15280 + Interview Questions in Chemistry Page 25 InterviewSolution

1201.	What happens when a few drops of dilute hydrochloric acid are added to silver nitrate solution.
Answer» What happens when a few drops of dilute hydrochloric acid are added to silver nitrate solution.

Discussion

1202.	47. Graphical represtation of endothermic reaction
Answer» 47. Graphical represtation of endothermic reaction

Discussion

1203.	Which of the following are favourable for the rate determing step for the ndustrial preparation of sulphuric acid (contact process)?
Answer» Which of the following are favourable for the rate determing step for the ndustrial preparation of sulphuric acid (contact process)?

Discussion

1204.	Explain the process of carbonisation and how coal is formed? [5 MARKS]
Answer» Explain the process of carbonisation and how coal is formed? [5 MARKS]

Discussion

1205.	A solid AB has rock salt structure. If the edge lenght is 520 pm and radius of A+ is 80 pm, the radius of anion B− would be -
Answer» A solid $A B$ has rock salt structure. If the edge lenght is $520 p m$ and radius of $A^{+}$ is $80 p m$ , the radius of anion $B^{-}$ would be -

Discussion

1206.	10 ml of gaseous hydrocarbon on combustion gives 90 ml of mixture of gases. When the mixture was passed through KOH solution, the volume reduced to 50 ml. When the remaining mixture was condensed, the volume reduced to 10 ml. Find the molecular formula.
Answer» 10 ml of gaseous hydrocarbon on combustion gives 90 ml of mixture of gases. When the mixture was passed through KOH solution, the volume reduced to 50 ml. When the remaining mixture was condensed, the volume reduced to 10 ml. Find the molecular formula.

Discussion

1207.	A copper plate was dipped inAgNO3 solution. After a certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.
Answer» A copper plate was dipped in $A g N O_{3}$ solution. After a certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.

Discussion

1208.	what is galvanisation and give examples
Answer» what is galvanisation and give examples

Discussion

1209.	What is radius for an ion to occupy tetrahedral site
Answer» What is radius for an ion to occupy tetrahedral site

Discussion

1210.	24.In a flask colourless N2O4 is in equilibrium with brown coloured NO2. At equilibrium when the flask is heated at 100^° , the brown colour deepens and on cooling it becomes less coloured. The change in enthalpy, Δ H for formation of NO2 is
Answer» 24.In a flask colourless N2O4 is in equilibrium with brown coloured NO2. At equilibrium when the flask is heated at 100^° , the brown colour deepens and on cooling it becomes less coloured. The change in enthalpy, Δ H for formation of NO2 is

Discussion

1211.	78.Does more polarity in C-X bond always imply less bond length?
Answer» 78.Does more polarity in C-X bond always imply less bond length?

Discussion

1212.	An organic compound which is used in the silk industry and has molecular formula C2H4O2 and gives an ester compound on reaction with ethanol. The compound is
Answer» An organic compound which is used in the silk industry and has molecular formula $C_{2} H_{4} O_{2}$ and gives an ester compound on reaction with ethanol. The compound is

Discussion

1213.	(a) What type of chemical bond is present in the chlorine molecule? Explain your answer. (b) Explain the formation of a chlorine molecule on the basis of the electronic theory of valency.
Answer» (a) What type of chemical bond is present in the chlorine molecule? Explain your answer. (b) Explain the formation of a chlorine molecule on the basis of the electronic theory of valency.

Discussion

1214.	2.Suppose the elements X and Y combine to form two compound XY2 and X3Y2.when 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9g,the atomic weights of X and Y are
Answer» 2.Suppose the elements X and Y combine to form two compound XY2 and X3Y2.when 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9g,the atomic weights of X and Y are

Discussion

1215.	25 C6h6 + o2 --> co2 + h2o, how to balance this redox reaction, using oxidation number method ?
Answer» 25 C6h6 + o2 --> co2 + h2o, how to balance this redox reaction, using oxidation number method ?

Discussion

1216.	Match the following:Petroleum ProductsUses1. Petrola.Paints and road surfacing2. Paraffin waxb.Fuel for lamps3. Kerosenec.Candles 4. LPGd.Fuel for vehicles5. Bitumene.Cooking cylinder
Answer» Match the following: $\begin{matrix} P e t r o l e u m P r o d u c t s & U s e s 1. P e t r o l & a . P a i n t s a n d r o a d s u r f a c i n g 2. P a r a f f i n w a x & b . F u e l f o r l a m p s 3. K e r o s e n e & c . C a n d l e s 4. L P G & d . F u e l f o r v e h i c l e s 5. B i t u m e n & e . C o o k i n g c y l i n d e r \end{matrix}$

Discussion

1217.	20. In the reaction 4A+2B+3C-->A4B2C3.the no of moles of products formed will be___. If starting from 2 moles of A, 1.2moles of B and 1.44 moles of C
Answer» 20. In the reaction 4A+2B+3C-->A4B2C3.the no of moles of products formed will be___. If starting from 2 moles of A, 1.2moles of B and 1.44 moles of C

Discussion

1218.	25 Explain the formation of alkene from R-OH alcohol by E1-cb method.
Answer» 25 Explain the formation of alkene from R-OH alcohol by E1-cb method.

Discussion

1219.	What is the term used for a form of carbon which helps in absorbing unpleasant smell from drinking water and refrigerators?
Answer» What is the term used for a form of carbon which helps in absorbing unpleasant smell from drinking water and refrigerators?

Discussion

1220.	3. regular use of which of the following fertiliser increases the acidity of the soil? 1. potassium nitrate 2. superphosphate of lime 3. urea 4. ammonium sulfate
Answer» 3. regular use of which of the following fertiliser increases the acidity of the soil? 1. potassium nitrate 2. superphosphate of lime 3. urea 4. ammonium sulfate

Discussion

1221.	40. List differences between reversible and irreversible process.
Answer» 40. List differences between reversible and irreversible process.

Discussion

1222.	Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not. Give reasons.
Answer» Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not. Give reasons.

Discussion

1223.	Why is pine oil used in froath floatation? Give reason
Answer» Why is pine oil used in froath floatation? Give reason

Discussion

1224.	Acids when dissolved in water produce:
Answer» Acids when dissolved in water produce:

Discussion

1225.	If a small amount of baking soda is added to water. Then water becomes:
Answer» If a small amount of baking soda is added to water. Then water becomes:

Discussion

1226.	Define the following terms.Malleability and Ductility.
Answer» Define the following terms. Malleability and Ductility.

1226.

Define the following terms.Malleability and Ductility.

Answer»

Define the following terms.

Malleability and Ductility.

Discussion

1227.	is MgH2 an ionic hydride or interstitial hydride
Answer» is MgH2 an ionic hydride or interstitial hydride

Discussion

1228.	Write word equation and balanced chemical equation for the reaction taking place when dilute sulphuric acid reacts with aluminium powder.
Answer» Write word equation and balanced chemical equation for the reaction taking place when dilute sulphuric acid reacts with aluminium powder.

Discussion

1229.	Maximum number of spectral lines emitted when electrons jump from n=5 to n=1 in hydrogen atom sample is1) 3s2) 2p3) 2s4) 1s
Answer» Maximum number of spectral lines emitted when electrons jump from n=5 to n=1 in hydrogen atom sample is 1) 3s 2) 2p 3) 2s 4) 1s

Discussion

1230.	What is the Le chatelier's principle?
Answer» What is the Le chatelier's principle?

Discussion

1231.	The hydrocarbon 2-methyl butane is an isomer of : (a) n-pentane (b) n-butane (c) propane (d) iso-butane
Answer» The hydrocarbon 2-methyl butane is an isomer of : (a) n-pentane (b) n-butane (c) propane (d) iso-butane

Discussion

1232.	Give the equation for the reaction of NaCN with ZnS and PbS for froth flotation method of concentration
Answer» Give the equation for the reaction of NaCN with ZnS and PbS for froth flotation method of concentration

Discussion

1233.	If both A and R is true and R is correct explanation of A mark 1.If both A and R is true but R is not correct explanation of A mark 2.If A is true but R is false mark 3.If R is true but A is false mark 4.A: Nitrogen is a non metal.R:Nitrogen has 5 valence electrons.
Answer» If both A and R is true and R is correct explanation of A mark 1. If both A and R is true but R is not correct explanation of A mark 2. If A is true but R is false mark 3. If R is true but A is false mark 4. A: Nitrogen is a non metal. R:Nitrogen has 5 valence electrons.

Discussion

1234.	The pH of gastric juices released during digestion is:
Answer» The pH of gastric juices released during digestion is:

Discussion

1235.	What are electro negativity and electron affinity? Please explain in detail
Answer» What are electro negativity and electron affinity? Please explain in detail

Discussion

1236.	What are the different stages in the formation of coal? How does the moisture and carbon content in these stages of formation vary?
Answer» What are the different stages in the formation of coal? How does the moisture and carbon content in these stages of formation vary?

Discussion

1237.	Write an equation to illustrate the reducing nature of ammonia.
Answer» Write an equation to illustrate the reducing nature of ammonia.

Discussion

1238.	1. State three physical properties of carbon compound 2. Carbon is versatile element. Justify this statement
Answer» 1. State three physical properties of carbon compound 2. Carbon is versatile element. Justify this statement

Discussion

1239.	Chlorophyll contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 2 gram of chlorophyll
Answer» Chlorophyll contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 2 gram of chlorophyll

Discussion

1240.	Which of following have maximum covalent character : a)AgCl,TlCl3
Answer» Which of following have maximum covalent character : a)AgCl,TlCl3

Discussion

1241.	The conversion of butene to butane in presence of nickel is an example of:
Answer» The conversion of butene to butane in presence of nickel is an example of:

Discussion

1242.	Who are my companions ?Group 'A' Group 'B' 1. Stainless steel (a) Non-metal2. Silver (b) compound 3. Bhajini mixture (c) Mixture for milling4. Salt (d) Element 5. Coal (e) Alloy6. Hydrogen (f) Metal
Answer» Who are my companions ? Group 'A' Group 'B' 1. Stainless steel (a) Non-metal 2. Silver (b) compound 3. Bhajini mixture (c) Mixture for milling 4. Salt (d) Element 5. Coal (e) Alloy 6. Hydrogen (f) Metal

Discussion

1243.	Electronic configuration of an element is 1s2 2s2 2p6 3s2 3p6 3d5 4s1. Total number of electrons present in M shell of this element is:
Answer» Electronic configuration of an element is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{1}$ . Total number of electrons present in M shell of this element is:

Discussion

1244.	0.01 moles of a weak acid HA(Ka=2.0×10−6) is dissolved in 1.0 L of 0.1 M HCl solution. The degree of dissociation of HA is _______×10−5 (Round off to the Nearest Integer). Assume degree of dissociation
Answer» 0.01 moles of a weak acid HA( $K_{a} = 2.0 \times 10^{- 6}$ ) is dissolved in $1.0 L$ of $0.1 M H C l$ solution. The degree of dissociation of HA is _______ $\times 10^{- 5}$ (Round off to the Nearest Integer). Assume degree of dissociation << 1.

Discussion

1245.	when the size of cation decreases why the covalent character increases?
Answer» when the size of cation decreases why the covalent character increases?

Discussion

1246.	If 1/temperature decreases and volume raises what is the graph according to Charle's law and if the pressure decreases volume increases what is the graph according to Boyle's law
Answer» If 1/temperature decreases and volume raises what is the graph according to Charle's law and if the pressure decreases volume increases what is the graph according to Boyle's law

Discussion

1247.	27. A 0.1M basic solution is required from ca(OH)2 which is 40% ionized. Analytical molarity ofCa(OH)2 should be?
Answer» 27. A 0.1M basic solution is required from ca(OH)2 which is 40% ionized. Analytical molarity ofCa(OH)2 should be?

Discussion

1248.	Why Copper doesn't react with Hydrochloric Acid ( HCl
Answer» Why Copper doesn't react with Hydrochloric Acid ( HCl

Discussion

1249.	(a) Write the equation for:(i) the preparation of hydrogen chloride from sodium chloride and sulphuric acid. State whether the sulphuric acid should be concentrated or dilute.(ii) the preparation of ammonia from ammonium chloride and calcium hydroxide.(iii) the reaction of hydrogen chloride with ammonia.
Answer» (a) Write the equation for: (i) the preparation of hydrogen chloride from sodium chloride and sulphuric acid. State whether the sulphuric acid should be concentrated or dilute. (ii) the preparation of ammonia from ammonium chloride and calcium hydroxide. (iii) the reaction of hydrogen chloride with ammonia.

Discussion

1250.	Borax Bead Test is given by ___.
Answer» Borax Bead Test is given by ___.

Discussion

Explore topic-wise InterviewSolutions in .

What happens when a few drops of dilute hydrochloric acid are added to silver nitrate solution.

47. Graphical represtation of endothermic reaction

Which of the following are favourable for the rate determing step for the ndustrial preparation of sulphuric acid (contact process)?

Explain the process of carbonisation and how coal is formed? [5 MARKS]

A solid AB has rock salt structure. If the edge lenght is 520 pm and radius of A+ is 80 pm, the radius of anion B− would be -

10 ml of gaseous hydrocarbon on combustion gives 90 ml of mixture of gases. When the mixture was passed through KOH solution, the volume reduced to 50 ml. When the remaining mixture was condensed, the volume reduced to 10 ml. Find the molecular formula.

A copper plate was dipped inAgNO3 solution. After a certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.

what is galvanisation and give examples

What is radius for an ion to occupy tetrahedral site

24.In a flask colourless N2O4 is in equilibrium with brown coloured NO2. At equilibrium when the flask is heated at 100^° , the brown colour deepens and on cooling it becomes less coloured. The change in enthalpy, Δ H for formation of NO2 is

78.Does more polarity in C-X bond always imply less bond length?

An organic compound which is used in the silk industry and has molecular formula C2H4O2 and gives an ester compound on reaction with ethanol. The compound is

(a) What type of chemical bond is present in the chlorine molecule? Explain your answer. (b) Explain the formation of a chlorine molecule on the basis of the electronic theory of valency.

2.Suppose the elements X and Y combine to form two compound XY2 and X3Y2.when 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9g,the atomic weights of X and Y are

25 C6h6 + o2 --> co2 + h2o, how to balance this redox reaction, using oxidation number method ?

Match the following:Petroleum ProductsUses1. Petrola.Paints and road surfacing2. Paraffin waxb.Fuel for lamps3. Kerosenec.Candles 4. LPGd.Fuel for vehicles5. Bitumene.Cooking cylinder

20. In the reaction 4A+2B+3C-->A4B2C3.the no of moles of products formed will be___. If starting from 2 moles of A, 1.2moles of B and 1.44 moles of C

25 Explain the formation of alkene from R-OH alcohol by E1-cb method.

What is the term used for a form of carbon which helps in absorbing unpleasant smell from drinking water and refrigerators?

3. regular use of which of the following fertiliser increases the acidity of the soil? 1. potassium nitrate 2. superphosphate of lime 3. urea 4. ammonium sulfate

40. List differences between reversible and irreversible process.

Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not. Give reasons.

Why is pine oil used in froath floatation? Give reason

Acids when dissolved in water produce:

If a small amount of baking soda is added to water. Then water becomes:

Define the following terms.Malleability and Ductility.

is MgH2 an ionic hydride or interstitial hydride

Write word equation and balanced chemical equation for the reaction taking place when dilute sulphuric acid reacts with aluminium powder.

Maximum number of spectral lines emitted when electrons jump from n=5 to n=1 in hydrogen atom sample is1) 3s2) 2p3) 2s4) 1s

What is the Le chatelier's principle?

The hydrocarbon 2-methyl butane is an isomer of : (a) n-pentane (b) n-butane (c) propane (d) iso-butane

Give the equation for the reaction of NaCN with ZnS and PbS for froth flotation method of concentration

If both A and R is true and R is correct explanation of A mark 1.If both A and R is true but R is not correct explanation of A mark 2.If A is true but R is false mark 3.If R is true but A is false mark 4.A: Nitrogen is a non metal.R:Nitrogen has 5 valence electrons.

The pH of gastric juices released during digestion is:

What are electro negativity and electron affinity? Please explain in detail

What are the different stages in the formation of coal? How does the moisture and carbon content in these stages of formation vary?

Write an equation to illustrate the reducing nature of ammonia.

1. State three physical properties of carbon compound 2. Carbon is versatile element. Justify this statement

Chlorophyll contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 2 gram of chlorophyll

Which of following have maximum covalent character : a)AgCl,TlCl3

The conversion of butene to butane in presence of nickel is an example of:

Who are my companions ?Group 'A' Group 'B' 1. Stainless steel (a) Non-metal2. Silver (b) compound 3. Bhajini​ mixture (c) Mixture for milling4. Salt (d) Element 5. Coal (e) Alloy6. Hydrogen (f) Metal

Electronic configuration of an element is 1s2 2s2 2p6 3s2 3p6 3d5 4s1. Total number of electrons present in M shell of this element is:

0.01 moles of a weak acid HA(Ka=2.0×10−6) is dissolved in 1.0 L of 0.1 M HCl solution. The degree of dissociation of HA is _______×10−5 (Round off to the Nearest Integer). Assume degree of dissociation

when the size of cation decreases why the covalent character increases?

If 1/temperature decreases and volume raises what is the graph according to Charle's law and if the pressure decreases volume increases what is the graph according to Boyle's law

27. A 0.1M basic solution is required from ca(OH)2 which is 40% ionized. Analytical molarity ofCa(OH)2 should be?

Why Copper doesn't react with Hydrochloric Acid ( HCl

Borax Bead Test is given by ___.

Who are my companions ?Group 'A' Group 'B' 1. Stainless steel (a) Non-metal2. Silver (b) compound 3. Bhajini mixture (c) Mixture for milling4. Salt (d) Element 5. Coal (e) Alloy6. Hydrogen (f) Metal