Advertisements
Advertisements
प्रश्न
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Marble
Advertisements
उत्तर
Calcium carbonate (Marble) — CaCO3
APPEARS IN
संबंधित प्रश्न
Give two examples of Non-metals.
Tick (√) the correct alternative from the choice given for the following statement.
Brass and bronze are
Differentiate between the terms –
elements, compounds & mixtures.
Elements are classified into – Metals – Non-metals – Metalloids – Noble gases. State which of A, B, C, D is a –
1. Metallic element
2. Non-metallic element
3. Metalloid
4. Noble gas.
A: Is non-malleable, non-ductile & a poor conductor of electricity ___________
B: Has lustre, is malleable and ductile & a good conductor of heat ___________
C: Is unreactive and inert and present in traces in the air _________
D: Shows properties of both metals and non-metals ___________
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.
Element ______ has the symbol derived from its Latin name ‘Argentum’
Write the names of elements from the following symbol:
Br
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
Select the correct answer from A, B, C, D & E for the statement given below :
A metalloid.
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
