7248 + Interview Questions in Chemistry Page 42 InterviewSolution

2051.	The molecular structures of synthetic fibres and plastics have one common feature. What is it?
Answer» The molecular structures of synthetic fibres and plastics have one common feature. What is it?

Discussion

2052.	What are kerchiefs?
Answer» What are kerchiefs?

Discussion

2053.	Which state of India has network of natural gas pipeline?
Answer» Which state of India has network of natural gas pipeline?

Discussion

2054.	Which of the following represents a displacement reaction?
Answer» Which of the following represents a displacement reaction?

Discussion

2055.	In which part of India was the first oil reserve discovered?
Answer» In which part of India was the first oil reserve discovered?

Discussion

2056.	What is the atomicity of the molecule S8?
Answer» What is the atomicity of the molecule $S_{8}$ ?

Discussion

2057.	From the list given below, pick out the items which can be recycled: Used clothes, polythene carry bags, glass bottles, newspaper
Answer» From the list given below, pick out the items which can be recycled: Used clothes, polythene carry bags, glass bottles, newspaper

Discussion

2058.	Fill in the blanks.(a) Gold of 100% purity is ………… carat gold.(b) Bronze contains the metals ………… and ………… .(c) The ………… gas is released when metals react chemically with acids.(d) Oxides of metals have ………… properties.(e) The non-metal ………… is used in gun powder.
Answer» Fill in the blanks. (a) Gold of 100% purity is ………… carat gold. (b) Bronze contains the metals ………… and ………… . (c) The ………… gas is released when metals react chemically with acids. (d) Oxides of metals have ………… properties. (e) The non-metal ………… is used in gun powder.

2058.

Fill in the blanks.(a) Gold of 100% purity is ………… carat gold.(b) Bronze contains the metals ………… and ………… .(c) The ………… gas is released when metals react chemically with acids.(d) Oxides of metals have ………… properties.(e) The non-metal ………… is used in gun powder.

Answer»

Fill in the blanks.

(a) Gold of 100% purity is ………… carat gold.

(b) Bronze contains the metals ………… and ………… .

(c) The ………… gas is released when metals react chemically with acids.

(d) Oxides of metals have ………… properties.

(e) The non-metal ………… is used in gun powder.

Discussion

2059.	What is Ganga Action Plan ? When and why was it launched ?
Answer» What is Ganga Action Plan ? When and why was it launched ?

Discussion

2060.	Explain, why an organic liquid vaporises at a temperature below its boiling point in its steam distillation?
Answer» Explain, why an organic liquid vaporises at a temperature below its boiling point in its steam distillation?

Discussion

2061.	Why is electron taken as fundamental charge, though quark has a fraction of electronic charge?
Answer» Why is electron taken as fundamental charge, though quark has a fraction of electronic charge?

Discussion

2062.	Which of the following are used in electric water filters to kill all the harmful micro-organisms present in tap water and make it absolutely safe for drinking? (a) infrared radiation (b) gamma radiation (c) visible radiation (d) ultraviolet radiation
Answer» Which of the following are used in electric water filters to kill all the harmful micro-organisms present in tap water and make it absolutely safe for drinking? (a) infrared radiation (b) gamma radiation (c) visible radiation (d) ultraviolet radiation

2062.

Which of the following are used in electric water filters to kill all the harmful micro-organisms present in tap water and make it absolutely safe for drinking? (a) infrared radiation (b) gamma radiation (c) visible radiation (d) ultraviolet radiation

Answer»

Which of the following are used in electric water filters to kill all the harmful micro-organisms present in tap water and make it absolutely safe for drinking?

(a) infrared radiation

(b) gamma radiation

(c) visible radiation

(d) ultraviolet radiation

Discussion

2063.	The kerosene stove is so designed that it gives
Answer» The kerosene stove is so designed that it gives

Discussion

2064.	Biogas mainly consists of:
Answer» Biogas mainly consists of:

Discussion

2065.	Equal weights of hydrogen and ethane are mixed in an empty vessel at 25 degree celcius. What is the total pressure exerted by hydrogen??
Answer» Equal weights of hydrogen and ethane are mixed in an empty vessel at 25 degree celcius. What is the total pressure exerted by hydrogen??

Discussion

2066.	a mixture of an acid anhydride (a) and a monobasic acid (b)on heating produces another monobasic acid (c) of equivalent weight74 and anhydride (d). the acids & anhydrides remain in equilibriu the anhydride (d) contains 2 identical fluoroalkyl groups.the acid (b) contains a trifluoromethyl group &has an eq. wt. 128.give structures of a to d with proper reasoning
Answer» a mixture of an acid anhydride (a) and a monobasic acid (b)on heating produces another monobasic acid (c) of equivalent weight74 and anhydride (d). the acids & anhydrides remain in equilibriu the anhydride (d) contains 2 identical fluoroalkyl groups.the acid (b) contains a trifluoromethyl group &has an eq. wt. 128.give structures of a to d with proper reasoning

Discussion

2067.	For the above balanced equation, ratio of a:c:b should be:
Answer» For the above balanced equation, ratio of a:c:b should be:

2067.

For the above balanced equation, ratio of a:c:b should be:

Answer»

For the above balanced equation, ratio of a:c:b should be:

Discussion

2068.	Question 2 (ii)Write equation for the reaction of calcium and potassium with water.
Answer» Question 2 (ii) Write equation for the reaction of calcium and potassium with water.

Discussion

2069.	What are radicals?
Answer» What are radicals?

Discussion

2070.	How to determine the valency of an element?
Answer» How to determine the valency of an element?

Discussion

2071.	An element X forms an oxide XO3. The valency of element X can be ___.
Answer» An element $X$ forms an oxide $X O_{3}$ . The valency of element X can be ___.

Discussion

2072.	Select an option with a set of two noble metals.
Answer» Select an option with a set of two noble metals.

Discussion

2073.	if we consider that 1/6 in place of 1/12 mass of carbon atom is taken to be the relative atomic mass unit the mass of one mole of substance will be
Answer» if we consider that 1/6 in place of 1/12 mass of carbon atom is taken to be the relative atomic mass unit the mass of one mole of substance will be

Discussion

2074.	Clear and transparent water is always fit and healthy for drinking ?
Answer» Clear and transparent water is always fit and healthy for drinking ?

Discussion

2075.	The smell of hot sizzling food reaches several metres away, but to get the smell from cold food, we have to get closer. Which of the following reason suits the best?
Answer» The smell of hot sizzling food reaches several metres away, but to get the smell from cold food, we have to get closer. Which of the following reason suits the best?

Discussion

2076.	12.5g of a sample of Bleaching powder is treated with excess23of CH3COOH & KI solution. The liberated I, required 50 ml of N/10hypo. The % of available Cl2 in the sample is(1) 3.55(3) 35.5(2) 7.0(4) 28.2
Answer» 12.5g of a sample of Bleaching powder is treated with excess23of CH3COOH & KI solution. The liberated I, required 50 ml of N/10hypo. The % of available Cl2 in the sample is(1) 3.55(3) 35.5(2) 7.0(4) 28.2

Discussion

2077.	Which of the following options can be correctly associated with fuels?
Answer» Which of the following options can be correctly associated with fuels?

Discussion

2078.	What are drying agents, desiccating agents, and dehydrating agents? Explain how they work, their nature, uses, and give examples for the same.
Answer» What are drying agents, desiccating agents, and dehydrating agents? Explain how they work, their nature, uses, and give examples for the same.

Discussion

2079.

Match the following. ‘A’ ‘B’ (a) Mineral oil 1. Buried plants and animals (b) Atomic energy 2. Renewable energy sources (c) Wind energy 3. Uranium (d) Fossil fuel 4. Petrol

Answer»

Match the following.

‘A’		‘B’
(a)	Mineral oil		1.	Buried plants and animals
(b)	Atomic energy		2.	Renewable energy sources
(c)	Wind energy		3.	Uranium
(d)	Fossil fuel		4.	Petrol

Discussion

2080.	Asubstance undergoes first order decomposition. The decomposition follows twoparallel first order reactions as:Thepercentage distribution of B and C are:
Answer» A substance undergoes first order decomposition. The decomposition follows two parallel first order reactions as: The percentage distribution of B and C are:

2080.

Asubstance undergoes first order decomposition. The decomposition follows twoparallel first order reactions as:Thepercentage distribution of B and C are:

Answer»

A
substance undergoes first order decomposition. The decomposition follows two
parallel first order reactions as:

The
percentage distribution of B and C are:

Discussion

2081.	A charge Q is placed at the centre of the open end of a cylindrical vessel. Electric flux through the surface of the vessel is?
Answer» A charge Q is placed at the centre of the open end of a cylindrical vessel. Electric flux through the surface of the vessel is?

Discussion

2082.	Question 25Fill in the blanks and complete the story.About 300 million years ago the earth had dense ___ in low lying wetland areas. Due to natural processes, like ___, these forests got buried under the ___. As more ___ deposited over them, they were compressed. The ___ also rose as they sank deeper and deeper. Under high ___ and high ___, dead plants got slowly converted into coal.
Answer» Question 25 Fill in the blanks and complete the story. About 300 million years ago the earth had dense ___ in low lying wetland areas. Due to natural processes, like ___, these forests got buried under the ___. As more ___ deposited over them, they were compressed. The ___ also rose as they sank deeper and deeper. Under high ___ and high ___, dead plants got slowly converted into coal.

Discussion

2083.	Which of the following metals can be easily cut with a knife?
Answer» Which of the following metals can be easily cut with a knife?

2083.

Which of the following metals can be easily cut with a knife?

Answer»

Which of the following metals can be easily cut with a knife?

Discussion

2084.	A substance x molecular weight=94 associates in water to form dimer. A solution of 1.25 g of x in 50 g of water lower the freezing point by 0.3∘ C, the degree of association of x is (Kf=1.86)
Answer» A substance x $molecular weight = 94$ associates in water to form dimer. A solution of $1.25 g of$ x in $50 g$ of water lower the freezing point by ${0.3}^{\circ} C$ , the degree of association of x is $(K_{f} = 1.86)$

Discussion

2085.	Water has maximum density at:
Answer» Water has maximum density at:

Discussion

2086.	100 mL each of coconut oil and water are taken in two beakers and kept in the freezer.a) What difference can be observed in their volumes during freezing?b) What do you infer from the observation?c) When water is frozen in glass bottles, it is advised not to fill the bottles completely. Explain the reason.
Answer» 100 mL each of coconut oil and water are taken in two beakers and kept in the freezer. a) What difference can be observed in their volumes during freezing? b) What do you infer from the observation? c) When water is frozen in glass bottles, it is advised not to fill the bottles completely. Explain the reason.

Discussion

2087.	Calculate the number of moles of magnesium oxide, MgO in 80g and 10g of the compound. (Average atomic masses of Mg=24 and bO=16)
Answer» Calculate the number of moles of magnesium oxide, MgO in 80g and 10g of the compound. (Average atomic masses of Mg=24 and bO=16)

Discussion

2088.	What are bakelite
Answer» What are bakelite

Discussion

2089.	Water pollution is mainly caused due to
Answer» Water pollution is mainly caused due to

Discussion

2090.	Which of the following method is not employed in the purification of water supplied to our homes?
Answer» Which of the following method is not employed in the purification of water supplied to our homes?

Discussion

2091.	Number of hydrogen atoms in 36 ml of H2o at 277 k are Avogadros number. x is
Answer» Number of hydrogen atoms in 36 ml of H2o at 277 k are Avogadros number. x is

Discussion

2092.	In a chemical reaction, the total mass of the reactants is equal to the total mass of ___
Answer» In a chemical reaction, the total mass of the reactants is equal to the total mass of ___

Discussion

2093.	1. List chemical properties of hydrogen 2. why hydrogen is considered as a clean fuel.
Answer» 1. List chemical properties of hydrogen 2. why hydrogen is considered as a clean fuel.

Discussion

2094.	On heating(Strong) the mixture of powdered iron and copper(\|\|) oxide in a crucible: (A)formation of iron(\|\|)oxide and copper takes place (B)formation of copper(\|\|\|)oxide and iron(\|\|)oxide takes place (C)no reaction takes place
Answer» On heating(Strong) the mixture of powdered iron and copper(\|\|) oxide in a crucible: (A)formation of iron(\|\|)oxide and copper takes place (B)formation of copper(\|\|\|)oxide and iron(\|\|)oxide takes place (C)no reaction takes place

Discussion

2095.

Match the following. ‘A’ ‘B’ (a) Reduction 1. Type of chemical reaction (b) Oxidation 2. Combining with hydrogen (c) Displacement 3. Speeding up a reaction (d) Catalyst 4. Combination with oxygen

Answer»

Match the following.

‘A’		‘B’
(a)	Reduction		1.	Type of chemical reaction
(b)	Oxidation		2.	Combining with hydrogen
(c)	Displacement		3.	Speeding up a reaction
(d)	Catalyst		4.	Combination with oxygen

Discussion

2096.	What is a chemical symbol of an element? What information does it convey?
Answer» What is a chemical symbol of an element? What information does it convey?

Discussion

2097.	what is the difference between ionic bond and covalent bond
Answer» what is the difference between ionic bond and covalent bond

Discussion

2098.	Why chlorine didn't take part in the formation of hydrogen bonding??
Answer» Why chlorine didn't take part in the formation of hydrogen bonding??

Discussion

2099.	Two soap bubbles of radii a and b combine to form a single bubble of radius c. If P is the external pressure, then the surface tension of the soap solution is
Answer» Two soap bubbles of radii $a$ and $b$ combine to form a single bubble of radius $c .$ If $P$ is the external pressure, then the surface tension of the soap solution is

Discussion

2100.	how to find a dative bond?
Answer» how to find a dative bond?

Discussion

Explore topic-wise InterviewSolutions in .

The molecular structures of synthetic fibres and plastics have one common feature. What is it?

What are kerchiefs?

Which state of India has network of natural gas pipeline?

Which of the following represents a displacement reaction?

In which part of India was the first oil reserve discovered?

What is the atomicity of the molecule S8?

From the list given below, pick out the items which can be recycled: Used clothes, polythene carry bags, glass bottles, newspaper

What is Ganga Action Plan ? When and why was it launched ?

Explain, why an organic liquid vaporises at a temperature below its boiling point in its steam distillation?

Why is electron taken as fundamental charge, though quark has a fraction of electronic charge?

Which of the following are used in electric water filters to kill all the harmful micro-organisms present in tap water and make it absolutely safe for drinking? (a) infrared radiation (b) gamma radiation (c) visible radiation (d) ultraviolet radiation

The kerosene stove is so designed that it gives

Biogas mainly consists of:

Equal weights of hydrogen and ethane are mixed in an empty vessel at 25 degree celcius. What is the total pressure exerted by hydrogen??

For the above balanced equation, ratio of a:c:b should be:

Question 2 (ii)Write equation for the reaction of calcium and potassium with water.

What are radicals?

How to determine the valency of an element?

An element X forms an oxide XO3. The valency of element X can be ___.

Select an option with a set of two noble metals.

if we consider that 1/6 in place of 1/12 mass of carbon atom is taken to be the relative atomic mass unit the mass of one mole of substance will be

Clear and transparent water is always fit and healthy for drinking ?

The smell of hot sizzling food reaches several metres away, but to get the smell from cold food, we have to get closer. Which of the following reason suits the best?

12.5g of a sample of Bleaching powder is treated with excess23of CH3COOH & KI solution. The liberated I, required 50 ml of N/10hypo. The % of available Cl2 in the sample is(1) 3.55(3) 35.5(2) 7.0(4) 28.2

Which of the following options can be correctly associated with fuels?

What are drying agents, desiccating agents, and dehydrating agents? Explain how they work, their nature, uses, and give examples for the same.

Match the following. ‘A’ ‘B’ (a) Mineral oil 1. Buried plants and animals (b) Atomic energy 2. Renewable energy sources (c) Wind energy 3. Uranium (d) Fossil fuel 4. Petrol

Asubstance undergoes first order decomposition. The decomposition follows twoparallel first order reactions as:Thepercentage distribution of B and C are:

A charge Q is placed at the centre of the open end of a cylindrical vessel. Electric flux through the surface of the vessel is?

Which of the following metals can be easily cut with a knife?

A substance x molecular weight=94 associates in water to form dimer. A solution of 1.25 g of x in 50 g of water lower the freezing point by 0.3∘ C, the degree of association of x is (Kf=1.86)

Water has maximum density at:

Calculate the number of moles of magnesium oxide, MgO in 80g and 10g of the compound. (Average atomic masses of Mg=24 and bO=16)

What are bakelite

Water pollution is mainly caused due to

Which of the following method is not employed in the purification of water supplied to our homes?

Number of hydrogen atoms in 36 ml of H2o at 277 k are Avogadros number. x is

In a chemical reaction, the total mass of the reactants is equal to the total mass of ___

1. List chemical properties of hydrogen 2. why hydrogen is considered as a clean fuel.

On heating(Strong) the mixture of powdered iron and copper(||) oxide in a crucible: (A)formation of iron(||)oxide and copper takes place (B)formation of copper(|||)oxide and iron(||)oxide takes place (C)no reaction takes place

Match the following. ‘A’ ‘B’ (a) Reduction 1. Type of chemical reaction (b) Oxidation 2. Combining with hydrogen (c) Displacement 3. Speeding up a reaction (d) Catalyst 4. Combination with oxygen

What is a chemical symbol of an element? What information does it convey?

what is the difference between ionic bond and covalent bond

Why chlorine didn't take part in the formation of hydrogen bonding??

Two soap bubbles of radii a and b combine to form a single bubble of radius c. If P is the external pressure, then the surface tension of the soap solution is

how to find a dative bond?