7248 + Interview Questions in Chemistry Page 41 InterviewSolution

2001.	A COMPOUND CONTAINS 36% OF CARBON FIND THE MOLES OF THIS COMPOUND IN 10GM OF SAMPLE . THE COMPOUND HAS 2 CARBONS
Answer» A COMPOUND CONTAINS 36% OF CARBON FIND THE MOLES OF THIS COMPOUND IN 10GM OF SAMPLE . THE COMPOUND HAS 2 CARBONS

Discussion

2002.	Which among the following is best conductor of heat.
Answer» Which among the following is best conductor of heat.

Discussion

2003.	what conditions are required to achieve triple point of water?
Answer» what conditions are required to achieve triple point of water?

Discussion

2004.	What is the meaning of periodic change? Give examples.
Answer» What is the meaning of periodic change? Give examples.

Discussion

2005.	What is the state of the dispersed phase and dispersion medium in milk?
Answer» What is the state of the dispersed phase and dispersion medium in milk?

Discussion

2006.	When we will say a ratio to be simple while number ratio what is dimetric formIs RAM is a unit less quantityIs molar mass and molecular mass sameWhatvis law of reciprocal ki all elements have isotopes
Answer» When we will say a ratio to be simple while number ratio what is dimetric form Is RAM is a unit less quantity Is molar mass and molecular mass same Whatvis law of reciprocal ki all elements have isotopes

Discussion

2007.	How many molecules of water of hydration are present in 39.2 mg of Mohr's salt??
Answer» How many molecules of water of hydration are present in 39.2 mg of Mohr's salt??

Discussion

2008.	In which of the following forms is oil trapped inside the Earth?
Answer» In which of the following forms is oil trapped inside the Earth?

Discussion

2009.	Question 13 Match the terms of column A correctly with the phrases given in column B. A B(i)Polyester(a)Prepared by using wood pulp(ii)Teflon(b)Used for making parachutes and stockings(iii)Rayon(c)Used to make non−stick cookware(iv)Nylon(d)Fabrics do not wrinkle easily
Answer» Question 13 Match the terms of column A correctly with the phrases given in column B. $\begin{matrix} A & B (i) & P o l y e s t e r & (a) & P r e p a r e d b y u s i n g w o o d p u l p (i i) & T e f l o n & (b) & U s e d f o r m a k i n g p a r a c h u t e s a n d s t o c k i n g s (i i i) & R a y o n & (c) & U s e d t o m a k e n o n - s t i c k c o o k w a r e (i v) & N y l o n & (d) & F a b r i c s d o n o t w r i n k l e e a s i l y \end{matrix}$

2009.

Question 13 Match the terms of column A correctly with the phrases given in column B. A B(i)Polyester(a)Prepared by using wood pulp(ii)Teflon(b)Used for making parachutes and stockings(iii)Rayon(c)Used to make non−stick cookware(iv)Nylon(d)Fabrics do not wrinkle easily

Answer»

Question 13
Match the terms of column A correctly with the phrases given in column B.

$\begin{matrix} A & B (i) & P o l y e s t e r & (a) & P r e p a r e d b y u s i n g w o o d p u l p (i i) & T e f l o n & (b) & U s e d f o r m a k i n g p a r a c h u t e s a n d s t o c k i n g s (i i i) & R a y o n & (c) & U s e d t o m a k e n o n - s t i c k c o o k w a r e (i v) & N y l o n & (d) & F a b r i c s d o n o t w r i n k l e e a s i l y \end{matrix}$

Discussion

2010.	Question 2Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?
Answer» Question 2 Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

Discussion

2011.	State two experiences that made you think that air exerts pressure.
Answer» State two experiences that made you think that air exerts pressure.

Discussion

2012.	Question 2How are sol, solution and suspension different from each other?
Answer» Question 2 How are sol, solution and suspension different from each other?

Discussion

2013.	Plastics are not having high melting point so how it is useful to those who were living in warn areas?
Answer» Plastics are not having high melting point so how it is useful to those who were living in warn areas?

Discussion

2014.	How does luminous flame differ from non luminous flame?
Answer» How does luminous flame differ from non luminous flame?

Discussion

2015.	Arrange solid, liquid and gas on the basis of the rate of diffusion in ascending order.
Answer» Arrange solid, liquid and gas on the basis of the rate of diffusion in ascending order.

Discussion

2016.	Caluclate the number of molecules of hydrogen when 270grams of zinc reacts with dil.hcl
Answer» Caluclate the number of molecules of hydrogen when 270grams of zinc reacts with dil.hcl

Discussion

2017.	Which of the factors are responsible for the conversion of solid CO2 in vapours?
Answer» Which of the factors are responsible for the conversion of solid $C O_{2}$ in vapours?

Discussion

2018.	When alpha particles were sent through a thin metal foil, only one out of ten thousand rebounded. This observation led to the conclusion that:
Answer» When alpha particles were sent through a thin metal foil, only one out of ten thousand rebounded. This observation led to the conclusion that:

Discussion

2019.	two metal spheres of same material have diameter in the ratio 1:2 the ratio of their rates of cooling
Answer» two metal spheres of same material have diameter in the ratio 1:2 the ratio of their rates of cooling

Discussion

2020.	19. How to write a chemical equation
Answer» 19. How to write a chemical equation

Discussion

2021.	Question 29Cracker on ignition produces sound. Why?
Answer» Question 29 Cracker on ignition produces sound. Why?

Discussion

2022.	64 g of an organic compound has 24 g carbon and 8 g hydrogen and the rest is oxygen .Then what is the empirical formula of the compound
Answer» 64 g of an organic compound has 24 g carbon and 8 g hydrogen and the rest is oxygen .Then what is the empirical formula of the compound

Discussion

2023.	In a first-order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15 minutes half life. The time taken for the concentration to charge from 0.1 M to 0.025 M is:
Answer» In a first-order reaction, the concentration of the reactant, decreases from $0.8 M$ to $0.4 M$ in $15 minutes$ half life. The time taken for the concentration to charge from $0.1 M$ to $0.025 M$ is:

Discussion

2024.	Which of the following is a hygroscopic substance?
Answer» Which of the following is a hygroscopic substance?

Discussion

2025.	Question 21Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources. Air, sunlight, oxygen, coal, natural gas, petroleum, minerals, forests.
Answer» Question 21 Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources. Air, sunlight, oxygen, coal, natural gas, petroleum, minerals, forests.

Discussion

2026.	What do you observe when dilute sulphuric acid is added to granulated zinc?
Answer» What do you observe when dilute sulphuric acid is added to granulated zinc?

Discussion

2027.	In the above setup of voltameter, the electrolysis of NaCl is carried out. What ions will be on A and B?
Answer» In the above setup of voltameter, the electrolysis of NaCl is carried out. What ions will be on A and B?

2027.

In the above setup of voltameter, the electrolysis of NaCl is carried out. What ions will be on A and B?

Answer»

In the above setup of voltameter, the electrolysis of NaCl is carried out. What ions will be on A and B?

Discussion

2028.	3. Which one of the following is acidic in nature :- 1)Al(OH)3 2) Mg (OH)3 3)Be(OH)3 4) B(OH)3
Answer» 3. Which one of the following is acidic in nature :- 1)Al(OH)3 2) Mg (OH)3 3)Be(OH)3 4) B(OH)3

Discussion

2029.	Will 2 gas samples under same temperature, pressure and equal volume have same no. of moles? Why?
Answer» Will 2 gas samples under same temperature, pressure and equal volume have same no. of moles? Why?

Discussion

2030.	The picture below shows two cases in which a person is trying to burn the paper cup. In case 1, the cup has water in it and in case 2, it is empty and dry. Identify in which of the cases the paper will burn.
Answer» The picture below shows two cases in which a person is trying to burn the paper cup. In case 1, the cup has water in it and in case 2, it is empty and dry. Identify in which of the cases the paper will burn.

2030.

The picture below shows two cases in which a person is trying to burn the paper cup. In case 1, the cup has water in it and in case 2, it is empty and dry. Identify in which of the cases the paper will burn.

Answer»

The picture below shows two cases in which a person is trying to burn the paper cup. In case 1, the cup has water in it and in case 2, it is empty and dry. Identify in which of the cases the paper will burn.

Discussion

2031.	What is the difference between exothermic and endothermic reactions
Answer» What is the difference between exothermic and endothermic reactions

Discussion

2032.	The electron mobility in N-type germanium is 3900 cm2/V.s and its conductivity is 6.24 mho/cm, then impurity concentration is (Assume that the effect of cotters is negligible)
Answer» The electron mobility in N-type germanium is $3900 {cm}^{2} / V.s$ and its conductivity is $6.24 mho/cm$ , then impurity concentration is (Assume that the effect of cotters is negligible)

Discussion

2033.	(a) What is potable water ? Name any two methods to make water safe for drinking. (b) State two ways in which you can conserve water at home by preventing its wastage.
Answer» (a) What is potable water ? Name any two methods to make water safe for drinking. (b) State two ways in which you can conserve water at home by preventing its wastage.

2033.

(a) What is potable water ? Name any two methods to make water safe for drinking. (b) State two ways in which you can conserve water at home by preventing its wastage.

Answer»

(a) What is potable water ? Name any two methods to make water safe for drinking.

(b) State two ways in which you can conserve water at home by preventing its wastage.

Discussion

2034.	Roasting is defined as:
Answer» Roasting is defined as:

Discussion

2035.	A blade can float on water because of _____ of water.
Answer» A blade can float on water because of _____ of water.

Discussion

2036.	If for a reaction, A→B, ΔH=−10 kJ mol−1 and Ea=50 kJ mol−1, the energy of activation for the reaction, B→A will be:
Answer» If for a reaction, $A \to B$ , $Δ H = - 10 {kJ mol}^{- 1}$ and $E_{a} = 50 {kJ mol}^{- 1}$ , the energy of activation for the reaction, $B \to A$ will be:

Discussion

2037.	Hybridization of XeO4
Answer» Hybridization of XeO4

Discussion

2038.	Question 8: Name the fossil fuel which is easy to carry through pipes. Define the term Petrochemicals.
Answer» Question 8: Name the fossil fuel which is easy to carry through pipes. Define the term Petrochemicals.

2038.

Question 8: Name the fossil fuel which is easy to carry through pipes. Define the term Petrochemicals.

Answer»

Question 8:

Name the fossil fuel which is easy to carry through pipes.

Define the term Petrochemicals.

Discussion

2039.	How to calculate the no of electrons in any atom?
Answer» How to calculate the no of electrons in any atom?

Discussion

2040.	When CuSO4 is added to a solution of ammonia then how will we find what is the change in its boiling and freezing point? Whether they are raised or lowered?
Answer» When CuSO4 is added to a solution of ammonia then how will we find what is the change in its boiling and freezing point? Whether they are raised or lowered?

Discussion

2041.	Which of the following is a product of the reaction involving aluminium and sodium hydroxide?
Answer» Which of the following is a product of the reaction involving aluminium and sodium hydroxide?

Discussion

2042.	Write a brief note on acid rain.
Answer» Write a brief note on acid rain.

Discussion

2043.	Which of the following option shows the correct characteristics of metals?
Answer» Which of the following option shows the correct characteristics of metals?

Discussion

2044.	What does a soda- acid type fire extinguisher contain? How does it work? Explain the working of a soda-acid fire extinguisher with the help of a labelled diagram.
Answer» What does a soda- acid type fire extinguisher contain? How does it work? Explain the working of a soda-acid fire extinguisher with the help of a labelled diagram.

Discussion

2045.	Al2O3 + 6HCl → 2AlCl3 + 3H2O Al2O3 + 2NaOH → 2NaAlO2 + H2O (Sodium aluminate) From the above reactions, you can conclude that _______.
Answer» ${A l}_{2} O_{3}$ + $6 H C l$ $\to$ $2 A l {C l}_{3}$ + $3 H_{2} O$ ${A l}_{2} O_{3}$ + $2 N a O H$ $\to$ $2 N a A l O_{2}$ + $H_{2} O$ (Sodium aluminate) From the above reactions, you can conclude that _______.

2045.

Al2O3 + 6HCl → 2AlCl3 + 3H2O Al2O3 + 2NaOH → 2NaAlO2 + H2O (Sodium aluminate) From the above reactions, you can conclude that _______.

Answer»

${A l}_{2} O_{3}$ + $6 H C l$ $\to$ $2 A l {C l}_{3}$ + $3 H_{2} O$

${A l}_{2} O_{3}$ + $2 N a O H$ $\to$ $2 N a A l O_{2}$ + $H_{2} O$

(Sodium aluminate)

From the above reactions, you can conclude that _______.

Discussion

2046.	Why does the solubility of gas in a liquid decrese with rise in temperature?
Answer» Why does the solubility of gas in a liquid decrese with rise in temperature?

Discussion

2047.	The word "polymer" means -
Answer» The word "polymer" means -

Discussion

2048.	Which property of sand is used in extinguishing fires?
Answer» Which property of sand is used in extinguishing fires?

Discussion

2049.	It takes less time to cook vegetables in a pressure cooker
Answer» It takes less time to cook vegetables in a pressure cooker

Discussion

2050.	The ratio by mass of hydrogen and oxygen atoms in a water molecule is:
Answer» The ratio by mass of hydrogen and oxygen atoms in a water molecule is:

Discussion

Explore topic-wise InterviewSolutions in .

A COMPOUND CONTAINS 36% OF CARBON FIND THE MOLES OF THIS COMPOUND IN 10GM OF SAMPLE . THE COMPOUND HAS 2 CARBONS

Which among the following is best conductor of heat.

what conditions are required to achieve triple point of water?

What is the meaning of periodic change? Give examples.

What is the state of the dispersed phase and dispersion medium in milk?

When we will say a ratio to be simple while number ratio what is dimetric formIs RAM is a unit less quantityIs molar mass and molecular mass sameWhatvis law of reciprocal ki all elements have isotopes

How many molecules of water of hydration are present in 39.2 mg of Mohr's salt??

In which of the following forms is oil trapped inside the Earth?

Question 13 Match the terms of column A correctly with the phrases given in column B. A B(i)Polyester(a)Prepared by using wood pulp(ii)Teflon(b)Used for making parachutes and stockings(iii)Rayon(c)Used to make non−stick cookware(iv)Nylon(d)Fabrics do not wrinkle easily

Question 2Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

State two experiences that made you think that air exerts pressure.

Question 2How are sol, solution and suspension different from each other?

Plastics are not having high melting point so how it is useful to those who were living in warn areas?

How does luminous flame differ from non luminous flame?

Arrange solid, liquid and gas on the basis of the rate of diffusion in ascending order.

Caluclate the number of molecules of hydrogen when 270grams of zinc reacts with dil.hcl

Which of the factors are responsible for the conversion of solid CO2 in vapours?

When alpha particles were sent through a thin metal foil, only one out of ten thousand rebounded. This observation led to the conclusion that:

two metal spheres of same material have diameter in the ratio 1:2 the ratio of their rates of cooling

19. How to write a chemical equation

Question 29Cracker on ignition produces sound. Why?

64 g of an organic compound has 24 g carbon and 8 g hydrogen and the rest is oxygen .Then what is the empirical formula of the compound

In a first-order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15 minutes half life. The time taken for the concentration to charge from 0.1 M to 0.025 M is:

Which of the following is a hygroscopic substance?

Question 21Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources. Air, sunlight, oxygen, coal, natural gas, petroleum, minerals, forests.

What do you observe when dilute sulphuric acid is added to granulated zinc?

In the above setup of voltameter, the electrolysis of NaCl is carried out. What ions will be on A and B?

3. Which one of the following is acidic in nature :- 1)Al(OH)3 2) Mg (OH)3 3)Be(OH)3 4) B(OH)3

Will 2 gas samples under same temperature, pressure and equal volume have same no. of moles? Why?

The picture below shows two cases in which a person is trying to burn the paper cup. In case 1, the cup has water in it and in case 2, it is empty and dry. Identify in which of the cases the paper will burn.

What is the difference between exothermic and endothermic reactions

The electron mobility in N-type germanium is 3900 cm2/V.s and its conductivity is 6.24 mho/cm, then impurity concentration is (Assume that the effect of cotters is negligible)

(a) What is potable water ? Name any two methods to make water safe for drinking. (b) State two ways in which you can conserve water at home by preventing its wastage.

Roasting is defined as:

A blade can float on water because of _____ of water.

If for a reaction, A→B, ΔH=−10 kJ mol−1 and Ea=50 kJ mol−1, the energy of activation for the reaction, B→A will be:

Hybridization of XeO4

Question 8: Name the fossil fuel which is easy to carry through pipes. Define the term Petrochemicals.

How to calculate the no of electrons in any atom?

When CuSO4 is added to a solution of ammonia then how will we find what is the change in its boiling and freezing point? Whether they are raised or lowered?

Which of the following is a product of the reaction involving aluminium and sodium hydroxide?

Write a brief note on acid rain.

Which of the following option shows the correct characteristics of metals?

What does a soda- acid type fire extinguisher contain? How does it work? Explain the working of a soda-acid fire extinguisher with the help of a labelled diagram.

Al2O3 + 6HCl → 2AlCl3 + 3H2O Al2O3 + 2NaOH → 2NaAlO2 + H2O (Sodium aluminate) From the above reactions, you can conclude that _______.

Why does the solubility of gas in a liquid decrese with rise in temperature?

The word "polymer" means -

Which property of sand is used in extinguishing fires?

It takes less time to cook vegetables in a pressure cooker

The ratio by mass of hydrogen and oxygen atoms in a water molecule is: