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प्रश्न
Select the correct answer to the statement given below:
A non-metal which exists in the liquid state.
विकल्प
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Bromine
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संबंधित प्रश्न
Give one example for the following type of mixtures
solid-solid homogenous mixture.
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
Write true or false
All pure substances have characteristic melting and boiling points.
Name: a Metal Which is brittle
Define:
Atomicity
Give one use of the following substance:
Brass
Give reason: A frying pan is made up of steel but its handle is made up of wood.
Fill in the blank
A liquid non-metal is _______.
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Complete the statement given below by filling in the blank with the correct word.
The basic unit of an element is an __________.
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
Select the correct answer from the choice given below to complete the sentence :
Compounds are ____________ in nature.
Give a reason for the following statement :
The filter paper made into a cone & placed in a funnel for filtering out the solid particles in a solid-liquid mixture should be moistened before placing it.
______ is a mixture of gases.
Reason out
Elements are called semimetals.
