Which one of the following elements shows variable equivalent mass? (1) Zinc (2) Silver (3) Calcium (4) Iron

Which one of the following elements shows variable equivalent mass? (1) Zinc (2) Silver (3) Calcium (4) Iron
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(4) Iron
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Which of the following elements has the lowest melting point? (1) Bromine (2) Zinc (3) Calcium (4) Lead

Description : Which of the following elements has the lowest melting point? (1) Bromine (2) Zinc (3) Calcium (4) Lead

Last Answer : (1) Bromine Explanation: Bromine is a chemical element with symbol Br and atomic number 35. Thus, the melting and boiling points of bromine are intermediate between those of chlorine and iodine.

Which among the following metal is used for galvanization? (1) Zinc (2) Copper (3) Iron (4) Silver

Description : Which among the following metal is used for galvanization? (1) Zinc (2) Copper (3) Iron (4) Silver

Last Answer : (1) Zinc Explanation: Galvanization is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc.

Galvanised Iron sheets have a coating of------ A. Tin B. Silver C. Zinc (Answer) D. Chromium

Description : Galvanised Iron sheets have a coating of------ A. Tin B. Silver C. Zinc (Answer) D. Chromium

Last Answer : C. Zinc (Answer)

Which of the following is the best conductor of electricity? (1) Zinc (2) Copper (3) Gold (4) Silver

Description : Which of the following is the best conductor of electricity? (1) Zinc (2) Copper (3) Gold (4) Silver

Last Answer : (4) Silver Explanation: Copper and Silver Are Most Common. Silver is the best conductor of electricity because it contains a higher number of movable atoms (free electrons).

Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Description : Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Last Answer : Answer : C

Metal present in blood is – (1) Calcium (2) Zinc (3) Sodium (4) Iron

Description : Metal present in blood is – (1) Calcium (2) Zinc (3) Sodium (4) Iron

Last Answer : (4) Iron Explanation: Iron is an essential part of the proteins that transport oxygen in the body. Hemoglobin, the oxygencanying protein in red blood cells, accounts for about two-thirds ... , the protein that supplies oxygen to muscles, and in enzymes needed for various biochemical reactions.

The element which is rich in most leafy vegetables is (1) Phosphorous (2) Zinc (3) Iron (4) Calcium

Description : The element which is rich in most leafy vegetables is (1) Phosphorous (2) Zinc (3) Iron (4) Calcium

Last Answer : (3) Iron Explanation: Green leafy vegetables are rich in iron as well as calcium. For example, Spinach is a dark, leafy green vegetable which is high in iron. One cup of cooked spinach ... of many proteins, including hemoglobin, which helps red blood cells deliver oxygen to all areas of the body

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.

Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Description : Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Last Answer : (c) phosphorus, potassium, sulphur, calcium

Metal present in blood is (1) Calcium (2) Zinc (3) Sodium (4) Iron

Description : Metal present in blood is (1) Calcium (2) Zinc (3) Sodium (4) Iron

Last Answer : Iron

The element which is rich in most leafy vegetables is (1) Phosphorous (2) Zinc (3) Iron (4) Calcium

Description : The element which is rich in most leafy vegetables is (1) Phosphorous (2) Zinc (3) Iron (4) Calcium

Last Answer : Iron

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 metal is protected by the layer of its own oxide? (A) Iron (B) Silver (C) Calcium (D) Aluminium

Description : Which metal is protected by the layer of its own oxide? (A) Iron (B) Silver (C) Calcium (D) Aluminium

Last Answer : (D) Aluminium

All following are essential trace elements except (A) Iron (B) Iodine (C) Zinc (D) Cadmium

Description : All following are essential trace elements except (A) Iron (B) Iodine (C) Zinc (D) Cadmium

Last Answer : Answer : D

Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride

Description : Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride

Last Answer : (c) Magnesium

Match the following concerning essential elements and their functions in plants. Column-I Column-II (A) Iron (i) Photolysis of water (B) Zinc (ii) Pollen germination (C) Boron (iii) Required for chlorophyll biosynthesis (D) Manganese (iv) IAA biosynthesis

Description : Match the following concerning essential elements and their functions in plants. Column-I Column-II (A) Iron (i) Photolysis of water (B) Zinc (ii) Pollen germination (C) Boron (iii) Required for chlorophyll biosynthesis (D) Manganese (iv) IAA biosynthesis

Last Answer : (c) (iii) (iv) (ii) (i)

The metal used to make lightning conductors is – (1) Iron (2) Aluminum (3) Copper (4) Zinc

Description : The metal used to make lightning conductors is – (1) Iron (2) Aluminum (3) Copper (4) Zinc

Last Answer : (3) Copper Explanation: A lightning rod is a metal rod or metallic object mounted on top of a building, electrically bonded using a wire or electrical conductor to interface with ground or "earth" ... wire, instead of passing through the building, where it could start a fire or cause electrocution.

The method of protecting iron from rusting, by coating a thin layer of Zinc is called - (1) Galvanizing (2) rancidity (3) Alloy (4) Pulverizing

Description : The method of protecting iron from rusting, by coating a thin layer of Zinc is called - (1) Galvanizing (2) rancidity (3) Alloy (4) Pulverizing

Last Answer : (1) Galvanizing Explanation: Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting.

The metal used to make lightning conductors is (1) Iron (2) Aluminium (3) Copper (4) Zinc

Description : The metal used to make lightning conductors is (1) Iron (2) Aluminium (3) Copper (4) Zinc

Last Answer : Copper

There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as (a) isotones (b) isochores (c) isobars (d) isotopes

Description : There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as (a) isotones (b) isochores (c) isobars (d) isotopes

Last Answer : Ans:(c)

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and (a) sulphur and magnesium (b) magnesium and sodium (c) calcium and phosphorus (d) phosphorus and sulphur.

Description : About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and (a) sulphur and magnesium (b) magnesium and sodium (c) calcium and phosphorus (d) phosphorus and sulphur.

Last Answer : (d) phosphorus and sulphur.

Which of the following is true regarding Newland’s Law of Octaves? (1) It worked well with only lighter elements. (2) It was applicable only up to calcium. (3) Both are correct (4) Both are incorrect. (4)

Description : Which of the following is true regarding Newland’s Law of Octaves? (1) It worked well with only lighter elements. (2) It was applicable only up to calcium. (3) Both are correct (4) Both are incorrect. (4)

Last Answer : (3) Both are correct Explanation: Both the statements are correct. Hence, option C is correct.

The mass of water vapour per unit volume of air is known as - (1) relative humidity (2) specific humidity (3) absolute humidity (4) variable humidity

Description : The mass of water vapour per unit volume of air is known as - (1) relative humidity (2) specific humidity (3) absolute humidity (4) variable humidity

Last Answer : (3) absolute humidity Explanation: Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air (g/m3).

Which °fine metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Description : Which °fine metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Last Answer : (3) Silver Explanation: Silver has the best thermal conductivity of 429 W/mK at RT (295K). It is followed by copper, gold and aluminium. Metals generally have very good electrical conductivity, that leads to high thermal conductivity.

The most malleable metal is - (1) platinum (2) silver (3) gold (4) iron

Description : The most malleable metal is - (1) platinum (2) silver (3) gold (4) iron

Last Answer : (3) gold Explanation: Gold is the most malleable of all metals; a single gram can be beaten into a sheet of 1 square meter, and an ounce into 300 square feet.

The best conductor of electricity among the following is - (1) copper (2) iron (3) aluminum (4) silver

Description : The best conductor of electricity among the following is - (1) copper (2) iron (3) aluminum (4) silver

Last Answer : (4) silver Explanation: Copper and Silver Are Most Common. Silver is the best conductor of electricity because it contains a higher number of movable atoms (free electrons).

The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Description : The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Last Answer : (4) Silver Explanation: Copper: 9% less conductive than silver; aluminium is 10% less conductive than copper; while steel is the least conductive among the given options. The most electrically conductive metal is silver.

Which of the metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Description : Which of the metals has the maximum thermal conductivity? (1) Iron (2) Aluminium (3) Silver (4) Copper

Last Answer : Silver

The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Description : The best conductor of electricity among the following is : (1) Copper (2) Iron (3) Aluminium (4) Silver

Last Answer : Silver

Silver is obtained from the lead & Zinc ares of Zawar mines in which city? -General Knowledge

Description : Silver is obtained from the lead & Zinc ares of Zawar mines in which city? -General Knowledge

Last Answer : The answer is 'Udaipur'

Silver is obtained from the lead & Zinc ares of Zawar mines in which city? -General Knowledge

Description : Silver is obtained from the lead & Zinc ares of Zawar mines in which city? -General Knowledge

Last Answer : answer:

Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting silver is an example for

Description : Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting silver is an example for

Last Answer : Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting ... Hydro metallurgy C. Pyrometallurgy D. Liquition

What is silver nitrate + zinc chloride?

Description : What is silver nitrate + zinc chloride?

Last Answer : I included phases in this equation, showing that all products and reactants in this reaction are aqueous, with the exception of silver chloride which forms a solid ...

Which of the following statements is correct? I. German silver is an alloy of silver, copper and zinc II. There is no zinc in brass III. Bronze is an alloy of copper and tin (a) I, II, and III (b) Only III (c) I and III (d) I and II

Description : Which of the following statements is correct? I. German silver is an alloy of silver, copper and zinc II. There is no zinc in brass III. Bronze is an alloy of copper and tin (a) I, II, and III (b) Only III (c) I and III (d) I and II

Last Answer : Ans:(b)

German Silver is an alloy of – (1) Copper, Silver and Zinc (2) Copper, Nickel and Zinc (3) Mid-brain (4) Fore-brain

Description : German Silver is an alloy of – (1) Copper, Silver and Zinc (2) Copper, Nickel and Zinc (3) Mid-brain (4) Fore-brain

Last Answer : (2) Copper, Nickel and Zinc Explanation: German Silver (also known as New Silver, Nickel Brass, etc) is a copper alloy with nickel and often zinc.

Brass is an alloy of - (1) Nickel and Copper (2) Copper and Silver (3) Nickel and Zinc (4) Zinc and Copper

Description : Brass is an alloy of - (1) Nickel and Copper (2) Copper and Silver (3) Nickel and Zinc (4) Zinc and Copper

Last Answer : (4) Zinc and Copper Explanation: Brass is an alloy of copper and zinc, in proportions which can be varied to achieve varying mechanical and electrical properties.

Brass contains – (1) Copper and Zinc (2) Copper and Tin (3) Copper and Silver (4) Copper and Nickel

Description : Brass contains – (1) Copper and Zinc (2) Copper and Tin (3) Copper and Silver (4) Copper and Nickel

Last Answer : (1) Copper and Zinc Explanation: Brass is an alloy made of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. By comparison, bronze is principally an alloy of copper and tin.

German silver used for making utensils is an alloy of – (1) Copper, silver, nickel (2) Copper, zinc, nickel (3) copper, zinc, aluminium (4) copper, nickel, aluminium

Description : German silver used for making utensils is an alloy of – (1) Copper, silver, nickel (2) Copper, zinc, nickel (3) copper, zinc, aluminium (4) copper, nickel, aluminium

Last Answer : (2) Copper, zinc, nickel Explanation: Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often ... to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong.

German silver is an alloy of - (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) silver, zinc and copper

Description : German silver is an alloy of - (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) silver, zinc and copper

Last Answer : (3) zinc, copper and nickel Explanation: German silver is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc.

A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be – (1) silver (2) copper (3) aluminium (4) zinc

Description : A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be – (1) silver (2) copper (3) aluminium (4) zinc

Last Answer : (2) copper Explanation: Copper forms a rich variety of compounds with oxidation states +1 and +2, which are often called cuprous and cupric, respectively. It does not react with water, but it ... contrast to the oxidation of iron by wet air, this oxide layer stops the further, bulk corrosion.

German silver is an alloy of – (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) zinc, silver and copper

Description : German silver is an alloy of – (1) copper, nickel and silver (2) silver, copper and aluminium (3) zinc, copper and nickel (4) zinc, silver and copper

Last Answer : (3) zinc, copper and nickel Explanation: Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often ... . Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated.

Which of the following is not present in German-silver? (1) Copper (2) Nickel (3) Silver (4) Zinc

Description : Which of the following is not present in German-silver? (1) Copper (2) Nickel (3) Silver (4) Zinc

Last Answer : (3) Silver Explanation: Nickel silver, also known as German silver, Argentan, new silver, nickel brass, albata, alpacca, or electrum, is a copper alloy with nickel and often zinc. The ... to its development by 19th-century German metalworkers in imitation of the Chinese alloy known as paktong.

German silver, an alloy, does not contain the metal – (1) Nickel (2) Zinc (3) Copper (4) Silver

Description : German silver, an alloy, does not contain the metal – (1) Nickel (2) Zinc (3) Copper (4) Silver

Last Answer : (4) Silver Explanation: Nickel silver is a copper alloy with nickel and oft6n. zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery ... under ASTM B 122) contain significant amounts of zinc, and are sometimes considered a subset of brass.

Silver is obtained from the lead & Zinc ares of Zawar mines in which city?

Description : Silver is obtained from the lead & Zinc ares of Zawar mines in which city?

Last Answer : Udaipur

Pick out the wrong statement. (A) Bronze is an alloy of copper & tin (B) Brass is an alloy of copper & zinc (C) The alloy named 'German silver' does not contain any silver (D) The ability of a material to fracture without appreciable deformation is called its ductility

Description : Pick out the wrong statement. (A) Bronze is an alloy of copper & tin (B) Brass is an alloy of copper & zinc (C) The alloy named 'German silver' does not contain any silver (D) The ability of a material to fracture without appreciable deformation is called its ductility

Last Answer : (D) The ability of a material to fracture without appreciable deformation is called its ductility

German silver used for decorative purposes contains maximum percentage of (A) Silver (B) Copper (C) Zinc (D) Nickel

Description : German silver used for decorative purposes contains maximum percentage of (A) Silver (B) Copper (C) Zinc (D) Nickel

Last Answer : (B) Copper

German silver in an alloy of (A) Copper, nickel and zinc (B) Copper, aluminium and silver (C) Silver, zinc and aluminium (D) Silver, nickel and zinc

Description : German silver in an alloy of (A) Copper, nickel and zinc (B) Copper, aluminium and silver (C) Silver, zinc and aluminium (D) Silver, nickel and zinc

Last Answer : (A) Copper, nickel and zinc

Softness of silver can be converted into hardness by alloying it with small quantity of (A) Copper & nickel (B) Zinc (C) Aluminium (D) Tin

Description : Softness of silver can be converted into hardness by alloying it with small quantity of (A) Copper & nickel (B) Zinc (C) Aluminium (D) Tin

Last Answer : (A) Copper & nickel

German silver is an alloy of copper, nickel and (A) Zinc (B) Silver (C) Tin (D) LeadGerman silver is an alloy of copper, nickel and(A) Zinc(B) Silver(C) Tin(D) Lead

Description : German silver is an alloy of copper, nickel and (A) Zinc (B) Silver (C) Tin (D) Lead

Last Answer : (A) Zinc

Why is Zinc and not Copper used for the recovery of Silver from the complex [Ag (CN)2 ] ?

Description : Why is Zinc and not Copper used for the recovery of Silver from the complex [Ag (CN)2 ] ? 

Last Answer : Ans. Zinc is stronger reducing agent and more electropositive than Copper. (E° = + 0.34V)