In extraction of metals in the middle of activity series before reduction they are converted into ……………..
A) Metal chlorides
B) Mefal carbonates
C) Metal oxides
D) Metal sulphates
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9. Write notes on: (a) Continuous series (b) Discrete series (c) Individual series
(a) Continuous series is the third series followed by individual and discrete series. (b) In these series all the items are divided in certain groups, but these groups are not continuous, therefore...
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Calculate the energy released in kilowatt-hours when 100g of `._(3)^(7)Li` are converted into `._(2)^(4)He` by proton bombardment. Mass of `._(3)^(7)L
Correct Answer - `._(3)^(7)Li + ._(1)^(1)H` (proton) `rarr 2 ._(2)^(4)He + Q` (energy released), 6.554 xx 10^(6) kWh`
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`C_(4)` plants are spacial, They have special type of (A)_____ they tolerate (B)____,they show a response to (C)______, they lack a process called (D)
Correct Answer - A-leaf anatomy B-Higher temperature C-High light intensities D-Photorespiration E-productivity f biomass
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20. A coconut of mass \( 2 Kg \) is falling from a coconut free of height \( 10 m \). Find the potential energy, kinetic energy and total energy at the following points. \( \left( g =10 m / s ^{2}\right) \) a) Before falling from the coconut tree. b) Just before hilting the ground. c) At a height \( 4 m \) from the ground. d) Which law is evident from this example?
(a) Given m = 2 kg h = 10 m Potential energy at before falling from the coconut tree. u = mgh u = 2 x 10 x 10 u = 200 joule Kinetic energy will...
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A Stock Exchange is a place where finanacial assets can be converted into cash. It helps in fixing the market value of securities and helps to know th
Correct Answer - (i) the functions referred in above para are: (a) Provide liquidity (b) Helps in price discovery (c) Economic barometer (ii) Other functions of stock exchange are: (a)...
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The method used for extraction of metals at the top of the activity series is ……………..
C) Electrolysis of their fused compounds
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The ores of metals in the middle of activity series generally present in the form of……………..
D) (i) and (iv)
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Generally metallic oxides are converted into metals by ……………..
D) Reduction
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Middle ear opens into the inner ear through
C) round window
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Write the uses of i. alkali metals ii. alkaline earth metals
i. Uses of alkali metals: Lithium metal is used in long-life batteries used in digital watches, calculators and computers. Liquid sodium is used for heat transfer in nuclear power stations. Potassium chloride is...
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