7248 + Interview Questions in Chemistry Page 112 InterviewSolution

5551.	Read the following statements. A. A few rivers in India are like sewers. B. Some cattle may die by feeding on plastic bags. C. Installation of wastewater treatment plants has cleaned up most of the rivers in India. D. Sludge is effectively utilized in the production of biogas. Select the option which includes all correct statements.
Answer» Read the following statements. A. A few rivers in India are like sewers. B. Some cattle may die by feeding on plastic bags. C. Installation of wastewater treatment plants has cleaned up most of the rivers in India. D. Sludge is effectively utilized in the production of biogas. Select the option which includes all correct statements.

Discussion

5552.	Enter the correct sequence of the words that should be used in the below paragraph. (A) He was baron [A] / barren [B] of tender feelings. (B) The kohl [A] / coal [B] glowed [A] / glowered [B] in the dark giving solace to many. (C) The pillars were decorated with a freeze [A] / frieze [B] of angels. (D) The malls want to be in sync [A] / sink [B] with the customer’s demands. The correct sequence is: ___
Answer» Enter the correct sequence of the words that should be used in the below paragraph. (A) He was baron [A] / barren [B] of tender feelings. (B) The kohl [A] / coal [B] glowed [A] / glowered [B] in the dark giving solace to many. (C) The pillars were decorated with a freeze [A] / frieze [B] of angels. (D) The malls want to be in sync [A] / sink [B] with the customer’s demands. The correct sequence is: ___

Discussion

5553.	Medicines and chemicals are stored in dark colored bottles to prevent their:
Answer» Medicines and chemicals are stored in dark colored bottles to prevent their:

Discussion

5554.	Burning a firecracker is an example for
Answer» Burning a firecracker is an example for

Discussion

5555.	The metal which reacts with water only when it is red hot is:
Answer» The metal which reacts with water only when it is red hot is:

Discussion

5556.	____ occurs in iron by the influence of water vapour and oxygen present in the air.
Answer» ____ occurs in iron by the influence of water vapour and oxygen present in the air.

Discussion

5557.	Which experiment led to the discovery of protons?
Answer» Which experiment led to the discovery of protons?

Discussion

5558.	Name the hardest natural substance known.
Answer» Name the hardest natural substance known.

Discussion

5559.	1. What is the definition of acidic salts? 2. Write an equation for preparation of aqueous salt. 3. What will happen when bases react with metals? [3 MARKS]
Answer» 1. What is the definition of acidic salts? 2. Write an equation for preparation of aqueous salt. 3. What will happen when bases react with metals? [3 MARKS]

Discussion

5560.	Melting of ice cream is a ___ change. (reversible/irreversible)
Answer» Melting of ice cream is a ___ change. (reversible/irreversible)

Discussion

5561.	What will happen if the water cycle in the nature stops?
Answer» What will happen if the water cycle in the nature stops?

Discussion

5562.	State the colour change when white silver chloride is exposed to sunlight. What type of chemical reaction is this?
Answer» State the colour change when white silver chloride is exposed to sunlight. What type of chemical reaction is this?

Discussion

5563.	___ is also known as Cinnabar.
Answer» ___ is also known as Cinnabar.

Discussion

5564.	What are noble metals? Is there any other such classification of metals?
Answer» What are noble metals? Is there any other such classification of metals?

Discussion

5565.	Which of the following fibre can be used as a substitute for wool?
Answer» Which of the following fibre can be used as a substitute for wool?

Discussion

5566.	Define molecular formula
Answer» Define molecular formula

Discussion

5567.	Answer in short ? Sodium should be stored in kerosene . why?
Answer» Answer in short ? Sodium should be stored in kerosene . why?

5567.

Answer in short ? Sodium should be stored in kerosene . why?

Answer»

Answer in short ?

Sodium should be stored in kerosene . why?

Discussion

5568.	Origin of water takes place on earth due to:
Answer» Origin of water takes place on earth due to:

Discussion

5569.	From the given diagram of electrolysis of water choose the correct statement.
Answer» From the given diagram of electrolysis of water choose the correct statement.

5569.

From the given diagram of electrolysis of water choose the correct statement.

Answer»

From the given diagram of electrolysis of water choose the correct statement.

Discussion

5570.	What are petrochemical?,is there example for petrchemicals?
Answer» What are petrochemical?,is there example for petrchemicals?

Discussion

5571.	In water gas shift reaction, the catalyst used is .
Answer» In water gas shift reaction, the catalyst used is .

Discussion

5572.	What is the S.I. unit of power?
Answer» What is the S.I. unit of power?

Discussion

5573.	Explain the properties of carbon compounds.
Answer» Explain the properties of carbon compounds.

Discussion

5574.	A heap of green leaves is lying in one corner of a park. The green leaves in the heap burn with difficulty because : (a) they contain a tough material called cellulose (b) they contain a lot of water (c) they contain a green pigment chlorophyll (d) they do not get sufficient oxygen for burning
Answer» A heap of green leaves is lying in one corner of a park. The green leaves in the heap burn with difficulty because : (a) they contain a tough material called cellulose (b) they contain a lot of water (c) they contain a green pigment chlorophyll (d) they do not get sufficient oxygen for burning

5574.

A heap of green leaves is lying in one corner of a park. The green leaves in the heap burn with difficulty because : (a) they contain a tough material called cellulose (b) they contain a lot of water (c) they contain a green pigment chlorophyll (d) they do not get sufficient oxygen for burning

Answer»

A heap of green leaves is lying in one corner of a park. The green leaves in the heap burn with difficulty because :

(a) they contain a tough material called cellulose

(b) they contain a lot of water

(c) they contain a green pigment chlorophyll

(d) they do not get sufficient oxygen for burning

Discussion

5575.	Choose the correct statements:-
Answer» Choose the correct statements:-

Discussion

5576.	Assertion:- When the crystal of potassium permanganate is dissolved in water then colour of water turns pink. We put this pink solution in another beaker containing clear water and they are mixed in the ratio of 9:1 (9 parts of clear water to 1 part of pink solution) at every step of dilution then it takes infinite similar steps to get clear water. Reason:- Particles of matter are too tiny in size.
Answer» Assertion:- When the crystal of potassium permanganate is dissolved in water then colour of water turns pink. We put this pink solution in another beaker containing clear water and they are mixed in the ratio of 9:1 (9 parts of clear water to 1 part of pink solution) at every step of dilution then it takes infinite similar steps to get clear water. Reason:- Particles of matter are too tiny in size.

5576.

Assertion:- When the crystal of potassium permanganate is dissolved in water then colour of water turns pink. We put this pink solution in another beaker containing clear water and they are mixed in the ratio of 9:1 (9 parts of clear water to 1 part of pink solution) at every step of dilution then it takes infinite similar steps to get clear water. Reason:- Particles of matter are too tiny in size.

Answer»

Assertion:- When the crystal of potassium permanganate is dissolved in water then colour of water turns pink. We put this pink solution in another beaker containing clear water and they are mixed in the ratio of 9:1 (9 parts of clear water to 1 part of pink solution) at every step of dilution then it takes infinite similar steps to get clear water.

Reason:- Particles of matter are too tiny in size.

Discussion

5577.	Petroleum is a mixture of various components. By which of the following process are they separated?
Answer» Petroleum is a mixture of various components. By which of the following process are they separated?

Discussion

5578.	The skeleton equation ___________ __________________ the relative amounts of the reactants and products.
Answer» The skeleton equation ___________ __________________ the relative amounts of the reactants and products.

5578.

The skeleton equation _ ________ the relative amounts of the reactants and products.

Answer»

The skeleton equation ___________ __________________ the relative amounts of the reactants and products.

Discussion

5579.	Sugar dissolves faster on stirring with a spoon. Which of the following is the best reason to explain this?
Answer» Sugar dissolves faster on stirring with a spoon. Which of the following is the best reason to explain this?

Discussion

5580.	What happens when iron fillings are added to copper sulphate solution?
Answer» What happens when iron fillings are added to copper sulphate solution?

5580.

What happens when iron fillings are added to copper sulphate solution?

Answer»

What happens when iron fillings are added to copper sulphate solution?

Discussion

5581.	If sodium has atomic number 11 and mass number of 23, then the number of protons, neutrons, and electrons in an uncharged atom is :
Answer» If sodium has atomic number 11 and mass number of 23, then the number of protons, neutrons, and electrons in an uncharged atom is :

Discussion

5582.	Modern non-stick cookware and the flat end of an electric iron has a coating of a polymer. Identify the name of the polymer.
Answer» Modern non-stick cookware and the flat end of an electric iron has a coating of a polymer. Identify the name of the polymer.

Discussion

5583.	Which of the following is incorrect about colloids?
Answer» Which of the following is incorrect about colloids?

Discussion

5584.	The substances that are obtained from petroleum and natural gas are called ______.
Answer» The substances that are obtained from petroleum and natural gas are called ______.

Discussion

5585.	Translate the following statements into chemical equations and then balance them. (A) Hydrogen gas combines with nitrogen to form ammonia (B) Hydrogen sulphide gas burns in air to give water and sulphur dioxide. (C) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. [3 MARKS]
Answer» Translate the following statements into chemical equations and then balance them. (A) Hydrogen gas combines with nitrogen to form ammonia (B) Hydrogen sulphide gas burns in air to give water and sulphur dioxide. (C) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. [3 MARKS]

5585.

Translate the following statements into chemical equations and then balance them. (A) Hydrogen gas combines with nitrogen to form ammonia (B) Hydrogen sulphide gas burns in air to give water and sulphur dioxide. (C) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. [3 MARKS]

Answer»

Translate the following statements into chemical equations and then balance them.

(A) Hydrogen gas combines with nitrogen to form ammonia

(B) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

(C) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. [3 MARKS]

Discussion

5586.	Find the number of oxygen atoms in 88g of CO2 ?
Answer» Find the number of oxygen atoms in 88g of ${C O}_{2}$ ?

Discussion

5587.	Which of the following characteristic is shown by the particle of matter?
Answer» Which of the following characteristic is shown by the particle of matter?

Discussion

5588.	A force has been applied on a ball when it is
Answer» A force has been applied on a ball when it is

Discussion

5589.	If gallium exists in liquid form at room temperature. Than why does an electric soldering wire exists in solid form
Answer» If gallium exists in liquid form at room temperature. Than why does an electric soldering wire exists in solid form

Discussion

5590.	Hydrogen is evolved when dilute HCl reacts with magnesium , but nothing happens in the case of mercury and silver. Explain.
Answer» Hydrogen is evolved when dilute HCl reacts with magnesium , but nothing happens in the case of mercury and silver. Explain.

Discussion

5591.	What are the two elements formed when water is decomposed?
Answer» What are the two elements formed when water is decomposed?

Discussion

5592.	A flame is formed during burning of a substance due to ___ .
Answer» A flame is formed during burning of a substance due to ___ .

Discussion

5593.	Match options in first column to the correct option the second column. 1. Polyesteri> prepared by using wood pulp.2. Teflonii> Used for making parachutes3. Rayoniii> Used for making non stickcookwares.4. Nyloniv> Do not wrinkle easily.
Answer» Match options in first column to the correct option the second column. $\begin{matrix} 1. P o l y e s t e r & i > p r e p a r e d b y u s i n g w o o d p u l p . 2. T e f l o n & i i > U s e d f o r m a k i n g p a r a c h u t e s 3. R a y o n & i i i > U s e d f o r m a k i n g n o n s t i c k c o o k w a r e s . 4. N y l o n & i v > D o n o t w r i n k l e e a s i l y . \end{matrix}$

Discussion

5594.	The correct order of fuels mentioned below in increasing order of calorific value is: CNG, Petrol, Cow Dung Cake and Wood.
Answer» The correct order of fuels mentioned below in increasing order of calorific value is: CNG, Petrol, Cow Dung Cake and Wood.

Discussion

5595.	___ is the primary source of energy in our Solar System.
Answer» ___ is the primary source of energy in our Solar System.

Discussion

5596.	In a flame given by a candle complete combustion takes place in the outer most part and then in the middle part there is incomplete combustion but when oxygen is present everywhere then why is it that in one part there is complete combustion and in the other not?
Answer» In a flame given by a candle complete combustion takes place in the outer most part and then in the middle part there is incomplete combustion but when oxygen is present everywhere then why is it that in one part there is complete combustion and in the other not?

Discussion

5597.	What is meant by atomic mass number give brief information of three sub atomic particles with reference to electrical charge,mass and location?
Answer» What is meant by atomic mass number give brief information of three sub atomic particles with reference to electrical charge,mass and location?

Discussion

5598.	What are electrons and proyons
Answer» What are electrons and proyons

Discussion

5599.	What is a polymer? [2 MARKS]
Answer» What is a polymer? [2 MARKS]

Discussion

5600.	What material is chosen for covering electrical wires and for making handles of screw drivers? [3 MARKS]
Answer» What material is chosen for covering electrical wires and for making handles of screw drivers? [3 MARKS]

Discussion

Explore topic-wise InterviewSolutions in .

Medicines and chemicals are stored in dark colored bottles to prevent their:

Burning a firecracker is an example for

The metal which reacts with water only when it is red hot is:

____ occurs in iron by the influence of water vapour and oxygen present in the air.

Which experiment led to the discovery of protons?

Name the hardest natural substance known.

1. What is the definition of acidic salts? 2. Write an equation for preparation of aqueous salt. 3. What will happen when bases react with metals? [3 MARKS]

Melting of ice cream is a ___ change. (reversible/irreversible)

What will happen if the water cycle in the nature stops?

State the colour change when white silver chloride is exposed to sunlight. What type of chemical reaction is this?

___ is also known as Cinnabar.

What are noble metals? Is there any other such classification of metals?

Which of the following fibre can be used as a substitute for wool?

Define molecular formula

Answer in short ? Sodium should be stored in kerosene . why?

Origin of water takes place on earth due to:

From the given diagram of electrolysis of water choose the correct statement.

What are petrochemical?,is there example for petrchemicals?

In water gas shift reaction, the catalyst used is .

What is the S.I. unit of power?

Explain the properties of carbon compounds.

A heap of green leaves is lying in one corner of a park. The green leaves in the heap burn with difficulty because : (a) they contain a tough material called cellulose (b) they contain a lot of water (c) they contain a green pigment chlorophyll (d) they do not get sufficient oxygen for burning

Choose the correct statements:-

Petroleum is a mixture of various components. By which of the following process are they separated?

The skeleton equation ___________ __________________ the relative amounts of the reactants and products.

Sugar dissolves faster on stirring with a spoon. Which of the following is the best reason to explain this?

What happens when iron fillings are added to copper sulphate solution?

If sodium has atomic number 11 and mass number of 23, then the number of protons, neutrons, and electrons in an uncharged atom is :

Modern non-stick cookware and the flat end of an electric iron has a coating of a polymer. Identify the name of the polymer.

Which of the following is incorrect about colloids?

The substances that are obtained from petroleum and natural gas are called ______.

Find the number of oxygen atoms in 88g of CO2 ?

Which of the following characteristic is shown by the particle of matter?

A force has been applied on a ball when it is

If gallium exists in liquid form at room temperature. Than why does an electric soldering wire exists in solid form

Hydrogen is evolved when dilute HCl reacts with magnesium , but nothing happens in the case of mercury and silver. Explain.

What are the two elements formed when water is decomposed?

A flame is formed during burning of a substance due to ___ .

Match options in first column to the correct option the second column. 1. Polyesteri&gt; prepared by using wood pulp.2. Teflonii&gt; Used for making parachutes3. Rayoniii&gt; Used for making non stickcookwares.4. Nyloniv&gt; Do not wrinkle easily.

The correct order of fuels mentioned below in increasing order of calorific value is: CNG, Petrol, Cow Dung Cake and Wood.

___ is the primary source of energy in our Solar System.

In a flame given by a candle complete combustion takes place in the outer most part and then in the middle part there is incomplete combustion but when oxygen is present everywhere then why is it that in one part there is complete combustion and in the other not?

What is meant by atomic mass number give brief information of three sub atomic particles with reference to electrical charge,mass and location?

What are electrons and proyons

What is a polymer? [2 MARKS]

What material is chosen for covering electrical wires and for making handles of screw drivers? [3 MARKS]

The skeleton equation _ ________ the relative amounts of the reactants and products.

Match options in first column to the correct option the second column. 1. Polyesteri> prepared by using wood pulp.2. Teflonii> Used for making parachutes3. Rayoniii> Used for making non stickcookwares.4. Nyloniv> Do not wrinkle easily.