Heavy water is so called because it contains - (1) Heavy isotope of hydrogen (2) Heavy isotope of oxygen (3) Mole number of hydrogen atoms (4) Mole number of oxygen atoms

Heavy water is so called because it contains - (1) Heavy isotope of hydrogen (2) Heavy isotope of oxygen (3) Mole number of hydrogen atoms (4) Mole number of oxygen atoms
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(1) Heavy isotope of hydrogen Explanation: Heavy water, formally called deuterium oxide, is a form of "water that contains a larger than normal amount of the hydrogen isotope deuterium, (also known as "heavy hydrogen") rather than the common hydrogen-1 isotope that makes up most of the hydrogen in normal water.
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Heavy water is so called because it contains (1) Heavy isotope of hydrogen (2) Heavy isotope of oxygen (3) Mole number of hydrogen atoms (4) Mole number of oxygen atoms

Description : Heavy water is so called because it contains (1) Heavy isotope of hydrogen (2) Heavy isotope of oxygen (3) Mole number of hydrogen atoms (4) Mole number of oxygen atoms

Last Answer : Heavy isotope of hydrogen

Heavy water' is termed as 'heavy' because it is (A) Denser than water (B) An oxide of deuterium (C) A heavy liquid (D) An oxide of heavier isotope of oxygen

Description : Heavy water' is termed as 'heavy' because it is (A) Denser than water (B) An oxide of deuterium (C) A heavy liquid (D) An oxide of heavier isotope of oxygen

Last Answer : (B) An oxide of deuterium

The radioactive isotope of hydrogen is called--------- and its nucleus contains --------proton and --- --neutron.

Description : The radioactive isotope of hydrogen is called--------- and its nucleus contains --------proton and --- --neutron.

Last Answer : Ans: Tritium, one and two

Heavy water is used as a coolant in nuclear reactors. Heavy water is (1) water rich in minerals (2) ozonised water (3) water containing minerals of heavy metal (4) water containing heavy isotope of hydrogen

Description : Heavy water is used as a coolant in nuclear reactors. Heavy water is (1) water rich in minerals (2) ozonised water (3) water containing minerals of heavy metal (4) water containing heavy isotope of hydrogen 

Last Answer : water containing heavy isotope of hydrogen

Water contains (A) One hydrogen atom and one oxygen atom (B) Two hydrogen atoms and one oxygen atom (C) One hydrogen atom and two oxygen atoms D) Three hydrogen atoms and two oxygen atoms

Description : Water contains (A) One hydrogen atom and one oxygen atom (B) Two hydrogen atoms and one oxygen atom (C) One hydrogen atom and two oxygen atoms D) Three hydrogen atoms and two oxygen atoms

Last Answer : Answer: Option B

What is the number of hydrogen atoms present in 0.791 mole of ammonia?

Description : What is the number of hydrogen atoms present in 0.791 mole of ammonia?

Last Answer : The number of hydrogen atoms is 14,290540253661.10e23.

What is the number of hydrogen atoms present in 0.791 mole of ammonia?

Description : What is the number of hydrogen atoms present in 0.791 mole of ammonia?

Last Answer : The number of hydrogen atoms is 14,290540253661.10e23.

Is the amount of a substance that contains Avogadro’s number of atoms/molecules.  a. mass  b. matter  c. gram-mole  d. volume

Description : Is the amount of a substance that contains Avogadro’s number of atoms/molecules.  a. mass  b. matter  c. gram-mole  d. volume

Last Answer : gram-mole

Calculate the number of oxygen atoms in 1 mole of O2. -Chemistry 9th

Description : Calculate the number of oxygen atoms in 1 mole of O2. -Chemistry 9th

Last Answer : 1 molecule of O2 = 2 oxygen atoms So, 1 mole of O2 = 2 mole oxygen atoms = 2 × 6.022 × 1023 = 12.044 ×1023 oxygen atoms.

The isotope atoms differ in - (1) number of neutrons (2) atomic number (3) number of electrons (4) atomic weight

Description : The isotope atoms differ in - (1) number of neutrons (2) atomic number (3) number of electrons (4) atomic weight

Last Answer : (1) number of neutrons Explanation: Important to note that isotope atoms have same atomic number.

10 mole of carbon contains A. 6.02 × 1024 atoms B. 6.03 × 1023 atoms C. 6.02 × 1023 atoms D. 6.04 × 1024 atoms

Description : 10 mole of carbon contains A. 6.02 × 1024 atoms B. 6.03 × 1023 atoms C. 6.02 × 1023 atoms D. 6.04 × 1024 atoms

Last Answer : 6.02 × 1024 atoms

The high boiling points of alcohols, as compared to the corresponding alkanes, are due to (a) Hydrogen bonding (b) Heavy oxygen atom (c) Water solubility(d) None of these

Description : The high boiling points of alcohols, as compared to the corresponding alkanes, are due to (a) Hydrogen bonding (b) Heavy oxygen atom (c) Water solubility (d) None of these

Last Answer : Hydrogen bonding

which isotope of hydrogen is used as a tracer in organic compound.

Description : which isotope of hydrogen is used as a tracer in organic compound.

Last Answer : Ans: The Hydrogen has three isotopes viz H.D and T. Due to difference in masses, the rate constant of these isotopes with the same substrate are different. In other words Both D and T ... also least abundant hydrogen isotope, therefore D is used as tracer to study the mechanism of organic reaction.

which is the most stable isotope of Hydrogen?

Description : which is the most stable isotope of Hydrogen?

Last Answer : Ans. Protium

In an alkyl halide substitution of hydrogen by deuterium results in slow formation of ion pair. This is known as? a. Ortho effect b. Mesomeric effect c. Secondary kinetic isotope effect d. Primary kinetic isotope effect

Description : In an alkyl halide substitution of hydrogen by deuterium results in slow formation of ion pair. This is known as? a. Ortho effect b. Mesomeric effect c. Secondary kinetic isotope effect d. Primary kinetic isotope effect

Last Answer : c. Secondary kinetic isotope effect

A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole?  a. 125.02  b. 130.08  c. 135.05  d. 120.04

Description : A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole?  a. 125.02  b. 130.08  c. 135.05  d. 120.04

Last Answer : 130.08 {(10atm)(10)(32)/(0.0821) (300K)}

Heavy metals got their name because compared to other atoms they have - (1) Higher densities (2) Higher atomic masses (3) Higher atomic numbers (4) Higher atomic radii

Description : Heavy metals got their name because compared to other atoms they have - (1) Higher densities (2) Higher atomic masses (3) Higher atomic numbers (4) Higher atomic radii

Last Answer : (2) Higher atomic masses Explanation: Arsenic, beryllium, cadmium, chromium, lead, manganese, mercury, nickel, and selenium are some of the metals called 'heavy' because of their high relative atomic ... and can cause damage or death in animals, humans, and plants even at very low concentrations.

Heavy metals got their name because compared to other atoms they have (1) Higher densities (2) Higher atomic masses (3) Higher atomic numbers (4) Higher atomic radii

Description : Heavy metals got their name because compared to other atoms they have (1) Higher densities (2) Higher atomic masses (3) Higher atomic numbers (4) Higher atomic radii

Last Answer : Higher atomic masses

What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?

Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?

Last Answer : Half-life

In the water molecule are electrons are equally shared by hydrogen atoms and oxygen atoms?

Description : In the water molecule are electrons are equally shared by hydrogen atoms and oxygen atoms?

Last Answer : What is the answer ?

Two hydrogen-like atoms `A` and `B` are of different masses and each atom contains equal numbers of protons and neutrons. The difference in the energi

Description : Two hydrogen-like atoms `A` and `B` are of different masses and each atom contains equal numbers of protons and neutrons. The difference in the energi

Last Answer : Two hydrogen-like atoms `A` and `B` are of different masses and each atom contains equal numbers of ... A` imparts. Identify the atom `A and B`.

Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Description : Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Last Answer : there is delocalization of electrons

Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Description : Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Last Answer : there is delocalization of electrons

The complete combustion of one mole of hydrogen produces: w) 1/2 mole H2O x) 1/2 mole H2O + 1/2 mole O3 y) 1 mole water z) 1 mole hydroxide ions

Description : The complete combustion of one mole of hydrogen produces: w) 1/2 mole H2O x) 1/2 mole H2O + 1/2 mole O3 y) 1 mole water z) 1 mole hydroxide ions

Last Answer : ANSWER: Y -- 1 MOLE WATER

If oxygen which has an electronegativity of 3.5 bonds with hydrogen which has an electronegativity of 2.1 the bond between the two atoms will be classified as a polar what bond?

Description : If oxygen which has an electronegativity of 3.5 bonds with hydrogen which has an electronegativity of 2.1 the bond between the two atoms will be classified as a polar what bond?

Last Answer : Need answer

The isotope deuterium of hydrogen has : -Science

Description : The isotope deuterium of hydrogen has : -Science

Last Answer : Hydrogen has no neutron, deuterium has one, and tritium has two neutrons. The isotopes of hydrogen have, respectively, mass numbers of one, two, and three.

The unstable isotope of hydrogen is …..

Description : The unstable isotope of hydrogen is …..

Last Answer : The unstable isotope of hydrogen is ….. a. H-1 b. H-2 c. H-3 d. H-4

How many neutrons does a isotope of hydrogen have?

Description : How many neutrons does a isotope of hydrogen have?

Last Answer : Need answer

Which one is the radioactive isotope of hydrogen? (A) Deuterium (B) Ortho-hydrogen (C) Tritium (D) None of these

Description : Which one is the radioactive isotope of hydrogen? (A) Deuterium (B) Ortho-hydrogen (C) Tritium (D) None of these

Last Answer : (C) Tritium

Find the number of atoms in 0.5 mole of C atom. -Chemistry 9th

Description : Find the number of atoms in 0.5 mole of C atom. -Chemistry 9th

Last Answer : 0.5 mole of C=6.022×10*23 no. of atoms = 6.022×10*23/2 =3.011×10*23 hope this helps u

What is the total number of nitrogen atoms in 0.25 mole of NO2 gas?

Description : What is the total number of nitrogen atoms in 0.25 mole of NO2 gas?

Last Answer : 0,25 mole of NO2 gas contain 1,505 535 214 25.10e23 nitrogen atoms.

What is the total number of atoms contained in a 1.00 mole sample of helium?

Description : What is the total number of atoms contained in a 1.00 mole sample of helium?

Last Answer : The total number of atoms contained in a 1,00 mole sample ofhelium is 6,022 140 857.10e23.

What is the total number of atoms contained in a 1.00 mole sample of helium?

Description : What is the total number of atoms contained in a 1.00 mole sample of helium?

Last Answer : The total number of atoms contained in a 1,00 mole sample ofhelium is 6,022 140 857.10e23.

What is the total number of nitrogen atoms in 0.25 mole of NO2 gas?

Description : What is the total number of nitrogen atoms in 0.25 mole of NO2 gas?

Last Answer : 0,25 mole of NO2 gas contain 1,505 535 214 25.10e23 nitrogen atoms.

A molar solution is one that contains one mole of a solute in [IIT 1986] (A) 1000 g of the solvent (B) One litre of the solvent (C) One litre of the solution (D) 22.4 litres of the solution

Description : A molar solution is one that contains one mole of a solute in [IIT 1986] (A) 1000 g of the solvent (B) One litre of the solvent (C) One litre of the solution (D) 22.4 litres of the solution

Last Answer : (C) One litre of the solution

What is the mass of 1/2 mole oxygen atom ?

Description : What is the mass of 1/2 mole oxygen atom ?

Last Answer : Mole Oxygen Atomic Mass = 18 grams So , 1/2 Mole Oxygen Atomic Mass = 6 grams

What is the mass in grams of one mole of helium atoms?

Description : What is the mass in grams of one mole of helium atoms?

Last Answer : 6

What is the mass in grams of one-mole of potassium atoms?

Description : What is the mass in grams of one-mole of potassium atoms?

Last Answer : 6

What data does a sample of pure water irrespective of its source contains 11.1 hydrogen and 88.9 oxygen support?

Description : What data does a sample of pure water irrespective of its source contains 11.1 hydrogen and 88.9 oxygen support?

Last Answer : It might have supported Proust's law or the law of definitecomposition, or law of constant composition. But unfortunately thedata used are not accurate. The correct proportions, based onrelative atomic masses of hydrogen and oxygen being 1.008 and15.999 give the results as 11.2% and 88.8%.

The nuclei of heavy atoms generally contain: w) more electrons than neutrons x) more protons than electrons y) more neutrons than electrons z) more orbitals than electrons

Description : The nuclei of heavy atoms generally contain: w) more electrons than neutrons x) more protons than electrons y) more neutrons than electrons z) more orbitals than electrons

Last Answer : ANSWER: Y -- MORE NEUTRONS THAN ELECTRONS

Hydrogen is not found in atmosphere because – (1) it is highly inflammable (2) it is the lightest gas (3) it is absorbed by plants (4) it immediately combines with oxygen to form water

Description : Hydrogen is not found in atmosphere because – (1) it is highly inflammable (2) it is the lightest gas (3) it is absorbed by plants (4) it immediately combines with oxygen to form water

Last Answer : (2) it is the lightest gas Explanation: Hydrogen is a chemical element with symbol H and atomic number 1. With an average atomic weight of 1.00794 u (1.007825 u for hydrogen-1), hydrogen ... hydrogen in its plasma state. Air is the name given to the atmosphere used in breathing and photosynthesis.

Hydrogen is not found in atmosphere because (1) it is highly inflammable (2) it is the lightest gas (3) it is absorbed by plants (4) it immediately combines with oxygen to form water

Description : Hydrogen is not found in atmosphere because (1) it is highly inflammable (2) it is the lightest gas (3) it is absorbed by plants (4) it immediately combines with oxygen to form water

Last Answer :  it is the lightest gas

If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Description : If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Last Answer : ANS: A

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Description : If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Last Answer : ANS: B

If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Description : If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Last Answer : ANS: C

When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is - (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them

Description : When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is - (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them

Last Answer : (3) Carbon dioxide Explanation: When baking soda and lemon juice are added together, the reaction of the two is an acid-based reaction because it involves an acid (citric acid in the lemon juice) ... , more commonly known as baking soda). Carbon dioxide, a gas, is produced by the reaction.

When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them

Description : When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them 

Last Answer : Carbon dioxide

What is the number of hydrogen atoms in an alken with three carbon atoms ?

Description : What is the number of hydrogen atoms in an alken with three carbon atoms ?

Last Answer : Answer : The most common sign of an alkene is CnH2n + 2, where ' n' is the number of carbon atoms. Therefore the number of H– atoms in an alken with 3 carbon atoms = ( 2.3 + 2) = 8 .

In ammonia NH3 the hydrogen atoms orient themselves as far away as possible from each other because this arrangement .?

Description : In ammonia NH3 the hydrogen atoms orient themselves as far away as possible from each other because this arrangement .?

Last Answer : APEXminimizes the repulsion of electron groups

What is same in one mole of water and hydrogen?

Description : What is same in one mole of water and hydrogen?

Last Answer : Need answer