15280 + Interview Questions in Chemistry Page 275 InterviewSolution

13701.	Name and symbols of all element?
Answer» Name and symbols of all element?

Discussion

13702.	The most abundant metal in the earth crust is___.
Answer» The most abundant metal in the earth crust is___.

Discussion

13703.	All the elements in a group have?
Answer» All the elements in a group have?

Discussion

13704.	In the process of rusting, the metal Iron (Fe) reacts with which substances present in the atmosphere? Write an equation for the process. [2 MARKS]
Answer» In the process of rusting, the metal Iron (Fe) reacts with which substances present in the atmosphere? Write an equation for the process. [2 MARKS]

Discussion

13705.	The color of precipiate formed when barium chloride reacts with sulphuric acid is
Answer» The color of precipiate formed when barium chloride reacts with sulphuric acid is

Discussion

13706.	Benzene is an organic compound with molecular formula .
Answer» Benzene is an organic compound with molecular formula .

Discussion

13707.	Question 48 Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements. (a) Mg and N2 (b) Li and O2 (c) Al and Cl2 (d) K and O2
Answer» Question 48 Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements. (a) $Mg and N_{2}$ (b) $Li and O_{2}$ (c) $Al and {Cl}_{2}$ (d) $K and O_{2}$

Discussion

13708.	For the nomenclature of the hydrocarbon given in the following diagram, the carbon to the right will be the 1st carbon in the main chain. What is the name of the given compound?
Answer» For the nomenclature of the hydrocarbon given in the following diagram, the carbon to the right will be the 1st carbon in the main chain. What is the name of the given compound?

Discussion

13709.	A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP). NH4NO3 → N2O +2H2O What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? (Relative molecular mass of ammonium nitrate is 80.)
Answer» A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP). NH₄NO₃ → N₂O +2H₂O What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? (Relative molecular mass of ammonium nitrate is 80.)

13709.

A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP). NH4NO3 → N2O +2H2O What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? (Relative molecular mass of ammonium nitrate is 80.)

Answer»

A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP).

NH₄NO₃ → N₂O +2H₂O

What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? (Relative molecular mass of ammonium nitrate is 80.)

Discussion

13710.	The functional group in an alcohol is
Answer» The functional group in an alcohol is

Discussion

13711.	Noble metals can only be dissolved in
Answer» Noble metals can only be dissolved in

Discussion

13712.	Can you tell me some trick you memorize all perodic table.???
Answer» Can you tell me some trick you memorize all perodic table.???

Discussion

13713.	(a) from the equation" C+2H2SO4→CO2+2H2O+2SO2 Calculate: (i) hte mass of carbon oxidized by 49 g of sulphuric acid. (ii) the volume of sulphur dioxide measured at STP, linerated at the same time. (b) (i) A compound has the following percentage composition by mass; carbon 14.4 % hydrogen 1.2% and chlorine 84.5 % . Determine the empirical formula of this compound. Work correct to 1 decimal place. (H - 1; C = 12; Cl = 35.5) (ii) The relativ molecular mass of this compound is 168, so what is its molecular formuka?
Answer» (a) from the equation" $C + 2 H_{2} S O_{4} \to C O_{2} + 2 H_{2} O + 2 S O_{2}$ Calculate: (i) hte mass of carbon oxidized by 49 g of sulphuric acid. (ii) the volume of sulphur dioxide measured at STP, linerated at the same time. (b) (i) A compound has the following percentage composition by mass; carbon 14.4 % hydrogen 1.2% and chlorine 84.5 % . Determine the empirical formula of this compound. Work correct to 1 decimal place. (H - 1; C = 12; Cl = 35.5) (ii) The relativ molecular mass of this compound is 168, so what is its molecular formuka?

Discussion

13714.	Which of the following cannot exhibit isomerism ? (a) C4H10 (b) C5H12 (c) C3H8 (d) C6H14
Answer» Which of the following cannot exhibit isomerism ? (a) $C_{4} H_{10}$ (b) $C_{5} H_{12}$ (c) $C_{3} H_{8}$ (d) $C_{6} H_{14}$

Discussion

13715.	(a) Give one example of a chemical reaction. (b) State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules. (c) Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.
Answer» (a) Give one example of a chemical reaction. (b) State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules. (c) Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.

13715.

(a) Give one example of a chemical reaction. (b) State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules. (c) Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.

Answer»

(a) Give one example of a chemical reaction.

(b) State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.

(c) Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.

Discussion

13716.	The metal which is reduced to the corresponding metal by using Carbon is:
Answer» The metal which is reduced to the corresponding metal by using Carbon is:

Discussion

13717.	Give equations to carry out the following conversions. Also, state the necessary conditions for each conversation: [5 MARKS] i) Ethane to Ethylene ii) Methyl iodide to Methane iii) Methane to Methanol iv) Methane to Methyl chloride v) Methane to Carbon tetrachloride vi) Sodium acetate to Methane vii) Acetaldehyde to Ethane viii) Ethane to Acetaldehyde ix) Ethane to Acetic acid x) Methane to Chloroform.
Answer» Give equations to carry out the following conversions. Also, state the necessary conditions for each conversation: [5 MARKS] i) Ethane to Ethylene ii) Methyl iodide to Methane iii) Methane to Methanol iv) Methane to Methyl chloride v) Methane to Carbon tetrachloride vi) Sodium acetate to Methane vii) Acetaldehyde to Ethane viii) Ethane to Acetaldehyde ix) Ethane to Acetic acid x) Methane to Chloroform.

Discussion

13718.	Which of the following metals will displace Zinc from its salt?
Answer» Which of the following metals will displace Zinc from its salt?

Discussion

13719.	Explain the following : (a) Electrovalent compounds conduct electricity in molten or aqueous state. (b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points. (c) Mass of an atom is concentrated inside the nucleus of an atom. (d) Atoms combine by transfer and sharing of electrons (s). (e) An element has atoms with different mass number.
Answer» Explain the following : (a) Electrovalent compounds conduct electricity in molten or aqueous state. (b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points. (c) Mass of an atom is concentrated inside the nucleus of an atom. (d) Atoms combine by transfer and sharing of electrons (s). (e) An element has atoms with different mass number.

13719.

Explain the following : (a) Electrovalent compounds conduct electricity in molten or aqueous state. (b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points. (c) Mass of an atom is concentrated inside the nucleus of an atom. (d) Atoms combine by transfer and sharing of electrons (s). (e) An element has atoms with different mass number.

Answer»

Explain the following :

(a) Electrovalent compounds conduct electricity in molten or aqueous state.

(b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.

(c) Mass of an atom is concentrated inside the nucleus of an atom.

(d) Atoms combine by transfer and sharing of electrons (s).

(e) An element has atoms with different mass number.

Discussion

13720.	The concentration of 9.8 g of H2SO4 in 500 ml solution is ? (A) 0.5 M (B) 0.2 M (C) 0.4 N (D) 0.02 M please tell me the formula to find it also?
Answer» The concentration of 9.8 g of H2SO4 in 500 ml solution is ? (A) 0.5 M (B) 0.2 M (C) 0.4 N (D) 0.02 M please tell me the formula to find it also?

Discussion

13721.	does the ph changes with change in concentration?
Answer» does the ph changes with change in concentration?

Discussion

13722.	Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more than Y but their neutrons are equal in number. Which of the following is correct about X and Y?
Answer» Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more than Y but their neutrons are equal in number. Which of the following is correct about X and Y?

Discussion

13723.	Difference between organic and inorganic compounds
Answer» Difference between organic and inorganic compounds

Discussion

13724.	The functional group in aldehydes is
Answer» The functional group in aldehydes is

Discussion

13725.	What type of chemical bond is present in Sulphuric acid?
Answer» What type of chemical bond is present in Sulphuric acid?

Discussion

13726.	In hydrogenation of unsaturated fatty acids,___ is used as a catalyst
Answer» In hydrogenation of unsaturated fatty acids,___ is used as a catalyst

Discussion

13727.	When a reddish brown metal X comes in contact with air and moisture, it forms a green covering of metal carbonate over the metal X. What is X?
Answer» When a reddish brown metal X comes in contact with air and moisture, it forms a green covering of metal carbonate over the metal X. What is X?

Discussion

13728.	500ml of H2O2 solution liberates 1200ml of O2 at STP during its decomposition. The volume strength of H2O2 solution is
Answer» 500ml of $H_{2}$ $O_{2}$ solution liberates 1200ml of $O_{2}$ at STP during its decomposition. The volume strength of $H_{2}$ $O_{2}$ solution is

Discussion

13729.	Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:
Answer» Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:

Discussion

13730.	A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains:
Answer» A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains:

13730.

A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains:

Answer»

A solution reacts with crushed egg-shells to give a gas that turns lime water milky.

The solution contains:

Discussion

13731.	Draw the possible structural isomers for a compound with molecular formula C4H8.
Answer» Draw the possible structural isomers for a compound with molecular formula $C_{4} H_{8}$ .

Discussion

13732.	Which among the following is/are not a copper releasing IUDs?
Answer» Which among the following is/are not a copper releasing IUDs?

Discussion

13733.	Petroleum ether can be used as
Answer» Petroleum ether can be used as

Discussion

13734.	How does silver holds the valency of 1, 2 and 3? How to find valency of other elements which have more than two valency?
Answer» How does silver holds the valency of 1, 2 and 3? How to find valency of other elements which have more than two valency?

Discussion

13735.	The strength of an alkali depends on the concentration of the hydroxyl or the hydroxide ions produced by it in aqueous solution state I.e ., when dissolved in water. But how is the strength of a base determined if it is not water soluble?
Answer» The strength of an alkali depends on the concentration of the hydroxyl or the hydroxide ions produced by it in aqueous solution state I.e ., when dissolved in water. But how is the strength of a base determined if it is not water soluble?

13735.

The strength of an alkali depends on the concentration of the hydroxyl or the hydroxide ions produced by it in aqueous solution state I.e ., when dissolved in water. But how is the strength of a base determined if it is not water soluble?

Answer»

The strength of an alkali depends on the concentration of the hydroxyl or the hydroxide ions produced by it in aqueous solution state I.e ., when dissolved in water.

But how is the strength of a base determined if it is not water soluble?

Discussion

13736.	Why was the system for classification of elements into triads discarded?
Answer» Why was the system for classification of elements into triads discarded?

Discussion

13737.	A bottle of liquor ammonia should be opened very carefully, only after cooling it in ice because:
Answer» A bottle of liquor ammonia should be opened very carefully, only after cooling it in ice because:

Discussion

13738.	Structural isomers of octane,nonane,decane.with names
Answer» Structural isomers of octane,nonane,decane.with names

Discussion

13739.	What do you mean by amphoteric oxide??
Answer» What do you mean by amphoteric oxide??

Discussion

13740.	(a) How does ethanoic acid react with sodium hydrogen carbonate? Give the equation of the reaction which takes place. (b) Why are carbon and its compounds used as fuels for most applications? (c) Which of the two is better for washing clothes when the water is hard? soap or detergent? Give the reason for your answer.
Answer» (a) How does ethanoic acid react with sodium hydrogen carbonate? Give the equation of the reaction which takes place. (b) Why are carbon and its compounds used as fuels for most applications? (c) Which of the two is better for washing clothes when the water is hard? soap or detergent? Give the reason for your answer.

Discussion

13741.	Why can’t we see an atom with our naked eyes?
Answer» Why can’t we see an atom with our naked eyes?

Discussion

13742.	1L of CO2 becomes 1.6L when passed through a red-hot charcoal(C), amount of CO2 in the mixture will be
Answer» 1L of $C O_{2}$ becomes 1.6L when passed through a red-hot charcoal(C), amount of $C O_{2}$ in the mixture will be

Discussion

13743.	In the following reaction between lead sulphide adn hydrogen peroxide : PbS(s)+4H2O2(aq)⟶PbSO4(s)+4H2O(l) (a) which substance is reduced ? (b) Which substance is oxidised ?
Answer» In the following reaction between lead sulphide adn hydrogen peroxide : $P b S (s) + 4 H_{2} O_{2} (a q) ⟶ P b S O_{4} (s) + 4 H_{2} O (l)$ (a) which substance is reduced ? (b) Which substance is oxidised ?

13743.

In the following reaction between lead sulphide adn hydrogen peroxide : PbS(s)+4H2O2(aq)⟶PbSO4(s)+4H2O(l) (a) which substance is reduced ? (b) Which substance is oxidised ?

Answer»

In the following reaction between lead sulphide adn hydrogen peroxide :

$P b S (s) + 4 H_{2} O_{2} (a q) ⟶ P b S O_{4} (s) + 4 H_{2} O (l)$

(a) which substance is reduced ?

(b) Which substance is oxidised ?

Discussion

13744.	The rate of diffusion of Methane at certain temperature is 2 times that of gas X. The molecular mass of X is___.
Answer» The rate of diffusion of Methane at certain temperature is 2 times that of gas X. The molecular mass of X is___.

Discussion

13745.	Statement I: 2A+3B⟶C 43 moles of C always produced when 3 moles of A and 4moles of B are added Statement II: B is limiting reactant for the given data
Answer» Statement I: 2A+3B $⟶$ C $\frac{4}{3}$ moles of C always produced when 3 moles of A and 4moles of B are added Statement II: B is limiting reactant for the given data

13745.

Statement I: 2A+3B⟶C 43 moles of C always produced when 3 moles of A and 4moles of B are added Statement II: B is limiting reactant for the given data

Answer»

Statement I: 2A+3B $⟶$ C

$\frac{4}{3}$ moles of C always produced when 3 moles of A and 4moles of B are added

Statement II: B is limiting reactant for the given data

Discussion

13746.	A compound X consists of 4.8% carbon and 95.2% bromine by mass. Determine the empirical formula of this compound working correct to one decimal place. [C= 12; Br = 80]
Answer» A compound X consists of 4.8% carbon and 95.2% bromine by mass. Determine the empirical formula of this compound working correct to one decimal place. [C= 12; Br = 80]

13746.

A compound X consists of 4.8% carbon and 95.2% bromine by mass. Determine the empirical formula of this compound working correct to one decimal place. [C= 12; Br = 80]

Answer»

A compound X consists of 4.8% carbon and 95.2% bromine by mass.

Determine the empirical formula of this compound working correct to one decimal place.

[C= 12; Br = 80]

Discussion

13747.	Which of the following methods are employed in the extraction of Sn from Cassiterite
Answer» Which of the following methods are employed in the extraction of Sn from Cassiterite

Discussion

13748.	What should come in place of question mark?
Answer» What should come in place of question mark?

Discussion

13749.	Strong electrolytes are those which [MNR 1983]
Answer» Strong electrolytes are those which [MNR 1983]

13749.

Strong electrolytes are those which [MNR 1983]

Answer»

Strong electrolytes are those which

[MNR 1983]

Discussion

13750.	Write balanced equations for the reactions of aqueous hydrochloric acid on: [3 MARKS] (a) magnesium foil (b) zinc carbonate (c) copper oxide.
Answer» Write balanced equations for the reactions of aqueous hydrochloric acid on: [3 MARKS] (a) magnesium foil (b) zinc carbonate (c) copper oxide.

Discussion

Explore topic-wise InterviewSolutions in .

Name and symbols of all element?

The most abundant metal in the earth crust is___.

All the elements in a group have?

In the process of rusting, the metal Iron (Fe) reacts with which substances present in the atmosphere? Write an equation for the process. [2 MARKS]

The color of precipiate formed when barium chloride reacts with sulphuric acid is

Benzene is an organic compound with molecular formula .

Question 48 Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements. (a) Mg and N2 (b) Li and O2 (c) Al and Cl2 (d) K and O2

For the nomenclature of the hydrocarbon given in the following diagram, the carbon to the right will be the 1st carbon in the main chain. What is the name of the given compound?

A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP). NH4NO3 → N2O +2H2O What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? (Relative molecular mass of ammonium nitrate is 80.)

The functional group in an alcohol is

Noble metals can only be dissolved in

Can you tell me some trick you memorize all perodic table.???

Which of the following cannot exhibit isomerism ? (a) C4H10 (b) C5H12 (c) C3H8 (d) C6H14

The metal which is reduced to the corresponding metal by using Carbon is:

Which of the following metals will displace Zinc from its salt?

The concentration of 9.8 g of H2SO4 in 500 ml solution is ? (A) 0.5 M (B) 0.2 M (C) 0.4 N (D) 0.02 M please tell me the formula to find it also?

does the ph changes with change in concentration?

Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more ​​​​​than Y but their neutrons are equal in number. Which of the following is correct about X and Y?

Difference between organic and inorganic compounds

The functional group in aldehydes is

What type of chemical bond is present in Sulphuric acid?

In hydrogenation of unsaturated fatty acids,___ is used as a catalyst

When a reddish brown metal X comes in contact with air and moisture, it forms a green covering of metal carbonate over the metal X. What is X?

500ml of H2O2 solution liberates 1200ml of O2 at STP during its decomposition. The volume strength of H2O2 solution is

Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:

A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains:

Draw the possible structural isomers for a compound with molecular formula C4H8.

Which among the following is/are not a copper releasing IUDs?

Petroleum ether can be used as

How does silver holds the valency of 1, 2 and 3? How to find valency of other elements which have more than two valency?

The strength of an alkali depends on the concentration of the hydroxyl or the hydroxide ions produced by it in aqueous solution state I.e ., when dissolved in water. But how is the strength of a base determined if it is not water soluble?

Why was the system for classification of elements into triads discarded?

A bottle of liquor ammonia should be opened very carefully, only after cooling it in ice because:

Structural isomers of octane,nonane,decane.with names

What do you mean by amphoteric oxide??

Why can’t we see an atom with our naked eyes?

1L of CO2 becomes 1.6L when passed through a red-hot charcoal(C), amount of CO2 in the mixture will be

In the following reaction between lead sulphide adn hydrogen peroxide : PbS(s)+4H2O2(aq)⟶PbSO4(s)+4H2O(l) (a) which substance is reduced ? (b) Which substance is oxidised ?

The rate of diffusion of Methane at certain temperature is 2 times that of gas X. The molecular mass of X is___.

Statement I: 2A+3B⟶C 43 moles of C always produced when 3 moles of A and 4moles of B are added Statement II: B is limiting reactant for the given data

A compound X consists of 4.8% carbon and 95.2% bromine by mass. Determine the empirical formula of this compound working correct to one decimal place. [C= 12; Br = 80]

Which of the following methods are employed in the extraction of Sn from Cassiterite

What should come in place of question mark?

Strong electrolytes are those which [MNR 1983]

Write balanced equations for the reactions of aqueous hydrochloric acid on: [3 MARKS] (a) magnesium foil (b) zinc carbonate (c) copper oxide.

Two elements X and Y need to be arranged in Mendeleev's periodic table. X has 3 protons more than Y but their neutrons are equal in number. Which of the following is correct about X and Y?