Diamond is chemically (a) a mixture of metal carbonates (b) pure carbon (c) a pure form of sand (d) a mixture of calcium and magnesium phosphates

Diamond is chemically (a) a mixture of metal carbonates (b) pure carbon (c) a pure form of sand (d) a mixture of calcium and magnesium phosphates
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Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are (A) Carbonates (B) Sulphates (C) Silicates & phosphates (D) Bi-carbonates

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Match the following : A. Chernozems 1. Rich in calcium carbonate B. Black soil 2. Contains aluminium compound C. Laterite 3. Richest soils in the world D. Terra Rosa 4. Formed in limestone E. Alluvial soil 5. It is a mixture of clay, sand and silt A B C D E (a) 1 2 3 4 5 (b) 3 1 2 4 5 (c) 4 5 3 1 2 (d) 3 4 5 2 1

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Which element behaves chemically both as metal and nonmetal? (1) Argon (2) Boron (3) Xenon (4) Carbon

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The two metal ions that cause hardness to water are: (1) Calcium, Magnesium (2) Sodium, Calcium (3) Sodium, Potassium (4) Sodium, Magnesium

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"Hard" water is related to the presence of high concentrations of primarily four metal ions in water supplies. Calcium and magnesium ions are the most common of the four. Name one of the other two ions.

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The two metal ions that cause hardness to water are: (1) Calcium, Magnesium (2) Sodium, Calcium (3) Sodium, Potassium (4) Sodium, Magnesium

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Where does the oxygen that keeps us alive come from? A. Carbon dioxide B. Carbonates absorbed from soil C. Oxides of minerals D. Water

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Where does the oxygen that keeps us alive come from? (1) Carbon dioxide (2) Carbonates absorbed from soil (3) Oxides of minerals (4) Water

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Oxygen which is vital for life is a product of photosynthesis and comes from – (1) carbonates from soil (2) carbon dioxide (3) water (4) oxides of mineral elements

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The majority of carbon dioxide produced by our body cells is transported to the lungs as (a) attached to haemoglobin (b) dissolved in the blood (c) as bicarbonates (d) as carbonates.

Description : The majority of carbon dioxide produced by our body cells is transported to the lungs as (a) attached to haemoglobin (b) dissolved in the blood (c) as bicarbonates (d) as carbonates.

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Which of the following is NOT a means of preparing carbon dioxide? w) burning coke in the absence of air x) combustion of methane y) heating certain normal carbonates z) action of acids on carbonates

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Oxygen which is vital for life is a product of photosynthesis and comes from (1) carbonates from soil (2) carbon dioxide (3) water (4) oxides of mineral elements

Description : Oxygen which is vital for life is a product of photosynthesis and comes from (1) carbonates from soil (2) carbon dioxide (3) water (4) oxides of mineral elements

Last Answer : water

Where does the oxygen that keeps us alive come from? (1) Carbon dioxide (2) Carbonates absorbed from soil (3) Oxides of minerals (4) Water

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Epsom salt is chemically known as-----? A. Copper Sulfate B. Magnesium Sulfate (Answer) C. Ferrous Sulfate D. None of these

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Grignard reagent is chemically known as (A) Ethyl magnesium chloride (B) Methyl magnesium chloride (C) Dichlorophenol (D) Monochloroacetic acid

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Which of the following is not a component of chlorophyll? (1) Hydrogen (2) Magnesium (3) Carbon (4) Calcium

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Which among the following is a covalent compound? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

Description : Which among the following is a covalent compound? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

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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.

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Last Answer : (d) phosphorus and sulphur.

Which of the following is not a feature of potable water? a) It must be clean, colourless and odourless. b) It must be free from bacteria c) It must have excessive sodium ,calcium and magnesium d) It must contain dissolved oxygen and carbon dioxide

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Last Answer : c) It must have excessive sodium ,calcium and magnesium

Which of the following is not a component of chlorophyll ? (1) Hydrogen (2) Magnesium (3) Carbon (4) Calcium

Description : Which of the following is not a component of chlorophyll ? (1) Hydrogen (2) Magnesium (3) Carbon (4) Calcium 

Last Answer : Calcium

Which among the following is a covalent compound ? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

Description : Which among the following is a covalent compound ? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride

Last Answer : Carbon tetrachloride

The liquid used for the washing of coal in an industrial coal washery is a mixture of water and (A) Carbon tetrachloride (B) Sand (40%) (C) Mineral oil of high viscosity & specific gravity (1.6) (D) None of these

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Last Answer : (B) Sand (40%)

In a chemically pure state, diamonds are (a) Monochromatic (b) Polychromatic (c) Colourless (d) None of these

Description : In a chemically pure state, diamonds are (a) Monochromatic (b) Polychromatic (c) Colourless (d) None of these

Last Answer : Ans:(c)

Chemically glass is a mixture of

Description : Chemically glass is a mixture of

Last Answer : sodium and calcium silicate.