7248 + Interview Questions in Chemistry Page 11 InterviewSolution

501.	WHAT IS THE DIFFERENCE BETWEEN SOLID , LIQUID AND GAS
Answer» WHAT IS THE DIFFERENCE BETWEEN SOLID , LIQUID AND GAS

Discussion

502.	A solution is prepared by dissolving 10 g of salt in 100 g of water. Calculate the mass percentage of the solution.9.09
Answer» A solution is prepared by dissolving 10 g of salt in 100 g of water. Calculate the mass percentage of the solution. 9.09

Discussion

503.	The concentration of a solution is directly related to
Answer» The concentration of a solution is directly related to

Discussion

504.	Two or more metals combine together to form an alloy which is a/an ____.
Answer» Two or more metals combine together to form an alloy which is a/an ____.

Discussion

505.	Natural gas is used in the manufacture of:
Answer» Natural gas is used in the manufacture of:

Discussion

506.	Mark ‘True’ if the statement is true and ‘False’ if it is false.(a) Generally, non-metals react with acids.(b) Sodium is a very reactive metal.(c) Copper displaces zinc from zinc sulphate solution. (d) Coal can be drawn into wires.
Answer» Mark ‘True’ if the statement is true and ‘False’ if it is false. (a) Generally, non-metals react with acids.(b) Sodium is a very reactive metal. (c) Copper displaces zinc from zinc sulphate solution. (d) Coal can be drawn into wires.

Discussion

507.	what happens to a substance initial temperature when we put water to on burning substance
Answer» what happens to a substance initial temperature when we put water to on burning substance

Discussion

508.	During a race, you are accelerating on a leveled track and acquire a velocity three times your initial velocity. What is the change in your potential energy?
Answer» During a race, you are accelerating on a leveled track and acquire a velocity three times your initial velocity. What is the change in your potential energy?

Discussion

509.	What happens when we react steel wool and oxygen?
Answer» What happens when we react steel wool and oxygen?

Discussion

510.	What is the main precaution that one has to take during the electrolysis of water?
Answer» What is the main precaution that one has to take during the electrolysis of water?

Discussion

511.	What is the empirical formula of Glucose?
Answer» What is the empirical formula of Glucose?

Discussion

512.	Balance the equation in acidic medium {H_2S+Fe^{3+→ Fe^{2++S+H^+
Answer» Balance the equation in acidic medium {H_2S+Fe^{3+→ Fe^{2++S+H^+

Discussion

513.	Number of atoms present in 1 mole of NH24(2) N atomsA(1) 4 atomsNA(4)atoms(3) 4N, atomsA
Answer» Number of atoms present in 1 mole of NH24(2) N atomsA(1) 4 atomsNA(4)atoms(3) 4N, atomsA

Discussion

514.	Name the major component of natural gas.
Answer» Name the major component of natural gas.

Discussion

515.	If an ion of mass number 8 is projected to a metalfoil of mass number 64 so that at the distance ofclosest approach their nuclei just touch eachother. If the nuclear radius of projectile ion is 2rthen the distance of closest approach is(2) 4ro(4) 8r(3) 6r
Answer» If an ion of mass number 8 is projected to a metalfoil of mass number 64 so that at the distance ofclosest approach their nuclei just touch eachother. If the nuclear radius of projectile ion is 2rthen the distance of closest approach is(2) 4ro(4) 8r(3) 6r

Discussion

516.	What type of plastic is used for making grocery bags and packaging of foods and bread?
Answer» What type of plastic is used for making grocery bags and packaging of foods and bread?

Discussion

517.	Hexane→Butene+Ethane The given reaction is an example of
Answer» $H e x a n e \to B u t e n e + E t h a n e$ The given reaction is an example of

517.

Hexane→Butene+Ethane The given reaction is an example of

Answer»

$H e x a n e \to B u t e n e + E t h a n e$

The given reaction is an example of

Discussion

518.	Question 37What are the by-products of fertilizer industries? How do they affect the environment?
Answer» Question 37 What are the by-products of fertilizer industries? How do they affect the environment?

Discussion

519.	the volume of carbon dioxide gas evolved at STP by heating 7.3 grams Mg(HCO3)2will be = ?
Answer» the volume of carbon dioxide gas evolved at STP by heating 7.3 grams Mg(HCO3)2will be = ?

Discussion

520.	Question 6.1Balance the following chemical equation:HNO3+Ca(OH)2→Ca(NO3)2+H2O
Answer» Question 6.1 Balance the following chemical equation: ${HNO}_{3} + {Ca(OH)}_{2} \to {Ca(NO}_{3})_{2} + H_{2} O$

Discussion

521.	number of electrons in 3.6 grams of H2O are
Answer» number of electrons in 3.6 grams of H2O are

Discussion

522.	Time taken for an electrons to complete one revolution in Bohr orbit of hydrogen atom.
Answer» Time taken for an electrons to complete one revolution in Bohr orbit of hydrogen atom.

Discussion

523.	In what way is Rutherford's atomic model different from that of Thomson's atomic model for an atom?
Answer» In what way is Rutherford's atomic model different from that of Thomson's atomic model for an atom?

Discussion

524.	If an atom of an element has 34 electrons in total, then which orbit is the outermost orbit of the atom and how many valence electrons it contains?
Answer» If an atom of an element has 34 electrons in total, then which orbit is the outermost orbit of the atom and how many valence electrons it contains?

Discussion

525.	Which of the following has a component that must be soluble?
Answer» Which of the following has a component that must be soluble?

Discussion

526.	how to find molecule of a compound
Answer» how to find molecule of a compound

Discussion

527.	While working in a chemistry laboratory, a student took some zinc granules in a test-tube and added a liquid X to it. A gas Y was produced. When a burning matchstick was brought near the mouth of the test-tube, the gas Y burns with a 'pop' sound, making a little explosion.(a) What could the liquid X be?(b) Name the gas Y.(c) State two properties of gas Y.
Answer» While working in a chemistry laboratory, a student took some zinc granules in a test-tube and added a liquid X to it. A gas Y was produced. When a burning matchstick was brought near the mouth of the test-tube, the gas Y burns with a 'pop' sound, making a little explosion. (a) What could the liquid X be? (b) Name the gas Y. (c) State two properties of gas Y.

Discussion

528.	The word "polymer" means -
Answer» The word "polymer" means -

Discussion

529.	{ K _ { 4 } [ Fe ( CN ) _ { 6 } ] → K _ { 3 } [ Fe ( CN ) _ { 6 } ] †ext { is half reaction depicting } } { †ext { Options: } } { †ext { Oxidation } } { †ext { Reduction } } { †ext { Neduction } } { †ext { X Both oxidation and reduction }
Answer» { K _ { 4 } [ Fe ( CN ) _ { 6 } ] → K _ { 3 } [ Fe ( CN ) _ { 6 } ] †ext { is half reaction depicting } } { †ext { Options: } } { †ext { Oxidation } } { †ext { Reduction } } { †ext { Neduction } } { †ext { X Both oxidation and reduction }

Discussion

530.	Can a solid turn into gas?
Answer» Can a solid turn into gas?

Discussion

531.	in 3l container,3.094g of o2 is collected over water.Pressure of moist water at 27 degree celcius\lbrack vapour pressure of water is 27mm at 27 degree celcius and volume of water is negligable\rbrack
Answer» in 3l container,3.094g of o2 is collected over water.Pressure of moist water at 27 degree celcius\lbrack vapour pressure of water is 27mm at 27 degree celcius and volume of water is negligable\rbrack

Discussion

532.	Explain the following with their properties and uses: Sodium chloride Sodium bicarbonate Bleaching powder
Answer» Explain the following with their properties and uses: Sodium chloride Sodium bicarbonate Bleaching powder

532.

Explain the following with their properties and uses: Sodium chloride Sodium bicarbonate Bleaching powder

Answer»

Explain the following with their properties and uses:

Sodium chloride

Sodium bicarbonate

Bleaching powder

Discussion

533.	What is decantation?
Answer» What is decantation?

Discussion

534.	A particle is released from a 45 m high building.find the time taken to reach near the ground and also find the time at half height?
Answer» A particle is released from a 45 m high building.find the time taken to reach near the ground and also find the time at half height?

Discussion

535.	Which of the following is called a noble metal?
Answer» Which of the following is called a noble metal?

Discussion

536.	What happens when Bases react with non-metal oxides?
Answer» What happens when Bases react with non-metal oxides?

Discussion

537.	What happens on heating anhydrous copper sulphate
Answer» What happens on heating anhydrous copper sulphate

Discussion

538.	15. How long should water be electrolyzed by paying through 100 amperes current so that oxygen released can completely burn 27.66 g of diborane? A)6.4 hours B)0.8 C) 3.2 D) 1.6
Answer» 15. How long should water be electrolyzed by paying through 100 amperes current so that oxygen released can completely burn 27.66 g of diborane? A)6.4 hours B)0.8 C) 3.2 D) 1.6

Discussion

539.	Producer gas contains mainly ___________.
Answer» Producer gas contains mainly ___________.

Discussion

540.	A particle weighs 120 N on the surface of the earth. At what height above the earth's surface will its weight be 30 N?Radius of the earth =6400 km
Answer» A particle weighs $120 N$ on the surface of the earth. At what height above the earth's surface will its weight be $30 N$ ? Radius of the earth $= 6400 km$

Discussion

541.	A student took three beakers and labelled them as A, B, and C. He added CuSO4solution and zinc granules to beaker A, while he added ZnSO4 solution and copper pieces to beaker B. In beaker C, he added FeSO4 solution and zinc granules. Select the beakers in which a reaction is expected to be observed.
Answer» A student took three beakers and labelled them as A, B, and C. He added $C u S O_{4}$ solution and zinc granules to beaker A, while he added $Z n S O_{4}$ solution and copper pieces to beaker B. In beaker C, he added $F e S O_{4}$ solution and zinc granules. Select the beakers in which a reaction is expected to be observed.

Discussion

542.	What is deforestation? How is it caused?
Answer» What is deforestation? How is it caused?

Discussion

543.	Which of the following metals should be chosen to react with CuSO4 solution to make its colour change from blue to green?
Answer» Which of the following metals should be chosen to react with $C u S O_{4}$ solution to make its colour change from blue to green?

Discussion

544.	1 kg of mud water sample contains 0.2 g of arsenic. The concentration of arsenide ions in terms of ppm is200
Answer» 1 kg of mud water sample contains 0.2 g of arsenic. The concentration of arsenide ions in terms of ppm is 200

Discussion

545.	The solubility is always stated as:
Answer» The solubility is always stated as:

Discussion

546.	Maximum number of atoms are present in(1) 22.4 L O2 at S.T.P.(2) 10 g-atoms of oxygen(3) 8 moles of O3(4) 64 g of oxygen
Answer» Maximum number of atoms are present in (1) 22.4 L O2 at S.T.P. (2) 10 g-atoms of oxygen (3) 8 moles of O3 (4) 64 g of oxygen

Discussion

547.	A thin paper cup filled with water does not catch fire when placed over a flame. This is because
Answer» A thin paper cup filled with water does not catch fire when placed over a flame. This is because

Discussion

548.	Thiokol rhermoplastic or thermosetting plastic?
Answer» Thiokol rhermoplastic or thermosetting plastic?

Discussion

549.	The melting point of gallium is 30∘C. Then its freezing point will be ____∘C.30
Answer» The melting point of gallium is $30^{\circ} C$ . Then its freezing point will be ____ $^{\circ} C$ . 30

Discussion

550.	Question 3 (d)Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).d. What is the effect of change of temperature on the solubility of a salt?
Answer» Question 3 (d) Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). d. What is the effect of change of temperature on the solubility of a salt?

Discussion

Explore topic-wise InterviewSolutions in .

WHAT IS THE DIFFERENCE BETWEEN SOLID , LIQUID AND GAS

A solution is prepared by dissolving 10 g of salt in 100 g of water. Calculate the mass percentage of the solution.9.09

The concentration of a solution is directly related to

Two or more metals combine together to form an alloy which is a/an ____.

Natural gas is used in the manufacture of:

Mark ‘True’ if the statement is true and ‘False’ if it is false.​(a) Generally, non-metals react with acids.​(b) Sodium is a very reactive metal.(c) Copper displaces zinc from zinc sulphate solution. (d) Coal can be drawn into wires.

what happens to a substance initial temperature when we put water to on burning substance

During a race, you are accelerating on a leveled track and acquire a velocity three times your initial velocity. What is the change in your potential energy?

What happens when we react steel wool and oxygen?

What is the main precaution that one has to take during the electrolysis of water?

What is the empirical formula of Glucose?

Balance the equation in acidic medium {H_2S+Fe^{3+→ Fe^{2++S+H^+

Number of atoms present in 1 mole of NH24(2) N atomsA(1) 4 atomsNA(4)atoms(3) 4N, atomsA

Name the major component of natural gas.

If an ion of mass number 8 is projected to a metalfoil of mass number 64 so that at the distance ofclosest approach their nuclei just touch eachother. If the nuclear radius of projectile ion is 2rthen the distance of closest approach is(2) 4ro(4) 8r(3) 6r

What type of plastic is used for making grocery bags and packaging of foods and bread?

Hexane→Butene+Ethane The given reaction is an example of

Question 37What are the by-products of fertilizer industries? How do they affect the environment?

the volume of carbon dioxide gas evolved at STP by heating 7.3 grams Mg(HCO3)2will be = ?

Question 6.1Balance the following chemical equation:HNO3+Ca(OH)2→Ca(NO3)2+H2O

number of electrons in 3.6 grams of H2O are

Time taken for an electrons to complete one revolution in Bohr orbit of hydrogen atom.

In what way is Rutherford's atomic model different from that of Thomson's atomic model for an atom?

If an atom of an element has 34 electrons in total, then which orbit is the outermost orbit of the atom and how many valence electrons it contains?

Which of the following has a component that must be soluble?

how to find molecule of a compound

The word "polymer" means -

{ K _ { 4 } [ Fe ( CN ) _ { 6 } ] → K _ { 3 } [ Fe ( CN ) _ { 6 } ] †ext { is half reaction depicting } } { †ext { Options: } } { †ext { Oxidation } } { †ext { Reduction } } { †ext { Neduction } } { †ext { X Both oxidation and reduction }

Can a solid turn into gas?

in 3l container,3.094g of o2 is collected over water.Pressure of moist water at 27 degree celcius\lbrack vapour pressure of water is 27mm at 27 degree celcius and volume of water is negligable\rbrack

Explain the following with their properties and uses: Sodium chloride Sodium bicarbonate Bleaching powder

What is decantation?

A particle is released from a 45 m high building.find the time taken to reach near the ground and also find the time at half height?

Which of the following is called a noble metal?

What happens when Bases react with non-metal oxides?

What happens on heating anhydrous copper sulphate

15. How long should water be electrolyzed by paying through 100 amperes current so that oxygen released can completely burn 27.66 g of diborane? A)6.4 hours B)0.8 C) 3.2 D) 1.6

Producer gas contains mainly ___________.

A particle weighs 120 N on the surface of the earth. At what height above the earth's surface will its weight be 30 N?Radius of the earth =6400 km

What is deforestation? How is it caused?

Which of the following metals should be chosen to react with CuSO4 solution to make its colour change from blue to green?

1 kg of mud water sample contains 0.2 g of arsenic. The concentration of arsenide ions in terms of ppm is200

The solubility is always stated as:

Maximum number of atoms are present in(1) 22.4 L O2 at S.T.P.(2) 10 g-atoms of oxygen(3) 8 moles of O3(4) 64 g of oxygen

A thin paper cup filled with water does not catch fire when placed over a flame. This is because

Thiokol rhermoplastic or thermosetting plastic?

The melting point of gallium is 30∘C. Then its freezing point will be ____∘C.30

Mark ‘True’ if the statement is true and ‘False’ if it is false.(a) Generally, non-metals react with acids.(b) Sodium is a very reactive metal.(c) Copper displaces zinc from zinc sulphate solution. (d) Coal can be drawn into wires.