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प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
विकल्प
True
False
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उत्तर
Copper displaces zinc from zinc sulphate solution. (F)
संबंधित प्रश्न
State one use of the following metal:
Copper
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
State two important uses of following metal
Uses of lead
Why is hydrogen placed with alkali metals?
Write scientific reason.
Pine oil is used in froth flotation.
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
Complete the following flowchart.
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
