Of the following, which one pol-lutes the air of a big City? (1) Copper (2) Chromium (3) Lead (4) Cadmium

Of the following, which one pol-lutes the air of a big City? (1) Copper (2) Chromium (3) Lead (4) Cadmium
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(3) Lead Explanation: The most common source of lead air pollution is from metal processing, but there are other manufacturing and industry sources as well. The highest lead air pollution levels are found near battery manufacturing and iron and other metal producing plants. Lead air pollution is a dangerous form of pollution because of the way lead builds up in our bodies.
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Of the following, which one pollutes the air of a big city ? (1) Copper (2) Chromium (3) Lead (4) Cadmium

Description : Of the following, which one pollutes the air of a big city ? (1) Copper (2) Chromium (3) Lead (4) Cadmium

Last Answer : Lead

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Description : Which one of the following metals pollutes the air of a city having large number of automobiles? (1) Cadmium (2) Chromium (3) Lead (4) Copper

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Last Answer : Lead

Which one of the following metals pollutes the air of a city having large number of automobiles? A. Cadmium B. Chromium C. Lead D. Copper

Description : Which one of the following metals pollutes the air of a city having large number of automobiles? A. Cadmium B. Chromium C. Lead D. Copper

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Of the following which one pollutes the air of a big city? (1) Copper (2) Chromium (3) Lead (4) Calcium

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Of the following which one pollutes the air of a big city ? (1) Copper (2) Chromium (3) Lead (4) Calcium

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Which of the following metals causes Itai-Itai disease ? (1) Cadmium (2) Chromium (3) Cobalt (4) Copper

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Stainless steel contains which of the following? (a) Aluminium and Zinc (b) Chromium and Carbon (c) Zinc and Mercury (d) Copper and Cadmium

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Description : Identify the metal which is non toxic in nature. (1) Chromium(2) Gold (3) Cadmium (4) Cobalt

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White metal is an alloy of (A) Lead, tin and cadmium (B) Copper, tin and zinc (C) Copper and lead (D) None of these

Description : White metal is an alloy of (A) Lead, tin and cadmium (B) Copper, tin and zinc (C) Copper and lead (D) None of these

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Most hazardous metal pollutant of automobile exhausts is (a) mercury (b) cadmium (c) lead (d) copper.

Description : Most hazardous metal pollutant of automobile  exhausts is (a) mercury (b) cadmium (c) lead (d) copper.

Last Answer : (c) lead

Most hazardous metal pollutant of automobile exhausts is (a) mercury (b) cadmium (c) lead (d) copper.

Description : Most hazardous metal pollutant of automobile exhausts is (a) mercury (b) cadmium (c) lead (d) copper.

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Which of the following metals contribute to to biomagnifications problem in the ecosystem? (1) Mercury (2) Chromium (3) (4) Copper (4) (4) Lead

Description : Which of the following metals contribute to to biomagnifications problem in the ecosystem? (1) Mercury (2) Chromium (3) (4) Copper (4) (4) Lead

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Description : A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium

Last Answer : (2) an alloy of tin and lead Explanation: Electric fuse wire is an alloy made of tin (63 % lead 37 %. The cross sectional area determines the melting point at a certain current. Alloys (e.g. ... resulting combination of good conductivity (due to the tin) with a low melting point due to the lead).

Invar used in thermocouples is an alloy of nickel and (A) Iron (B) Copper (C) Chromium (D) Lead

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Which of the following metals contribute to to biomagnification problem in the ecosystem ? (1) Mercury (2) Chromium (4) Copper (4) Lead

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Last Answer : Mercury

The anode in a dry cell consists of – (1) Copper (2) Zinc (3) Cadmium (4) Graphite

Description : The anode in a dry cell consists of – (1) Copper (2) Zinc (3) Cadmium (4) Graphite

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Whic of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc.? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

Description : Whic of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc.? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

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In a nuclear reactor the material use for absorbing neutrons is (1) zinc (2) radium (3) lead (4) cadmium

Description : In a nuclear reactor the material use for absorbing neutrons is (1) zinc (2) radium (3) lead (4) cadmium

Last Answer : cadmium

The anode of a dry cell is made up of (1) Iron (2) Cadmium (3) Zinc (4) Lead

Description : The anode of a dry cell is made up of (1) Iron (2) Cadmium (3) Zinc (4) Lead

Last Answer : Zinc

Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

Description : Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

Last Answer : Nickel and cadmium

Black-pol is available in which country ?

Description : Black-pol is available in which country ?

Last Answer : It is located on the shores of the Irish Sea in northwestern England. References: Wikipedia.

Why was each Greek pol is like a tiny independent country?

Description : Why was each Greek pol is like a tiny independent country?

Last Answer : Feel Free to Answer

The compound used in tooth paste as pol- ishing agent?

Description : The compound used in tooth paste as pol- ishing agent?

Last Answer : Calcium carbonate

INTER POL stands for: a) International Police b) Internal Polythims c) Internet Protocol d) None of These

Description : INTER POL stands for: a) International Police b) Internal Polythims c) Internet Protocol d) None of These

Last Answer : a) International Police

INTER POL stands for: a) International Police b) Internal Polythims c) Internet Protocol d) None of These

Description : INTER POL stands for: a) International Police b) Internal Polythims c) Internet Protocol d) None of These

Last Answer : a) International Police

Stainless steel is usually made by alloying the steel with – (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Description : Stainless steel is usually made by alloying the steel with – (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Last Answer : (3) chromium and nickel Explanation: In metallurgy, stainless steel is defined as a steel alloy with a minimum of 10.5 per cent to 11 per cent chromium content by mass. There are ... virtually nonmagnetic and less brittle at low temperatures. For greater hardness and strength, more carbon is added.

Manganite is an ore/mineral of ______. (1) Beryllium (2) Chromium (3) Manganese (4) Copper

Description : Manganite is an ore/mineral of ______. (1) Beryllium (2) Chromium (3) Manganese (4) Copper

Last Answer : (3) Manganese Explanation: Manganite is an ore mineral of manganese. As a manganese ore, it ranks after pyrolusite and romanechite.

Why for chromium plating iron is firstly platted by copper or nickel?

Description : Why for chromium plating iron is firstly platted by copper or nickel?

Last Answer : Ans: Because chromium metal doesn’t adhere directly to the iron properly so it is firstly plated with nickel or copper.

Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium

Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium

Last Answer : ANSWER: Z -- SODIUM

Stainless steel is usually made by alloying the steel with (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Description : Stainless steel is usually made by alloying the steel with (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper

Last Answer : chromium and nickel 

Galvanization of iron is carried out using (1) Zinc (2) Tin (3) Copper (4) Chromium

Description : Galvanization of iron is carried out using (1) Zinc (2) Tin (3) Copper (4) Chromium

Last Answer : Zinc

Absorption of calcium decreases if there is high concentration in the diet of (A) Copper (B) Sodium (C) Magnesium (D) Cadmium

Description : Absorption of calcium decreases if there is high concentration in the diet of (A) Copper (B) Sodium (C) Magnesium (D) Cadmium

Last Answer : Answer : C

Which of the following materials is used for overhead transmission lines ? (a) Steel cored aluminium (b) Galvanised steel (c) Cadmium copper (d) Any of the above

Description : Which of the following materials is used for overhead transmission lines ? (a) Steel cored aluminium (b) Galvanised steel (c) Cadmium copper (d) Any of the above

Last Answer : (d) Any of the above

The I.C Chip used in a computer is made up of - (1) Silicon (2) Chromium (3) Gold (4) Lead

Description : The I.C Chip used in a computer is made up of - (1) Silicon (2) Chromium (3) Gold (4) Lead

Last Answer : (1) Silicon Explanation: An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material that is normally silicon.

The metal, used to galvanise iron to protect it from rusting is - (1) Zine (2) Chromium (3) Lead (4) Antimony

Description : The metal, used to galvanise iron to protect it from rusting is - (1) Zine (2) Chromium (3) Lead (4) Antimony

Last Answer : (1) Zine Explanation: Galvanization is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. Although galvanization can be done with electrochemical and electro- ... is hot-dip galvanization, in which steel parts are submerged in a bath of molten zinc.

The metal, used to galvanise iron to protect it from rusting is (1) Zinc (2) Chromium (3) Lead (4) Antimony

Description : The metal, used to galvanise iron to protect it from rusting is (1) Zinc (2) Chromium (3) Lead (4) Antimony

Last Answer : Zinc

Which of the toxic heavy metals is found in modern tannery industries ? (1) Nickel (2) Zinc (3) Chromium(4) Lead

Description : Which of the toxic heavy metals is found in modern tannery industries ? (1) Nickel (2) Zinc (3) Chromium(4) Lead

Last Answer : Chromium

Minamata disease was caused by: (1) Mercury (2) Lead (3) Cadmium (4) Zinc

Description : Minamata disease was caused by: (1) Mercury (2) Lead (3) Cadmium (4) Zinc

Last Answer : (1) Mercury Explanation: Minamata disease is a neurological syndrome caused by severe mercury poisoning. Symptoms include ataxia, numbness in the hands and feet, general muscle weakness, narrowing of the ... speech. It was first discovered in Minamata city in Kumamoto prefecture, Japan, in 1956.

At high discharge rates, nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. require fewer cells for the same voltage and less mounting space B. are able to produce higher voltages and do not have to be charged as often C. can be charged and discharged many times without much damage D. have no individual cells to replace at the end of useful life

Description : At high discharge rates, nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. require fewer cells for the same voltage and less mounting space B. are able to ... times without much damage D. have no individual cells to replace at the end of useful life

Last Answer : Answer: C

Nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. put out higher voltages and require no maintenance B. can remain idle and keep a full charge for a long time C. need fewer cells in series and use less mounting space D. all of the above

Description : Nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. put out higher voltages and require no maintenance B. can remain idle and keep a full charge for a long time C. need fewer cells in series and use less mounting space D. all of the above

Last Answer : Answer: B

The plates of a NiCad storage battery are made of ________. A. potassium hydroxide with a small amount of sulfuric acid B. lead and lead peroxide C. silver oxide and lead sulfate D. combinations of nickel powder and nickel & cadmium salts

Description : The plates of a NiCad storage battery are made of ________. A. potassium hydroxide with a small amount of sulfuric acid B. lead and lead peroxide C. silver oxide and lead sulfate D. combinations of nickel powder and nickel & cadmium salts

Last Answer : Answer: D