15280 + Interview Questions in Chemistry Page 220 InterviewSolution

10951.	What is strong acid, weak acid, dilute acid and concentrated acid? And why? How strong acid are different from concentrated acid and how dilute acid is different from weak acid?
Answer» What is strong acid, weak acid, dilute acid and concentrated acid? And why? How strong acid are different from concentrated acid and how dilute acid is different from weak acid?

10951.

What is strong acid, weak acid, dilute acid and concentrated acid? And why? How strong acid are different from concentrated acid and how dilute acid is different from weak acid?

Answer»

What is strong acid, weak acid, dilute acid and concentrated acid?

And why?

How strong acid are different from concentrated acid and how dilute acid is different from weak acid?

10952.	The difference in number of hydrogen atoms in the compounds butane and butyne is ________. 4
Answer» The difference in number of hydrogen atoms in the compounds butane and butyne is ________. 4

Discussion

10953.	Choose the correct option given to distinguish between Iron(II) chloride and Copper chloride solution
Answer» Choose the correct option given to distinguish between Iron(II) chloride and Copper chloride solution

Discussion

10954.	What are the reactants in the following reactions? KOH(aq)+HNO3(aq)→H2O(l)+KNO3(aq)
Answer» What are the reactants in the following reactions? $K O H (a q) + H N O_{3} (a q) \to H_{2} O (l) + K N O_{3} (a q)$

10954.

What are the reactants in the following reactions? KOH(aq)+HNO3(aq)→H2O(l)+KNO3(aq)

Answer»

What are the reactants in the following reactions?

$K O H (a q) + H N O_{3} (a q) \to H_{2} O (l) + K N O_{3} (a q)$

Discussion

10955.	on passing excess co2 through limewater it first turns milky and then becomes colourless ? and write the chemical reactions
Answer» on passing excess co2 through limewater it first turns milky and then becomes colourless ? and write the chemical reactions

Discussion

10956.	In alkene (ethene) number of sp2 hybrid carbon atoms are
Answer» In alkene (ethene) number of $s p^{2}$ hybrid carbon atoms are

Discussion

10957.	A pharmacist has 30% and 80% sulphuric acid solution , using which he needs to make 8 lts of a 50% sulphuric acid solution. How many litres of the 80% solution will he need?
Answer» A pharmacist has 30% and 80% sulphuric acid solution , using which he needs to make 8 lts of a 50% sulphuric acid solution. How many litres of the 80% solution will he need?

Discussion

10958.	Which of the following does not lead to loss of biodiversity?
Answer» Which of the following does not lead to loss of biodiversity?

Discussion

10959.	Explain the following: [5 MARKS] (a) Thick white fumes are formed when a glass rod dipped in NH4OH is brought near the mouth of a bottle full of HCl gas. (b) Dry Hydrogen chloride gas does not affect a dry strip of blue litmus but turns red in the presence of a drop of water. (c) Hydrogen Chloride gas is not collected over water.
Answer» Explain the following: [5 MARKS] (a) Thick white fumes are formed when a glass rod dipped in $N H_{4} O H$ is brought near the mouth of a bottle full of HCl gas. (b) Dry Hydrogen chloride gas does not affect a dry strip of blue litmus but turns red in the presence of a drop of water. (c) Hydrogen Chloride gas is not collected over water.

Discussion

10960.	A woman uses a single fixed pulley to lift a bucket of water from a well. The bucket and water together weigh 250N but the woman has to apply an effort of 300N to lift the bucket. Calculate the mechanical advantage of the set-up.
Answer» A woman uses a single fixed pulley to lift a bucket of water from a well. The bucket and water together weigh 250N but the woman has to apply an effort of 300N to lift the bucket. Calculate the mechanical advantage of the set-up.

Discussion

10961.	Question 16.2 Explain the following in terms of gain or loss of oxygen with an examples: Reduction.
Answer» Question 16.2 Explain the following in terms of gain or loss of oxygen with an examples: Reduction.

Discussion

10962.	On combining two aqueous solutions of soluble ionic compounds, a precipitate is formed when
Answer» On combining two aqueous solutions of soluble ionic compounds, a precipitate is formed when

Discussion

10963.	Identify the correct balanced equation from the following chemical reactions.
Answer» Identify the correct balanced equation from the following chemical reactions.

Discussion

10964.	Give the reaction of heating metallic chloride with concentrated H2SO4
Answer» Give the reaction of heating metallic chloride with concentrated H₂SO₄

Discussion

10965.	From the given options select the one with the highest pH value.
Answer» From the given options select the one with the highest pH value.

Discussion

10966.	Which reagent will you use for the following reaction? (a) Cl2/UV light (b) NaCl+H2SO4 (c) Cl2 gas in dark (d) Cl2 gas in the presence of iron in dark
Answer» Which reagent will you use for the following reaction? (a) $C l_{2} / U V l i g h t$ (b) $N a C l + H_{2} S O_{4}$ (c) $C l_{2}$ gas in dark (d) $C l_{2}$ gas in the presence of iron in dark

10966.

Which reagent will you use for the following reaction? (a) Cl2/UV light (b) NaCl+H2SO4 (c) Cl2 gas in dark (d) Cl2 gas in the presence of iron in dark

Answer»

Which reagent will you use for the following reaction?

(a) $C l_{2} / U V l i g h t$ (b) $N a C l + H_{2} S O_{4}$

(c) $C l_{2}$ gas in dark (d) $C l_{2}$ gas in the presence of iron in dark

Discussion

10967.	Calculate the number of moles and the number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?
Answer» Calculate the number of moles and the number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?

Discussion

10968.	H2(g)+V2O5(s)→V2O3(s)+H2O(l) Let the coefficients for the given reaction be as follows: AH2(g)+BV2O5(s)→CV2O3(s)+DH2O(l) What will be the equations for the number of atoms of each element, so that each is balanced?
Answer» $H_{2} (g) + V_{2} O_{5} (s) \to V_{2} O_{3} (s) + H_{2} O (l)$ Let the coefficients for the given reaction be as follows: $A H_{2} (g) + B V_{2} O_{5} (s) \to C V_{2} O_{3} (s) + D H_{2} O (l)$ What will be the equations for the number of atoms of each element, so that each is balanced?

Discussion

10969.	The number of neutrons present in 23892U are:
Answer» The number of neutrons present in $_{92}^{238} U$ are:

Discussion

10970.	What is colour of danger signals? Why? [2 MARKS]
Answer» What is colour of danger signals? Why? [2 MARKS]

Discussion

10971.	What happens to the metallic character of the elements as we go down in a group of the periodic table?
Answer» What happens to the metallic character of the elements as we go down in a group of the periodic table?

Discussion

10972.	X+HCl→ZnCl2+H2O+CO2 Find X and balance the equation?
Answer» $X + H C l \to Z n C l_{2} + H_{2} O + C O_{2}$ Find X and balance the equation?

10972.

X+HCl→ZnCl2+H2O+CO2 Find X and balance the equation?

Answer»

$X + H C l \to Z n C l_{2} + H_{2} O + C O_{2}$

Find X and balance the equation?

Discussion

10973.	Vinay was trying to create sodium acetate, he added ethanoic acid and ‘A’ in an open vessel. He also added few drops of concentrated H2SO4 to this and was surprised when the solution gave a sweet effervescence. So he repeated this experiment in a closed vessel and obtained ethyl acetate. Then he added ‘B’ and created sodium acetate. Find A and B.
Answer» Vinay was trying to create sodium acetate, he added ethanoic acid and ‘A’ in an open vessel. He also added few drops of concentrated $H_{2} S O_{4}$ to this and was surprised when the solution gave a sweet effervescence. So he repeated this experiment in a closed vessel and obtained ethyl acetate. Then he added ‘B’ and created sodium acetate. Find A and B.

Discussion

10974.	Define rancidity.
Answer» Define rancidity.

Discussion

10975.	Why do metals corrode?
Answer» Why do metals corrode?

Discussion

10976.	Sulphuric acid was called ________ by medieval European alchemists.
Answer» Sulphuric acid was called ________ by medieval European alchemists.

Discussion

10977.	The general formula CnH2n for cycloalkanes is the same as that of
Answer» The general formula C_nH_2n for cycloalkanes is the same as that of

Discussion

10978.	What is ore ?give any two ore of Fe, Zn and Al
Answer» What is ore ?give any two ore of Fe, Zn and Al

Discussion

10979.	What is an alloy give examples with diagrams
Answer» What is an alloy give examples with diagrams

Discussion

10980.	What are nomenclature
Answer» What are nomenclature

Discussion

10981.	(a) Name an ore of zinc. (b) Which process is applied to concentrate it? (c) How is concentrated ore changed to oxide?
Answer» (a) Name an ore of zinc. (b) Which process is applied to concentrate it? (c) How is concentrated ore changed to oxide?

10981.

(a) Name an ore of zinc. (b) Which process is applied to concentrate it? (c) How is concentrated ore changed to oxide?

Answer»

(a) Name an ore of zinc.

(b) Which process is applied to concentrate it?

(c) How is concentrated ore changed to oxide?

Discussion

10982.	Which of the following is used for the treatment of indigestion?
Answer» Which of the following is used for the treatment of indigestion?

Discussion

10983.	Use Mendeleev's Periodic Table to predict the formula of (a) hydrides of carbon and silicon (b) oxides of potassium, aluminium and barium.
Answer» Use Mendeleev's Periodic Table to predict the formula of (a) hydrides of carbon and silicon (b) oxides of potassium, aluminium and barium.

10983.

Use Mendeleev's Periodic Table to predict the formula of (a) hydrides of carbon and silicon (b) oxides of potassium, aluminium and barium.

Answer»

Use Mendeleev's Periodic Table to predict the formula of

(a) hydrides of carbon and silicon

(b) oxides of potassium, aluminium and barium.

Discussion

10984.	Define an alloy and an amalgam. State the main constituents of the following alloys: i. Stainless steel ii. Bronze
Answer» Define an alloy and an amalgam. State the main constituents of the following alloys: i. Stainless steel ii. Bronze

10984.

Define an alloy and an amalgam. State the main constituents of the following alloys: i. Stainless steel ii. Bronze

Answer»

Define an alloy and an amalgam. State the main constituents of the following alloys:

i. Stainless steel
ii. Bronze

Discussion

10985.	Can I get all the chemical properties of metals ?
Answer» Can I get all the chemical properties of metals ?

Discussion

10986.	4 L of water is added to 6 L of a 2 M HCl solution. What is the molarity of the resultant solution?
Answer» $4 L$ of water is added to $6 L$ of a $2 M$ $H C l$ solution. What is the molarity of the resultant solution?

Discussion

10987.	The IUPAC name of
Answer» The IUPAC name of

Discussion

10988.	Element x is strongly electropositive and y is strongly electronegative. Both element are univalent, the compounds formed by their combination will be
Answer» Element x is strongly electropositive and y is strongly electronegative. Both element are univalent, the compounds formed by their combination will be

10988.

Element x is strongly electropositive and y is strongly electronegative. Both element are univalent, the compounds formed by their combination will be

Answer»

Element x is strongly electropositive and y is strongly electronegative. Both element are univalent, the compounds formed by their combination will be

Discussion

10989.	What is fire? What is it composed of?
Answer» What is fire? What is it composed of?

Discussion

10990.	(a) In a tabular form, differentiate between ethanol and ethanoic acid under the following heads (b)Write a chemical reaction to show the dehydration of ethanol. OR (a)What is soap? Why are soaps not suitable for washing clothes when the water is hard? (b)Explain the action of soap in removing an oily spot from a piece of cloth.
Answer» (a) In a tabular form, differentiate between ethanol and ethanoic acid under the following heads (b)Write a chemical reaction to show the dehydration of ethanol. OR (a)What is soap? Why are soaps not suitable for washing clothes when the water is hard? (b)Explain the action of soap in removing an oily spot from a piece of cloth.

10990.

(a) In a tabular form, differentiate between ethanol and ethanoic acid under the following heads (b)Write a chemical reaction to show the dehydration of ethanol. OR (a)What is soap? Why are soaps not suitable for washing clothes when the water is hard? (b)Explain the action of soap in removing an oily spot from a piece of cloth.

Answer»

(a) In a tabular form, differentiate between ethanol and ethanoic acid under the following heads

(b)Write a chemical reaction to show the dehydration of ethanol.

OR

(a)What is soap? Why are soaps not suitable for washing clothes when the water is hard?

(b)Explain the action of soap in removing an oily spot from a piece of cloth.

Discussion

10991.	Alkenes have a general formula:
Answer» Alkenes have a general formula:

Discussion

10992.	The correct order of increasing C-O bond length of CO,CO32−,CO2 is:
Answer» The correct order of increasing C-O bond length of $C O, {C O_{3}}^{2 -}$ , $C O_{2}$ is:

Discussion

10993.	When sodium sulphite reacts with the dilute hydrochloric acid, salt X, water and gas Y is formed. Gas X decolourised pink potassium permanganate solution. Gas X is:
Answer» When sodium sulphite reacts with the dilute hydrochloric acid, salt X, water and gas Y is formed. Gas X decolourised pink potassium permanganate solution. Gas X is:

Discussion

10994.	Which of the following electronic configuration represent a violation of Hund's rule for an atom in its ground state?
Answer» Which of the following electronic configuration represent a violation of Hund's rule for an atom in its ground state?

Discussion

10995.	Gram Atomic mass is just the atomic mass expressed in grams ...ie, atomic mass with gram as units. Our book says that gram atomic mass and gram atom are the same thing (similarly for gram molecule and gram molecular mass) . But later a formula is given that : Gram atom = mass in grams / Atomic mass [RAM]. There are questions also that use this formula ( similarly for gram molecule) in which we have to find the number of "gram atoms " in a given mass of substance. So what is the real meaning of gram atom and the formula ( and is is similar for gram molecules) ?
Answer» Gram Atomic mass is just the atomic mass expressed in grams ...ie, atomic mass with gram as units. Our book says that gram atomic mass and gram atom are the same thing (similarly for gram molecule and gram molecular mass) . But later a formula is given that : Gram atom = mass in grams / Atomic mass [RAM]. There are questions also that use this formula ( similarly for gram molecule) in which we have to find the number of "gram atoms " in a given mass of substance. So what is the real meaning of gram atom and the formula ( and is is similar for gram molecules) ?

10995.

Gram Atomic mass is just the atomic mass expressed in grams ...ie, atomic mass with gram as units. Our book says that gram atomic mass and gram atom are the same thing (similarly for gram molecule and gram molecular mass) . But later a formula is given that : Gram atom = mass in grams / Atomic mass [RAM]. There are questions also that use this formula ( similarly for gram molecule) in which we have to find the number of "gram atoms " in a given mass of substance. So what is the real meaning of gram atom and the formula ( and is is similar for gram molecules) ?

Answer»

Gram Atomic mass is just the atomic mass expressed in grams ...ie, atomic mass with gram as units. Our book says that gram atomic mass and gram atom are the same thing (similarly for gram molecule and gram molecular mass) . But later a formula is given that : Gram atom = mass in grams / Atomic mass [RAM].

There are questions also that use this formula ( similarly for gram molecule) in which we have to find the number of "gram atoms " in a given mass of substance.

So what is the real meaning of gram atom and the formula ( and is is similar for gram molecules) ?

Discussion

10996.	Benzene with molecular formula, C6H6, has
Answer» Benzene with molecular formula, C₆H₆, has

Discussion

10997.	A compound HA when reacting with S, it dissociates as shown below: HA+S⇌ A− + SH+ What are S and A?
Answer» A compound HA when reacting with S, it dissociates as shown below: $H A + S ⇌$ $A^{-}$ + $S H^{+}$ What are S and A?

10997.

A compound HA when reacting with S, it dissociates as shown below: HA+S⇌ A− + SH+ What are S and A?

Answer»

A compound HA when reacting with S, it dissociates as shown below:

$H A + S ⇌$ $A^{-}$ + $S H^{+}$

What are S and A?

Discussion

10998.	The term used to describe the increase in concentration of a non-biodegradable substance in successive trophic levels is
Answer» The term used to describe the increase in concentration of a non-biodegradable substance in successive trophic levels is

Discussion

10999.	Statement-1: The atomicity of a given compound varies as per its state of matter. Statement-2: The atomicity of H2O is 4 when it is liquid and 3 when it is ice.
Answer» Statement-1: The atomicity of a given compound varies as per its state of matter. Statement-2: The atomicity of $H_{2} O$ is 4 when it is liquid and 3 when it is ice.

Discussion

11000.	Which of the following statement is true for a balanced chemical equation?
Answer» Which of the following statement is true for a balanced chemical equation?

Discussion

Explore topic-wise InterviewSolutions in .

What is strong acid, weak acid, dilute acid and concentrated acid? And why? How strong acid are different from concentrated acid and how dilute acid is different from weak acid?

The difference in number of hydrogen atoms in the compounds butane and butyne is ________. 4

Choose the correct option given to distinguish between Iron(II) chloride and Copper chloride solution

What are the reactants in the following reactions? KOH(aq)+HNO3(aq)→H2O(l)+KNO3(aq)

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

In alkene (ethene) number of sp2 hybrid carbon atoms are

A pharmacist has 30% and 80% sulphuric acid solution , using which he needs to make 8 lts of a 50% sulphuric acid solution. How many litres of the 80% solution will he need?

Which of the following does not lead to loss of biodiversity?

A woman uses a single fixed pulley to lift a bucket of water from a well. The bucket and water together weigh 250N but the woman has to apply an effort of 300N to lift the bucket. Calculate the mechanical advantage of the set-up.

Question 16.2 Explain the following in terms of gain or loss of oxygen with an examples: Reduction.

On combining two aqueous solutions of soluble ionic compounds, a precipitate is formed when

Identify the correct balanced equation from the following chemical reactions.

Give the reaction of heating metallic chloride with concentrated H2SO4

From the given options select the one with the highest pH value.

Which reagent will you use for the following reaction? (a) Cl2/UV light (b) NaCl+H2SO4 (c) Cl2 gas in dark (d) Cl2 gas in the presence of iron in dark

Calculate the number of moles and the number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?

H2(g)+V2O5(s)→V2O3(s)+H2O(l) Let the coefficients for the given reaction be as follows: AH2(g)+BV2O5(s)→CV2O3(s)+DH2O(l) What will be the equations for the number of atoms of each element, so that each is balanced?

The number of neutrons present in 23892U are:

What is colour of danger signals? Why? [2 MARKS]

What happens to the metallic character of the elements as we go down in a group of the periodic table?

X+HCl→ZnCl2+H2O+CO2 Find X and balance the equation?

Define rancidity.

Why do metals corrode?

Sulphuric acid was called ________ by medieval European alchemists.

The general formula CnH2n for cycloalkanes is the same as that of

What is ore ?give any two ore of Fe, Zn and Al

What is an alloy give examples with diagrams

What are nomenclature

(a) Name an ore of zinc. (b) Which process is applied to concentrate it? (c) How is concentrated ore changed to oxide?

Which of the following is used for the treatment of indigestion?

Use Mendeleev's Periodic Table to predict the formula of (a) hydrides of carbon and silicon (b) oxides of potassium, aluminium and barium.

Define an alloy and an amalgam. State the main constituents of the following alloys: i. Stainless steel ii. Bronze

Can I get all the chemical properties of metals ?

4 L of water is added to 6 L of a 2 M HCl solution. What is the molarity of the resultant solution?

The IUPAC name of

Element x is strongly electropositive and y is strongly electronegative. Both element are univalent, the compounds formed by their combination will be

What is fire? What is it composed of?

Alkenes have a general formula:

The correct order of increasing C-O bond length of CO,CO32−,CO2 is:

When sodium sulphite reacts with the dilute hydrochloric acid, salt X, water and gas Y is formed. Gas X decolourised pink potassium permanganate solution. Gas X is:

Which of the following electronic configuration represent a violation of Hund's rule for an atom in its ground state?

Benzene with molecular formula, C6H6, has

A compound HA when reacting with S, it dissociates as shown below: HA+S⇌ A− + SH+ What are S and A?

The term used to describe the increase in concentration of a non-biodegradable substance in successive trophic levels is

Statement-1: The atomicity of a given compound varies as per its state of matter. Statement-2: The atomicity of H2O is 4 when it is liquid and 3 when it is ice.

Which of the following statement is true for a balanced chemical equation?