The substances which are capable of ab- sorbing combined water or elements of water from molecules of compounds are called?

The substances which are capable of ab-
sorbing combined water or elements of water
from molecules of compounds are called?
by

1 Answer

Answer :

Dehydrating agent
by

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Last Answer : Answer: A

Is platinum found in nature or is it only found combined with other elements in chemical compounds?

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Last Answer : Platinum is found in the nature in elemental form.

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Description : Two or more substances (elements or compounds or both) that do not combine chemically during the mixing?

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Description : The substances which are capable of re- moving water vapour from, other supstances are called?

Last Answer : Drying agents

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Description : CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone. (A) 10 2 (B) 10 5 (C) 10 9 (D) 10 15

Last Answer : (B) 10 5

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Description : Biological Oxygen Demand (BOD) is a measure of: a. Industrial wastes poured into water bodies b. Extent to which water is polluted with organic compounds c. Amount of carbon monoxide inseparably combined with haemoglobin d. Amount of oxygen needed by green plants during night

Last Answer : Ans: A

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Description : What is the name of the compounds formed when calcium carbon and oxygen are combined?

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Last Answer : in some tissues permit the transport of glucose at a greater rate in the presence of insulin

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Last Answer : ANSWER: C -- NUCLEIC ACIDS 

Using X-ray crystallography, this woman scientist determined the structures of large biochemical molecules, including penicillin in 1949 and vitamin B12 in 1956. In 1969 she determined the three dimensional structure of insulin. In 1964 she was awarded the Nobel Prize in chemistry "for her determination by X-ray techniques of the structures of important biochemical substances." Name this woman scientist.

Description : Using X-ray crystallography, this woman scientist determined the structures of large biochemical molecules, including penicillin in 1949 and vitamin B12 in 1956. In 1969 she determined the three ... X-ray techniques of the structures of important biochemical substances." Name this woman scientist.

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Last Answer : ANSWER: ALUMINUM

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Description : Most covalent compounds (a) Behave like electrolytes in the molten state (b) Have high melting and boiling points (c) Are hard substances because of strong covalent bonds (d) Are more soluble in non-polar solvents than in polar solvents

Last Answer : Ans:(d)

Are organic compounds electrolytic or covalent substances ?

Description : Are organic compounds electrolytic or covalent substances ?

Last Answer : Organic compounds are covalent substances.

What elements will not form an acid when combined with hydrogen?

Description : What elements will not form an acid when combined with hydrogen?

Last Answer : Only halogens form a binary acid with hydrogen.

What Progressive rock combined the elements of jazz music with?

Description : What Progressive rock combined the elements of jazz music with?

Last Answer : Need answer

When elements that are never found free in nature but are always found combined in a compound are the?

Description : When elements that are never found free in nature but are always found combined in a compound are the?

Last Answer : These elements are very reactive.

(2) it is lighter than air Explanation: Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined. A well-known but minor use is as a lifting gas in balloons and airships

Description : (2) it is lighter than air Explanation: Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass ... elements combined. A well-known but minor use is as a lifting gas in balloons and airships

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Description : A type of integration testing in which software elements, hardware elements, or both are combined all at once into a component or an overall system, rather than in stages. A. System Testing B. Big-Bang Testing C. Integration Testing D. Unit Testing

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A type of integration testing in which software elements, hardware elements, or both are combined all at once into a component or an overall system, rather than in stages. A. System Testing B. Big-Bang Testing C. Integration Testing D. Unit Testing

Description : A type of integration testing in which software elements, hardware elements, or both are combined all at once into a component or an overall system, rather than in stages. A. System Testing B. Big-Bang Testing C. Integration Testing D. Unit Testing

Last Answer : B. Check the technical accuracy of the document

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Last Answer : B. Big-Bang Testing

Three elements having conductance G1 , G2 and G3 are connected in parallel. Their combined conductance will be

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The correct sequence for the manufacture of molecules/organic compounds on the primitive earth is (a) NH3, nucleic acid, protein and carbohydrate (b) protein, carbohydrate, water and nucleic acid (c) NH3, protein, carbohydrate and nucleic acid (d) NH3, water, nucleic acid and protein.

Description : The correct sequence for the manufacture of molecules/organic compounds on the primitive earth is (a) NH3, nucleic acid, protein and carbohydrate (b) protein, carbohydrate, water and nucleic acid (c) NH3, protein, carbohydrate and nucleic acid (d) NH3, water, nucleic acid and protein.

Last Answer : (d) NH3, water, nucleic acid and protein.

A family of organic compounds whose molecules will add water under an acid catalysis and change into alcohols are the: w) alkenes x) alkanes y) aromatic hydrocarbons z) cycloalkanes

Description : A family of organic compounds whose molecules will add water under an acid catalysis and change into alcohols are the: w) alkenes x) alkanes y) aromatic hydrocarbons z) cycloalkanes

Last Answer : ANSWER: W -- ALKENES

Answer: Molecules and compounds.

Description : Answer: Molecules and compounds.

Last Answer : Which Austrian physicist developed the philosophy that all knowledge is simply sensation?

Which of the following compounds has the least tendency to form hydrogen bonds between molecules ?

Description : Which of the following compounds has the least tendency to form hydrogen bonds between molecules ?

Last Answer : Which of the following compounds has the least tendency to form hydrogen bonds between molecules ? A. `NH_(3)` B. `H_(2)NOH` C. `HF` D. `CH_(3)F`

Do polar compounds have stronger or weaker attractions between molecules?

Description : Do polar compounds have stronger or weaker attractions between molecules?

Last Answer : Polar compounds have stronger attractions between molecules.

Do polar compounds have stronger or weaker attractions between molecules?

Description : Do polar compounds have stronger or weaker attractions between molecules?

Last Answer : Polar compounds have stronger attractions between molecules.

Which of the following is false? (1) Most carbon compounds are poor conductors of electricity. (2) The force of attraction between carbon molecules is not very strong. (3) The atomic number of carbon is 6. (4) The earth’s crust has about 2% carbon in the form of minerals.

Description : Which of the following is false? (1) Most carbon compounds are poor conductors of electricity. (2) The force of attraction between carbon molecules is not very strong. (3) The atomic number of carbon is 6. (4) The earth’s crust has about 2% carbon in the form of minerals.

Last Answer : (4) The earth’s crust has about 2% carbon in the form of minerals.

Which of the following compounds have planar molecules?(a) 1,3-Butadiene (b) Dimethyl ether (c) 1-Butene (d) Allene

Description : Which of the following compounds have planar molecules? (a) 1,3-Butadiene (b) Dimethyl ether (c) 1-Butene (d) Allene

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Which of the following is a true statement? (a) All chiral molecules possess a plane of symmetry. (b) All achiral molecules are meso. (c) All molecules which possess a single asymmetric center of the S configuration are levorotatory. (d) A mixture of achiral compounds will be optically inactive

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Last Answer : A mixture of achiral compounds will be optically inactive

Which of the following compounds have planar molecules? (a) ethyl alcohol (b) formaldehyde (c) diethyl ether (d) 1,3-butadiene

Description : Which of the following compounds have planar molecules? (a) ethyl alcohol (b) formaldehyde (c) diethyl ether (d) 1,3-butadiene

Last Answer : 1,3-butadiene formaldehyde

Pick out the wrong statement. (A) Molecules with symmetrical arrangements (e.g. CH4 or CCl4) are non polar (B) Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do not ionise (C) Most of the hydrocarbons are non-polar (D) None of these

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Last Answer : (D) None of these

Ketones are organic compounds. Name the functional group that all ketone molecules contain.

Description : Ketones are organic compounds. Name the functional group that all ketone molecules contain.

Last Answer : ANSWER: CARBONYL GROUP pr C DOUBLE BOND O

Substances containing all the four elements: carbon, hydrogen nitrogen and oxygen are 1. Morphine 2. Nucleic acids 3. Starch 4. Quinine Select the correct answer by using the code below, (a) 2, 3 and 4 only (b) 1, 2 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

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Are all substances elements but all elements are not substances?

Description : Are all substances elements but all elements are not substances?

Last Answer : Need answer

Are the basics substances that make up matter elements?

Description : Are the basics substances that make up matter elements?

Last Answer : Yes - or atoms.

Which one of the following best defines the word “allotropes”? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between those of metals and nonmetals D Atoms of a given atomic number that have a specific number of neutrons E The different phases (solid, liquid or gas) of a substance

Description : Which one of the following best defines the word allotropes ? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between ... a specific number of neutrons E The different phases (solid, liquid or gas) of a substance

Last Answer : A Different structural forms of an element 

The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction?(a) Magnesium and Molybdenum (b) Magnesium and Chlorine (c) Manganese and Chlorine (d) Manganese and Potassium

Description : The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction? (a) Magnesium and Molybdenum (b) Magnesium and Chlorine (c) Manganese and Chlorine (d) Manganese and Potassium

Last Answer : (c) Manganese and Chlorine

In FEA, the sub domains are called as . a.particles b.molecules c.elements d.none

Description : In FEA, the sub domains are called as . a.particles b.molecules c.elements d.none

Last Answer : c.elements

Nuclear radiation is emitted by those elements whose: A. molecules are stable B. molecules are unstable C. nuclei are stable D. nuclei are unstable (Answer)

Description : Nuclear radiation is emitted by those elements whose: A. molecules are stable B. molecules are unstable C. nuclei are stable D. nuclei are unstable (Answer)

Last Answer : D. nuclei are unstable (Answer)

Identify the wrong statement in context of heartwood. (a) It is highly durable. (b) It conducts water and minerals efficiently. (c) It comprises dead elements with highly lignified walls. (d) Organic compounds are deposited in it.

Description : Identify the wrong statement in context of heartwood. (a) It is highly durable. (b) It conducts water and minerals efficiently. (c) It comprises dead elements with highly lignified walls. (d) Organic compounds are deposited in it.

Last Answer : (b) It conducts water and minerals efficiently

Identify the wrong statement in context of heartwood: (1) It is highly durable (2) It conducts water and minerals efficiently (3) It comprises dead elements with highly lignified walls (4) Organic compounds are deposited in it

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Last Answer : 2) It conducts water and minerals efficiently

The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on

Description : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on

Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid- ... . `H_(2)O` D. `CO_(2)`