10223 + Interview Questions in Chemistry Page 162 InterviewSolution

8051.	Classify the following as pure substances and mixtures. Brick, ice, hydrochloric acid, air
Answer» Classify the following as pure substances and mixtures. Brick, ice, hydrochloric acid, air

Discussion

8052.	It is fine to say that "colloids are heterogeneous systems" But is this statement correct " colloids are a heterogeneous system in which phase boundaries exist. " If its correct then how? Provide with an example.
Answer» It is fine to say that "colloids are heterogeneous systems" But is this statement correct " colloids are a heterogeneous system in which phase boundaries exist. " If its correct then how? Provide with an example.

8052.

It is fine to say that "colloids are heterogeneous systems" But is this statement correct " colloids are a heterogeneous system in which phase boundaries exist. " If its correct then how? Provide with an example.

Answer»

It is fine to say that "colloids are heterogeneous systems"

But is this statement correct " colloids are a heterogeneous system in which phase boundaries exist. "

If its correct then how? Provide with an example.

Discussion

8053.	Values of IE1, IE2 and IE3 of an element are 9.32, 18.21 and 553.83 eV. What information's do these data convey?
Answer» Values of $I E_{1}$ , $I E_{2}$ and $I E_{3}$ of an element are 9.32, 18.21 and 553.83 eV. What information's do these data convey?

Discussion

8054.	Give reason: Co2 is a gas
Answer» Give reason: Co2 is a gas

Discussion

8055.	Even though air contains 78% nitrogen, 20% oxygen by volume and formation of NO is thermodynamically feasible, they do not combine to form NO. This is because
Answer» Even though air contains $78 %$ nitrogen, $20 %$ oxygen by volume and formation of $N O$ is thermodynamically feasible, they do not combine to form $N O$ . This is because

Discussion

8056.	If the temperature of any gas is increased, its volume:
Answer» If the temperature of any gas is increased, its volume:

Discussion

8057.	Is there anything which is matter and can be divided infinitely?
Answer» Is there anything which is matter and can be divided infinitely?

Discussion

8058.	Was there any defect in Mendeleev's periodic table? Is there any defect in the modern periodic table? What are those?
Answer» Was there any defect in Mendeleev's periodic table? Is there any defect in the modern periodic table? What are those?

8058.

Was there any defect in Mendeleev's periodic table? Is there any defect in the modern periodic table? What are those?

Answer»

Was there any defect in Mendeleev's periodic table?

Is there any defect in the modern periodic table? What are those?

Discussion

8059.	Sir I am Shaun job of class 9. I have a doubt regarding chemistry on the topic of the structure of an atom This is the question . Why does an atom show isotopes ? Do all elements show isotopes?Can you name some uses of these ? Thank you for your time Sir Shaun
Answer» Sir I am Shaun job of class 9. I have a doubt regarding chemistry on the topic of the structure of an atom This is the question . Why does an atom show isotopes ? Do all elements show isotopes?Can you name some uses of these ? Thank you for your time Sir Shaun

Discussion

8060.	What is the weight of 22.4 litres of Ammonia gas at STP?
Answer» What is the weight of 22.4 litres of Ammonia gas at STP?

Discussion

8061.	No. of moles of water in 488.6 g of BaCl2.2H2O are (molecular weight of BaCl2.2H2O = 244.33)
Answer» No. of moles of water in $488.6 g$ of $B a C l_{2} .2 H_{2} O$ are (molecular weight of $B a C l_{2} .2 H_{2} O = 244.33$ )

Discussion

8062.	Question 19. Which of the following is acidic in nature? (a) Lime juice (b) Human blood (c) Lime water (d) Antacid
Answer» Question 19. Which of the following is acidic in nature? (a) Lime juice (b) Human blood (c) Lime water (d) Antacid

Discussion

8063.	Substance which vaporise during burning gives_________.
Answer» Substance which vaporise during burning gives_________.

Discussion

8064.	Which of the following gases do not have neutron in the nucleus of their atoms?
Answer» Which of the following gases do not have neutron in the nucleus of their atoms?

Discussion

8065.	The f-block elements are called as _______ .
Answer» The f-block elements are called as _______ .

Discussion

8066.	Explain the application of compressibility in gases with a suitable example
Answer» Explain the application of compressibility in gases with a suitable example

Discussion

8067.	What is noble gases
Answer» What is noble gases

Discussion

8068.	The correct sequence of increasing covalent character is represented by
Answer» The correct sequence of increasing covalent character is represented by

Discussion

8069.	Question 11 A sample of water under study was found to boil at 102∘C at normal temperature and pressure. Is the water pure? Will this water freeze at 0∘C? Comment.
Answer» Question 11 A sample of water under study was found to boil at 102 $^{\circ}$ C at normal temperature and pressure. Is the water pure? Will this water freeze at 0 $^{\circ}$ C? Comment.

Discussion

8070.	One of the following represents the solution of solid in a solid. This one is : (a) boron (b) brass (c) beryllium (d) bread
Answer» One of the following represents the solution of solid in a solid. This one is : (a) boron (b) brass (c) beryllium (d) bread

8070.

One of the following represents the solution of solid in a solid. This one is : (a) boron (b) brass (c) beryllium (d) bread

Answer»

One of the following represents the solution of solid in a solid. This one is :

(a) boron (b) brass (c) beryllium (d) bread

Discussion

8071.	Hydrogen diffuses 6 times faster than gas X. The molecular mass for X will be___.
Answer» Hydrogen diffuses 6 times faster than gas X. The molecular mass for X will be___.

Discussion

8072.	Which of the following is an example of metal oxide?
Answer» Which of the following is an example of metal oxide?

Discussion

8073.	Between pH value of 7 to 14, As pH increases:
Answer» Between pH value of 7 to 14, As pH increases:

Discussion

8074.	Question 5 (d) Draw the electron dot structure for F2.
Answer» Question 5 (d) Draw the electron dot structure for $F_{2}$ .

Discussion

8075.	Select the option that will complete the homologous series given below. CH4, C2H6, _______, C4H10, C5H12
Answer» Select the option that will complete the homologous series given below. $C H_{4}$ , $C_{2} H_{6}$ , _______, $C_{4} H_{10}$ , $C_{5} H_{12}$

8075.

Select the option that will complete the homologous series given below. CH4, C2H6, _______, C4H10, C5H12

Answer»

Select the option that will complete the homologous series given below.

$C H_{4}$ , $C_{2} H_{6}$ , _______, $C_{4} H_{10}$ , $C_{5} H_{12}$

Discussion

8076.	Which of the following phenomenon is responsible for the drying of wet clothes?
Answer» Which of the following phenomenon is responsible for the drying of wet clothes?

Discussion

8077.	Question 5 (b) What is the physical state of water at— (b)0∘C
Answer» Question 5 (b) What is the physical state of water at— $(b) 0^{\circ} C$

Discussion

8078.	The mass percentage of nitrogen in urea (NH2CONH2)is:
Answer» The mass percentage of nitrogen in urea ( $N H_{2} C O N H_{2}$ )is:

Discussion

8079.	How many e− are present in the kernel of Cl?
Answer» How many $e^{-}$ are present in the kernel of Cl?

8079.

How many e− are present in the kernel of Cl?

Answer»

How many $e^{-}$ are present in the kernel of Cl?

Discussion

8080.	What is the product formed when K2CO3 react with HCl ?
Answer» What is the product formed when $K_{2} C O_{3}$ react with $H C l$ ?

Discussion

8081.	Oxidation number of nickel in Ni(CO)4
Answer» Oxidation number of nickel in $N i (C O)_{4}$

Discussion

8082.	Mention some useful applications of Isotopes. [3 MARKS]
Answer» Mention some useful applications of Isotopes. [3 MARKS]

Discussion

8083.	Which among the following methods is most suitable for the separation of dyes in black ink?
Answer» Which among the following methods is most suitable for the separation of dyes in black ink?

Discussion

8084.	Elements are mostly grouped as metals, non-metals and ___ .
Answer» Elements are mostly grouped as metals, non-metals and ___ .

Discussion

8085.	The number of neutrons present in the element AZX is given by ________.
Answer» The number of neutrons present in the element $_{Z}^{A} X$ is given by ________.

Discussion

8086.	Give an example of a reaction where the following are involved: (a) Evolution of heat (b) Absorption of heat (c) High pressure is required
Answer» Give an example of a reaction where the following are involved: (a) Evolution of heat (b) Absorption of heat (c) High pressure is required

8086.

Give an example of a reaction where the following are involved: (a) Evolution of heat (b) Absorption of heat (c) High pressure is required

Answer»

Give an example of a reaction where the following are involved:

(a) Evolution of heat

(b) Absorption of heat

(c) High pressure is required

Discussion

8087.	Why does dry ice doesn't wet the surface on which it is kept?
Answer» Why does dry ice doesn't wet the surface on which it is kept?

Discussion

8088.	Hi Need to now explain about solution if it is there in exam for 4marks
Answer» Hi Need to now explain about solution if it is there in exam for 4marks

8088.

Hi Need to now explain about solution if it is there in exam for 4marks

Answer»

Hi

Need to now explain about solution if it is there in exam for 4marks

Discussion

8089.	What do you mean by brine?
Answer» What do you mean by brine?

Discussion

8090.	Difference between difuse and disperse
Answer» Difference between difuse and disperse

Discussion

8091.	Explain with activity that particles of matter are made up of particles
Answer» Explain with activity that particles of matter are made up of particles

Discussion

8092.	when fomation of NaCl electron configuration Na loss one atom and Cl gain this atom in this situation Na and Cl are both atom are stable or not.
Answer» when fomation of NaCl electron configuration Na loss one atom and Cl gain this atom in this situation Na and Cl are both atom are stable or not.

Discussion

8093.	Is sea water homogeneous or heterogeneous?
Answer» Is sea water homogeneous or heterogeneous?

Discussion

8094.	An Arrhenius acid is a substance that gives ions in an aqueous solution.
Answer» An Arrhenius acid is a substance that gives ions in an aqueous solution.

Discussion

8095.	Under what conditions heat can be given to a substance without raising its temperature?
Answer» Under what conditions heat can be given to a substance without raising its temperature?

Discussion

8096.	An element may be represented as 18X40 . Find the number of electrons, protons and neutrons in this atom.
Answer» An element may be represented as $_{18} X^{40}$ . Find the number of electrons, protons and neutrons in this atom.

Discussion

8097.	How does perspiration or sweating help keep our body cool on a hot day?
Answer» How does perspiration or sweating help keep our body cool on a hot day?

Discussion

8098.	What is fixed proportion?
Answer» What is fixed proportion?

Discussion

8099.	Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.
Answer» Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.

Discussion

8100.	Based on atomicity, what type of molecule is water?
Answer» Based on atomicity, what type of molecule is water?

Discussion

Explore topic-wise InterviewSolutions in .

Classify the following as pure substances and mixtures. Brick, ice, hydrochloric acid, air

It is fine to say that "colloids are heterogeneous systems" But is this statement correct " colloids are a heterogeneous system in which phase boundaries exist. " If its correct then how? Provide with an example.

Values of IE1, IE2 and IE3 of an element are 9.32, 18.21 and 553.83 eV. What information's do these data convey?

Give reason: Co2 is a gas

Even though air contains 78% nitrogen, 20% oxygen by volume and formation of NO is thermodynamically feasible, they do not combine to form NO. This is because

If the temperature of any gas is increased, its volume:

Is there anything which is matter and can be divided infinitely?

Was there any defect in Mendeleev's periodic table? Is there any defect in the modern periodic table? What are those?

Sir I am Shaun job of class 9. I have a doubt regarding chemistry on the topic of the structure of an atom This is the question . Why does an atom show isotopes ? Do all elements show isotopes?Can you name some uses of these ? Thank you for your time Sir Shaun

What is the weight of 22.4 litres of Ammonia gas at STP?

No. of moles of water in 488.6 g of BaCl2.2H2O are (molecular weight of BaCl2.2H2O = 244.33)

Question 19. Which of the following is acidic in nature? (a) Lime juice (b) Human blood (c) Lime water (d) Antacid

Substance which vaporise during burning gives_________.

Which of the following gases do not have neutron in the nucleus of their atoms?

The f-block elements are called as _______ .

Explain the application of compressibility in gases with a suitable example

What is noble gases

The correct sequence of increasing covalent character is represented by

Question 11 A sample of water under study was found to boil at 102∘C at normal temperature and pressure. Is the water pure? Will this water freeze at 0∘C? Comment.

One of the following represents the solution of solid in a solid. This one is : (a) boron (b) brass (c) beryllium (d) bread

Hydrogen diffuses 6 times faster than gas X. The molecular mass for X will be___.

Which of the following is an example of metal oxide?

Between pH value of 7 to 14, As pH increases:

Question 5 (d) Draw the electron dot structure for F2.

Select the option that will complete the homologous series given below. CH4, C2H6, _______, C4H10, C5H12

Which of the following phenomenon is responsible for the drying of wet clothes?

Question 5 (b) What is the physical state of water at— (b)0∘C

The mass percentage of nitrogen in urea (NH2CONH2)is:

How many e− are present in the kernel of Cl?

What is the product formed when K2CO3 react with HCl ?

Oxidation number of nickel in Ni(CO)4

Mention some useful applications of Isotopes. [3 MARKS]

Which among the following methods is most suitable for the separation of dyes in black ink?

Elements are mostly grouped as metals, non-metals and ___ .

The number of neutrons present in the element AZX is given by ________.

Give an example of a reaction where the following are involved: (a) Evolution of heat (b) Absorption of heat (c) High pressure is required

Why does dry ice doesn't wet the surface on which it is kept?

Hi Need to now explain about solution if it is there in exam for 4marks

What do you mean by brine?

Difference between difuse and disperse

Explain with activity that particles of matter are made up of particles

when fomation of NaCl electron configuration Na loss one atom and Cl gain this atom in this situation Na and Cl are both atom are stable or not.

Is sea water homogeneous or heterogeneous?

An Arrhenius acid is a substance that gives ions in an aqueous solution.

Under what conditions heat can be given to a substance without raising its temperature?

An element may be represented as 18X40 . Find the number of electrons, protons and neutrons in this atom.

How does perspiration or sweating help keep our body cool on a hot day?

What is fixed proportion?

Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.

Based on atomicity, what type of molecule is water?