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प्रश्न
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
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उत्तर
A metal that gives dazzling effect to crackers when they explode is magnesium.
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संबंधित प्रश्न
Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
Give a reason for the following:
Alkali metals are good reducing agents.
Write the name and formula of a metal hydride.
Which property of graphite is utilised in making electrodes?
State five uses of metals.
State one use of the following metal:
Mercury
Mention two uses of the following metals and non-metals
Gold
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Tick (√) the most appropriate answer.
Graphite is used :
State two important uses of following metal
Uses of tin
Why are alkali metals kept in kerosene oil?
Write scientific reason.
Sodium is always kept in kerosene.
Name the following:
The most reactive halogen.
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
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.
A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.
An element which is always lustrous, malleable and ductile is ______.
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
The liquid metal at room temperature ______.
Which metals are liquid at room temperature?
