7248 + Interview Questions in Chemistry Page 43 InterviewSolution

2101.	What is the work done in an open vessel at 300K , when 112g iron reacts with dilute HCl?
Answer» What is the work done in an open vessel at 300K , when 112g iron reacts with dilute HCl?

Discussion

2102.	36 ml of a gaseous mixture consisting of a gaseous organic compound A and just sufficient amount of oxygen required for complete combustion gives 16 ml of CO_2, 24 ml water vapour and 8 ml of N_2. The volumes are measured at same temperature and pressure. (i) find the volume of O_2 required for complete combustion. (i) The molecular formula of compound will be?
Answer» 36 ml of a gaseous mixture consisting of a gaseous organic compound A and just sufficient amount of oxygen required for complete combustion gives 16 ml of CO_2, 24 ml water vapour and 8 ml of N_2. The volumes are measured at same temperature and pressure. (i) find the volume of O_2 required for complete combustion. (i) The molecular formula of compound will be?

Discussion

2103.	In a test, Rashi has to write the chemical equation for the formation of Hydrochloric acid. She wrote H2(g)+2Cl(g)→2 HCl(g) The teacher marked the answer wrong. Why is it so?
Answer» In a test, Rashi has to write the chemical equation for the formation of Hydrochloric acid. She wrote $H_{2} (g) + 2 C l (g) \to 2 H C l (g)$ The teacher marked the answer wrong. Why is it so?

Discussion

2104.	No. Of structures possible for a compound with molecular formulaC5H10 i.8 ii.10 iii.6 iv. 4
Answer» No. Of structures possible for a compound with molecular formulaC5H10 i.8 ii.10 iii.6 iv. 4

Discussion

2105.	Among the following the least thermally stable is-
Answer» Among the following the least thermally stable is-

Discussion

2106.	Write the chemical formulae of the following. (a) Hydrogen sulphide (b) Aluminium oxide (c) Sodium nitrate
Answer» Write the chemical formulae of the following. (a) Hydrogen sulphide (b) Aluminium oxide (c) Sodium nitrate

2106.

Write the chemical formulae of the following. (a) Hydrogen sulphide (b) Aluminium oxide (c) Sodium nitrate

Answer»

Write the chemical formulae of the following.

(a) Hydrogen sulphide

(b) Aluminium oxide

(c) Sodium nitrate

Discussion

2107.	Find theodd one out from the following:(a) Chair,Bed, Table, Baby, Cupboard(b) Rose,Jasmine, Boat, Marigold, Lotus(c) Aluminium,Iron, Copper, Silver, Sand(d) Sugar,Salt, Sand, Copper sulphate
Answer» Find the odd one out from the following: (a) Chair, Bed, Table, Baby, Cupboard (b) Rose, Jasmine, Boat, Marigold, Lotus (c) Aluminium, Iron, Copper, Silver, Sand (d) Sugar, Salt, Sand, Copper sulphate

2107.

Find theodd one out from the following:(a) Chair,Bed, Table, Baby, Cupboard(b) Rose,Jasmine, Boat, Marigold, Lotus(c) Aluminium,Iron, Copper, Silver, Sand(d) Sugar,Salt, Sand, Copper sulphate

Answer»

Find the
odd one out from the following:

(a) Chair,
Bed, Table, Baby, Cupboard

(b) Rose,
Jasmine, Boat, Marigold, Lotus

(c) Aluminium,
Iron, Copper, Silver, Sand

(d) Sugar,
Salt, Sand, Copper sulphate

Discussion

2108.	Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from the synthetic material? Advise Rana, giving your reason.
Answer» Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from the synthetic material? Advise Rana, giving your reason.

Discussion

2109.	Electricity generated from fossil fuels such as coal and crude oil to run the industries leads to high concentrations of harmful gases in the atmosphere. This causes ozone layer depletion and global warming. What do coal and oil have in it that releases as oxides into the atmosphere?
Answer» Electricity generated from fossil fuels such as coal and crude oil to run the industries leads to high concentrations of harmful gases in the atmosphere. This causes ozone layer depletion and global warming. What do coal and oil have in it that releases as oxides into the atmosphere?

Discussion

2110.	Round off 0.1525 upto two significant figures
Answer» Round off 0.1525 upto two significant figures

Discussion

2111.	What is the difference between combination reaction redox and intermolecular redox?
Answer» What is the difference between combination reaction redox and intermolecular redox?

Discussion

2112.	Of the two which one is better - coke or coal ? why ?
Answer» Of the two which one is better - coke or coal ? why ?

Discussion

2113.	Why there is no rise in water level, when sugar is added to water?
Answer» Why there is no rise in water level, when sugar is added to water?

Discussion

2114.	Maximum metals are obtained in the state of
Answer» Maximum metals are obtained in the state of

Discussion

2115.	Is air made up of matter?
Answer» Is air made up of matter?

Discussion

2116.	Difference between crystal lattice and crystalline solid?
Answer» Difference between crystal lattice and crystalline solid?

Discussion

2117.	Explain the statement "RS and SR are optically active enantiomers if at least one group is different".
Answer» Explain the statement "RS and SR are optically active enantiomers if at least one group is different".

Discussion

2118.	The metal oxides are:
Answer» The metal oxides are:

Discussion

2119.	A student took a beaker and mixed ink and water in it. Will he be able to separate ink and water using decantation process? Explain it. When can we use decantation?
Answer» A student took a beaker and mixed ink and water in it. Will he be able to separate ink and water using decantation process? Explain it. When can we use decantation?

Discussion

2120.	___ is used in the preparation of washing soda, baking powder and urea.
Answer» ___ is used in the preparation of washing soda, baking powder and urea.

Discussion

2121.	1. Define:- with some examples:- a. Displacement reaction. b. Ductility. c. Sonorous . d. Metalloids.
Answer» 1. Define:- with some examples:- a. Displacement reaction. b. Ductility. c. Sonorous . d. Metalloids.

Discussion

2122.	Write any two chemical properties of acids. [3 MARKS]
Answer» Write any two chemical properties of acids. [3 MARKS]

Discussion

2123.	Question 10A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?
Answer» Question 10 A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?

Discussion

2124.	Valency
Answer» Valency

Discussion

2125.	While researching on various air pollutants, a scholar Ravi came across gas 'X'. He concluded that 'X' is a poisonous gas and has a strong smell of rotten eggs. Which among the following can be the gas 'X'?
Answer» While researching on various air pollutants, a scholar Ravi came across gas 'X'. He concluded that 'X' is a poisonous gas and has a strong smell of rotten eggs. Which among the following can be the gas 'X'?

Discussion

2126.	Explain the different states of matter with examples.
Answer» Explain the different states of matter with examples.

Discussion

2127.	the degree of hardness of a given sample of hard water is 40 ppm. If the entire hardness is due to MgSO4, find amount of MgSO4 present per kg of water
Answer» the degree of hardness of a given sample of hard water is 40 ppm. If the entire hardness is due to MgSO4, find amount of MgSO4 present per kg of water

Discussion

2128.

Which separation method is used to separate different mixtures mentioned in column 2? Column 1 Column 2 (a) Separating Funnel (1) Mixture of acetone and water (b) Distillation (2) Mixture of ethanol and methanol (c) Fractional distillation (3) Mixture of kerosene and water (d) Centrifugation (4) Removal of water from clothes in washing machine

Answer»

Which separation method is used to separate different mixtures mentioned in column 2?

Column 1	Column 2
(a) Separating Funnel	(1) Mixture of acetone and water
(b) Distillation	(2) Mixture of ethanol and methanol
(c) Fractional distillation	(3) Mixture of kerosene and water
(d) Centrifugation	(4) Removal of water from clothes in washing machine

Discussion

2129.	18. A conducting bubble of radius a, thickness t has potential v. Now the bubble collapses into a droplet. Find the potential of droplet.
Answer» 18. A conducting bubble of radius a, thickness t has potential v. Now the bubble collapses into a droplet. Find the potential of droplet.

Discussion

2130.	Question 23Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is 24g mol−1.
Answer» Question 23 Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is $24 g m o l^{- 1}$ .

Discussion

2131.	Does titanium lies below the platinum in the reactivity series of metals?
Answer» Does titanium lies below the platinum in the reactivity series of metals?

Discussion

2132.	The given diagram shows the structure of atom with 10 protons and 10 neutrons. Electrons are in their respective shells and the electronic configuration is 2,8. Which element does the diagram represent?
Answer» The given diagram shows the structure of atom with 10 protons and 10 neutrons. Electrons are in their respective shells and the electronic configuration is 2,8. Which element does the diagram represent?

Discussion

2133.	Question 1Specify the charge carried by anions? What happens to an atom ‘A’ if its atom gains two electrons?
Answer» Question 1 Specify the charge carried by anions? What happens to an atom ‘A’ if its atom gains two electrons?

2133.

Question 1Specify the charge carried by anions? What happens to an atom ‘A’ if its atom gains two electrons?

Answer»

Question 1

Specify the charge carried by anions? What happens to an atom ‘A’ if its atom gains two electrons?

Discussion

2134.	A farmer has sown seeds in his field, after sometime the seeds have grown into a crop. What kind of change is growing of seeds into a crop, is it man made or natural. Explain
Answer» A farmer has sown seeds in his field, after sometime the seeds have grown into a crop. What kind of change is growing of seeds into a crop, is it man made or natural. Explain

Discussion

2135.	A saturated solution of iodine in water is 1.25×10−3 (M). In any saturated solution of I2, concentration of I2 is 1.25×10−3 (M). In 1 L of 0.1 (M) solution of I−, it is seen maximum 51.25×10−3 mole of I2 can be dissolved. In the aqueous solution, I−(aq), I2(aq) undergo complex formation,What is the value of KC?
Answer» A saturated solution of iodine in water is $1.25 \times 10^{- 3} (M)$ . In any saturated solution of $I_{2}$ , concentration of $I_{2}$ is $1.25 \times 10^{- 3} (M)$ . In $1 L$ of $0.1 (M)$ solution of $I^{-}$ , it is seen maximum $51.25 \times 10^{- 3} mole$ of $I_{2}$ can be dissolved. In the aqueous solution, $I^{-} (a q), I_{2} (a q)$ undergo complex formation, What is the value of $K_{C}$ ?

Discussion

2136.	Describe the different zones of a candle flame.
Answer» Describe the different zones of a candle flame.

Discussion

2137.	Among the options given below, which of the following exhibit tyndall effect?(i) Sunlight passing through clouds (ii) Milk in a glass (iii) Sunlight coming in through windows
Answer» Among the options given below, which of the following exhibit tyndall effect? (i) Sunlight passing through clouds (ii) Milk in a glass (iii) Sunlight coming in through windows

Discussion

2138.	Complete the correlation by identifying the correct option at the place of A? I: Silk: Silkworm II: Wool: A
Answer» Complete the correlation by identifying the correct option at the place of A? I: Silk: Silkworm II: Wool: A

2138.

Complete the correlation by identifying the correct option at the place of A? I: Silk: Silkworm II: Wool: A

Answer»

Complete the correlation by identifying the correct option at the place of A?

I: Silk: Silkworm

II: Wool: A

Discussion

2139.	A substance capable of dissolving other substances is called a ___ .
Answer» A substance capable of dissolving other substances is called a ___ .

Discussion

2140.	What happens to the solar energy absorbed in water?
Answer» What happens to the solar energy absorbed in water?

Discussion

2141.	THREE EQUAL WEIGHT OF MASS 2 KG EACH ARE HANGING ON A STRING PASSING OVER A FIXED FRICTIONSLESS PULLEY. THE TENSION IN STRING AB NEARLY
Answer» THREE EQUAL WEIGHT OF MASS 2 KG EACH ARE HANGING ON A STRING PASSING OVER A FIXED FRICTIONSLESS PULLEY. THE TENSION IN STRING AB NEARLY

Discussion

2142.	Classify the following oxides into three types and name the types.CaO, MgO, CO2 , SO3 , Na2O, ZnO, Al2O3 , Fe2O3
Answer» Classify the following oxides into three types and name the types. CaO, MgO, CO₂ , SO₃, Na₂O, ZnO, Al₂O₃ , Fe₂O₃

Discussion

2143.	Give two main reasons why do we need to harness non-conventional sources of energy? [2 MARKS]
Answer» Give two main reasons why do we need to harness non-conventional sources of energy? [2 MARKS]

Discussion

2144.	129.When some particles projected with the same velocity perpendicular to a magnetic field ,then which particle have minimum frequency of revolution (1) Li+ (2) He+ (3) Proton (4) Electron
Answer» 129.When some particles projected with the same velocity perpendicular to a magnetic field ,then which particle have minimum frequency of revolution (1) Li+ (2) He+ (3) Proton (4) Electron

Discussion

2145.	19. How to consider which is oxide and peroxide from the given structures
Answer» 19. How to consider which is oxide and peroxide from the given structures

Discussion

2146.	Why electron gain enthalpy of alkali metals is negative but it should be positive because it has tendency to lose electrons not gain
Answer» Why electron gain enthalpy of alkali metals is negative but it should be positive because it has tendency to lose electrons not gain

Discussion

2147.	Do Mercury liberate hydrogen (gas) on reaction with dilute acid ?
Answer» Do Mercury liberate hydrogen (gas) on reaction with dilute acid ?

Discussion

2148.	Which of the following statements are correct regarding energy?
Answer» Which of the following statements are correct regarding energy?

Discussion

2149.	Try to break a piece of chalk, a piece of charcoal and a piece of iron.In which of the above three substances would you find the force of attraction between the particles to be highest?
Answer» Try to break a piece of chalk, a piece of charcoal and a piece of iron. In which of the above three substances would you find the force of attraction between the particles to be highest?

Discussion

2150.	___ is a strong and elastic fibre that is used to make ropes for rock climbing.
Answer» ___ is a strong and elastic fibre that is used to make ropes for rock climbing.

Discussion

Explore topic-wise InterviewSolutions in .

What is the work done in an open vessel at 300K , when 112g iron reacts with dilute HCl?

In a test, Rashi has to write the chemical equation for the formation of Hydrochloric acid. She wrote H2(g)+2Cl(g)→2 HCl(g) The teacher marked the answer wrong. Why is it so?

No. Of structures possible for a compound with molecular formulaC5H10 i.8 ii.10 iii.6 iv. 4

Among the following the least thermally stable is-

Write the chemical formulae of the following. (a) Hydrogen sulphide (b) Aluminium oxide (c) Sodium nitrate

Find theodd one out from the following:(a) Chair,Bed, Table, Baby, Cupboard(b) Rose,Jasmine, Boat, Marigold, Lotus(c) Aluminium,Iron, Copper, Silver, Sand(d) Sugar,Salt, Sand, Copper sulphate

Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from the synthetic material? Advise Rana, giving your reason.

Electricity generated from fossil fuels such as coal and crude oil to run the industries leads to high concentrations of harmful gases in the atmosphere. This causes ozone layer depletion and global warming. What do coal and oil have in it that releases as oxides into the atmosphere?

Round off 0.1525 upto two significant figures

What is the difference between combination reaction redox and intermolecular redox?

Of the two which one is better - coke or coal ? why ?

Why there is no rise in water level, when sugar is added to water?

Maximum metals are obtained in the state of

Is air made up of matter?

Difference between crystal lattice and crystalline solid?

Explain the statement "RS and SR are optically active enantiomers if at least one group is different".

The metal oxides are:

A student took a beaker and mixed ink and water in it. Will he be able to separate ink and water using decantation process? Explain it. When can we use decantation?

___ is used in the preparation of washing soda, baking powder and urea.

1. Define:- with some examples:- a. Displacement reaction. b. Ductility. c. Sonorous . d. Metalloids.

Write any two chemical properties of acids. [3 MARKS]

Question 10A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?

Valency

While researching on various air pollutants, a scholar Ravi came across gas 'X'. He concluded that 'X' is a poisonous gas and has a strong smell of rotten eggs. Which among the following can be the gas 'X'?

Explain the different states of matter with examples.

the degree of hardness of a given sample of hard water is 40 ppm. If the entire hardness is due to MgSO4, find amount of MgSO4 present per kg of water

18. A conducting bubble of radius a, thickness t has potential v. Now the bubble collapses into a droplet. Find the potential of droplet.

Question 23Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is 24g mol−1.

Does titanium lies below the platinum in the reactivity series of metals?

The given diagram shows the structure of atom with 10 protons and 10 neutrons. Electrons are in their respective shells and the electronic configuration is 2,8. Which element does the diagram represent?

Question 1Specify the charge carried by anions? What happens to an atom ‘A’ if its atom gains two electrons?

A farmer has sown seeds in his field, after sometime the seeds have grown into a crop. What kind of change is growing of seeds into a crop, is it man made or natural. Explain

Describe the different zones of a candle flame.

Among the options given below, which of the following exhibit tyndall effect?(i) Sunlight passing through clouds (ii) Milk in a glass (iii) Sunlight coming in through windows

Complete the correlation by identifying the correct option at the place of A? I: Silk: Silkworm II: Wool: A

A substance capable of dissolving other substances is called a ___ .

What happens to the solar energy absorbed in water?

THREE EQUAL WEIGHT OF MASS 2 KG EACH ARE HANGING ON A STRING PASSING OVER A FIXED FRICTIONSLESS PULLEY. THE TENSION IN STRING AB NEARLY

Classify the following oxides into three types and name the types.CaO, MgO, CO2 , SO3 , Na2O, ZnO, Al2O3 , Fe2O3

Give two main reasons why do we need to harness non-conventional sources of energy? [2 MARKS]

129.When some particles projected with the same velocity perpendicular to a magnetic field ,then which particle have minimum frequency of revolution (1) Li+ (2) He+ (3) Proton (4) Electron

19. How to consider which is oxide and peroxide from the given structures

Why electron gain enthalpy of alkali metals is negative but it should be positive because it has tendency to lose electrons not gain

Do Mercury liberate hydrogen (gas) on reaction with dilute acid ?

Which of the following statements are correct regarding energy?

Try to break a piece of chalk, a piece of charcoal and a piece of iron.In which of the above three substances would you find the force of attraction between the particles to be highest?

___ is a strong and elastic fibre that is used to make ropes for rock climbing.