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प्रश्न
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
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उत्तर
(i) Chlorine – greenish-yellow
(ii) Nitrogen dioxide – reddish brown.
संबंधित प्रश्न
Give one example for the following type of mixtures
solid-solid homogenous mixture.
State four differences between compounds and mixtures.
Tick (√) the correct alternative from the choice given for the following statement.
Brass and bronze are
Complete the statement – an element is a pure substance made up of ____________ atoms.
Give the name of the radical - OH
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
State four differences between – elements, compounds and mixtures with suitable examples.
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Give an example for the elements derived from their Latin names.
