Please select a subject first
Advertisements
Advertisements
Short Answer Type Question:
What do you mean by threshing? Where is it used?
Concept: undefined >> undefined
Short Answer Type Question:
Write three methods of separation.
Concept: undefined >> undefined
Advertisements
What happens if the percentage of oxygen in the air reaches to 70%?
Concept: undefined >> undefined
What happens if the percentage of carbon-dioxide increases in the air?
Concept: undefined >> undefined
Why is carbon-dioxide gas used to extinguish fire?
Concept: undefined >> undefined
How will you prove that soil contains air in it?
Concept: undefined >> undefined
Why do we see the sky and air clear and clean after rainfall?
Concept: undefined >> undefined
Explain why mountaineers carry oxygen cylinders with them?
Concept: undefined >> undefined
Explain why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.
Concept: undefined >> undefined
Short Answer Type Question:
How will you separate oil and water from their mixture?
Concept: undefined >> undefined
Short Answer Type Question:
Define winnowing.
Concept: undefined >> undefined
Short Answer Type Question:
What do you mean by sieving? Give an example.
Concept: undefined >> undefined
Match the column:
| Separation Process | Purpose for which we do the separation | What do we do with the separated components? |
| (1) Separate stones from rice | (a) To separate two different but useful components | (i) We throw away the solid components |
| (2) Churning milk to obtain butter | (b) To remove non-useful components | (ii) We throw away the impurities |
| (3) Separate tea leaves | (c) To remove impurities or harmful components | (iii) we use both the components |
Concept: undefined >> undefined
Long Answer Type Question:
What is threshing?
Concept: undefined >> undefined
Long Answer Type Question:
Describe the method to obtain salt from sea water.
Concept: undefined >> undefined
Long Answer Type Question:
What is decantation?
Concept: undefined >> undefined
Long Answer Type Question:
Where is decantation used? Give two examples.
Concept: undefined >> undefined
Long Answer Type Question:
How will you prepare cheese (paneer)?
Concept: undefined >> undefined
Explain the method that can be used for separating the following mixture:
Sand and husk
Concept: undefined >> undefined
What is open circuit?
Concept: undefined >> undefined
