A small amount of silica gel and a small amount of anhydrous calcium chloride are placed separately in two beakers containing water vapour. Name the phenomenon that takes place in both the beakers.
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Bone matrix is rich in (a) fluoride and calcium (b) calcium and phosphorus (c) calcium and potassium (d) phosphorus and potassium
(b) calcium and phosphorus
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Write the chemical formula of the following: (a) Magnesium chloride (b) Calcium oxide (c) Copper nitrate (d) Aluminium chloride (e) Calcium carbonate
(a) Magnesium chloride →MgCl2 (b) Calcium oxide →CaO (c) Copper nitrate →Cu(NO3)2 (d) Aluminium chloride →AlCl3 (e) Calcium carbonate →CaCO3
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A mixture of fragmented DNA was electrophoresed in agarose gel. After staining the gel with ethidium bromide, no DNA bands were observed.
The reasons are as follows: (i) DNA sample that was loaded on the gel may have got contaminated with nuclease (exo-or endo-or both) and completely degraded. (ii) Electrodes were put in opposite...
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A mixture of fragmented DNA was electrophoresed in agarose gel. After staining the gel with ethidium bromide, no DNA bands were observed
The reasons are as follows: (i) DNA sample that was loaded on the gel may have got contaminated with nuclease (exo-or endo-or both) and completely degraded. (ii) Electrodes were put in opposite...
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In what ways these are different : (a) a sol and a gel (b) a gel and an emulsion ?
[Hint : (a) For a sol : Dispersed phase : Solid; Dispersion medium :Liquid For a gel : Dispersed phase : Liquid, Dispersion medium : Solid (b) For a gel : Dispersed phase : Liquid, Dispersion medium Solid For an emulsion : Dispersed...
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Enlist two sources for calcium and iron separately.
Calcium sources: Cheese, Milk, Orange Juice, Eggs, Yogurt, grams, Leafy Vegetable and cereals. Iron sources: liver, meat, orange juice, egg, dry fruits, spinach, banana and green leafy vegetables.
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Three beakers labelled as A, B and C each containing 25 ml of water were taken. A small amount of NaOH,
(C) (i) and (iv)
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Marble contains ,(A) calcium hydroxide (B) calcium chloride (C) calcium carbonate (D) calcium oxide
(C) calcium carbonate Marble contains calcium carbonate and its chemical formula is CaCO3.
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You have four beakers A, B, C and D. Out of A and B one has hard water and the other has soft water.
On adding soap solution, lather will be formed in the beaker containing soft water only. On adding detergent solution lather will be formed by both hard and soft water.
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What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis ?
The correct answer is (1) DNA fragments during gel electrophoresis, separate (resolve) according to their size due to sieving effect provided by agarose gel
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