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

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

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

Last Answer : (3) Lead Explanation: Lead pollution primarily came from cars in the past. Today, lead pollution primarily comes from lead smelters, metal processing plants and incinerators. Deposits of lead in soil can harm both humans and animals by absorbing it into a body.

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

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

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

Last Answer : (3) Lead Explanation: The history of car pollution has been one of air and water contamination followed by regulated improvement. Cars and trucks cause a lot of air the pollution in the world ... . But since leaded gasoline has been phased out, lead emissions have decreased by about 98 percent.

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

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

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

Last Answer : ANSWER: C

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

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

Last Answer : (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 ... pollution is a dangerous form of pollution because of the way lead builds up in our bodies.

The metals commonly used for electroplating are – (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Description : The metals commonly used for electroplating are – (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Last Answer : (2) Chromium, Copper and Nickel Explanation: The process of electroplating takes place as metals in ionic form move from a positive to negative electrode. An electric current passing through the ... ability of metal objects. Plating protects by one of two ways, either sacrificially or mechanically.

The metals commonly used for electroplating are (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Description : The metals commonly used for electroplating are (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium

Last Answer : Chromium, Copper and Nickel

Crystallisation of insulin occurs in the presence of (A) Chromium (B) Copper (C) Zinc (D) Calcium

Description : Crystallisation of insulin occurs in the presence of (A) Chromium (B) Copper (C) Zinc (D) Calcium

Last Answer : Answer : C

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

Last Answer : (1) Mercury Explanation: Mercury causes biomagnification problem in the ecosystem.

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

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

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

Last Answer : (A) Iron

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

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 : an alloy of tin and lead

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

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

Last Answer : Mercury

Certain substances are classified as water pollutants, others as air pollutants and still others as land pollutants. Which of the following pollutes all three parts of our environment? w) fluorocarbons x) smog y) acid rain z) ozone

Description : Certain substances are classified as water pollutants, others as air pollutants and still others as land pollutants. Which of the following pollutes all three parts of our environment? w) fluorocarbons x) smog y) acid rain z) ozone

Last Answer : ANSWER: Y -- ACID RAIN

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : (1) Calcium and Magnesium Explanation: Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.

Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric acid) 7. Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate

Description : Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric ... Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate

Last Answer : 1. Copper oxide - CuO 2. Iron (III) chloride - FeCl3 3. Sodium hydroxide - NaOH 4. Iron (II) sulphide - FeS 5. Lead (II) oxide - PbO 6. Hydrogen nitrate (nitric acid) - HNO3 7. ... ) - H2SO4 8. Calcium hydroxide - Ca(OH)2 9. Magnesium carbonate - MgCO3 10.Ammonium carbonate - (NH4)2CO3

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : Calcium and Magnesium

Which of the following materials are used in the manufacture of pig iron from iron ore? w) Limestone and carbon x) Calcium oxide and oxygen y) Chromium and nickel z) Oxygen and sulfur dioxide

Description : Which of the following materials are used in the manufacture of pig iron from iron ore? w) Limestone and carbon x) Calcium oxide and oxygen y) Chromium and nickel z) Oxygen and sulfur dioxide

Last Answer : ANSWER: W -- LIMESTONE AND CARBON

Which of the following are alloying materials used the manufacture of stainless steel? w) Limestone and carbon x) Calcium oxide and oxygen y) Oxygen and sulfur dioxide z) Chromium and nickel

Description : Which of the following are alloying materials used the manufacture of stainless steel? w) Limestone and carbon x) Calcium oxide and oxygen y) Oxygen and sulfur dioxide z) Chromium and nickel

Last Answer : ANSWER: Z -- CHROMIUM AND NICKEL

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.

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

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

Last Answer : (1) Cadmium Explanation: Itai-itai disease was the documented case of mass cadmium poisoning in Toyama Prefecture, Japan, starting around 1912. The cadmium poisoning caused softening of the bones and kidney ... damage. Itai-itai disease is known as one of the Four Big Pollution Diseases of Japan.

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 

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

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

Last Answer : Cadmium

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

Which kind of cross-country transportation pollutes the least?

Description : Which kind of cross-country transportation pollutes the least?

Last Answer : answer:Your own legs, a bicycle or a horse. Trains next, yes. It will also be a nice opportunity to see the countrysides of america.

Hard water (A) Does not affect the lather formation by soap (B) Is not unfit for drinking purpose (C) Pollutes the water stream (D) All (A), (B) and (C)

Description : Hard water (A) Does not affect the lather formation by soap (B) Is not unfit for drinking purpose (C) Pollutes the water stream (D) All (A), (B) and (C)

Last Answer : (B) Is not unfit for drinking purpose

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

The metal used for making air crafts and rockets is – (1) Lead (2) Aluminium (3) Nickel (4) Copper

Description : The metal used for making air crafts and rockets is – (1) Lead (2) Aluminium (3) Nickel (4) Copper

Last Answer : (3) Nickel Explanation: Nickel-based super alloys are an unusual class of metallic materials with an exceptional combination of high temperature strength, toughness, and resistance to degradation in ... These materials are widely used in aircraft and power-generation turbines, rocket engines, etc.

(i) Copper - Bessemer converter (ii) Iorpn- Blastfurnace (iii) chromium - Aluminothermic process (iv) Tin - Carbon reducaton (v) Zinc -Belgian process

Description : (i) Copper - Bessemer converter (ii) Iorpn- Blastfurnace (iii) chromium - Aluminothermic process (iv) Tin - Carbon reducaton (v) Zinc -Belgian process

Last Answer : (i) Copper - Bessemer converter (ii) Iorpn- Blastfurnace (iii) chromium - Aluminothermic process (iv ... data how many of them are correctly matched ?

In hoemochromatosis, the liver is infiltrated with (A) Copper (B) Iron (C) Manganese (D) Chromium

Description : In hoemochromatosis, the liver is infiltrated with (A) Copper (B) Iron (C) Manganese (D) Chromium

Last Answer : Answer : B

Hypogonadism can occur in deficiency of (A) Copper (B) Chromium (C) Zinc (D) Manganese

Description : Hypogonadism can occur in deficiency of (A) Copper (B) Chromium (C) Zinc (D) Manganese

Last Answer : Answer : C

Metal required for polymerization of insulin is (A) Copper (B) Chromium (C) Cobalt (D) Zinc

Description : Metal required for polymerization of insulin is (A) Copper (B) Chromium (C) Cobalt (D) Zinc

Last Answer : Answer : D

Wilson’s disease is a condition of toxicosis of (A) Iron (B) Copper (C) Chromium (D) Molybdenum

Description : Wilson’s disease is a condition of toxicosis of (A) Iron (B) Copper (C) Chromium (D) Molybdenum

Last Answer : Answer : B

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

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

Last Answer : Ans:(b)

The substances used in the manufacture of stainless steel are 1. Chromium 2. Iron 3. Copper 4. Steel The correct answers are: (a) 1 and 4 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 4

Description : The substances used in the manufacture of stainless steel are 1. Chromium 2. Iron 3. Copper 4. Steel The correct answers are: (a) 1 and 4 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 4

Last Answer : Ans:(a)

In hot wire anemometer used for gas flow measurement, the wire is normally made of (A) Copper(B) Platinum(C) Constantan(D) Chromium

Description : In hot wire anemometer used for gas flow measurement, the wire is normally made of (A) Copper (B) Platinum (C) Constantan (D) Chromium

Last Answer : (B) Platinum

Constituents of stellite are (A) Zinc, copper and nickel (B) Cobalt, chromium and tungsten (C) Zinc, aluminium and nickel (D) Nickel, cobalt and vanadium

Description : Constituents of stellite are (A) Zinc, copper and nickel (B) Cobalt, chromium and tungsten (C) Zinc, aluminium and nickel (D) Nickel, cobalt and vanadium

Last Answer : (B) Cobalt, chromium and tungsten

Stainless steel contains (A) Chromium and nickel (B) Copper (C) Aluminium (D) Vanadium

Description : Stainless steel contains (A) Chromium and nickel (B) Copper (C) Aluminium (D) Vanadium

Last Answer : (A) Chromium and nickel

Inconel is an alloy of (A) Tin, zinc and nicke(B) Iron, nickel and chromium(C) Copper and nickel(D) Copper and tin

Description : Inconel is an alloy of (A) Tin, zinc and nicke (B) Iron, nickel and chromium (C) Copper and nickel (D) Copper and tin

Last Answer : (B) Iron, nickel and chromium

Which metal is added to steel to make it stainless steel? A. Chromium (Answer) B. Aluminium C. Carbon D. Copper

Description : Which metal is added to steel to make it stainless steel? A. Chromium (Answer) B. Aluminium C. Carbon D. Copper

Last Answer : A. Chromium (Answer)

The resistance wire used in a hot wire anemometer for conducting electrical current is made of (A) Copper (B) Tungsten (C) Chromium (D) Aluminium

Description : The resistance wire used in a hot wire anemometer for conducting electrical current is made of (A) Copper (B) Tungsten (C) Chromium (D) Aluminium

Last Answer : (B) Tungsten

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. (A) Chromium (B) Arsenic (C) Copper (D) Manganese

Description : Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. (A) Chromium (B) Arsenic (C) Copper (D) Manganese

Last Answer : (C) Copper

Constituents of stellite are (A) Zinc, copper & nickel (B) Cobalt, chromium & tungsten (C) Zinc, aluminium & nickel (D) Nickel, cobalt & vanadium

Description : Constituents of stellite are (A) Zinc, copper & nickel (B) Cobalt, chromium & tungsten (C) Zinc, aluminium & nickel (D) Nickel, cobalt & vanadium

Last Answer : (B) Cobalt, chromium & tungsten