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Some small cubes of same height 7 cm but variable length and width are put inside a large cuboid of height 21 cm. Length and width of cuboid is 32 cm and 24 cm, respectively. Small cubes are put such that cubes at the bottom most layer is of similar base area; second layer contains all the cubes of similar base area and third layer have all the cubes of similar base area. Which of the following statement(s) given below is / are TRUE? A: If side of each small cubes at bottom most layer is 8 cm, then maximum number of small cubes that can be put at bottom most layer is 12. B: If maximum of 48 cubes can be put at second layer, then side of each cube at second layer is 6 cm. C: If side of each small cubes at third layer is 1.6 cm, then maximum number of small cubes that can be put at third layer is 300.
Which of the following statements is/are correct? A. Iron can replace zinc from zinc sulphate solution. B. Zinc can replace copper from copper sulphate solution. C. Copper can replace Iron from Iron sulphate solution.
Mr. Mukesh is a trader having products A and B. A contains 40% iron and 60% zinc, and product B contains 35% iron, 40% zinc and 25% bronze. If products A and B are mixed in the ratio 1 : 4, then what percentage of iron and zinc will be present in the newly made product respectively?
Thin layer of material B (of total amount m) is plated on the end faces of two long rods of material A. These are then joined together on the plated side (see the figure below) and heated to a high temperature. Assuming the diffusion coefficient of B in A is D, the composition profile CB along the rod axis x after a time t is described by
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Two alloys of zinc and copper are combined in the ratio 3 : 5 by volume. The resultant alloy is a 45% zinc alloy. What will be the proportion of zinc in the first alloy if the proportion of zinc in the second is 70%?
Identify the correct set.  Set Physical Changes Chemical Changes A Ozone formation from Oxygen, Condensation Rusting, Burning of candle B Evaporation, Alloy formation Rusting, Curd formation C Condensation, Evaporation Combustion, Galvanization D Galvanization, Alloy formation Crystallization, Condensation
Which one of the following alloys is not properly matched with regard to its composition? Alloy Composition (1) Brass Copper and zinc (2) solder Lead and Zinc (3) Gunmetal Copper, Tin, and Zinc (4) Nichrome Nickel, Iron, and Chromium
In a federal system why a Judiciary is essential ? a. To enterprete the Constitution b. To protect the Fundamental Rights c. To protect the Supremacy of the Constitution d. To protect Democratic system e. To settle disputes between centre and states f. To protect parliamentary system
Zinc is used to protect iron from corrosion because zinc is
Zinc is used to protect iron form corrosion because zinc is