Ozone consists of (1) Oxygen only (2) Oxygen and Nitrogen (3) Hydrogen and Carbon (4) Oxygen and Carbon

Ozone consists of (1) Oxygen only (2) Oxygen and Nitrogen (3) Hydrogen and Carbon (4) Oxygen and Carbon 
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Oxygen only
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Ozone consists of - (1) Oxygen only (2) Oxygen and Nitrogen (3) Hydrogen and Carbon (4) Oxygen and Carbon

Description : Ozone consists of - (1) Oxygen only (2) Oxygen and Nitrogen (3) Hydrogen and Carbon (4) Oxygen and Carbon

Last Answer : (1) Oxygen only Explanation: Ozone (O3), or trioxygen, is a triatomic molecule, consisting of three oxygen atoms. It is an allotrope of oxygen that is much less stable than the ... and also atmospheric electrical discharges, and is present in low concentrations throughout the Earth's atmosphere.

The smog in cities in India mainly consists of (A) Oxides Of sulphur (B) Oxides of nitrogen and unburnt hydrocarbons (C) Carbon monoxide and SPM (D) Oxides of sulphur and ozone

Description : The smog in cities in India mainly consists of (A) Oxides Of sulphur (B) Oxides of nitrogen and unburnt hydrocarbons (C) Carbon monoxide and SPM (D) Oxides of sulphur and ozone

Last Answer : (B) Oxides of nitrogen and unburnt hydrocarbons

(1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, react in the atmosphere in the presence of sunlight containing ultra violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3

Description : (1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, ... violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3

Last Answer : Water is not effective in extinguishing a fire caused by petrol because - (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn

Which two gases are used to disinfect water in sewage treatment facilities? w) helium and nitrogen x) ozone and chlorine y) oxygen and hydrogen z) nitrogen and chlorine

Description : Which two gases are used to disinfect water in sewage treatment facilities? w) helium and nitrogen x) ozone and chlorine y) oxygen and hydrogen z) nitrogen and chlorine 

Last Answer : ANSWER: X -- OZONE AND CHLORINE

Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? (A) Smog & ozone (B) Hydrogen fluoride & nitrogen oxides (C) Sulphur dioxide & spray of weed killers (D) Carbon monoxide

Description : Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? (A) Smog & ozone (B) Hydrogen fluoride & nitrogen oxides (C) Sulphur dioxide & spray of weed killers (D) Carbon monoxide

Last Answer : (D) Carbon monoxide

Which one of the following is a greenhouse gas? (1) Oxygen (2) Nitrogen (3) Carbon-dioxide (4) Ozone

Description : Which one of the following is a greenhouse gas? (1) Oxygen (2) Nitrogen (3) Carbon-dioxide (4) Ozone

Last Answer : (3) Carbon-dioxide Explanation: A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the ... the Earth's atmosphere- are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

Which one of the following is a greenhouse gas? (1) Oxygen (2) Nitrogen (3) Carbon-di-Oxide (4) Ozone

Description : Which one of the following is a greenhouse gas? (1) Oxygen (2) Nitrogen (3) Carbon-di-Oxide (4) Ozone 

Last Answer : Carbon-di-Oxide

Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) oxygen and hydrogen x) ozone and methane y) nitrous oxide and sulfur dioxide z) methane and carbon dioxide e) ozone and carbon monoxide

Description : Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) oxygen and hydrogen x) ozone and methane y) nitrous oxide and sulfur dioxide z) methane and carbon dioxide e) ozone and carbon monoxide

Last Answer : ANSWER: Z -- METHANE AND CARBON DIOXIDE

Ozone-hole in the atmosphere is largely caused by the presence of (1) Oxygen (2) Hydrogen (3) Chloro-floro-carbon (4) Radio-active waste

Description : Ozone-hole in the atmosphere is largely caused by the presence of (1) Oxygen (2) Hydrogen (3) Chloro-floro-carbon (4) Radio-active waste

Last Answer : Chloro-floro-carbon

The most abundant constituent of atmospheric air is – (1) carbon (2) hydrogen (3) oxygen (4) nitrogen

Description : The most abundant constituent of atmospheric air is – (1) carbon (2) hydrogen (3) oxygen (4) nitrogen

Last Answer : (4) nitrogen Explanation: Air is the name given to the atmosphere used in breathing and photosynthesis. Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.

The highest volume of gases in lower atmosphere is comprised of - (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Description : The highest volume of gases in lower atmosphere is comprised of - (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Last Answer : (4) Nitrogen Explanation: There are a number of atmospheric gases which make up air. In the lower atmosphere or troposphere, the main gases are nitrogen and oxygen, which make up 78% and 21% of the volume of air respectively. The remaining 1% of the atmospheric gases is made up of trace gases.

The bubbles in Chanmpagne and Soda are - (1) Nitrogen (2) Oxygen (3) Carbon dioxide (4) Hydrogen

Description : The bubbles in Chanmpagne and Soda are - (1) Nitrogen (2) Oxygen (3) Carbon dioxide (4) Hydrogen

Last Answer : (4) Hydrogen

The most abundant element by number in the living system is : (1) Nitrogen (2) Hydrogen (3) Oxygen (4) Carbon

Description : The most abundant element by number in the living system is : (1) Nitrogen (2) Hydrogen (3) Oxygen (4) Carbon

Last Answer : (2) Hydrogen Explanation: In sequential order, Hydrogen. Oxygen, Carbon and Nitrogen are the most abundant elements by number in the living system. Hydrogen constitutes 49.8% of living systems, while Oxygen ... . It is not surprising, therefore, that the living cell is between 60% and 90% water.

Silver gets corroded due to ______ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Description : Silver gets corroded due to ______ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Last Answer : (2) Hydrogen Sulphide Explanation: Silver is a fairly stable metal and under normal circumstances does not corrode quickly. However, it is particularly susceptible to the effects of the sulfide ... atmosphere, especially in marine environment, and readily forms a surface tarnish of silver sulphide.

The name of unreactive gas is – (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Description : The name of unreactive gas is – (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Last Answer : (3) Nitrogen Explanation: Nitrogen is chemically unreactive because it has a strong triple bond which binds the two nitrogen atoms together making it harder for it to be broken. It does not burn, and at ordinary temperatures it does not react with other elements.

The gas that is used in the manufacture of vanaspati ghee is - (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Description : The gas that is used in the manufacture of vanaspati ghee is - (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Last Answer : (3) Hydrogen 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. ... is for the processing of vegetableoils (fats to give margarine and related spreads and shortenings).

The major constituent of air is – (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Description : The major constituent of air is – (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Last Answer : (1) nitrogen Explanation: Depending on various geographical locationsthese may change, but for the most part air is made up of 78% nitrogen (N2), 21% oxygen (O2), and trace amounts of ... and mostly inert diatomic gas at standard conditions, constituting 78.09% by volume of Earth's atmosphere.

Carbon monoxide is an inflammable gas. Which one of the following is also inflammable? (1) Helium (2) Nitrogen (3) Oxygen (4) Hydrogen

Description : Carbon monoxide is an inflammable gas. Which one of the following is also inflammable? (1) Helium (2) Nitrogen (3) Oxygen (4) Hydrogen

Last Answer : (4) Hydrogen Explanation: At standard temperature and pressure, hydrogen is a colourless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic has with the molecular ... important role in acid-base chemistry with many reactions exchanging protons between soluble molecules.

Two elements which can form a large number of compounds are (1) Carbon and Hydrogen (2) Carbon and Nitrogen (3) Carbon and Oxygen (4) Carbon and Sulphur

Description : Two elements which can form a large number of compounds are (1) Carbon and Hydrogen (2) Carbon and Nitrogen (3) Carbon and Oxygen (4) Carbon and Sulphur

Last Answer : (1) Carbon and Hydrogen Explanation: The carbon-hydrogen bond (C-H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. Compound classes ... bonds are alkanes, alkenes, alkynes, and aromatic hydrocarbons. Collectively they are known as hydrocarbons.

Which of the following is the most common element in the Universe? (1) Nitrogen (2) Oxygen (3) Hydrogen (4) Carbon

Description : Which of the following is the most common element in the Universe? (1) Nitrogen (2) Oxygen (3) Hydrogen (4) Carbon

Last Answer : (3) Hydrogen Explanation: Hydrogen is the most abundant element in the Universe; helium is second.

Which gas is used to manufacture vanaspati from vegetable oil is - (1) carbon dioxide (2) nitrogen (3) oxygen (4) hydrogen

Description : Which gas is used to manufacture vanaspati from vegetable oil is - (1) carbon dioxide (2) nitrogen (3) oxygen (4) hydrogen

Last Answer : (4) hydrogen Explanation: Hydrogen is used to manufacture vanaspati from vegetable oil.

Hydrocarbons are(a) Composed of carbon and hydrogen(b) Composed of carbon, hydrogen, and oxygen(c) Composed of carbon and oxygen(d) Composed of carbon and nitrogen

Description : Hydrocarbons are (a) Composed of carbon and hydrogen (b) Composed of carbon, hydrogen, and oxygen (c) Composed of carbon and oxygen (d) Composed of carbon and nitrogen

Last Answer : Composed of carbon and hydrogen

The most abundant element in the universe is thoug to be: w) carbon x) oxygen y) hydrogen z) nitrogen

Description : The most abundant element in the universe is thoug to be: w) carbon x) oxygen y) hydrogen z) nitrogen

Last Answer : ANSWER: Y -- HYDROGEN

When vinegar and baking soda are mixed together, w gas is formed? w) oxygen x) nitrogen y) carbon dioxide z) hydrogen

Description : When vinegar and baking soda are mixed together, w gas is formed? w) oxygen x) nitrogen y) carbon dioxide z) hydrogen

Last Answer : ANSWER: Y -- CARBON DIOXIDE

All proteins contain at least 5 specific elements. Four of them are carbon, oxygen, hydrogen, and nitrogen. What is the fifth element?

Description : All proteins contain at least 5 specific elements. Four of them are carbon, oxygen, hydrogen, and nitrogen. What is the fifth element?

Last Answer : ANSWER: SULFUR

Silver gets corroded due to ___ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Description : Silver gets corroded due to ___ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Last Answer : Hydrogen Sulphide

The most abundant element by number in the living system is : (1) Nitrogen (2) Hydrogen (3) Oxygen (4) Carbon

Description : The most abundant element by number in the living system is : (1) Nitrogen (2) Hydrogen (3) Oxygen (4) Carbon

Last Answer : Hydrogen

The highest volume of gases in lower atmosphere is comprised of (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Description : The highest volume of gases in lower atmosphere is comprised of (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Last Answer : Nitrogen

The name of unreactive gas is (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Description : The name of unreactive gas is (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Last Answer : Nitrogen

The most abundant constituent of atmospheric air is : (1) carbon (2) hydrogen (3) oxygen (4) nitrogen

Description : The most abundant constituent of atmospheric air is : (1) carbon (2) hydrogen (3) oxygen (4) nitrogen

Last Answer : nitrogen

Two elements which can form a large number of compounds are (1) Carbon and Hydrogen (2) Carbon and Nitrogen (3) Carbon and Oxygen (4) Carbon and Sulphur

Description : Two elements which can form a large number of compounds are (1) Carbon and Hydrogen (2) Carbon and Nitrogen (3) Carbon and Oxygen (4) Carbon and Sulphur

Last Answer : Carbon and Hydrogen

The gas that is used in the manufacture of vanaspati ghee is : (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Description : The gas that is used in the manufacture of vanaspati ghee is : (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Last Answer : Hydrogen

Carbon monoxide is an inflammable gas. Which one of the following is also inflammable? (1) Helium (2) Nitrogen (3) Oxygen (4) Hydrogen

Description : Carbon monoxide is an inflammable gas. Which one of the following is also inflammable? (1) Helium (2) Nitrogen (3) Oxygen (4) Hydrogen

Last Answer : Hydrogen

The major constituent of air is (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Description : The major constituent of air is (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Last Answer : nitrogen

Highest percentage of air consists of A. Oxygen B. Carbon dioxide C. Nitrogen D. Argon

Description : Highest percentage of air consists of A. Oxygen B. Carbon dioxide C. Nitrogen D. Argon

Last Answer : C. Nitrogen

Highest percentage of air consists of A. Oxygen B. Carbon dioxide C. Nitrogen D. Argon

Description : Highest percentage of air consists of A. Oxygen B. Carbon dioxide C. Nitrogen D. Argon

Last Answer : C. Nitrogen

Substances containing all the four elements: carbon, hydrogen nitrogen and oxygen are 1. Morphine 2. Nucleic acids 3. Starch 4. Quinine Select the correct answer by using the code below, (a) 2, 3 and 4 only (b) 1, 2 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Description : Substances containing all the four elements: carbon, hydrogen nitrogen and oxygen are 1. Morphine 2. Nucleic acids 3. Starch 4. Quinine Select the correct answer by using the code below, (a) 2, 3 and 4 only (b) 1, 2 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Last Answer : Ans:(b)

Which are the only two elements on the periodic table that are liquid at room temperature? A. Mercury and Bromine (Answer) B. Carbon and helium C. Nitrogen and Hydrogen D. Oxygen and Neon

Description : Which are the only two elements on the periodic table that are liquid at room temperature? A. Mercury and Bromine (Answer) B. Carbon and helium C. Nitrogen and Hydrogen D. Oxygen and Neon

Last Answer : A. Mercury and Bromine (Answer)

Ozone depletion in the atmosphere is mainly caused by - (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon

Description : Ozone depletion in the atmosphere is mainly caused by - (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon

Last Answer : (4) chlorofluorocarbon Explanation: A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ethane. They contribute to ozone depletion in the upper atmosphere.

Ozone depletion in the atmosphere is mainly caused by (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon

Description : Ozone depletion in the atmosphere is mainly caused by (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon

Last Answer : chlorofluorocarbon

(3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ozone UV absorption is important to life, since it extends the absorption of UV by ordinary oxygen and nitrogen in air (which absorbs all wavelengths < 200 nm) through the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).

Description : (3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ... the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).

Last Answer : The advantage of detergents over soaps is – (1) Detergents are soluble in water (2) Detergents could not give much lather (3) Detergents give lather even with hard water (4) Soaps give lather with only soft water

(3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ozone UV absorption is important to life, since it extends the absorption of UV by ordinary oxygen and nitrogen in air (which absorbs all wavelengths < 200 nm) through the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).

Description : (3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ... the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).

Last Answer : The advantage of detergents over soaps is – (1) Detergents are soluble in water (2) Detergents could not give much lather (3) Detergents give lather even with hard water (4) Soaps give lather with only soft water

The atmospheric gas that is mainly responsible for Green House effect – (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Description : The atmospheric gas that is mainly responsible for Green House effect – (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Last Answer : (4) Carbondioxide Explanation: A greenhouse was (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental ... the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

In upper layer of atmosphere ozone is formed by (1) the action of ultraviolet rays on oxygen (2) the combination of oxygen molecules (3) subjecting oxygen to high pressure (4) the action of nitrogen on oxygen in atmosphere

Description : In upper layer of atmosphere ozone is formed by (1) the action of ultraviolet rays on oxygen (2) the combination of oxygen molecules (3) subjecting oxygen to high pressure (4) the action of nitrogen on oxygen in atmosphere

Last Answer :  the action of ultraviolet rays on oxygen

The atmospheric gas that is mainly responsible for Green House effect : (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Description : The atmospheric gas that is mainly responsible for Green House effect : (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide

Last Answer : Carbondioxide

The greatest number of compounds are formed by the element (a) hydrogen (b) carbon (c) oxygen (d) nitrogen

Description : The greatest number of compounds are formed by the element (a) hydrogen (b) carbon (c) oxygen (d) nitrogen

Last Answer : Ans:(b)

In which of the following groups, are the elements written in the descending order of their respective atomic weights? (a) Nitrogen, carbon, oxygen, hydrogen (b) Oxygen, argon, nitrogen, hydrogen (c) Oxygen, nitrogen, helium, hydrogen (d) Oxygen, nitrogen, helium, bromine

Description : In which of the following groups, are the elements written in the descending order of their respective atomic weights? (a) Nitrogen, carbon, oxygen, hydrogen (b) Oxygen, argon, nitrogen, hydrogen (c) Oxygen, nitrogen, helium, hydrogen (d) Oxygen, nitrogen, helium, bromine

Last Answer : Ans:(c)

Of all the gases present in the air, which one of the following is the highest in percentage? (a) Carbon dioxide (b) Hydrogen (c) Nitrogen (d) Oxygen

Description : Of all the gases present in the air, which one of the following is the highest in percentage? (a) Carbon dioxide (b) Hydrogen (c) Nitrogen (d) Oxygen

Last Answer : Ans:(c)

The atmosphere of the primitive earth before origin of life consisted of: (a) Nitrogen, Oxygen, Ammonia, and Water vapour (b) Methane, Ammonia, Hydrogen, and Water vapour (c) Nitrogen, Oxygen, Water, and Carbon dioxide (d) Ammonia, Water, Oxygen, and Hydrogen

Description : The atmosphere of the primitive earth before origin of life consisted of: (a) Nitrogen, Oxygen, Ammonia, and Water vapour (b) Methane, Ammonia, Hydrogen, and Water vapour (c) Nitrogen, Oxygen, Water, and Carbon dioxide (d) Ammonia, Water, Oxygen, and Hydrogen

Last Answer : Ans:(b)

To carry out photosynthesis plants require – (1) Oxygen (2) Carbon-dioxide (3) Nitrogen (4) Hydrogen

Description : To carry out photosynthesis plants require – (1) Oxygen (2) Carbon-dioxide (3) Nitrogen (4) Hydrogen

Last Answer : (2) Carbon-dioxide Explanation: In photosynthesis, carbon dioxide is converted into sugars in a process called carbon fixation. Carbon fixation is a redox reaction, so photosynthesis needs to ... the electrons needed to convert carbon dioxide into a carbohydrate, which is a reduction reaction.