5083 + Interview Questions in Chemistry Page 49 InterviewSolution

2401.	A ___ is formed by the physical combination of two or more substances, where the entities retain their identities.
Answer» A ___ is formed by the physical combination of two or more substances, where the entities retain their identities.

Discussion

2402.	Question 8Among the given options, which one is not correct for the use of a large amount of fertilisers and pesticides?(a) They are eco-friendly(b) They turn the fields barren after some time(c) They adversely affect the useful component of the soil(d) They destroy the soil fertility
Answer» Question 8 Among the given options, which one is not correct for the use of a large amount of fertilisers and pesticides? (a) They are eco-friendly (b) They turn the fields barren after some time (c) They adversely affect the useful component of the soil (d) They destroy the soil fertility

Discussion

2403.	how many ways a bond between two atoms can cleave? 1.one 2. five 3.three 4. four
Answer» how many ways a bond between two atoms can cleave? 1.one 2. five 3.three 4. four

Discussion

2404.	what is variable valency ?
Answer» what is variable valency ?

Discussion

2405.	Answer the followingA. What is done to prevent corrosion of metals?B. What are the metals that make the alloys brass and bronze ?C. What are the adverse effects of corrosion ?D. What are use of Noble metals. ?
Answer» Answer the following A. What is done to prevent corrosion of metals? B. What are the metals that make the alloys brass and bronze ? C. What are the adverse effects of corrosion ? D. What are use of Noble metals. ?

Discussion

2406.	Pashmina shawl is famous product from
Answer» Pashmina shawl is famous product from

Discussion

2407.	What are the games orhuman activities which use trees, or in which trees also‘participate’?
Answer» What are the games or human activities which use trees, or in which trees also ‘participate’?

Discussion

2408.	Which of the following is odd one out?
Answer» Which of the following is odd one out?

Discussion

2409.	Categorize rolling of dough and baking of roti as physical or chemical changes.
Answer» Categorize rolling of dough and baking of roti as physical or chemical changes.

Discussion

2410.	The solubility product (Ksp;mol3dm−9) of MX2 at 298 K based on the information available for the given concentration cell is (take 2.303×R×298/F=0.059 V)
Answer» The solubility product $(K_{s p}; {mol}^{3} d m^{- 9})$ of $M X_{2}$ at $298 K$ based on the information available for the given concentration cell is (take $2.303 \times R \times 298 / F = 0.059 V$ )

Discussion

2411.	equilibrium constants under similar conditions for dissociation of complex compound A,B, C and D are 2 × 10-12, 1 x 10-105x10-12 andx 10-10 respectively. The correct increasing orderof stability of A, B, C and D is(1) A
Answer» equilibrium constants under similar conditions for dissociation of complex compound A,B, C and D are 2 × 10-12, 1 x 10-105x10-12 andx 10-10 respectively. The correct increasing orderof stability of A, B, C and D is(1) A

Discussion

2412.	In addition to rock particles soil also contains________.
Answer» In addition to rock particles soil also contains________.

Discussion

2413.	How high hydration enthalpy of Li account for its high negative electrode potential value
Answer» How high hydration enthalpy of Li account for its high negative electrode potential value

Discussion

2414.	What is the relation when w/w% and w/v% are equal?
Answer» What is the relation when w/w% and w/v% are equal?

Discussion

2415.	aq.medium cu2+is more stable than cu+due to its high hydration energy which compensate IE2 what is the meaning of line
Answer» aq.medium cu2+is more stable than cu+due to its high hydration energy which compensate IE2 what is the meaning of line

Discussion

2416.	Which gas is released when acid reacts with metals?
Answer» Which gas is released when acid reacts with metals?

Discussion

2417.	Balance this equation ( I )No2+H2O=HNo2+HNO3
Answer» Balance this equation ( I )No2+H2O=HNo2+HNO3

Discussion

2418.	If a bottle weighs 30 g when empty, 53.3 g when filled with a liquid and 48 g when filled with water, how to calculate the density of the liquid if density of water is 1000kg/m3?
Answer» If a bottle weighs 30 g when empty, 53.3 g when filled with a liquid and 48 g when filled with water, how to calculate the density of the liquid if density of water is $1000 k g / m^{3}$ ?

Discussion

2419.	(A) follow first order reaction : A→ product; concentration of A changes from 0.1M to 0.025M in 40min . Find the rate of reaction of A when its concentration is 0.01M
Answer» (A) follow first order reaction : A→ product; concentration of A changes from 0.1M to 0.025M in 40min . Find the rate of reaction of A when its concentration is 0.01M

Discussion

2420.	Write the chemical formula of the sulphate of Aluminium, Ammonium and Zinc.
Answer» Write the chemical formula of the sulphate of Aluminium, Ammonium and Zinc.

Discussion

2421.	How many moles of lead (Il) chloride will be formed from a reaction between 6.5g of PbO and 3.2 g ofHCI?(1) 0.029(3) 0.333\lbrack AIPMT (Prelims)-2008\rbrack n(2) 0.044(4) 0.011
Answer» How many moles of lead (Il) chloride will be formed from a reaction between 6.5g of PbO and 3.2 g ofHCI?(1) 0.029(3) 0.333\lbrack AIPMT (Prelims)-2008\rbrack n(2) 0.044(4) 0.011

Discussion

2422.	It was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following werethe activities going on at Paheli’s home: Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed.(i) Simba blew balloons and put them on the wall.(ii) Some of the balloons burst.(iii) Paheli cut colorful strips of paper and put them on the wall with the help of tape.(iv) She also made some flowers by origami (paper folding) to decorate the house.(v) Her father made dough balls.(vi) Mother rolled the dough balls to make puris.(vii) Mother heated oil in a pan.(viii) Father fried the puris in hot oil.
Answer» It was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli’s home: Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed. (i) Simba blew balloons and put them on the wall. (ii) Some of the balloons burst. (iii) Paheli cut colorful strips of paper and put them on the wall with the help of tape. (iv) She also made some flowers by origami (paper folding) to decorate the house. (v) Her father made dough balls. (vi) Mother rolled the dough balls to make puris. (vii) Mother heated oil in a pan. (viii) Father fried the puris in hot oil.

Discussion

2423.	(a) What are the two ways in which the physical states of matter can be changed?(b) Draw the 'states of matter triangle' to show the interconversion of states of matter.(c) How can the evaporation of a liquid be made faster?
Answer» (a) What are the two ways in which the physical states of matter can be changed? (b) Draw the 'states of matter triangle' to show the interconversion of states of matter. (c) How can the evaporation of a liquid be made faster?

Discussion

2424.	Select the correct statement regarding dry ice:
Answer» Select the correct statement regarding dry ice:

Discussion

2425.	Function(s) of ozone layer is/are
Answer» Function(s) of ozone layer is/are

Discussion

2426.	Which of the following acid is present in protein?
Answer» Which of the following acid is present in protein?

Discussion

2427.	You are given three test-tubes which contain an acidic solution, a basic solution and distilled water, separately. If you are provided only red litmus paper, how will you identify the contents of each test-tube?
Answer» You are given three test-tubes which contain an acidic solution, a basic solution and distilled water, separately. If you are provided only red litmus paper, how will you identify the contents of each test-tube?

Discussion

2428.	An antacid tablet contains ___.(choose from acid, base and salt)
Answer» An antacid tablet contains ___.(choose from acid, base and salt)

Discussion

2429.	1.2 kg ice at 0^° C is mixed with 1 kg water at 24^° Cin a closed calorimeter. The fraction of ice thatmelts is (L,= 80 cal/g)
Answer» 1.2 kg ice at 0^° C is mixed with 1 kg water at 24^° Cin a closed calorimeter. The fraction of ice thatmelts is (L,= 80 cal/g)

Discussion

2430.	Carbon dioxide is the most commonly used gas for extinguishing a fire. Which properties of carbon dioxide are used here?
Answer» Carbon dioxide is the most commonly used gas for extinguishing a fire. Which properties of carbon dioxide are used here?

Discussion

2431.	Velocity constant of a reaction at 290 K was found to 3.2×10−3sec−1. When the temperature is raised to 310 K, it will be about:
Answer» Velocity constant of a reaction at 290 K was found to $3.2 \times 10^{- 3} s e c^{- 1}$ . When the temperature is raised to 310 K, it will be about:

Discussion

2432.	Which of the following can be categorised as both reversible and irreversible change?
Answer» Which of the following can be categorised as both reversible and irreversible change?

Discussion

2433.	if 340 g mixture of N2 and H2 in correct ratio gaveva yield of NH3. the produced mass would b
Answer» if 340 g mixture of N2 and H2 in correct ratio gaveva yield of NH3. the produced mass would b

Discussion

2434.	Classify the following substances as acids , bases and salts . 1-Oil of vitriol 2-White vitriol 3-Green vitriol
Answer» Classify the following substances as acids , bases and salts . 1-Oil of vitriol 2-White vitriol 3-Green vitriol

Discussion

2435.	What is the term used for "distillation of salt water to separate and collect both components?"
Answer» What is the term used for "distillation of salt water to separate and collect both components?"

Discussion

2436.	Question 5Write an equation to show the reaction between Plaster of Paris and water.
Answer» Question 5 Write an equation to show the reaction between Plaster of Paris and water.

Discussion

2437.	Match the physical state of elements or compounds to their symbols as used while writing chemical equations: 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 physical state of elements or compounds to their symbols as used while writing chemical equations: $\begin{matrix} Physical State & Symbol 1. Gas & (A) (s) 2. Solid & (B) (g) 3. Liquid & (C) (a q) 4. Dissolved in water(solution with water) & (D) (l) \end{matrix}$

2437.

Match the physical state of elements or compounds to their symbols as used while writing chemical equations: 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 physical state of elements or compounds to their symbols as used while writing chemical equations:

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

Discussion

2438.	So the valency of OH in CH³COOH is 2 because C has two bonds with O and 1 bond with OH
Answer» So the valency of OH in CH³COOH is 2 because C has two bonds with O and 1 bond with OH

Discussion

2439.	2. How to find difference between acidic salt and normal salt in terms of n factor ? As Na2HPO4 is acidic salt where as NA2HPO3 is normal salt ?
Answer» 2. How to find difference between acidic salt and normal salt in terms of n factor ? As Na2HPO4 is acidic salt where as NA2HPO3 is normal salt ?

Discussion

2440.	Whenever the chemical reaction is in the form : AX+BY=AY+BX, is it a precipitation reaction ALWAYS? How to identify the precipitate from this?
Answer» Whenever the chemical reaction is in the form : AX+BY=AY+BX, is it a precipitation reaction ALWAYS? How to identify the precipitate from this?

Discussion

2441.	Question 4Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
Answer» Question 4 Why are we able to sip hot tea or milk faster from a saucer rather than a cup?

Discussion

2442.	Which of the following reactions is an endothermic process?
Answer» Which of the following reactions is an endothermic process?

Discussion

2443.	How does rock break down into soil?
Answer» How does rock break down into soil?

Discussion

2444.	Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.
Answer» Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.

Discussion

2445.	Paheli went to the market to buy sarees for her mother. She took out a thread from the edges of the two sarees shown by the shopkeeper and burnt them. One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. Which thread is from a pure cotton saree and which one from a pure silk saree? Give a reason for your answer.
Answer» Paheli went to the market to buy sarees for her mother. She took out a thread from the edges of the two sarees shown by the shopkeeper and burnt them. One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. Which thread is from a pure cotton saree and which one from a pure silk saree? Give a reason for your answer.

Discussion

2446.	Organic matter is usually added to soil. Why?
Answer» Organic matter is usually added to soil. Why?

Discussion

2447.	Classify the following processes into physical or chemical changes:(i) Beating of aluminium metal to make aluminium foil.(ii) Digestion of food.(iii) Cutting of a log of wood into pieces.(iv) Rusting of iron.
Answer» Classify the following processes into physical or chemical changes: (i) Beating of aluminium metal to make aluminium foil. (ii) Digestion of food. (iii) Cutting of a log of wood into pieces. (iv) Rusting of iron.

2447.

Classify the following processes into physical or chemical changes:(i) Beating of aluminium metal to make aluminium foil.(ii) Digestion of food.(iii) Cutting of a log of wood into pieces.(iv) Rusting of iron.

Answer»

Classify the following processes into physical or chemical changes:

(i) Beating of aluminium metal to make aluminium foil.

(ii) Digestion of food.

(iii) Cutting of a log of wood into pieces.

(iv) Rusting of iron.

Discussion

2448.	1. An electric current is passed through silver voltmeter connected to a water voltmeter. The cathode of silver voltmeter weighted 0.108g more at the end of the electrolysis. The volume of oxygen evolved at STP is?
Answer» 1. An electric current is passed through silver voltmeter connected to a water voltmeter. The cathode of silver voltmeter weighted 0.108g more at the end of the electrolysis. The volume of oxygen evolved at STP is?

Discussion

2449.	What is chemical equation
Answer» What is chemical equation

Discussion

2450.	What is the difference between a traditional well and a tube-well?
Answer» What is the difference between a traditional well and a tube-well?

Discussion

Explore topic-wise InterviewSolutions in .

A ___ is formed by the physical combination of two or more substances, where the entities retain their identities.

Question 8Among the given options, which one is not correct for the use of a large amount of fertilisers and pesticides?(a) They are eco-friendly(b) They turn the fields barren after some time(c) They adversely affect the useful component of the soil(d) They destroy the soil fertility

how many ways a bond between two atoms can cleave? 1.one 2. five 3.three 4. four

what is variable valency ?

Answer the followingA. What is done to prevent corrosion of metals?B. What are the metals that make the alloys brass and bronze ?C. What are the adverse effects of corrosion ?D. What are use of Noble metals. ?

Pashmina shawl is famous product from

What are the games orhuman activities which use trees, or in which trees also‘participate’?

Which of the following is odd one out?

Categorize rolling of dough and baking of roti as physical or chemical changes.

The solubility product (Ksp;mol3dm−9) of MX2 at 298 K based on the information available for the given concentration cell is (take 2.303×R×298/F=0.059 V)

equilibrium constants under similar conditions for dissociation of complex compound A,B, C and D are 2 × 10-12, 1 x 10-105x10-12 andx 10-10 respectively. The correct increasing orderof stability of A, B, C and D is(1) A

In addition to rock particles soil also contains________.

How high hydration enthalpy of Li account for its high negative electrode potential value

What is the relation when w/w% and w/v% are equal?

aq.medium cu2+is more stable than cu+due to its high hydration energy which compensate IE2 what is the meaning of line

Which gas is released when acid reacts with metals?

Balance this equation ( I )No2+H2O=HNo2+HNO3

If a bottle weighs 30 g when empty, 53.3 g when filled with a liquid and 48 g when filled with water, how to calculate the density of the liquid if density of water is 1000kg/m3?

(A) follow first order reaction : A→ product; concentration of A changes from 0.1M to 0.025M in 40min . Find the rate of reaction of A when its concentration is 0.01M

Write the chemical formula of the sulphate of Aluminium, Ammonium and Zinc.

How many moles of lead (Il) chloride will be formed from a reaction between 6.5g of PbO and 3.2 g ofHCI?(1) 0.029(3) 0.333\lbrack AIPMT (Prelims)-2008\rbrack n(2) 0.044(4) 0.011

(a) What are the two ways in which the physical states of matter can be changed?(b) Draw the 'states of matter triangle' to show the interconversion of states of matter.(c) How can the evaporation of a liquid be made faster?

Select the correct statement regarding dry ice:

Function(s) of ozone layer is/are

Which of the following acid is present in protein?

You are given three test-tubes which contain an acidic solution, a basic solution and distilled water, separately. If you are provided only red litmus paper, how will you identify the contents of each test-tube?

An antacid tablet contains ___.(choose from acid, base and salt)

1.2 kg ice at 0^° C is mixed with 1 kg water at 24^° Cin a closed calorimeter. The fraction of ice thatmelts is (L,= 80 cal/g)

Carbon dioxide is the most commonly used gas for extinguishing a fire. Which properties of carbon dioxide are used here?

Velocity constant of a reaction at 290 K was found to 3.2×10−3sec−1. When the temperature is raised to 310 K, it will be about:

Which of the following can be categorised as both reversible and irreversible change?

if 340 g mixture of N2 and H2 in correct ratio gaveva yield of NH3. the produced mass would b

Classify the following substances as acids , bases and salts . 1-Oil of vitriol 2-White vitriol 3-Green vitriol

What is the term used for "distillation of salt water to separate and collect both components?"

Question 5Write an equation to show the reaction between Plaster of Paris and water.

Match the physical state of elements or compounds to their symbols as used while writing chemical equations: Physical StateSymbol1.Gas(A) (s)2.Solid(B) (g)3.Liquid(C) (aq)4.Dissolved in water(solution with water)(D) (l)

So the valency of OH in CH³COOH is 2 because C has two bonds with O and 1 bond with OH

2. How to find difference between acidic salt and normal salt in terms of n factor ? As Na2HPO4 is acidic salt where as NA2HPO3 is normal salt ?

Whenever the chemical reaction is in the form : AX+BY=AY+BX, is it a precipitation reaction ALWAYS? How to identify the precipitate from this?

Question 4Why are we able to sip hot tea or milk faster from a saucer rather than a cup?

Which of the following reactions is an endothermic process?

How does rock break down into soil?

Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.

Organic matter is usually added to soil. Why?

Classify the following processes into physical or chemical changes:(i) Beating of aluminium metal to make aluminium foil.(ii) Digestion of food.(iii) Cutting of a log of wood into pieces.(iv) Rusting of iron.

1. An electric current is passed through silver voltmeter connected to a water voltmeter. The cathode of silver voltmeter weighted 0.108g more at the end of the electrolysis. The volume of oxygen evolved at STP is?

What is chemical equation

What is the difference between a traditional well and a tube-well?