Advertisements
Advertisements
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
Advertisements
उत्तर
Bromine
APPEARS IN
संबंधित प्रश्न
Define mixture.
Differentiate between the following.
Filter Paper and Alum
Give Two Examples for Each of the Following: Non-metals
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Sand
Name: an Inert Gas
Give two examples of the following.
Inert gases
State the number of atoms of each element, present in \[\ce{HNO3}\].
Also name the compound.
Tick (√) the correct alternative from the choice given for the following statement.
Gold is used to make jewellery because
Select the correct answer from the choice given below.
An impure substance
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 |
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.
Define the terms elements, compounds & mixtures with a view to show their basic difference.
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
Give an example of two liquids which form homogenous.
Select the correct answer from A, B, C, D & E for the statement given below :
A noble gas.
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
What are elements? What are they made of?
Water contains _____ and _____ element.
Reason out
Elements are called semimetals.
