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प्रश्न
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
For the reduction of a metal oxide, suggest a reducing agent other than carbon.
Give reasons
Graphite is used in the leads of pencils
Give reasons
Gold is mixed with copper and nickel.
A metal with melting point less than 50°C is
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
Write ‘True’ or ‘False’ in front of following statement.
Magnesium is used in making light weight alloys of aluminium.
State two important uses of following metal
Uses of lead
State two important uses of the following metal.
Uses of magnesium
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Oxygen
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Water.
What was Mendeleev's basis for the classification of elements?
With reference to the following metals state their use in daily life metal:
copper
With reference to the following metals state their use in daily life metal:
Zinc
Give a reason why iron objects rust easily but the iron pillar at Qutab Minar has not rusted over the years.
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
Why are bells made of metals?
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?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
