10223 + Interview Questions in Chemistry Page 165 InterviewSolution

8201.	Solid can be converted directly to gaseous state. This process is known as
Answer» Solid can be converted directly to gaseous state. This process is known as

Discussion

8202.	Calculate the molecular mass of the following. A. Chlorine gad B. Ammonia gas C. Sulphur regicide gas Atomic mass of cl=35.5u N=14u H=1u S=32u O=16u
Answer» Calculate the molecular mass of the following. A. Chlorine gad B. Ammonia gas C. Sulphur regicide gas Atomic mass of cl=35.5u N=14u H=1u S=32u O=16u

Discussion

8203.	Give reason why separation of mixtures example iron from a mixture of iron and sulphur is a physical change but heating a mixture of iron and sulphur is considered a chemical change.
Answer» Give reason why separation of mixtures example iron from a mixture of iron and sulphur is a physical change but heating a mixture of iron and sulphur is considered a chemical change.

Discussion

8204.	The substances that cause a reaction to occur or proceed at a faster rate without itself being affected is known as:
Answer» The substances that cause a reaction to occur or proceed at a faster rate without itself being affected is known as:

Discussion

8205.	Consider the following reaction 2A + 3F2 → 2AF3. What is the formula for the reaction product if we substitute iodine for fluorine?
Answer» Consider the following reaction 2A + 3F₂ → 2AF₃. What is the formula for the reaction product if we substitute iodine for fluorine?

Discussion

8206.	The X and Y from the below reaction, respectively are:
Answer» The X and Y from the below reaction, respectively are:

Discussion

8207.	Name the scientist who studied the movement of pollen grains suspended in water through a microscope.What is this phenomenon known as ?
Answer» Name the scientist who studied the movement of pollen grains suspended in water through a microscope.What is this phenomenon known as ?

Discussion

8208.	What is the oxidation number of manganese in Mn2O7?
Answer» What is the oxidation number of manganese in $M n_{2} O_{7}$ ?

Discussion

8209.	Depending on the amount of solute in a given solution, how are solutions classified?
Answer» Depending on the amount of solute in a given solution, how are solutions classified?

Discussion

8210.	Which noble gas has less than 8 electrons in the valence shell of its atom? What is this number?
Answer» Which noble gas has less than 8 electrons in the valence shell of its atom? What is this number?

Discussion

8211.	What is the difference between anode rays and cathode rays?
Answer» What is the difference between anode rays and cathode rays?

Discussion

8212.	The chemical name of laughing gas is ___ .
Answer» The chemical name of laughing gas is ___ .

Discussion

8213.	Question 20.2 Explain the following term with one example: Rancidity.
Answer» Question 20.2 Explain the following term with one example: Rancidity.

Discussion

8214.	An atom is represented by symbol 2314M. What does number 23 represent?
Answer» An atom is represented by symbol ²³₁₄M. What does number 23 represent?

Discussion

8215.	Which one of the following statements does apply to atoms which are isotopes of the same element?
Answer» Which one of the following statements does apply to atoms which are isotopes of the same element?

8215.

Which one of the following statements does apply to atoms which are isotopes of the same element?

Answer»

Which one of the following statements does apply to atoms which are isotopes of the same element?

Discussion

8216.	Assertion––––––––––– (A): The boiling point of HF is higher than that of H2O Reason––––––––– (R): The hydrogen bond strength in HF is lower than that in H2O
Answer» $A s s e r t i o n - --------- -$ (A): The boiling point of HF is higher than that of $H_{2} O$ $R e a s o n - ------- -$ (R): The hydrogen bond strength in HF is lower than that in $H_{2} O$

Discussion

8217.	BaSO4 and carbon on heating reacts to produce
Answer» $B a S O_{4}$ and carbon on heating reacts to produce

Discussion

8218.	H2O2 is used as what?
Answer» $H_{2} O_{2}$ is used as what?

Discussion

8219.	What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances?
Answer» What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances?

Discussion

8220.	Which one of the following mixtures can be separated into pure components by fractional distillation?
Answer» Which one of the following mixtures can be separated into pure components by fractional distillation?

Discussion

8221.	(a) What does the diffusion of gases tell us about their particles ? (b) Give one example of diffusion of gases in a liquid.
Answer» (a) What does the diffusion of gases tell us about their particles ? (b) Give one example of diffusion of gases in a liquid.

8221.

(a) What does the diffusion of gases tell us about their particles ? (b) Give one example of diffusion of gases in a liquid.

Answer»

(a) What does the diffusion of gases tell us about their particles ?

(b) Give one example of diffusion of gases in a liquid.

Discussion

8222.	Can we change an element to another element by changing the number of protons and electrons in it?
Answer» Can we change an element to another element by changing the number of protons and electrons in it?

Discussion

8223.	State the effect of green house gases on the temperature of earth's atmosphere.
Answer» State the effect of green house gases on the temperature of earth's atmosphere.

Discussion

8224.	Question 16 Which of the following in figure do not represent Bohr's model of an atom correctly? (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)
Answer» Question 16 Which of the following in figure do not represent Bohr's model of an atom correctly? (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Discussion

8225.	Which of the following salts will cause temporary hardness of water?
Answer» Which of the following salts will cause temporary hardness of water?

Discussion

8226.	State the pressure and volume law both in words and in the form of an equation.
Answer» State the pressure and volume law both in words and in the form of an equation.

Discussion

8227.	When ice changes into water, there is no change in:
Answer» When ice changes into water, there is no change in:

Discussion

8228.	What are electrons.
Answer» What are electrons.

Discussion

8229.	How much water should be added to 15g of salt to obtain 15%salt solution?
Answer» How much water should be added to 15g of salt to obtain 15%salt solution?

Discussion

8230.	Two metal rods A, B are dipped in their ionic solutions respectively. Following reaction occurs at each electrode: A→A2++2e−B2++2e−→B Which rod will acquire negative charge?
Answer» Two metal rods A, B are dipped in their ionic solutions respectively. Following reaction occurs at each electrode: $A \to A^{2 +} + 2 e^{-} B^{2 +} + 2 e^{-} \to B$ Which rod will acquire negative charge?

Discussion

8231.	Which of the following is true about interstitial compounds
Answer» Which of the following is true about interstitial compounds

Discussion

8232.	How many moles of electrons weight one kilogram?(Mass of electron = 9.1 Χ 10-31kg, avogadro number = 6.023 Χ 10 23)
Answer» How many moles of electrons weight one kilogram?(Mass of electron = 9.1 Χ 10^-31kg, avogadro number = 6.023 Χ 10 ²³)

Discussion

8233.	Eka aluminium and Eka silicon are known as
Answer» Eka aluminium and Eka silicon are known as

Discussion

8234.	Question 8.3 Write the balanced chemical equation for the following and identify the type of reaction: Hydrogen (g) + Chlorine (g) → Hydrogen chloride (g)
Answer» Question 8.3 Write the balanced chemical equation for the following and identify the type of reaction: Hydrogen (g) + Chlorine (g) $\to$ Hydrogen chloride (g)

Discussion

8235.	Calculate the amount of glucose required to prepare 250 grams of 5% solution of glucose by mass.
Answer» Calculate the amount of glucose required to prepare 250 grams of 5% solution of glucose by mass.

Discussion

8236.	What is mole and what is the formula to calculate molecule in the substance
Answer» What is mole and what is the formula to calculate molecule in the substance

Discussion

8237.	What is Henry's law? Explain.
Answer» What is Henry's law? Explain.

8237.

What is Henry's law? Explain.

Answer»

What is Henry's law?

Explain.

Discussion

8238.	water tank is getting filled up by water flowing at the rate of 15 centimetre cube per second the volume of water filled in yseconds is x centimetr Cube. write linear equation in two variables tool present situation
Answer» water tank is getting filled up by water flowing at the rate of 15 centimetre cube per second the volume of water filled in yseconds is x centimetr Cube. write linear equation in two variables tool present situation

Discussion

8239.	Even two or three particles of potassium permanganate impart color to a large volume of water.Which property of particles is illustrated by this observation?
Answer» Even two or three particles of potassium permanganate impart color to a large volume of water.Which property of particles is illustrated by this observation?

Discussion

8240.	Why air is homogenous not heterogenous?
Answer» Why air is homogenous not heterogenous?

Discussion

8241.	Can we classify soft drink as a colloid DISPERESED PHASE- liquid DISPERSING MEDIUM- Gas Type- Aerosol
Answer» Can we classify soft drink as a colloid DISPERESED PHASE- liquid DISPERSING MEDIUM- Gas Type- Aerosol

Discussion

8242.	what is gay lussac law
Answer» what is gay lussac law

Discussion

8243.	How Avogadro found that one mole of any element or compound consists of Avogadro number of molecules are atoms or particles or entities?
Answer» How Avogadro found that one mole of any element or compound consists of Avogadro number of molecules are atoms or particles or entities?

Discussion

8244.	In the universe how many states of matter are there ?name the matter !in addition to solid,liquid and gas
Answer» In the universe how many states of matter are there ?name the matter !in addition to solid,liquid and gas

Discussion

8245.	Do homogeneous mixture scatters a beam of light?
Answer» Do homogeneous mixture scatters a beam of light?

Discussion

8246.	Which of the following substances is a compound?
Answer» Which of the following substances is a compound?

Discussion

8247.	Producer gas is
Answer» Producer gas is

Discussion

8248.	When marble chip and marble powder is made to react with dilute HCl, then the rate of the reaction will be
Answer» When marble chip and marble powder is made to react with dilute HCl, then the rate of the reaction will be

Discussion

8249.	The rusting of an iron object is called: (a) corrosion and it is a physical as well as a chemical change (b) dissolution and it is a physical change (c) corrosion and it is a chemical change (d) dissolution and it is a chemical change
Answer» The rusting of an iron object is called: (a) corrosion and it is a physical as well as a chemical change (b) dissolution and it is a physical change (c) corrosion and it is a chemical change (d) dissolution and it is a chemical change

8249.

The rusting of an iron object is called: (a) corrosion and it is a physical as well as a chemical change (b) dissolution and it is a physical change (c) corrosion and it is a chemical change (d) dissolution and it is a chemical change

Answer»

The rusting of an iron object is called:

(a) corrosion and it is a physical as well as a chemical change

(b) dissolution and it is a physical change

(c) corrosion and it is a chemical change

(d) dissolution and it is a chemical change

Discussion

8250.	Why does the temperature remain constant during the melting of ice even though heat is supplied continuously ?
Answer» Why does the temperature remain constant during the melting of ice even though heat is supplied continuously ?

Discussion

Explore topic-wise InterviewSolutions in .

Solid can be converted directly to gaseous state. This process is known as

Calculate the molecular mass of the following. A. Chlorine gad B. Ammonia gas C. Sulphur regicide gas Atomic mass of cl=35.5u N=14u H=1u S=32u O=16u

Give reason why separation of mixtures example iron from a mixture of iron and sulphur is a physical change but heating a mixture of iron and sulphur is considered a chemical change.

The substances that cause a reaction to occur or proceed at a faster rate without itself being affected is known as:

Consider the following reaction 2A + 3F2 → 2AF3. What is the formula for the reaction product if we substitute iodine for fluorine?

The X and Y from the below reaction, respectively are:

Name the scientist who studied the movement of pollen grains suspended in water through a microscope.What is this phenomenon known as ?

What is the oxidation number of manganese in Mn2O7?

Depending on the amount of solute in a given solution, how are solutions classified?

Which noble gas has less than 8 electrons in the valence shell of its atom? What is this number?

What is the difference between anode rays and cathode rays?

The chemical name of laughing gas is ___ .

Question 20.2 Explain the following term with one example: Rancidity.

An atom is represented by symbol 2314M. What does number 23 represent?

Which one of the following statements does apply to atoms which are isotopes of the same element?

Assertion––––––––––– (A): The boiling point of HF is higher than that of H2O Reason––––––––– (R): The hydrogen bond strength in HF is lower than that in H2O

BaSO4 and carbon on heating reacts to produce

H2O2 is used as what?

What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances?

Which one of the following mixtures can be separated into pure components by fractional distillation?

(a) What does the diffusion of gases tell us about their particles ? (b) Give one example of diffusion of gases in a liquid.

Can we change an element to another element by changing the number of protons and electrons in it?

State the effect of green house gases on the temperature of earth's atmosphere.

Question 16 Which of the following in figure do not represent Bohr's model of an atom correctly? (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Which of the following salts will cause temporary hardness of water?

State the pressure and volume law both in words and in the form of an equation.

When ice changes into water, there is no change in:

What are electrons.

How much water should be added to 15g of salt to obtain 15%salt solution?

Two metal rods A, B are dipped in their ionic solutions respectively. Following reaction occurs at each electrode: A→A2++2e−B2++2e−→B Which rod will acquire negative charge?

Which of the following is true about interstitial compounds

How many moles of electrons weight one kilogram?(Mass of electron = 9.1 Χ 10-31kg, avogadro number = 6.023 Χ 10 23)

Eka aluminium and Eka silicon are known as

Question 8.3 Write the balanced chemical equation for the following and identify the type of reaction: Hydrogen (g) + Chlorine (g) → Hydrogen chloride (g)

Calculate the amount of glucose required to prepare 250 grams of 5% solution of glucose by mass.

What is mole and what is the formula to calculate molecule in the substance

What is Henry's law? Explain.

water tank is getting filled up by water flowing at the rate of 15 centimetre cube per second the volume of water filled in yseconds is x centimetr Cube. write linear equation in two variables tool present situation

Even two or three particles of potassium permanganate impart color to a large volume of water.Which property of particles is illustrated by this observation?

Why air is homogenous not heterogenous?

Can we classify soft drink as a colloid DISPERESED PHASE- liquid DISPERSING MEDIUM- Gas Type- Aerosol

what is gay lussac law

How Avogadro found that one mole of any element or compound consists of Avogadro number of molecules are atoms or particles or entities?

In the universe how many states of matter are there ?name the matter !in addition to solid,liquid and gas

Do homogeneous mixture scatters a beam of light?

Which of the following substances is a compound?

Producer gas is

When marble chip and marble powder is made to react with dilute HCl, then the rate of the reaction will be

The rusting of an iron object is called: (a) corrosion and it is a physical as well as a chemical change (b) dissolution and it is a physical change (c) corrosion and it is a chemical change (d) dissolution and it is a chemical change

Why does the temperature remain constant during the melting of ice even though heat is supplied continuously ?