Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium
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Aluminium
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Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Description : Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Last Answer : (4) Aluminium Explanation: Aluminium is an acceptor atom, an impurity atom in a semiconductor, which can accept or take up one or more electrons from the crystal and become negatively charged. In semiconductor physics. It is a dopant atom that when added to a semiconductor can form a ptype region.

Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Description : Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Last Answer : (4) Aluminium Explanation: Aluminium is an acceptor atom, an impurity atom in a semiconductor, which can accept or take up one or more electrons from the crystal and become negatively charged.

Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or arsenic oxide (C) Ordinary glass is represented chemically by Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide

Description : Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by ... Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide

Last Answer : (D) Red color is imparted to glass by addition of arsenic oxide

Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing. (A) Oxygen (B) Arsenic (C) Antimony (D) Bismuth

Description : Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing. (A) Oxygen (B) Arsenic (C) Antimony (D) Bismuth

Last Answer : (D) Bismuth

Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. (A) Bismuth (B) Arsenic (C) Antimony (D) Both (B) and (C)

Description : Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. (A) Bismuth (B) Arsenic (C) Antimony (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

__________ is a donor impurity for semi-conductors. (A) Boron (B) Antimony (C) Gallium (D) None of these

Description : __________ is a donor impurity for semi-conductors. (A) Boron (B) Antimony (C) Gallium (D) None of these

Last Answer : (B) Antimony

What is the only nonmetal element that is a liquid room temperature? w) phosphorus x) bromine y) iodine z) arsenic

Description : What is the only nonmetal element that is a liquid room temperature? w) phosphorus x) bromine y) iodine z) arsenic

Last Answer : ANSWER: X -- BROMINE

Which of the following statement is incorrect ? a)Oxide of aluminium `(Al_(2)O_(3))` and arsenic `(As_(2)O_(3))` are amphoteric. b)Oxide of chlorine `

Description : Which of the following statement is incorrect ? a)Oxide of aluminium `(Al_(2)O_(3))` and arsenic `(As_(2)O_(3))` are amphoteric. b)Oxide of chlorine `

Last Answer : Which of the following statement is incorrect ? a)Oxide of aluminium `(Al_(2)O_(3))` and ... sulphides D. Malachite and azurite are ores of copper

Locomotive boiler tubes are made of __________ alloys. (A) Arsenic copper (B) Magnesium (C) Aluminium (D) Nickel

Description : Locomotive boiler tubes are made of __________ alloys. (A) Arsenic copper (B) Magnesium (C) Aluminium (D) Nickel

Last Answer : (A) Arsenic copper

There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant? (A) Mercury (B) Arsenic (C) Aluminium (D) Lead

Description : There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant? (A) Mercury (B) Arsenic (C) Aluminium (D) Lead

Last Answer : (C) Aluminium

The oxidation number of arsenic atom in `H_(3)AsO_(4)` is :-

Description : The oxidation number of arsenic atom in `H_(3)AsO_(4)` is :-

Last Answer : The oxidation number of arsenic atom in `H_(3)AsO_(4)` is :- A. `-1` B. `-3` C. `+3` D. `+5`

Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium

Description : Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium

Last Answer : (3) Chlorine Explanation: Chlorine is a chemical element with symbol Cl and atomic number 17. Phosphorus is a chemical element with symbol P and atomic number 15.

Soil of Western Rajasthan have a high content or (a) Aluminium (b) Calcium (c) Nitrogen (d) Phosphorus

Description : Soil of Western Rajasthan have a high content or (a) Aluminium (b) Calcium (c) Nitrogen (d) Phosphorus

Last Answer : Ans: (b)

Phosphorus is generally fixed in acid soils in the form of— (A) Calcium Phosphate (B) Zn Phosphate (C) Aluminium Phosphate (D) None of these

Description : Phosphorus is generally fixed in acid soils in the form of— (A) Calcium Phosphate (B) Zn Phosphate (C) Aluminium Phosphate (D) None of these

Last Answer : (C) Aluminium Phosphate

Soils of Western Rajasthan have a high content of a) Aluminium b) Calcium c) Nitrogen d) Phosphorus

Description : Soils of Western Rajasthan have a high content of a) Aluminium b) Calcium c) Nitrogen d) Phosphorus

Last Answer : b) Calcium

The color of Red soil is red due to the presence of the which of the following oxides? a. Ferric b. Aluminium c. Phosphorus d. Calcium

Description : The color of Red soil is red due to the presence of the which of the following oxides? a. Ferric b. Aluminium c. Phosphorus d. Calcium

Last Answer : a. Ferric

The color of Red soil is red due to the presence of the which of the following oxides? a. Ferric b. Aluminium c. Phosphorus d. Calcium

Description : The color of Red soil is red due to the presence of the which of the following oxides? a. Ferric b. Aluminium c. Phosphorus d. Calcium

Last Answer : a. Ferric

Liquid metal is - (1) Mercury (2) Sodium (3) Antimony (4) None

Description : Liquid metal is - (1) Mercury (2) Sodium (3) Antimony (4) None

Last Answer : (1) Mercury Explanation: Liquid metal consists of galliumcontaining alloys with very low melting points which are liquid at room temperature. The standard metal formerly is mercury.

Solder metal is an alloy of – (1) lead and tin (2) lead and antimony (3) copper and zinc (4) copper and tin

Description : Solder metal is an alloy of – (1) lead and tin (2) lead and antimony (3) copper and zinc (4) copper and tin

Last Answer : (1) lead and tin Explanation: A solder is a fusible metal alloy of tin and lead with a melting point or melting range of 90 to 450°C, used in a process called soldering where it is melted to jain metallic surfaces. It is especially useful in electronics and plumbing.

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.

Type metal used in printing press is an alloy of - (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc

Description : Type metal used in printing press is an alloy of - (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc

Last Answer : (2) lead and antimony Explanation: Lead and antimony are used to make type metals alloy. These type metals are used to make the character produced durable and tough.

Brass is an alloy of - (1) Lead and tin (2) Zine and copper (3) Antimony, tin and lead (4) Zinc, tin and copper

Description : Brass is an alloy of - (1) Lead and tin (2) Zine and copper (3) Antimony, tin and lead (4) Zinc, tin and copper

Last Answer : (2) Zine and copper Explanation: Brass is an alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. By comparison ... , including alloys with arsenic, phosphorus, aluminium, manganese, and silicon, are commonly termed "brome".

Type metal used in printing press is an alloy of – (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc

Description : Type metal used in printing press is an alloy of – (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc

Last Answer : (2) lead and antimony Explanation: In printing, type metal (sometimes called hot metal) refers to the metal alloys used in traditional type founding and hot metal typesetting. Lead is the main ... make castings with sharp details because molten lead shrinks and sags when it cools to a solid.

The common alloy, babbit metal, which is composed of tin, antimony, and copper, is best known for its use in: w) magnets x) bearings y) dental fillings z) drinking vessels

Description : The common alloy, babbit metal, which is composed of tin, antimony, and copper, is best known for its use in: w) magnets x) bearings y) dental fillings z) drinking vessels

Last Answer : ANSWER: X -- BEARINGS

The chemical symbol for antimony is: w) An x) Sn y) Sb z) At

Description : The chemical symbol for antimony is: w) An x) Sn y) Sb z) At

Last Answer : ANSWER: Y -- Sb

Which of the following reactions involve NEITHER oxidation nor reduction? w) burning antimony in chlorine x) decomposition of potassium chlorate y) reaction of sodium with water z) reaction of potassium hydroxide with nitric acid

Description : Which of the following reactions involve NEITHER oxidation nor reduction? w) burning antimony in chlorine x) decomposition of potassium chlorate y) reaction of sodium with water z) reaction of potassium hydroxide with nitric acid

Last Answer : ANSWER: Z -- REACTION OF POTASSIUM HYDROXIDE WITH NITRIC ACID  

Solder metal is an alloy of (1) lead and tin (2) lead and antimony (3) copper and zinc (4) copper and tin

Description : Solder metal is an alloy of (1) lead and tin (2) lead and antimony (3) copper and zinc (4) copper and tin

Last Answer : lead and tin

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

Brass is an alloy of (1) Lead and tin (2) Zinc and copper (3) Antimony, tin and lead (4) Zinc, tin and copper

Description : Brass is an alloy of (1) Lead and tin (2) Zinc and copper (3) Antimony, tin and lead (4) Zinc, tin and copper

Last Answer : Zinc and copper

Type metal used in printing press is an alloy of (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc

Description : Type metal used in printing press is an alloy of (1) lead and copper (2) lead and antimony (3) lead and bismuth (4) lead and zinc

Last Answer :  lead and antimony

The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is

Description : The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is

Last Answer : The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is A. zero B. two C. one D. three

The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is

Description : The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is

Last Answer : The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is A. zero B. two C. one D. three

How many unpaired electrons are present in each atom of phosphorus?

Description : How many unpaired electrons are present in each atom of phosphorus?

Last Answer : Three unpaired electrons are present in each atom ofphosphorus.

What is the acceptable level of arsenic in water ?

Description : What is the acceptable level of arsenic in water ?

Last Answer : Acceptable levels of arsenic in water : 0 . 01 Mr. _ Gr . Per Litter.

Surface water is a better source of drinking water because it is poor in - (1) Dust (2) Bacteria (3) Arsenic (4) Algae

Description : Surface water is a better source of drinking water because it is poor in - (1) Dust (2) Bacteria (3) Arsenic (4) Algae

Last Answer : (3) Arsenic Explanation: Surface water is a better source of drinking water because it is poor in arsenic.

Which of the following is used for removing air bubbles from glass during its manufacture? (1) Fledspar (2) Arsenic oxide (3) Potassium Carbonate (4) Soda Ash

Description : Which of the following is used for removing air bubbles from glass during its manufacture? (1) Fledspar (2) Arsenic oxide (3) Potassium Carbonate (4) Soda Ash

Last Answer : (2) Arsenic oxide

When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : (4) Extrinsic semiconductor Explanation: When a peritavalent (donor) impurity, like arsenic, is added to germanium, it will form covalent bonds with thegermanium atoms, leaving 1 electron relatively ... this manner - either with Nor P-type impurities - are referred to as EXTRINSIC semiconductors.

If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by – (1) Mercury (2) Lead (3) Iron (4) Arsenic

Description : If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by – (1) Mercury (2) Lead (3) Iron (4) Arsenic

Last Answer : (2) Lead Explanation: Lead is used in building construction, lead-acid batteries, bullets and shot, weights, as part of solders, pewters, fusible alloys, and as a radiation shield. Lead has the ... Its four stable isotopes have 82 protons, a magic number in the nuclear shell model of atomic nuclei.

An example of semiconductor is - (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Description : An example of semiconductor is - (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Last Answer : (2) Germanium Explanation: Purified germanium is a semiconductor, with appearance most similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature. Unlike silicon, it is too reactive to be found naturally on Earth in the free (native) state.

If we add equimolar amounts of ferric hydroxide sol and arsenic sulphide sol, what will happen ?

Description : If we add equimolar amounts of ferric hydroxide sol and arsenic sulphide sol, what will happen ?

Last Answer : Ans. Both the sols will get coagulated. 

Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below. (A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium (1) B, D and E (2) A, B, C, D and E (3) A, C and E (4) A and C

Description : Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below. (A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium (1) B, D and E (2) A, B, C, D and E (3) A, C and E (4) A and C

Last Answer : A, C and E 

When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : Extrinsic semiconductor

Surface water is a better source of drinking water because it is poor in (1) Dust (2) Bacteria (3) Arsenic (4) Algae

Description : Surface water is a better source of drinking water because it is poor in (1) Dust (2) Bacteria (3) Arsenic (4) Algae

Last Answer : Arsenic

An example of semiconductor is (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Description : An example of semiconductor is (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Last Answer : Germanium

If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by (1) Mercury (2) Lead (3) Iron (4) Arsenic

Description : If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by (1) Mercury (2) Lead (3) Iron (4) Arsenic

Last Answer : Lead

What are the signals of Antimony ?

Description : What are the signals of Antimony ?

Last Answer : Sb Antimony signal

What is the CAS number of antimony?

Description : What is the CAS number of antimony?

Last Answer : 7440-36-0 is the CAS number of antimony.

Are tin and antimony in the same group?

Description : Are tin and antimony in the same group?

Last Answer : No. They are in groups 14 and 15 respectively. They are both inthe same period.

What is the chemical formula for antimony (III) phosphate?

Description : What is the chemical formula for antimony (III) phosphate?

Last Answer : Need answer

Are tin and antimony in the same group?

Description : Are tin and antimony in the same group?

Last Answer : No. They are in groups 14 and 15 respectively. They are both inthe same period.