MgCO3 and contains 6.091% of carbon. Atomic weight of the metal is nearly
Answer» The carbonate of a metal is isomorphous with MgCO3 and contains 6.091% of carbon. Atomic weight of the metal is nearly

Discussion

Explore topic-wise InterviewSolutions in .

1. An organic compound contains carbon, hydrogen, and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67. The empirical formula of the compound would be.

What do you understand by hydrolysis? Explain giving examples.

0.5g of Ba(OH)2 , 0.01 mol Ba(OH)2 and 0.01 eq. Ba(OH)2 were together diluted to one litre. Calculate the normality of basic solution.

The energy gap of silicon is 1.14 eV .The maximum wavelength ( in Angstrom) at which silicon will begin absorbing energy is ( Take hc=12400 eV−A∘)

24.While representing NaCl ionic bond through lewis dot structure, why only the octet of Cl is represented by dots and Na atom's octet is not represented?

What is the ratio of masses of proton to the masses of electron?

What are the no. of moles of atoms in 4.32 g of c(NO3)3? (At. mass :Sc=45.0;O=16;N=14.01)

40. If Cu2 positive/Cu electrode is diluted 100 times then change in emf is give me solution

what is the pressure cooker mechanism ?bp increas or decreasevp increase or decreaseexplain

what are the soft metals?

What are the types of carbon compounds? Explain each with suitable examples.

Sodium metals are stored in

Question 3 (a) Give reasons A gas fills completely the vessel in which it is kept.

How fluorine shows +1 oxidation state in HOF

The temperature at which a solid changes into liquid at atmospheric pressure is called :

The dyes present in fountain pen ink can be separated by the technique of : (a) fractional distillation (b) infrared photography (c) crystallisation (d) chromatography

Which of the following compounds is DDT?

How to find sigma and π bond in the molecules.explain in brief

What is the pH of 0.00000001M HCl aqueous solution?

Question 4What is a covalent bond? Classify the types of covalent bonds.

How does fishes and aquatic animals survive when the pond gets covered with thick ice ?

why collision theory satisfactorily explains only bimolecular reactions why not reactions of 1st ,2nd or any other order ?

At what temperature in ∘C will the volume of gas which is originally at 1∘C will double itself at constant pressure.

A U-tube is partially filled with water. An immiscible oil having density 0.8g/cc is poured into one side until water rises by 25 cm on the other side. the level of oil will s†an d higher than the water level by

Give equation to express the reaction between : (a) steam and red hot iron (b) calcium and water

tell the strong and weak acids and also strong and weak bases

Which of the following reaction involved in extraction of copper from chalcopyrite?

At 25 ∘C, the standard oxidation potentials of Zn and Ag in water are:Zn(s)→Zn+2(aq)+2e−, E0=0.76 Vand Ag(s)→Ag+(aq)+e−, E0=−0.80 V.Which of the following reaction actually takes place?

The ratio of e/m for cathode rays

Question 10 Identify the Mg2+ ion from the figure where, n and p represent the number of neutrons and protons respectively.

Which of the following compounds have the same ratio of sulphur to oxygen atoms?

Natural rubber is a polymer obtained from

(a) Write the chemical formula of Aluminium Sulphate?(b) Give examples for diatomic and triatomic molecules?

Question 25 Write down the electron distribution of chlorine atom. How many electrons are there in the L shell?

25 Nylon6 is condensation or addition polymer and is a polyamide or not

Match the following (i) Sodiuma.22+(ii) Aluminiumb.3+Bariumc.1+d.4+

Why is addition of electronegative element is called oxidation.

Which state of matter is in acetone when the temperature of acetone is 293K ?

What volume of ethyl alcohol and water must be mixed together to prepare 250 ml of 60% by volume of alcohol in water

Write the harmful effectsa. Artificial dyeb. Artificial food colourc. Radioactive substancesd. Deodorant

3MnO2(s)+4Al(s)→3Mn(s)+2Al2O3(s)In the above reaction, the oxidising agent is:

Which of the following is a mixture ? Salt, Air, Water, Alum, Sugar

The valencies of magnesium and oxygen respectively are:

Give an example of something that is not matter and why

Give the values for the latent heat of vaporization and latent heat of fusion of water?

Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (a) Ammonia(b) Carbon monoxide(c) Hydrogen chloride(d) Aluminium fluoride

The carbonate of a metal is isomorphous with MgCO3 and contains 6.091% of carbon. Atomic weight of the metal is nearly