Advertisements
Advertisements
Question
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
Options
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
Solution
Nitrous oxide
APPEARS IN
RELATED QUESTIONS
What are the different types of mixtures ?
Define the term: Element
Name: the Hardest Naturally Occurring Substance
Give two examples of Metals.
Name: Two substances used to make electric wires
Name A substance used as an insulator.
Find the atomicity of the Following molecule:
Calcium Chloride
Indicate whether the following statement is true or false:
Molecules combine to form atoms
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Give the name of the radical - SO4
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt, and O; the element which is metallic is ____, an inert element is ____, forms a triatomic molecule is ____, is liquid at room temperature is_ ___.
Match the compounds in List I – 1 to 20 with their correct formulas from in List II-A to T.
| List I | List II | ||
| 1 | Hydrochloric acid | A | NaCI |
| 2 | Potassium Hydroxide | B | NaOH |
| 3 | Sulphuric Acid | C | KCI |
| 4 | Zinc Hydroxide | D | Ca(OH)2 |
| 5 | Sodium Chloride | E | CaS |
| 6 | Nitric Acid | F | CuSO4 |
| 7 | Calcium Hydroxide | G | CaCO3 |
| 8 | Carbonic Acid | H | NH4CI |
| 9 | Sodium hydroxide | I | HCI |
| 10 | Copper sulphate | J | ZnO |
| 11 | Potassium Chloride | K | HNO3 |
| 12 | Calcium Carbonate | L | H2CO3 |
| 13 | Magnesium Sulphide | M | MgS |
| 14 | Zinc Sulphate | N | MgO |
| 15 | aluminium Hydroxide | O | KOH |
| 16 | Sodium Carbonate | P | ZnSO4 |
| 17 | Calcium Sulphide | Q | Na2CO3 |
| 18 | Magnesium Oxide | R | H2SO4 |
| 19 | Zinc Oxide | S | AI(OH)3 |
| 20 | Ammonium Chloride | T | Zn(OH)2 |
Write the names of elements from the following symbol:
Si
Write the names of elements from the following symbol:
Pt
State four differences between – elements, compounds and mixtures with suitable examples.
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
What are elements? What are they made of?
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Name the two elements which are derived from the country.
Name the element which is used in toothpaste to strengthen our teeth.
