How is the presence of SO2 detected ?

Last Answer : Ans – PCl5 has a trigonal bipyramidal structure and the three equatorial p-cl bonds are equivalent . while trhe two axial bonds are different and longer than equatorial bonds.

Why is fluorine stronger Oxidising agent ?

Description : Why is fluorine stronger Oxidising agent ?

Last Answer : Ans: Due to (a) Low enthalpy of dissociation (b) high enthalpy of Hydration of F-

Halogens have maximum negative electron gain enthalpy in the respective periods in the P. T Why ?

Description : Halogens have maximum negative electron gain enthalpy in the respective periods in the P. T Why ?

Last Answer : Ans Due to smallest size and high effective nuclear charge , readily accept one electron to acquire noble gas electronic configuration

Which forms of Sulphur show paramagnetic behaviour ?

Description : Which forms of Sulphur show paramagnetic behaviour ?

Last Answer : Ans : In Vapour State sulphurPartly exists as S2 molecule which has two unpaired electrons in the * Orbitals hence exhibit paramagnetic

Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Description : Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Last Answer : Ans: i) Hydrogen bond is found in H2O but not in H2S. ii) Hydrogen bond is found in NH3 but not in PH3. iii) Because they have low ionization energy.

Find hybridization and shape i) XeF2 ii) XeO3 iii) XeF4

Description : Find hybridization and shape i) XeF2 ii) XeO3 iii) XeF4

Last Answer : Ans: i) sp3d, Linear ii) sp3, Pyramidal iii) sp3d2 , Square planar

How is ammonia prepared? Write chemical reaction involved in the Haber’s process.

Description : How is ammonia prepared? Write chemical reaction involved in the Haber’s process.

Last Answer : i) Ammonia is prepared by the combination of hydrogen and nitrogen in the ratio of 3:1. ii) The used catalyst is iron oxide. The promotors are potassium and aluminium oxides. iii) The required conditions are high pressure and moderate temperature. N2 + 3H2 → 2NH3

Nitrogen shows anomalous behaviour in the group. Why?

Description : Nitrogen shows anomalous behaviour in the group. Why?

Last Answer : Ans: i) Small size ii) High electro negativity iii) Absence of vacant d-orbital.

Give reasons: a) Phosphorous pentachloride is unstable. b) Phosphorous trichloride fumes in moisture.

Description : Give reasons: a) Phosphorous pentachloride is unstable. b) Phosphorous trichloride fumes in moisture.

Last Answer : Ans: a) Because of two longer axial bonds. b) Because it reacts with water and forms hydrochloric acid.

Ortho phosphoric acid is triprotic but phosphoric acid is diprotic. Why?

Description : Ortho phosphoric acid is triprotic but phosphoric acid is diprotic. Why?

Last Answer : Ans: Because of their structures ortho phosphoric acid and phosphoric acid have three and two ionisable hydrogen.

Write shape of following molecules: a) Ammonia b) Phosphorous Pentachloride

Description : Write shape of following molecules: a) Ammonia b) Phosphorous Pentachloride

Last Answer : Ans: a) Pyramidal b) Trigonal bipyramidal

Ammonia is water soluble. Why?

Description : Ammonia is water soluble. Why?

Last Answer : Ans: It forms hydrogen bond with water.

Why is Nitrogen relatively inert?

Description : Why is Nitrogen relatively inert?

Last Answer : Ans: Because of a triple bond with high bond energy.

Why Nitrogen is a gas whereas Phosphorous is a solid?

Description : Why Nitrogen is a gas whereas Phosphorous is a solid?

Last Answer : Ans: Nitrogen molecules have less Vander Waal’s forces of attraction whereas molecular phosphorous has more Vander Waal’s forces of attraction.

Why is Ammonia a good complexing agent?

Description : Why is Ammonia a good complexing agent?

Last Answer : Ans: Because of lone pair of electrons on N.

Why is phosphine weaker base than Ammonia?

Description : Why is phosphine weaker base than Ammonia?

Last Answer : Ans: P is bigger than N, therefore lone pair of electrons are less available on P than N.

Presence of arginine can be detected by (A) Sakaguchi reaction (B) Million-Nasse reaction (C) Hopkins-Cole reaction (D) Gas chromatography

Description : Presence of arginine can be detected by (A) Sakaguchi reaction (B) Million-Nasse reaction (C) Hopkins-Cole reaction (D) Gas chromatography

Last Answer : Answer : A

The presence of free ammonia in sewage, is detected by A. Boiling B. Adding potassium permanganate C. Adding sulphuric acid D. Phenol-di-sulphuric acid

Description : The presence of free ammonia in sewage, is detected by A. Boiling B. Adding potassium permanganate C. Adding sulphuric acid D. Phenol-di-sulphuric acid

Last Answer : ANS: A

The effect of corona can be detected by (a) presence of ozone detected by odour (b) hissing sound (c) faint luminous glow of bluish colour (d) all of the above

Description : The effect of corona can be detected by (a) presence of ozone detected by odour (b) hissing sound (c) faint luminous glow of bluish colour (d) all of the above

Last Answer : (d) all of the above

Presence of SO2 in furnace gases attacks the ferrous metal by way of (A) Accelerating the rate of scaling (B) Causing metal embrittlement (C) Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature (D) All (A), (B) and (C)

Description : Presence of SO2 in furnace gases attacks the ferrous metal by way of (A) Accelerating the rate of scaling (B) Causing metal embrittlement (C) Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of (A) CO2 (B) SO2 (C) Hydrocarbons (D) CFC (chloro fluoro carbon)

Description : Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of (A) CO2 (B) SO2 (C) Hydrocarbons (D) CFC (chloro fluoro carbon)

Last Answer : (D) CFC (chloro fluoro carbon)

Smog is not formed due to the presence of __________ in the atmosphere. (A) SO2 (B) NOx (C) CO2 (D) Any of these

Description : Smog is not formed due to the presence of __________ in the atmosphere. (A) SO2 (B) NOx (C) CO2 (D) Any of these

Last Answer : (C) CO2

Which of the statements is false regarding chiral compounds? (a) rotate the plane of polarized light (b) have cis and trans isomers (c) exist as enantiomers (d) can be detected with a polarimeter

Description : Which of the statements is false regarding chiral compounds? (a) rotate the plane of polarized light (b) have cis and trans isomers (c) exist as enantiomers (d) can be detected with a polarimeter

Last Answer : have cis and trans isomers

(3) Oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of oxides of Sulfur and Nitrogen (Sulfur Dioxide and Nitrogen Oxide), which react with the water molecules in the atmosphere to produce acids. The emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) result from fossil fuel combustion.

Description : (3) Oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of oxides of Sulfur and Nitrogen (Sulfur Dioxide and Nitrogen Oxide), which react with the water molecules in the ... The emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) result from fossil fuel combustion.

Last Answer : (3) live wire and the neutral wire Explanation: Three wires enter most homes from the power pole-two "hot" wires and a third "neutral" wire. Each hot wire provides 120- volt current for ... the main switch is put off because the electric circuit (the path where the electricity travels) gets opened.

What are the components responsible for acid rain? (1) Nitrogen monoxide (NO) and Carbon monoxide (CO) (2) Sulphur dioxide (SO2) and Nitrogen oxides (NOx) (3) Carbon dioxide (CO2) and Carbon monoxide (CO) (4) Oxides of carbon (COx) and Oxides of nitrogen (NOx)

Description : What are the components responsible for acid rain? (1) Nitrogen monoxide (NO) and Carbon monoxide (CO) (2) Sulphur dioxide (SO2) and Nitrogen oxides (NOx) (3) Carbon dioxide (CO2) and Carbon monoxide (CO) (4) Oxides of carbon (COx) and Oxides of nitrogen (NOx)

Last Answer : (2) Sulphur dioxide (SO2) and Nitrogen oxides (NOx) Explanation: Acid rain is caused by emissions of sulfur dioxide (SO2) and nitrogen oxide (NO), which react with the water molecules in the ... in acid rain can cause paint to peel, corrosion of steel structures and weathering of stone buildings.

When a lead storage battery is discharged - (1) SO2 is evolved (2) Lead sulphate is consumed (3) Lead is formed (4) Sulphuric acid is consumed

Description : When a lead storage battery is discharged - (1) SO2 is evolved (2) Lead sulphate is consumed (3) Lead is formed (4) Sulphuric acid is consumed

Last Answer : (4) Sulphuric acid is consumed Explanation: Lead storage battery was invented by French physicist Gaston Plante in 1859. In the discharged state both the positive and negative plates become lead sulphate and the electrolyte loses much of its dissolved sulphuric acid and becomes primarily water.

Aerated water contains – (1) SO2 (2) NO2 (3) NO2 (4) CO2

Description : Aerated water contains – (1) SO2 (2) NO2 (3) NO2 (4) CO2

Last Answer : (4) CO2 Explanation: Aerated water is, correctly speaking, water to which air is added. So aerated water is any water artificially impregnated with a large amount of has (as carbon dioxide). The term is, however, frequently applied to carbonated water.

Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful (1) solar ultraviolet radiation (2) solar infrared radiation (3) CO2 in the air (4) SO2 in the air

Description : Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful (1) solar ultraviolet radiation (2) solar infrared radiation (3) CO2 in the air (4) SO2 in the air

Last Answer : (1) solar ultraviolet radiation Explanation: Ozone layer serves as a protective shield against harmful solar ultraviolet radiation.

Acid rain is caused by - (1) SO2 and particulates (2) (2) NO2 and particulates (3) (8) CO2 and CFCs (4) (4) SO2 and NO2

Description : Acid rain is caused by - (1) SO2 and particulates (2) (2) NO2 and particulates (3) (8) CO2 and CFCs (4) (4) SO2 and NO2

Last Answer : (4) SO2 and NO2 Explanation: Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). Acid ... sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.

Which gas is used for converting vegetable oils into saturated fats? (1) H2 (2) O2 (3) Cl2 (4) SO2

Description : Which gas is used for converting vegetable oils into saturated fats? (1) H2 (2) O2 (3) Cl2 (4) SO2

Last Answer : (1) H2 Explanation: Hydrogenation - to treat with hydrogen - is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst. ... oils are derived from polyunsaturated fatty acids (containing more than one carbon-carbon double bonds).

The pollutant responsible for ozone holes is - (1) CO2 (2) SO2 (3) CO (4) CFC

Description : The pollutant responsible for ozone holes is - (1) CO2 (2) SO2 (3) CO (4) CFC

Last Answer : (4) CFC Explanation: Chlorofluorocarbons (CFCs) have been held responsible for the depletion of ozone layer. The manufacture of CFCs has been phased out under the Montreal Protocol, and they are being replaced with other products such as HFCs.

Interveinal necrotic spots on leaves appear due to – (1) HF injuly (2) SO2 injury (3) NO2 injury (4) O3 injury

Description : Interveinal necrotic spots on leaves appear due to – (1) HF injuly (2) SO2 injury (3) NO2 injury (4) O3 injury

Last Answer : (2) SO2 injury Explanation: Injury caused by sulphur oxides show interveinal necrotic areas that are light tan to white. Uninjured tissue new to the veins remains green.

The major use of sulphur is in the manufacture of – (1) H2SO4 (2) H2S (3) SO2 (4) Fungicide

Description : The major use of sulphur is in the manufacture of – (1) H2SO4 (2) H2S (3) SO2 (4) Fungicide

Last Answer : (1) H2SO4 Explanation: The major use of sulphur is in the manufacture of sulphuric acid (H2SO4) which is one of the most important compounds made by the chemical industry. It is used to make, literally, hundreds of compounds needed by almost every industry.

Mark the compound which possesses ionic, covalent and coordinate bonds. (1) NH4C1 (2) SO3 (3) SO2 (4) H2O

Description : Mark the compound which possesses ionic, covalent and coordinate bonds. (1) NH4C1 (2) SO3 (3) SO2 (4) H2O

Last Answer : (1) NH4C1 Explanation: Ammonium chloride (NH4Cl) is generally considered as an ionic compound but this compound has three different types of bond.

Pollutant from motor car exhaust that causes mental disease is – (1) Lead (2) NO2 (3) SO2 (4) Hg

Description : Pollutant from motor car exhaust that causes mental disease is – (1) Lead (2) NO2 (3) SO2 (4) Hg

Last Answer : (1) Lead Explanation: Lead poisoning is a medical condition caused by increased levels of the heavy metal lead in the body. Lead interferes with a variety of body processes and is toxic to ... It interferes with the development of the nervous system, and is therefore particularly toxic to children.

Major gaseous pollutant of the thermal power station is – (1) H2S (2) NH3 (3) NO2 (4) SO2

Description : Major gaseous pollutant of the thermal power station is – (1) H2S (2) NH3 (3) NO2 (4) SO2

Last Answer : (4) SO2 Explanation: A flue-gas stack is a type of chimney, a vertical pipe, channel or similar structure through which combustion product gases called flue gases are exhausted to the outside air ... CO2) and water vapor as well as nitrogen and excess oxygen remaining from the intake combustion air.

Supersonic jet causes pollution by thinning of - (1) O3 layer (2) O2 layer (3) SO2 layer (4) CO2 layer

Description : Supersonic jet causes pollution by thinning of - (1) O3 layer (2) O2 layer (3) SO2 layer (4) CO2 layer

Last Answer : (1) O3 layer Explanation: Three forms (or allotropes) of oxygen are involved in the ozone-oxygen cycle: oxygen atoms (O or atomic oxygen), oxygen has (O2 or diatomic oxygen), and ... oxygen radicals. The atomic oxygen radicals then combine with separate O2 molecules to create two O3 molecules.

Why is CO2 a linear molecule while SO2 a non-linear molecule?

Description : Why is CO2 a linear molecule while SO2 a non-linear molecule?

Last Answer : Ans. In SO2 molecule there are two bond pairs and one lone pair of electron .Due to repulsion by lone pair its bond angle decreases from 120° to 119.5° hence it is not linear whereas in CO2 molecule there is no lone pair of electron due to which it has linear geometry.

Suggest the expected shape of the following molecules with reasons a.SO2 b.NH3

Description : Suggest the expected shape of the following molecules with reasons a.SO2 b.NH3

Last Answer : Ans.(a) In SO2 molecule there are three electron pairs .the three electron pairs should acquire trigonal planar arrangement with bond angle 120 ° .Since one of the position is occupied by lone pair the geometry ... to 107 ^0 from 109.5^ 0 and hence the geometry of ammonia is regarded as pryamidal.

. Which of the following reagents will react with furan to form 2-furansulfonic acid? (a) SO3 in pyridine at 100°C (b) Dilute H2SO4 at 200°C (c) SO2 at 100°C (d) Dilute H2SO4 at 100°C

Description : Which of the following reagents will react with furan to form 2-furansulfonic acid? (a) SO3 in pyridine at 100°C (b) Dilute H2SO4 at 200°C (c) SO2 at 100°C (d) Dilute H2SO4 at 100°C

Last Answer : SO3 in pyridine at 100°C

Which of the following molecules is linear? w) SO2 x) O3 y) XeF2 z) H2S

Description : Which of the following molecules is linear? w) SO2 x) O3 y) XeF2 z) H2S

Last Answer : ANSWER: Y -- XeF2

What are the components responsible for acid rain? (1) Nitrogen monoxide (NO) and Carbon monoxide (CO) (2) Sulphur dioxide (SO2 ) and Nitrogen oxides (NOx ) (3) Carbon dioxide (CO2 ) and Carbon monoxide (CO) (4) Oxides of carbon (COx ) and Oxides of nitrogen (NOx )

Description : What are the components responsible for acid rain? (1) Nitrogen monoxide (NO) and Carbon monoxide (CO) (2) Sulphur dioxide (SO2 ) and Nitrogen oxides (NOx ) (3) Carbon dioxide (CO2 ) and Carbon monoxide (CO) (4) Oxides of carbon (COx ) and Oxides of nitrogen (NOx )

Last Answer : Sulphur dioxide (SO2 ) and Nitrogen oxides (NOx )

The pollutant responsible for ozone holes is _____. (1) CO2 (2) SO2 (3) CO (4) CFC

Description : The pollutant responsible for ozone holes is _____. (1) CO2 (2) SO2 (3) CO (4) CFC

Last Answer : CFC

Interveinal necrotic spots on leaves appear due to (1) HF injury (2) SO2 injury (3) NO2 injury (4) O3 injury

Description : Interveinal necrotic spots on leaves appear due to (1) HF injury (2) SO2 injury (3) NO2 injury (4) O3 injury

Last Answer : SO2 injury

Aerated water contains (1) SO2 (2) NO2 (3) H2 (4) CO2

Description : Aerated water contains (1) SO2 (2) NO2 (3) H2 (4) CO2

Last Answer : CO2

Acid rain is caused by (1) SO2 and particulates (2) NO2 and particulates (3) CO2 and CFCs (4) SO2 and NO2

Description : Acid rain is caused by (1) SO2 and particulates (2) NO2 and particulates (3) CO2 and CFCs (4) SO2 and NO2

Last Answer : SO2 and NO2

anonymous · Answer 1 · 2021-12-06T03:22:22+0000

Ans : 1. It has pungent characteristic smell . 2. It decolourises KMn O4 solution 3. It turns acidified K2 Cr2 O7 green

How is the presence of SO2 detected ?

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