10223 + Interview Questions in Chemistry Page 196 InterviewSolution

9751.	Ammonia and hydrogen chloride gases are both payment smelling in nature These are released from the two corner of room.Which gas will reach a person sitting in the centre of the room?
Answer» Ammonia and hydrogen chloride gases are both payment smelling in nature These are released from the two corner of room.Which gas will reach a person sitting in the centre of the room?

Discussion

9752.	Mention the properties of solid
Answer» Mention the properties of solid

Discussion

9753.	The maximum number of electrons that can be accommodated in L shell are..................
Answer» The maximum number of electrons that can be accommodated in L shell are..................

Discussion

9754.	Why is light not considered a matter
Answer» Why is light not considered a matter

Discussion

9755.	Identify the properties that directly depend on the electronic configuration of an atom.
Answer» Identify the properties that directly depend on the electronic configuration of an atom.

Discussion

9756.	An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Answer» An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.

Discussion

9757.	During Rutherford's experiment some of the alpha-particles were deflected by the foil by small angles. What does this prove?
Answer» During Rutherford's experiment some of the alpha-particles were deflected by the foil by small angles. What does this prove?

Discussion

9758.	Why do we sweat more on a humid day?
Answer» Why do we sweat more on a humid day?

Discussion

9759.	Which one of the following electronic configurations depict an oxygen atom?
Answer» Which one of the following electronic configurations depict an oxygen atom?

Discussion

9760.	When the density of air is compared with that of hydrogen chloride, the density of hydrogen chloride is ________ to air.
Answer» When the density of air is compared with that of hydrogen chloride, the density of hydrogen chloride is ________ to air.

Discussion

9761.	Name the mixture whose particles are large enough to scatter light.
Answer» Name the mixture whose particles are large enough to scatter light.

Discussion

9762.	Charge to the Mass ratio of ___ rays varies for different gasses whereas is ___ for ___ rays.
Answer» Charge to the Mass ratio of ___ rays varies for different gasses whereas is ___ for ___ rays.

Discussion

9763.	Explain why: (a) Boiled or distilled water taste flat. (b) Ice at 0∘C. has the greater cooling effect than water at 0∘C. (c) Burns caused by steam are more severe than burns caused by boiling water. (d) Rainwater does not leave behind concentric rings when boiled. (e) Air dissolved in water contains a higher proportion of oxygen. (f) If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
Answer» Explain why: (a) Boiled or distilled water taste flat. (b) Ice at $0^{\circ} C .$ has the greater cooling effect than water at $0^{\circ} C .$ (c) Burns caused by steam are more severe than burns caused by boiling water. (d) Rainwater does not leave behind concentric rings when boiled. (e) Air dissolved in water contains a higher proportion of oxygen. (f) If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.

9763.

Explain why: (a) Boiled or distilled water taste flat. (b) Ice at 0∘C. has the greater cooling effect than water at 0∘C. (c) Burns caused by steam are more severe than burns caused by boiling water. (d) Rainwater does not leave behind concentric rings when boiled. (e) Air dissolved in water contains a higher proportion of oxygen. (f) If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.

Answer»

Explain why:

(a) Boiled or distilled water taste flat.

(b) Ice at $0^{\circ} C .$ has the greater cooling effect than water at $0^{\circ} C .$

(c) Burns caused by steam are more severe than burns caused by boiling water.

(d) Rainwater does not leave behind concentric rings when boiled.

(e) Air dissolved in water contains a higher proportion of oxygen.

(f) If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.

Discussion

9764.	Question 19 Complete the following table. Atomic numberMass numberNumber of neutronsNumber of protonsNumber of electronsName of the atomic species9−10−−−1632−−−Sulphur−24−12−−−2−1−−−1010−
Answer» Question 19 Complete the following table. $\begin{matrix} A t o m i c n u m b e r & M a s s n u m b e r & N u m b e r o f n e u t r o n s & N u m b e r o f p r o t o n s & N u m b e r o f e l e c t r o n s & N a m e o f t h e a t o m i c s p e c i e s 9 & - & 10 & - & - & - 16 & 32 & - & - & - & S u l p h u r - & 24 & - & 12 & - & - - & 2 & - & 1 & - & - - & 1 & 0 & 1 & 0 & - \end{matrix}$

Discussion

9765.	Which state of matter has definite volume but no fixed shape?
Answer» Which state of matter has definite volume but no fixed shape?

Discussion

9766.	An ideal Gas at 1 bar is heated from 0∘ C to 373 K, keeping the pressure constant. If its initial volume is 5.46L, the final volume would be
Answer» An ideal Gas at 1 bar is heated from $0^{\circ} C$ to $373 K$ , keeping the pressure constant. If its initial volume is 5.46L, the final volume would be

Discussion

9767.	Student as a piece of copper sulphate sul student as a piece of copper sulphate Crystal explain the method of calculating the number of Cu Crystal explain the method of calculating the number of Cu SO4 Molecule in that Crystal ( given atomic mass copper is equal to 63 sulphur is equal to 32 and oxygen is equal to 16
Answer» Student as a piece of copper sulphate sul student as a piece of copper sulphate Crystal explain the method of calculating the number of Cu Crystal explain the method of calculating the number of Cu SO4 Molecule in that Crystal ( given atomic mass copper is equal to 63 sulphur is equal to 32 and oxygen is equal to 16

Discussion

9768.	Is a chemical reaction a creation or combination?
Answer» Is a chemical reaction a creation or combination?

Discussion

9769.	Name the isotsopes of hydrogen
Answer» Name the isotsopes of hydrogen

Discussion

9770.	Match the following catalysts with the process in which they are used: (a) Vanadium Pentoxide (b) Amylase (c) Iron (d) Phosphoric acid (i) Biological processes (ii) Manufacture of Sulphuric acid (iii) Manufacture of Ammonia (iv) Reduce the decomposition of Hydrogen Peroxide
Answer» Match the following catalysts with the process in which they are used: (a) Vanadium Pentoxide (b) Amylase (c) Iron (d) Phosphoric acid (i) Biological processes (ii) Manufacture of Sulphuric acid (iii) Manufacture of Ammonia (iv) Reduce the decomposition of Hydrogen Peroxide

9770.

Match the following catalysts with the process in which they are used: (a) Vanadium Pentoxide (b) Amylase (c) Iron (d) Phosphoric acid (i) Biological processes (ii) Manufacture of Sulphuric acid (iii) Manufacture of Ammonia (iv) Reduce the decomposition of Hydrogen Peroxide

Answer»

Match the following catalysts with the process in which they are used:

(a) Vanadium Pentoxide (b) Amylase (c) Iron (d) Phosphoric acid

(i) Biological processes (ii) Manufacture of Sulphuric acid (iii) Manufacture of Ammonia (iv) Reduce the decomposition of Hydrogen Peroxide

Discussion

9771.	Which of the following are the properties of a solution?
Answer» Which of the following are the properties of a solution?

Discussion

9772.	Which isotope of carbon is isobaric with naturally occurring oxygen element?
Answer» Which isotope of carbon is isobaric with naturally occurring oxygen element?

Discussion

9773.	Which of the following chemical reactions is an example of a combination reaction?A.Ca(s)+2HCl(aq)⟶CaCl2(aq)+H2(g)B. 2KClO3(s)⟶2KCl(s)+3O2(g)C.2H2O2(l)⟶2H2(g)+O2(g)D. 2S(s)+3O2(g)⟶2SO3(g)
Answer» Which of the following chemical reactions is an example of a combination reaction? A. $C a (s) + 2 H C l (a q) ⟶ C a C l_{2} (a q) + H_{2} (g)$ B. $2 K C l O_{3} (s) ⟶ 2 K C l (s) + 3 O_{2} (g)$ C. $2 H_{2} O_{2} (l) ⟶ 2 H_{2} (g) + O_{2} (g)$ D. $2 S (s) + 3 O_{2} (g) ⟶ 2 S O_{3} (g)$

Discussion

9774.	Oxidation of which of the following by air in presence of vanadium pentoxide gives phenol
Answer» Oxidation of which of the following by air in presence of vanadium pentoxide gives phenol

Discussion

9775.	Why is heat energy needed to melt a solid? What is this heat energy called?
Answer» Why is heat energy needed to melt a solid? What is this heat energy called?

Discussion

9776.	Rutherford's alpha particle scattering experiment led to the discovery of:
Answer» Rutherford's alpha particle scattering experiment led to the discovery of:

Discussion

9777.	What is the speed of light in air and in the vacuum?
Answer» What is the speed of light in air and in the vacuum?

Discussion

9778.	Question 113(ii) Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. e.g. If you apply sunscreen with SPF 15, you get one minute of UV rays for every 15 minutes you stay in the sun. - Suppose, a sunscreen allows 25% of the sun's UV rays. (a) What fraction of UV rays does this sunscreen block? Give your answer in lowest terms. (b) Use your answer from part (a) calculate this sunscreen's SPF. Explain how you found your answer?
Answer» Question 113(ii) Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. e.g. If you apply sunscreen with SPF 15, you get one minute of UV rays for every 15 minutes you stay in the sun. - Suppose, a sunscreen allows 25% of the sun's UV rays. (a) What fraction of UV rays does this sunscreen block? Give your answer in lowest terms. (b) Use your answer from part (a) calculate this sunscreen's SPF. Explain how you found your answer?

9778.

Question 113(ii) Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. e.g. If you apply sunscreen with SPF 15, you get one minute of UV rays for every 15 minutes you stay in the sun. - Suppose, a sunscreen allows 25% of the sun's UV rays. (a) What fraction of UV rays does this sunscreen block? Give your answer in lowest terms. (b) Use your answer from part (a) calculate this sunscreen's SPF. Explain how you found your answer?

Answer»

Question 113(ii)

Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. e.g. If you apply sunscreen with SPF 15, you get one minute of UV rays for every 15 minutes you stay in the sun.
- Suppose, a sunscreen allows 25% of the sun's UV rays.
(a) What fraction of UV rays does this sunscreen block? Give your answer in lowest terms.
(b) Use your answer from part (a) calculate this sunscreen's SPF. Explain how you found your answer?

Discussion

9779.	Which of the following molecules has a triple covalent bond between the atoms?
Answer» Which of the following molecules has a triple covalent bond between the atoms?

Discussion

9780.	The electronic configuration of an element with atomic number (Z = 11) is 1s2, 2s2, 2p6, 3s1. The symbol of the element is:
Answer» The electronic configuration of an element with atomic number (Z = 11) is 1s², 2s², 2p⁶, 3s¹. The symbol of the element is:

Discussion

9781.	Which of the following subatomic particles has no charge but mass nearly equal to that of a proton?
Answer» Which of the following subatomic particles has no charge but mass nearly equal to that of a proton?

Discussion

9782.	Newton's law of cooling is a special case of
Answer» Newton's law of cooling is a special case of

Discussion

9783.	How is the size of an atom indicated?
Answer» How is the size of an atom indicated?

Discussion

9784.	A solid of density 5000 kg/m^3 weighs 0.5 kgf in air. It is completely immersed in water of density 1000 kg/m^3. Calculate the apparent weight of the solid in water.
Answer» A solid of density 5000 kg/m^3 weighs 0.5 kgf in air. It is completely immersed in water of density 1000 kg/m^3. Calculate the apparent weight of the solid in water.

Discussion

9785.	How to find First IE if carbon in kj/mol
Answer» How to find First IE if carbon in kj/mol

Discussion

9786.	Why are the following metals not used in the lab. preparation of hydrogen ? (a) calcium (b) iron (c) aluminium (d) sodium
Answer» Why are the following metals not used in the lab. preparation of hydrogen ? (a) calcium (b) iron (c) aluminium (d) sodium

9786.

Why are the following metals not used in the lab. preparation of hydrogen ? (a) calcium (b) iron (c) aluminium (d) sodium

Answer»

Why are the following metals not used in the lab. preparation of hydrogen ?

(a) calcium (b) iron (c) aluminium (d) sodium

Discussion

9787.	Properties of solid, liquid , gas
Answer» Properties of solid, liquid , gas

Discussion

9788.	Plants cannot directly take in nitrogen from the atmosphere. How do they do it?
Answer» Plants cannot directly take in nitrogen from the atmosphere. How do they do it?

Discussion

9789.	Arrange the following in decreasing percentage of freshwater contained in them: groundwater, frozen form (glaciers and polar ice caps), rivers, atmosphere.
Answer» Arrange the following in decreasing percentage of freshwater contained in them: groundwater, frozen form (glaciers and polar ice caps), rivers, atmosphere.

Discussion

9790.	What is the trend of ionization energy on going from Sn to Pb?
Answer» What is the trend of ionization energy on going from Sn to Pb?

Discussion

9791.	Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature. (True/False). Justify your answer.
Answer» Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature. (True/False). Justify your answer.

Discussion

9792.	When we tear paper does it's particles also get separated into two?
Answer» When we tear paper does it's particles also get separated into two?

Discussion

9793.	A gas cylinder has walls that can bear a maximum pressure of 1.0×106 Pa. It contains a gas at 8.0×105 Pa and 300 K. The cylinder is steadily heated. Neglecting any change in the volume, calculate the temperature at which the cylinder will break.
Answer» A gas cylinder has walls that can bear a maximum pressure of $1.0 \times 10^{6}$ Pa. It contains a gas at $8.0 \times 10^{5}$ Pa and 300 K. The cylinder is steadily heated. Neglecting any change in the volume, calculate the temperature at which the cylinder will break.

Discussion

9794.	What are the features of nuclear model of an atom as proposed by Rutherford?
Answer» What are the features of nuclear model of an atom as proposed by Rutherford?

Discussion

9795.	Question 01. What happens when a solution of an acid is mixed with a solution of a base in a test tube ? (i) The temperature of the solution increases. (ii) The temperature of the solution decreases. (iii) The temperature of the solution remains the same. (iv) Salt formation takes place. (i) only (i) and (iii) (ii) and (iii) (i) and (iv)
Answer» Question 01. What happens when a solution of an acid is mixed with a solution of a base in a test tube ? (i) The temperature of the solution increases. (ii) The temperature of the solution decreases. (iii) The temperature of the solution remains the same. (iv) Salt formation takes place. (i) only (i) and (iii) (ii) and (iii) (i) and (iv)

9795.

Question 01. What happens when a solution of an acid is mixed with a solution of a base in a test tube ? (i) The temperature of the solution increases. (ii) The temperature of the solution decreases. (iii) The temperature of the solution remains the same. (iv) Salt formation takes place. (i) only (i) and (iii) (ii) and (iii) (i) and (iv)

Answer»

Question 01.
What happens when a solution of an acid is mixed with a solution of a base in a test tube ?
(i) The temperature of the solution increases.
(ii) The temperature of the solution decreases.
(iii) The temperature of the solution remains the same.
(iv) Salt formation takes place.

(i) only
(i) and (iii)
(ii) and (iii)
(i) and (iv)

Discussion

9796.	Question 7 Choose the correct statement of the following (a) conversion of solid into vapours without passing through the liquid state is called vapourisation. (b) conversion of vapours into solid without passing through the liquid state is called deposition. (c) conversion of vapours into solid without passing through the liquid state is called freezing. (d) conversion of solid into liquid is called sublimation.
Answer» Question 7 Choose the correct statement of the following (a) conversion of solid into vapours without passing through the liquid state is called vapourisation. (b) conversion of vapours into solid without passing through the liquid state is called deposition. (c) conversion of vapours into solid without passing through the liquid state is called freezing. (d) conversion of solid into liquid is called sublimation.

Discussion

9797.	What is valence shell?
Answer» What is valence shell?

Discussion

9798.	Taj is damaged due to acid rain. This phenomenon is called___.
Answer» Taj is damaged due to acid rain. This phenomenon is called___.

Discussion

9799.	Name the elements represented by the following symbols: Hg, Pb, Au, Ag, Sn.
Answer» Name the elements represented by the following symbols: Hg, Pb, Au, Ag, Sn.

9799.

Name the elements represented by the following symbols: Hg, Pb, Au, Ag, Sn.

Answer»

Name the elements represented by the following symbols:

Hg, Pb, Au, Ag, Sn.

Discussion

9800.	We have four beakers containing the mixtures as shown. In which of the following beaker the constituents of the mixtures cannot be separated by magnetic separation.
Answer» We have four beakers containing the mixtures as shown. In which of the following beaker the constituents of the mixtures cannot be separated by magnetic separation.

9800.

We have four beakers containing the mixtures as shown. In which of the following beaker the constituents of the mixtures cannot be separated by magnetic separation.

Answer»

We have four beakers containing the mixtures as shown. In which of the following beaker the constituents of the mixtures cannot be separated by magnetic separation.

Discussion

Explore topic-wise InterviewSolutions in .

Ammonia and hydrogen chloride gases are both payment smelling in nature These are released from the two corner of room.Which gas will reach a person sitting in the centre of the room?

Mention the properties of solid

The maximum number of electrons that can be accommodated in L shell are..................

Why is light not considered a matter

Identify the properties that directly depend on the electronic configuration of an atom.

An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.

During Rutherford's experiment some of the alpha-particles were deflected by the foil by small angles. What does this prove?

Why do we sweat more on a humid day?

Which one of the following electronic configurations depict an oxygen atom?

When the density of air is compared with that of hydrogen chloride, the density of hydrogen chloride is ________ to air.

Name the mixture whose particles are large enough to scatter light.

Charge to the Mass ratio of ___ rays varies for different gasses whereas is ___ for ___ rays.

Question 19 Complete the following table. Atomic numberMass numberNumber of neutronsNumber of protonsNumber of electronsName of the atomic species9−10−−−1632−−−Sulphur−24−12−−−2−1−−−1010−

Which state of matter has definite volume but no fixed shape?

An ideal Gas at 1 bar is heated from 0∘ C to 373 K, keeping the pressure constant. If its initial volume is 5.46L, the final volume would be

Is a chemical reaction a creation or combination?

Name the isotsopes of hydrogen

Match the following catalysts with the process in which they are used: (a) Vanadium Pentoxide (b) Amylase (c) Iron (d) Phosphoric acid (i) Biological processes (ii) Manufacture of Sulphuric acid (iii) Manufacture of Ammonia (iv) Reduce the decomposition of Hydrogen Peroxide

Which of the following are the properties of a solution?

Which isotope of carbon is isobaric with naturally occurring oxygen element?

Which of the following chemical reactions is an example of a combination reaction?A.Ca(s)+2HCl(aq)⟶CaCl2(aq)+H2(g)B. 2KClO3(s)⟶2KCl(s)+3O2(g)C.2H2O2(l)⟶2H2(g)+O2(g)D. 2S(s)+3O2(g)⟶2SO3(g)

Oxidation of which of the following by air in presence of vanadium pentoxide gives phenol

Why is heat energy needed to melt a solid? What is this heat energy called?

Rutherford's alpha particle scattering experiment led to the discovery of:

What is the speed of light in air and in the vacuum?

Which of the following molecules has a triple covalent bond between the atoms?

The electronic configuration of an element with atomic number (Z = 11) is 1s2, 2s2, 2p6, 3s1. The symbol of the element is:

Which of the following subatomic particles has no charge but mass nearly equal to that of a proton?

Newton's law of cooling is a special case of

How is the size of an atom indicated?

A solid of density 5000 kg/m^3 weighs 0.5 kgf in air. It is completely immersed in water of density 1000 kg/m^3. Calculate the apparent weight of the solid in water.

How to find First IE if carbon in kj/mol

Why are the following metals not used in the lab. preparation of hydrogen ? (a) calcium (b) iron (c) aluminium (d) sodium

Properties of solid, liquid , gas

Plants cannot directly take in nitrogen from the atmosphere. How do they do it?

Arrange the following in decreasing percentage of freshwater contained in them: groundwater, frozen form (glaciers and polar ice caps), rivers, atmosphere.

What is the trend of ionization energy on going from Sn to Pb?

Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature. (True/False). Justify your answer.

When we tear paper does it's particles also get separated into two?

A gas cylinder has walls that can bear a maximum pressure of 1.0×106 Pa. It contains a gas at 8.0×105 Pa and 300 K. The cylinder is steadily heated. Neglecting any change in the volume, calculate the temperature at which the cylinder will break.

What are the features of nuclear model of an atom as proposed by Rutherford?

What is valence shell?

Taj is damaged due to acid rain. This phenomenon is called___.

Name the elements represented by the following symbols: Hg, Pb, Au, Ag, Sn.

We have four beakers containing the mixtures as shown. In which of the following beaker the constituents of the mixtures cannot be separated by magnetic separation.

Charge to the Mass ratio of _ rays varies for different gasses whereas is _ for ___ rays.