Description : Which element under normal circumstances does not combine chemically with other elements to form compounds?
Last Answer : Examples are helium, neon, argon.
Description : The substances which are capable of ab- sorbing combined water or elements of water from molecules of compounds are called?
Last Answer : Dehydrating agent
Description : Those substances which have so far not been resolved by any means into other substances of simpler form are called A. elements B. compounds C. atoms D. molecules
Last Answer : Answer: A
Description : What is two or more substances that are together but do not combine to form a new pure substance?
Last Answer : What is the answer ?
Description : What type of reaction occurs when two or more simpler substances combine to form a more complex one?
Last Answer : Need answer
Description : What substances combine without a chemical reaction?
Last Answer : These substances are called reactants.
Description : What is a result of mixing the two substances shown here together?
Description : Free energy change of mixing two liquid substances is a function of the (A) Concentration of the constituents only (B) Quantities of the constituents only (C) Temperature only (D) All (A), (B) and (C)
Last Answer : D) All (A), (B) and (C)
Description : Which of the following elements behave chemically both as metal and a non- metal?
Last Answer : Boron
Description : 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
Last Answer : (D) None of these
Description : Radon differs from other naturally radioactive elements in which one of the following ways. Is it because radon w) is extremely radioactive x) decays into the element radium y) is a noble gas z) is as chemically active as fluorine
Last Answer : ANSWER: Y -- IS A NOBLE GAS
Description : how does carbon, hydrogen, and oxygen from sugar combine with other elements to make amino acids
Last Answer : I would suggest that you read your text book as this is not a question that can be answered in a line or 2 or you can read here: http://www.chemistryland.com/ElementarySchool/BuildingBlocks/BuildingOrganic.htm
Description : What group consists of elements that will not form an acid when combine with hydrogen?
Last Answer : These are metals.
Description : What is a chemical reaction in which 2 elements combine to form a compound is called?
Last Answer : Feel Free to Answer
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)
Description : Are organic compounds electrolytic or covalent substances ?
Last Answer : Organic compounds are covalent substances.
Description : There are a multitude of various dressings available. Which of the following statement(s) is/are true concerning options for surgical dressings? a. Hydrocolloids, such as karaya compounds, offer ... are highly useful in debriding necrotic and fibrous material from wounds and absorbing wound serum
Last Answer : Answer: a, d Although the simplest dressing of gauze and tape combined with the use of antibacterial ointment can achieve moist wound healing in most patients. A multitude of other ... agents have high absorbency for tissue wound fluid and debride necrotic and fibrous material from the wound
Description : During discharge of a lead-acid storage battery, which of the following actions occurs? A. The acid becomes stronger. B. Both plates change chemically to ammonium chloride. C. The acid becomes weaker. D. Hydrogen gas is liberated.
Last Answer : Answer: C
Description : Which of the following activities occurs during the charging process of a lead-acid storage battery? A. The specific gravity of the acid increases. B. Both plates change chemically to lead sulfate. C. The specific gravity of the acid decreases. D. Hydrogen gas is absorbed.
Description : Caution must be exercised during the charging of lead-acid storage batteries as _____________. A. the acid will become weaker B. hydrogen gas is being continuously liberated C. both plates are changing chemically to lead sulfate D. lead peroxide in the negative plate is poisonous
Last Answer : Answer: B
Description : What is used to break down compounds into elements during electrolysis?
Last Answer : nv hv
Description : 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
Last Answer : Ans:(b)
Description : Are all substances elements but all elements are not substances?
Description : Are the basics substances that make up matter elements?
Last Answer : Yes - or atoms.
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
Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Description : Carbohydrates are commonly found as starch in plants storage organs. Which of the following five properties of starch (1-5) make it useful as a storage material? (1) Easily translocated (2) Chemically non-reactive (3) Easily digested by ... 5) (b) (1) and (5) (c) (2) and (3) (d) (2) and (4).
Last Answer : (d) (2) and (4).
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
Description : Which one of the following takes place during a nuclear fusion? (1) a heavy nucleus bombarded by neutrons breaks up (2) a heavy nucleus breaks up spontaneously (3) two light nuclei combine to form a heavy nucleus (4) a light nucleus breaks up spontaneously
Last Answer : two light nuclei combine to form a heavy nucleus
Description : Which one of the following statements is not correct ? (A) Business firms combine to avoid wasteful competition (B) Business combination is possible only among joint stock companies (C) Business ... firms (D) During economic depression, small firms are absorbed by financially sound large firms
Last Answer : Answer: Business combination is possible only among joint stock companies
Description : According to the text, cost tradeoffs enable firms to A)resolve pricing conflicts among competitors. B)minimise risk during the test marketing of new products. C)reduce costs of all ... . D)resolve pricing conflicts within marketing channels. E)combine resources for greatest cost-effectiveness.
Last Answer : E)combine resources for greatest cost-effectiveness.
Description : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature and hydrogen bonding is more important f
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature ... H_(2)O lt H_(2)Te -` boiling point
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ... oxides are usually covalent and acidic in nature
Description : During percussion drilling (A) Ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole (B) Caving or mixing of strata are caused in soft soils or ... The soil to a considerable depth below the bottom of the hole gets disturbed (D) All the above
Last Answer : Answer: Option D
Description : Which element behaves chemically both as metal and nonmetal? (1) Argon (2) Boron (3) Xenon (4) Carbon
Last Answer : (2) Boron Explanation: Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor nonmetals are called Noble Gases.
Description : Ribosomes are chemically composed of (A) Protein (B) Only DNA (C) RNA (D) Both A + C
Last Answer : (D) Both A + C
Description : Which element behaves chemically both as metal and nonmetal ? (1) Argon (2) Boron (3) Xenon (4) Carbon
Description : The inorganic elements or compounds which occur naturally in the earth’s crust are known as?
Last Answer : minerals
Description : What kind of elements generally form coloured compounds?
Last Answer : Transition metals
Description : Elements are made of -----? A. Atoms (Answer) B. Molecules C. H2O D. Compounds
Last Answer : A. Atoms (Answer)
Description : What Based on the content of most fertilizers name two elements other than carbon that are found in compounds in plants?
Last Answer : Nitrogen and phosporus
Description : Two elements which can form a large number of compounds are (1) Carbon and Hydrogen (2) Carbon and Nitrogen (3) Carbon and Oxygen (4) Carbon and Sulphur
Last Answer : (1) Carbon and Hydrogen Explanation: The carbon-hydrogen bond (C-H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. Compound classes ... bonds are alkanes, alkenes, alkynes, and aromatic hydrocarbons. Collectively they are known as hydrocarbons.
Last Answer : Carbon and Hydrogen
Description : Phospholipids are important cell membrane components because (A) They have glycerol (B) They can form bilayers in water (C) They have both polar and non polar potions (D) They combine covalently with proteins
Last Answer : Answer : C
Description : What is true about Grid Computing? A. breaks complex task into smaller pieces B. combine smaller task into complex task C. subscription tier play vital role in Grid Computing D. Both A and B
Last Answer : breaks complex task into smaller pieces
Description : What are computers called that combine the functions of both analog and digital computers?
Last Answer : Hybrid computers.