15280 + Interview Questions in Chemistry Page 303 InterviewSolution

15101.	Question 09. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done ? (a) Wash the hand with saline solution (b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate (c) After washing with plenty of water apply solution of sodium hydroxide on the hand (d) Neutralise the acid with a strong alkali
Answer» Question 09. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done ? (a) Wash the hand with saline solution (b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate (c) After washing with plenty of water apply solution of sodium hydroxide on the hand (d) Neutralise the acid with a strong alkali

Discussion

15102.	Question 29 Select the mismatched pair in the following and correct it. (a) Biomagnification — Accumulation of chemicals at the successive trophic levels of a food chain (b) Ecosystem — Biotic components of the environment (c) Aquarium — A man-made ecosystem (d) Parasites — Organisms which obtain food from other living organisms
Answer» Question 29 Select the mismatched pair in the following and correct it. (a) Biomagnification — Accumulation of chemicals at the successive trophic levels of a food chain (b) Ecosystem — Biotic components of the environment (c) Aquarium — A man-made ecosystem (d) Parasites — Organisms which obtain food from other living organisms

Discussion

15103.	When and Why is there an effect of concentration of OH ions
Answer» When and Why is there an effect of concentration of OH ions

Discussion

15104.	Is" positive charge -high electric fluid and negative charge-low electric fluid " correct ?? If it is correct, then is electric current in a circuit, the movement of this electric fluid from positive terminal to negative terminal of the cell?? If this is true , then when equilibrium is reached will the current flowing in the circuit stop automatically ??
Answer» Is" positive charge -high electric fluid and negative charge-low electric fluid " correct ?? If it is correct, then is electric current in a circuit, the movement of this electric fluid from positive terminal to negative terminal of the cell?? If this is true , then when equilibrium is reached will the current flowing in the circuit stop automatically ??

15104.

Is" positive charge -high electric fluid and negative charge-low electric fluid " correct ?? If it is correct, then is electric current in a circuit, the movement of this electric fluid from positive terminal to negative terminal of the cell?? If this is true , then when equilibrium is reached will the current flowing in the circuit stop automatically ??

Answer»

Is" positive charge -high electric fluid and negative charge-low electric fluid " correct ??

If it is correct, then is electric current in a circuit, the movement of this electric fluid from positive terminal to negative terminal of the cell??

If this is true , then when equilibrium is reached will the current flowing in the circuit stop automatically ??

Discussion

15105.	Identify Arrhenius acids and bases among the following: 1.NaCl2.HCl3.Cu(OH)24.NaOH5.H2SO46.HNO37.KOH
Answer» Identify Arrhenius acids and bases among the following: $\begin{matrix} 1. N a C l & 2. H C l 3. C u {(O H)}_{2} & 4. N a O H 5. H_{2} S O_{4} & 6. H N O_{3} 7. K O H \end{matrix}$

Discussion

15106.	Calculate the percentage loss of mass of hydrated copper ll sulphate when completely dehydrated
Answer» Calculate the percentage loss of mass of hydrated copper ll sulphate when completely dehydrated

Discussion

15107.	Dense white fumes are obtained when a jar of HCl gas is inverted over a jar of ammonia gas. Give reasons
Answer» Dense white fumes are obtained when a jar of HCl gas is inverted over a jar of ammonia gas. Give reasons

Discussion

15108.	(a) What are hydrocarbons? Explain with examples. (b) Explain the meaning of saturated and unsaturated hydrocarbons with two examples each. (c) Give the names and structural formulae of one saturated cyclic hydrocarbon and one unsaturated cyclic hydrocarbon. (d) Give one example of a hydrocarbon, other than pentane, having more than three isomers. (e) How many isomers of the following hydrocarbons are possible? (i) C3H8 (ii) C4H10 (iii) C5H12 (iv) C6H14
Answer» (a) What are hydrocarbons? Explain with examples. (b) Explain the meaning of saturated and unsaturated hydrocarbons with two examples each. (c) Give the names and structural formulae of one saturated cyclic hydrocarbon and one unsaturated cyclic hydrocarbon. (d) Give one example of a hydrocarbon, other than pentane, having more than three isomers. (e) How many isomers of the following hydrocarbons are possible? (i) $C_{3} H_{8}$ (ii) $C_{4} H_{10}$ (iii) $C_{5} H_{12}$ (iv) $C_{6} H_{14}$

Discussion

15109.	The colours of aqueous solutions of CuSO4 and FeSO4 as observed in the laboratory are:
Answer» The colours of aqueous solutions of CuSO₄ and FeSO₄ as observed in the laboratory are:

Discussion

15110.	Which of the following gas is released when ammonium nitrite is heated?
Answer» Which of the following gas is released when ammonium nitrite is heated?

Discussion

15111.	At equilibrium, rate of the forward reaction is equal to the rate of the backward reaction
Answer» At equilibrium, rate of the forward reaction is equal to the rate of the backward reaction

Discussion

15112.	When a strip of red-brown metal X is placed in a colourless salt solution YNO3 then metal Y is set free and a blue coloured salt solution X(NO3)2 is formed. The liberated metal Y forms a shining white deposit on the strip of metal X. (a) What do you think metal X is ? (b) Name the salt YNO3. (c) What could be metal Y ? (d) Name the salt X(NO3)2. (e) what type of reaction takes place between metal X and salt soultion YNO3 ?
Answer» When a strip of red-brown metal X is placed in a colourless salt solution $Y N O_{3}$ then metal Y is set free and a blue coloured salt solution $X (N O_{3})_{2}$ is formed. The liberated metal Y forms a shining white deposit on the strip of metal X. (a) What do you think metal X is ? (b) Name the salt $Y N O_{3}$ . (c) What could be metal Y ? (d) Name the salt $X (N O_{3})_{2}$ . (e) what type of reaction takes place between metal X and salt soultion $Y N O_{3}$ ?

15112.

When a strip of red-brown metal X is placed in a colourless salt solution YNO3 then metal Y is set free and a blue coloured salt solution X(NO3)2 is formed. The liberated metal Y forms a shining white deposit on the strip of metal X. (a) What do you think metal X is ? (b) Name the salt YNO3. (c) What could be metal Y ? (d) Name the salt X(NO3)2. (e) what type of reaction takes place between metal X and salt soultion YNO3 ?

Answer»

When a strip of red-brown metal X is placed in a colourless salt solution $Y N O_{3}$ then metal Y is set free and a blue coloured salt solution $X (N O_{3})_{2}$ is formed. The liberated metal Y forms a shining white deposit on the strip of metal X.

(a) What do you think metal X is ?

(b) Name the salt $Y N O_{3}$ .

(c) What could be metal Y ?

(d) Name the salt $X (N O_{3})_{2}$ .

(e) what type of reaction takes place between metal X and salt soultion $Y N O_{3}$ ?

Discussion

15113.	Which of the following is not a unit of temperature?
Answer» Which of the following is not a unit of temperature?

Discussion

15114.	An astronaut on the surface of the moon is thirsty. He decides to synthesize water by mixing hydrogen and oxygen. Will the mass ratio of hydrogen to oxygen in water remain the same on moon's surface as that on earth?
Answer» An astronaut on the surface of the moon is thirsty. He decides to synthesize water by mixing hydrogen and oxygen. Will the mass ratio of hydrogen to oxygen in water remain the same on moon's surface as that on earth?

Discussion

15115.	The position of three elements A,B and C in the periodic table are shown below: [5 MARKS] (a) State whether A is a metal or non-metals.(b) Will C be larger or smaller in size than B? (C) State whether C is more reactive or less reactive than A. (d) Which type of ion, cation, or anion will be formed by element A? (e) Give two examples of group 17.
Answer» The position of three elements A,B and C in the periodic table are shown below: [5 MARKS] (a) State whether A is a metal or non-metals. (b) Will C be larger or smaller in size than B? (C) State whether C is more reactive or less reactive than A. (d) Which type of ion, cation, or anion will be formed by element A? (e) Give two examples of group 17.

15115.

The position of three elements A,B and C in the periodic table are shown below: [5 MARKS] (a) State whether A is a metal or non-metals.(b) Will C be larger or smaller in size than B? (C) State whether C is more reactive or less reactive than A. (d) Which type of ion, cation, or anion will be formed by element A? (e) Give two examples of group 17.

Answer»

The position of three elements A,B and C in the periodic table are shown below: [5 MARKS]

(a) State whether A is a metal or non-metals.

(b) Will C be larger or smaller in size than B?
(C) State whether C is more reactive or less reactive than A.
(d) Which type of ion, cation, or anion will be formed by element A?
(e) Give two examples of group 17.

Discussion

15116.	The heat released when steam is converted into water is equal to?
Answer» The heat released when steam is converted into water is equal to?

Discussion

15117.	White silver chloride in sunlight turns to
Answer» White silver chloride in sunlight turns to

Discussion

15118.	Balance the equation:- C8H18+O2=CO2+H20
Answer» Balance the equation:- C8H18+O2=CO2+H20

15118.

Balance the equation:- C8H18+O2=CO2+H20

Answer»

Balance the equation:-

C8H18+O2=CO2+H20

Discussion

15119.	Match the following. Relate physical states used in chemical reaction to their symbols. Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water (solution with water)(D) (l)
Answer» Match the following. Relate physical states used in chemical reaction to their symbols. $\begin{matrix} Physical State & Symbol 1.Gas & (A) (s) 2.Solid & (B) (g) 3.Liquid & (C) (aq) 4.Dissolved in water (solution with water) & (D) (l) \end{matrix}$

15119.

Match the following. Relate physical states used in chemical reaction to their symbols. Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water (solution with water)(D) (l)

Answer»

Match the following.

Relate physical states used in chemical reaction to their symbols.

$\begin{matrix} Physical State & Symbol 1.Gas & (A) (s) 2.Solid & (B) (g) 3.Liquid & (C) (aq) 4.Dissolved in water (solution with water) & (D) (l) \end{matrix}$

Discussion

15120.	The reaction between aluminium carbide and water takes place according to the following equation: Al4C3+12H2O→3CH4+4Al(OH)3 Calculate the volume fo methane measured at STP released from 14.4 g of aluminum carbide by excess fo water.
Answer» The reaction between aluminium carbide and water takes place according to the following equation: $A l_{4} C_{3} + 12 H_{2} O \to 3 C H_{4} + 4 A l (O H)_{3}$ Calculate the volume fo methane measured at STP released from 14.4 g of aluminum carbide by excess fo water.

Discussion

15121.	Question 106 A room is 4.5 m long and 4 m wide. The floor of the room is to be covered with tiles of size 15 cm by 10 cm. Find the cost of covering the floor with tiles at the rate of Rs 4.50 per tile.
Answer» Question 106 A room is 4.5 m long and 4 m wide. The floor of the room is to be covered with tiles of size 15 cm by 10 cm. Find the cost of covering the floor with tiles at the rate of Rs 4.50 per tile.

15121.

Question 106 A room is 4.5 m long and 4 m wide. The floor of the room is to be covered with tiles of size 15 cm by 10 cm. Find the cost of covering the floor with tiles at the rate of Rs 4.50 per tile.

Answer»

Question 106

A room is 4.5 m long and 4 m wide. The floor of the room is to be covered with tiles of size 15 cm by 10 cm. Find the cost of covering the floor with tiles at the rate of Rs 4.50 per tile.

Discussion

15122.	Give reason 1. Aluminum is more reactive than iron yet there is less corrosion of aluminum as compared to iron when both are exposed to air. 2. Tarnished copper vessels are cleaned with tamrind juice.
Answer» Give reason 1. Aluminum is more reactive than iron yet there is less corrosion of aluminum as compared to iron when both are exposed to air. 2. Tarnished copper vessels are cleaned with tamrind juice.

15122.

Give reason 1. Aluminum is more reactive than iron yet there is less corrosion of aluminum as compared to iron when both are exposed to air. 2. Tarnished copper vessels are cleaned with tamrind juice.

Answer»

Give reason

1. Aluminum is more reactive than iron yet there is less corrosion of aluminum as compared to iron when both are exposed to air.

2. Tarnished copper vessels are cleaned with tamrind juice.

Discussion

15123.	Which ion will be migrating towards anode during electrolysis of concentrated NaCl solution? OR What will be the reaction taking place at anode during the electrolysis of concentrated NaCl solution?
Answer» Which ion will be migrating towards anode during electrolysis of concentrated NaCl solution? OR What will be the reaction taking place at anode during the electrolysis of concentrated NaCl solution?

15123.

Which ion will be migrating towards anode during electrolysis of concentrated NaCl solution? OR What will be the reaction taking place at anode during the electrolysis of concentrated NaCl solution?

Answer»

Which ion will be migrating towards anode during electrolysis of concentrated NaCl solution?

OR

What will be the reaction taking place at anode during the electrolysis of concentrated NaCl solution?

Discussion

15124.	Select the option which is a property of sulphuric acid?
Answer» Select the option which is a property of sulphuric acid?

Discussion

15125.	Why saturated compounds give clean flames and unsaturated compounds yellow flames???
Answer» Why saturated compounds give clean flames and unsaturated compounds yellow flames???

Discussion

15126.	Name an allotrope of carbon which contains both single and double bonds between carbon atoms.
Answer» Name an allotrope of carbon which contains both single and double bonds between carbon atoms.

Discussion

15127.	IUPAC name of the compound given below is
Answer» IUPAC name of the compound given below is

Discussion

15128.	Why do we classify hydrocarbons are saturated and unsaturated
Answer» Why do we classify hydrocarbons are saturated and unsaturated

Discussion

15129.	on passing excess co2 through limewater it first turns milky and then becomes colourless ? and write the chemical equations?
Answer» on passing excess co2 through limewater it first turns milky and then becomes colourless ? and write the chemical equations?

Discussion

15130.	What is the chemical formula of wood but in the lost in island video they show that chemical equation of wood is C6H12O6 but it is formula of glucose
Answer» What is the chemical formula of wood but in the lost in island video they show that chemical equation of wood is C6H12O6 but it is formula of glucose

Discussion

15131.	Toxic chemical released by paper industry is
Answer» Toxic chemical released by paper industry is

Discussion

15132.	In a laboratory preparation of hydrogen gas, what would happen (write chemical reactions) if the following changes are made? 1) in place of zinc granules, same amount of zinc dust is taken in test tube 2) instead of dilute sulphuric acid, hydrochloric acid is taken 3) In place of zinc, copper turning are taken 4) sodium hydroxide is taken in place of sulphuric acid and tube is heated
Answer» In a laboratory preparation of hydrogen gas, what would happen (write chemical reactions) if the following changes are made? 1) in place of zinc granules, same amount of zinc dust is taken in test tube 2) instead of dilute sulphuric acid, hydrochloric acid is taken 3) In place of zinc, copper turning are taken 4) sodium hydroxide is taken in place of sulphuric acid and tube is heated

Discussion

15133.	Why pure acetic acid is called glacial acetic acid?
Answer» Why pure acetic acid is called glacial acetic acid?

Discussion

15134.	If the valency of hydrogen is 1 and and the valency of carbonate is 2 then how HCO3 is formed?
Answer» If the valency of hydrogen is 1 and and the valency of carbonate is 2 then how HCO₃ is formed?

Discussion

15135.	Oxides of Metals are:
Answer» Oxides of Metals are:

Discussion

15136.	State the major difference between the composition of steel and stainless steel. Why is stainless steel considered better than steel?
Answer» State the major difference between the composition of steel and stainless steel. Why is stainless steel considered better than steel?

Discussion

15137.	The electronic configuration of an element X is 2,8,6. What is the group and period number of element X in the periodic table?
Answer» The electronic configuration of an element X is 2,8,6. What is the group and period number of element X in the periodic table?

Discussion

15138.	Two nails supported on a rubber cork are dipped in dil. HCl solution as shown. When a potential difference of 6V is applied through the solution, bulb glows. What will happen when HCl solution is replaced by glucose solution in the given experiment?
Answer» Two nails supported on a rubber cork are dipped in dil. HCl solution as shown. When a potential difference of 6V is applied through the solution, bulb glows. What will happen when HCl solution is replaced by glucose solution in the given experiment?

15138.

Two nails supported on a rubber cork are dipped in dil. HCl solution as shown. When a potential difference of 6V is applied through the solution, bulb glows. What will happen when HCl solution is replaced by glucose solution in the given experiment?

Answer»

Two nails supported on a rubber cork are dipped in dil. HCl solution as shown. When a potential difference of 6V is applied through the solution, bulb glows. What will happen when HCl solution is replaced by glucose solution in the given experiment?

Discussion

15139.	Which of the following is not isoelectronic series?
Answer» Which of the following is not isoelectronic series?

Discussion

15140.	Which of the following is the correct cause of stability of completely filled and half-filled sub-shells?
Answer» Which of the following is the correct cause of stability of completely filled and half-filled sub-shells?

Discussion

15141.	Which of the following reactions is exothermic?
Answer» Which of the following reactions is exothermic?

Discussion

15142.	Question 1 How many structural isomers can you draw for pentane?
Answer» Question 1 How many structural isomers can you draw for pentane?

Discussion

15143.	How many electrons are shared between carbon and hydrogen in CH4 ?
Answer» How many electrons are shared between carbon and hydrogen in CH₄ ?

Discussion

15144.	Select the limitations of Mendeleev's periodic table from the given options.
Answer» Select the limitations of Mendeleev's periodic table from the given options.

Discussion

15145.	The order in which the following oxides are arranged according to decreasing basic nature is
Answer» The order in which the following oxides are arranged according to decreasing basic nature is

15145.

The order in which the following oxides are arranged according to decreasing basic nature is

Answer»

The order in which the following oxides are arranged according to decreasing basic nature is

Discussion

15146.	Zinc oxide reacts with 'y' to give sodium zincate and water. Then 'y' is:
Answer» Zinc oxide reacts with 'y' to give sodium zincate and water. Then 'y' is:

Discussion

15147.	The strength in volumes of a solution containing 30.36 g/litre of H2O2 is
Answer» The strength in volumes of a solution containing 30.36 g/litre of $H_{2} O_{2}$ is

Discussion

15148.	The general formula for alkynes is:
Answer» The general formula for alkynes is:

Discussion

15149.	Please ignore this one : testing purpose
Answer» Please ignore this one : testing purpose

Discussion

15150.	Statement 1: Metal oxides are basic in nature. Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.
Answer» Statement 1: Metal oxides are basic in nature. Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.

15150.

Statement 1: Metal oxides are basic in nature. Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.

Answer»

Statement 1: Metal oxides are basic in nature.

Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.

Discussion

Explore topic-wise InterviewSolutions in .

When and Why is there an effect of concentration of OH ions

Identify Arrhenius acids and bases among the following: 1.NaCl2.HCl3.Cu(OH)24.NaOH5.H2SO46.HNO37.KOH

Calculate the percentage loss of mass of hydrated copper ll sulphate when completely dehydrated

Dense white fumes are obtained when a jar of HCl gas is inverted over a jar of ammonia gas. Give reasons

The colours of aqueous solutions of CuSO4 and FeSO4 as observed in the laboratory are:

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

At equilibrium, rate of the forward reaction is equal to the rate of the backward reaction

Which of the following is not a unit of temperature?

An astronaut on the surface of the moon is thirsty. He decides to synthesize water by mixing hydrogen and oxygen. Will the mass ratio of hydrogen to oxygen in water remain the same on moon's surface as that on earth?

The heat released when steam is converted into water is equal to?

White silver chloride in sunlight turns to

Balance the equation:- C8H18+O2=CO2+H20

Match the following. Relate physical states used in chemical reaction to their symbols. Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water (solution with water)(D) (l)

The reaction between aluminium carbide and water takes place according to the following equation: Al4C3+12H2O→3CH4+4Al(OH)3 Calculate the volume fo methane measured at STP released from 14.4 g of aluminum carbide by excess fo water.

Question 106 A room is 4.5 m long and 4 m wide. The floor of the room is to be covered with tiles of size 15 cm by 10 cm. Find the cost of covering the floor with tiles at the rate of Rs 4.50 per tile.

Give reason 1. Aluminum is more reactive than iron yet there is less corrosion of aluminum as compared to iron when both are exposed to air. 2. Tarnished copper vessels are cleaned with tamrind juice.

Which ion will be migrating towards anode during electrolysis of concentrated NaCl solution? OR What will be the reaction taking place at anode during the electrolysis of concentrated NaCl solution?​​​​​​

Select the option which is a property of sulphuric acid?

Why saturated compounds give clean flames and unsaturated compounds yellow flames???

Name an allotrope of carbon which contains both single and double bonds between carbon atoms.

IUPAC name of the compound given below is

Why do we classify hydrocarbons are saturated and unsaturated

on passing excess co2 through limewater it first turns milky and then becomes colourless ? and write the chemical equations?

What is the chemical formula of wood but in the lost in island video they show that chemical equation of wood is C6H12O6 but it is formula of glucose

Toxic chemical released by paper industry is

Why pure acetic acid is called glacial acetic acid?

If the valency of hydrogen is 1 and and the valency of carbonate is 2 then how HCO​​​​3 is formed?

Oxides of Metals are:

State the major difference between the composition of steel and stainless steel. Why is stainless steel considered better than steel?

The electronic configuration of an element X is 2,8,6. What is the group and period number of element X in the periodic table?

Two nails supported on a rubber cork are dipped in dil. HCl solution as shown. When a potential difference of 6V is applied through the solution, bulb glows. What will happen when HCl solution is replaced by glucose solution in the given experiment?

Which of the following is not isoelectronic series?

Which of the following is the correct cause of stability of completely filled and half-filled sub-shells?

Which of the following reactions is exothermic?

Question 1 How many structural isomers can you draw for pentane?

How many electrons are shared between carbon and hydrogen in CH4 ?

Select the limitations of Mendeleev's periodic table from the given options.

The order in which the following oxides are arranged according to decreasing basic nature is

Zinc oxide reacts with 'y' to give sodium zincate and water. Then 'y' is:

The strength in volumes of a solution containing 30.36 g/litre of H2O2 is

The general formula for alkynes is:

Please ignore this one : testing purpose

Statement 1: Metal oxides are basic in nature. Statement 2: Metal oxides neutralize the effect of acids and release water, similar to the reaction of a base with an acid.

Which ion will be migrating towards anode during electrolysis of concentrated NaCl solution? OR What will be the reaction taking place at anode during the electrolysis of concentrated NaCl solution?

If the valency of hydrogen is 1 and and the valency of carbonate is 2 then how HCO3 is formed?