15280 + Interview Questions in Chemistry Page 187 InterviewSolution

9301.	Write the products of the reaction given below.CH3COOH(aq)+NaOH(aq)→
Answer» Write the products of the reaction given below. $C H_{3} C O O H (a q) + N a O H (a q) \to$

Discussion

9302.	18.Explain how entropy of universe and system gets affected in following processes A)rusting of iron B)crystallization of source from solution
Answer» 18.Explain how entropy of universe and system gets affected in following processes A)rusting of iron B)crystallization of source from solution

Discussion

9303.	State the change noticed when blue litmus and red litmus are introduced in the following solution (a) Na_2CO_3 solution (b) NaCl solution (c) NH4NO3 (d) MgCl2 solution
Answer» State the change noticed when blue litmus and red litmus are introduced in the following solution (a) Na_2CO_3 solution (b) NaCl solution (c) $N H_{4} N O_{3}$ (d) $M g C l_{2}$ solution

9303.

State the change noticed when blue litmus and red litmus are introduced in the following solution (a) Na_2CO_3 solution (b) NaCl solution (c) NH4NO3 (d) MgCl2 solution

Answer»

State the change noticed when blue litmus and red litmus are introduced in the following solution

(a) Na_2CO_3 solution (b) NaCl solution

(c) $N H_{4} N O_{3}$ (d) $M g C l_{2}$ solution

Discussion

9304.	(a) Define a homologous series. Give the name and structural formula of one homologue of the following : CH3OH (b) Write the molecular formula of the third member of the homologous series of carbon compounds with general formula CnH2n+1OH. (c) Name any two fossil fuels.
Answer» (a) Define a homologous series. Give the name and structural formula of one homologue of the following : $C H_{3} O H$ (b) Write the molecular formula of the third member of the homologous series of carbon compounds with general formula $C_{n} H_{2 n + 1} O H .$ (c) Name any two fossil fuels.

Discussion

9305.	What information does the following chemical equations convey ? (a) Zn + H2SO4 → ZnSO4 + H2 (b) Mg + 2HCl → MgCl2 + H2
Answer» What information does the following chemical equations convey ? (a) $Z n$ + $H_{2} S O_{4}$ $\to$ $Z n S O_{4}$ + $H_{2}$ (b) $M g$ + $2 H C l$ $\to$ $M g C l_{2}$ + $H_{2}$

9305.

What information does the following chemical equations convey ? (a) Zn + H2SO4 → ZnSO4 + H2 (b) Mg + 2HCl → MgCl2 + H2

Answer»

What information does the following chemical equations convey ?

(a) $Z n$ + $H_{2} S O_{4}$ $\to$ $Z n S O_{4}$ + $H_{2}$

(b) $M g$ + $2 H C l$ $\to$ $M g C l_{2}$ + $H_{2}$

Discussion

9306.	When wood is burnt in limited supply of oxygen, which of them is left behind as a residue?
Answer» When wood is burnt in limited supply of oxygen, which of them is left behind as a residue?

Discussion

9307.	Write a short note on anodizing. (1m)
Answer» Write a short note on anodizing. (1m)

Discussion

9308.	How do we classify elements?(please give a proper answer that can be written in a board paper)
Answer» How do we classify elements?(please give a proper answer that can be written in a board paper)

Discussion

9309.	A chemical change cannot be normally reversed. Why?
Answer» A chemical change cannot be normally reversed. Why?

Discussion

9310.	What is the probability of getting at least ine six in a single throw of three unbiased dice?
Answer» What is the probability of getting at least ine six in a single throw of three unbiased dice?

Discussion

9311.	A student perpared solution of a acids and a base in two separate breakers she forgot to label the solution and litmus paper is not available in the lab , since both the solution are colours less how will she distinguish the two
Answer» A student perpared solution of a acids and a base in two separate breakers she forgot to label the solution and litmus paper is not available in the lab , since both the solution are colours less how will she distinguish the two

Discussion

9312.	Choose the correct set of statement/s among the following: A. Formaldehyde in presence of Conc NaOH gives methanol. B. Mesityl oxide has a functional group of ‘CHO’. C. Acetone hydrazine on treatment with KOH / CH2OH – CH2OH gives propane. D. Acetone has more boiling point than of acetaldehyde.
Answer» Choose the correct set of statement/s among the following: A. Formaldehyde in presence of Conc NaOH gives methanol. B. Mesityl oxide has a functional group of ‘CHO’. C. Acetone hydrazine on treatment with KOH / CH2OH – CH2OH gives propane. D. Acetone has more boiling point than of acetaldehyde.

Discussion

9313.	What is electropositivity? what do you think will happen if a highly electropositive element bonded to another element of high electronegativity?
Answer» What is electropositivity? what do you think will happen if a highly electropositive element bonded to another element of high electronegativity?

Discussion

9314.	Iron does not burn on heating but iron fillings burn vigorously when sprinkled on the flame of the burner. Why does this happen ? Give reasons.
Answer» Iron does not burn on heating but iron fillings burn vigorously when sprinkled on the flame of the burner. Why does this happen ? Give reasons.

Discussion

9315.	On warming with potassium nitrite, dilute hydrochloric acid gives _____.
Answer» On warming with potassium nitrite, dilute hydrochloric acid gives _____.

Discussion

9316.	Which of the following gas is released when ammonium nitrate is heated?
Answer» Which of the following gas is released when ammonium nitrate is heated?

Discussion

9317.	Hydrogen is a metal or nonmetal
Answer» Hydrogen is a metal or nonmetal

Discussion

9318.	Why is soap slippery? Is it basic in nature
Answer» Why is soap slippery? Is it basic in nature

Discussion

9319.	What is quantum mechanics?
Answer» What is quantum mechanics?

Discussion

9320.	Gay Lussac's law states that:
Answer» Gay Lussac's law states that:

Discussion

9321.	Dilution is the process of decreasing the concentration of a ___ in a solution, usually by mixing more solvent.
Answer» Dilution is the process of decreasing the concentration of a ___ in a solution, usually by mixing more solvent.

Discussion

9322.	What happens when a ray fo white light passes through a glass prism?
Answer» What happens when a ray fo white light passes through a glass prism?

Discussion

9323.	Write three differences between graphite and diamond.
Answer» Write three differences between graphite and diamond.

Discussion

9324.	Question 16 If copper is kept in open air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of (a) CuSO4 (b) CuCO3 (c) Cu(NO3)2 (d) CuO
Answer» Question 16 If copper is kept in open air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of (a) ${CuSO}_{4}$ (b) ${CuCO}_{3}$ (c) ${Cu(NO}_{3})_{2}$ (d) $CuO$

Discussion

9325.	Are barium chloride and ammonia water soluble?
Answer» Are barium chloride and ammonia water soluble?

Discussion

9326.	Explain about the plaster of Paris and useful of it and also give examples
Answer» Explain about the plaster of Paris and useful of it and also give examples

Discussion

9327.	Which of the following is correct regarding ionic compound?
Answer» Which of the following is correct regarding ionic compound?

Discussion

9328.	Define basic anhydride.
Answer» Define basic anhydride.

Discussion

9329.	(a) What happens when ethanoic acid reacts with sodium hydroxide? Write the equation of the reaction involved. (b) What happens when vegetable oils are hydrogenated? Name the catalyst used. (c) What is the advantage of detergents over soaps for washing clothes? Also, state one disadvantage.
Answer» (a) What happens when ethanoic acid reacts with sodium hydroxide? Write the equation of the reaction involved. (b) What happens when vegetable oils are hydrogenated? Name the catalyst used. (c) What is the advantage of detergents over soaps for washing clothes? Also, state one disadvantage.

Discussion

9330.	When you add about 2 ml of acetic acid to a test tube containing an equal amount of distilled water and leave the test tube to settle shaking its contents, what will you observe in the test tube after about 5 minutes?
Answer» When you add about 2 ml of acetic acid to a test tube containing an equal amount of distilled water and leave the test tube to settle shaking its contents, what will you observe in the test tube after about 5 minutes?

Discussion

9331.	Hydrogen chloride gas on dissolving in water produces:
Answer» Hydrogen chloride gas on dissolving in water produces:

Discussion

9332.	Select the most appropriate option related to the process of refining of petroleum.
Answer» Select the most appropriate option related to the process of refining of petroleum.

Discussion

9333.	Base + X → Salt + H2O Find X.
Answer» Base + X $\to$ Salt + $H_{2} O$ Find X.

9333.

Base + X → Salt + H2O Find X.

Answer»

Base + X $\to$ Salt + $H_{2} O$

Find X.

Discussion

9334.	Volume of 4.4g of CO2 at STP is
Answer» Volume of 4.4g of $C O_{2}$ at STP is

Discussion

9335.	A compound X is highly poisonous and is used in the manufacturing of varnish and formalin. Identify X.
Answer» A compound X is highly poisonous and is used in the manufacturing of varnish and formalin. Identify X.

Discussion

9336.	What change in colour is observed when white silver chloride is left exposed to sunlight state the type of chemical reaction in this change
Answer» What change in colour is observed when white silver chloride is left exposed to sunlight state the type of chemical reaction in this change

Discussion

9337.	What are endothermic reactions ?
Answer» What are endothermic reactions ?

Discussion

9338.	(a) Why is high temperature avoided in the preparation of hydrogen chloride from sodium sulphate and concentrated sulphuric acid? (b) Sodium chloride is preferred for the preparation of HCI. Why? [2 MARKS]
Answer» (a) Why is high temperature avoided in the preparation of hydrogen chloride from sodium sulphate and concentrated sulphuric acid? (b) Sodium chloride is preferred for the preparation of HCI. Why? [2 MARKS]

Discussion

9339.	Amorphous silicon is a ___ coloured powder.
Answer» Amorphous silicon is a ___ coloured powder.

Discussion

9340.	How does the method used for extracting a metal from its ore depend on the metal's position in the reactivity series ? Explain with examples.
Answer» How does the method used for extracting a metal from its ore depend on the metal's position in the reactivity series ? Explain with examples.

Discussion

9341.	Write the electron-dot structures for : (i) ethane, (ii) ethene, and (iii) ethyne.
Answer» Write the electron-dot structures for : (i) ethane, (ii) ethene, and (iii) ethyne.

Discussion

9342.	Write the common name, IUPAC name and formula of one monocarboxylic acid and one dicarboxylic acid.
Answer» Write the common name, IUPAC name and formula of one monocarboxylic acid and one dicarboxylic acid.

Discussion

9343.	In a compound of magnesium (Mg = 24) and nitrogen (N= 14 ), 18 g of magnesium combines with 7 g of nitrogen. Deduce the simplest formula by answering the following questions: (a) how many gram atoms of magnesium are equal to 18 g? (b) how many grams atoms of nitrogen equal to 7 g of nitrogen? (c) calculate simple ratio of gram atoms of magnesium to gram atoms of nitrogen and hence the simplest formula of the compound formed.
Answer» In a compound of magnesium (Mg = 24) and nitrogen (N= 14 ), 18 g of magnesium combines with 7 g of nitrogen. Deduce the simplest formula by answering the following questions: (a) how many gram atoms of magnesium are equal to 18 g? (b) how many grams atoms of nitrogen equal to 7 g of nitrogen? (c) calculate simple ratio of gram atoms of magnesium to gram atoms of nitrogen and hence the simplest formula of the compound formed.

Discussion

9344.	IUPAC name of the compound H2N−O\|\|C−CH\|CH−CH3\|CH3−C(CH3)3?
Answer» IUPAC name of the compound $H_{2} N - O \| \| C - C H \| C H - C H_{3} \| C H_{3} - C (C H_{3})_{3}$ ?

9344.

IUPAC name of the compound H2N−O||C−CH|CH−CH3|CH3−C(CH3)3?

Answer»

IUPAC name of the compound

$H_{2} N - O | | C - C H | C H - C H_{3} | C H_{3} - C (C H_{3})_{3}$ ?

Discussion

9345.	Pick up the beaker of the substance which will form an oxide and when dissolved in water forms a basic solution.
Answer» Pick up the beaker of the substance which will form an oxide and when dissolved in water forms a basic solution.

9345.

Pick up the beaker of the substance which will form an oxide and when dissolved in water forms a basic solution.

Answer»

Pick up the beaker of the substance which will form an oxide and when dissolved in water forms a basic solution.

Discussion

9346.	The vapour density of a gas is 11.2. What is the volume occupied by 10g of the gas at STP?
Answer» The vapour density of a gas is 11.2. What is the volume occupied by 10g of the gas at STP?

Discussion

9347.	A metal X forms a water soluble salt XNO3. When an aqueous solution of XNO3 is added to common salt solution, then a white precipitate fo compound Y is formed along with sodium nitrate solution. Metal X is said to be the best conductor of electricity and it does not evolve hydrogen when put in dilute hydrohloric acid. (a) What is metal X ? (b) What is salt XNO3 ? (c) Name the compound Y. (d) Write the chemical equation of the reaction which takes place on reacting XNO3 solution an common salt solution giving the physical states of all the reactants and products. (e) What type of chemical reaction is illustrated by the above equation ?
Answer» A metal X forms a water soluble salt $X N O_{3}$ . When an aqueous solution of $X N O_{3}$ is added to common salt solution, then a white precipitate fo compound Y is formed along with sodium nitrate solution. Metal X is said to be the best conductor of electricity and it does not evolve hydrogen when put in dilute hydrohloric acid. (a) What is metal X ? (b) What is salt $X N O_{3}$ ? (c) Name the compound Y. (d) Write the chemical equation of the reaction which takes place on reacting $X N O_{3}$ solution an common salt solution giving the physical states of all the reactants and products. (e) What type of chemical reaction is illustrated by the above equation ?

9347.

A metal X forms a water soluble salt XNO3. When an aqueous solution of XNO3 is added to common salt solution, then a white precipitate fo compound Y is formed along with sodium nitrate solution. Metal X is said to be the best conductor of electricity and it does not evolve hydrogen when put in dilute hydrohloric acid. (a) What is metal X ? (b) What is salt XNO3 ? (c) Name the compound Y. (d) Write the chemical equation of the reaction which takes place on reacting XNO3 solution an common salt solution giving the physical states of all the reactants and products. (e) What type of chemical reaction is illustrated by the above equation ?

Answer»

A metal X forms a water soluble salt $X N O_{3}$ . When an aqueous solution of $X N O_{3}$ is added to common salt solution, then a white precipitate fo compound Y is formed along with sodium nitrate solution. Metal X is said to be the best conductor of electricity and it does not evolve hydrogen when put in dilute hydrohloric acid.

(a) What is metal X ?

(b) What is salt $X N O_{3}$ ?

(c) Name the compound Y.

(d) Write the chemical equation of the reaction which takes place on reacting $X N O_{3}$ solution an common salt solution giving the physical states of all the reactants and products.

(e) What type of chemical reaction is illustrated by the above equation ?

Discussion

9348.	Find the percentage of oxygen in magnesium nitrate crystals, Mg(NO3)2.6H2O [Mg = 24, N = 14, O = 16, H = 1]
Answer» Find the percentage of oxygen in magnesium nitrate crystals, $M g (N O_{3})_{2} .6 H_{2} O$ [Mg = 24, N = 14, O = 16, H = 1]

Discussion

9349.	A metal less reactive and another metal more reactive than hydrogen are (a) aluminium and lead (b) iron and magnesium (c) copper and tin (d) copper and mercury
Answer» A metal less reactive and another metal more reactive than hydrogen are (a) aluminium and lead (b) iron and magnesium (c) copper and tin (d) copper and mercury

9349.

A metal less reactive and another metal more reactive than hydrogen are (a) aluminium and lead (b) iron and magnesium (c) copper and tin (d) copper and mercury

Answer»

A metal less reactive and another metal more reactive than hydrogen are
(a) aluminium and lead (b) iron and magnesium

(c) copper and tin (d) copper and mercury

Discussion

9350.	What is corrosion
Answer» What is corrosion

Discussion

Explore topic-wise InterviewSolutions in .

Write the products of the reaction given below.CH3COOH(aq)+NaOH(aq)→

18.Explain how entropy of universe and system gets affected in following processes A)rusting of iron B)crystallization of source from solution

State the change noticed when blue litmus and red litmus are introduced in the following solution (a) Na_2CO_3 solution (b) NaCl solution (c) NH4NO3 (d) MgCl2 solution

(a) Define a homologous series. Give the name and structural formula of one homologue of the following : CH3OH (b) Write the molecular formula of the third member of the homologous series of carbon compounds with general formula CnH2n+1OH. (c) Name any two fossil fuels.

What information does the following chemical equations convey ? (a) Zn + H2SO4 → ZnSO4 + H2 (b) Mg + 2HCl → MgCl2 + H2

When wood is burnt in limited supply of oxygen, which of them is left behind as a residue?

Write a short note on anodizing. (1m)

How do we classify elements?(please give a proper answer that can be written in a board paper)

A chemical change cannot be normally reversed. Why?

What is the probability of getting at least ine six in a single throw of three unbiased dice?

A student perpared solution of a acids and a base in two separate breakers she forgot to label the solution and litmus paper is not available in the lab , since both the solution are colours less how will she distinguish the two

What is electropositivity? what do you think will happen if a highly electropositive element bonded to another element of high electronegativity?

Iron does not burn on heating but iron fillings burn vigorously when sprinkled on the flame of the burner. Why does this happen ? Give reasons.

On warming with potassium nitrite, dilute hydrochloric acid gives _____.

Which of the following gas is released when ammonium nitrate is heated?

Hydrogen is a metal or nonmetal

Why is soap slippery? Is it basic in nature

What is quantum mechanics?

Gay Lussac's law states that:

Dilution is the process of decreasing the concentration of a ___ in a solution, usually by mixing more solvent.

What happens when a ray fo white light passes through a glass prism?

Write three differences between graphite and diamond.

Question 16 If copper is kept in open air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of (a) CuSO4 (b) CuCO3 (c) Cu(NO3)2 (d) CuO

Are barium chloride and ammonia water soluble?

Explain about the plaster of Paris and useful of it and also give examples

Which of the following is correct regarding ionic compound?

Define basic anhydride.

(a) What happens when ethanoic acid reacts with sodium hydroxide? Write the equation of the reaction involved. (b) What happens when vegetable oils are hydrogenated? Name the catalyst used. (c) What is the advantage of detergents over soaps for washing clothes? Also, state one disadvantage.

When you add about 2 ml of acetic acid to a test tube containing an equal amount of distilled water and leave the test tube to settle shaking its contents, what will you observe in the test tube after about 5 minutes?

Hydrogen chloride gas on dissolving in water produces:

Select the most appropriate option related to the process of refining of petroleum.

Base + X → Salt + H2O Find X.

Volume of 4.4g of CO2 at STP is

A compound X is highly poisonous and is used in the manufacturing of varnish and formalin. Identify X.

What change in colour is observed when white silver chloride is left exposed to sunlight state the type of chemical reaction in this change

What are endothermic reactions ?

(a) Why is high temperature avoided in the preparation of hydrogen chloride from sodium sulphate and concentrated sulphuric acid? (b) Sodium chloride is preferred for the preparation of HCI. Why? [2 MARKS]

Amorphous silicon is a ___ coloured powder.

How does the method used for extracting a metal from its ore depend on the metal's position in the reactivity series ? Explain with examples.

Write the electron-dot structures for : (i) ethane, (ii) ethene, and (iii) ethyne.

Write the common name, IUPAC name and formula of one monocarboxylic acid and one dicarboxylic acid.

IUPAC name of the compound H2N−O||C−CH|CH−CH3|CH3−C(CH3)3?

Pick up the beaker of the substance which will form an oxide and when dissolved in water forms a basic solution.

The vapour density of a gas is 11.2. What is the volume occupied by 10g of the gas at STP?

Find the percentage of oxygen in magnesium nitrate crystals, Mg(NO3)2.6H2O [Mg = 24, N = 14, O = 16, H = 1]

A metal less reactive and another metal more reactive than hydrogen are (a) aluminium and lead (b) iron and magnesium (c) copper and tin (d) copper and mercury

What is corrosion