Subject :NSO Class : Class 7
Subject :NSO Class : Class 6
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Subject :NSO Class : Class 8
Ans 1:
Class : Class 8
Nerve cells are the specialised cells whose basic function is to transmit signals from our whole body to the brain.
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Subject :NSO Class : Class 8
Ans 1:
Class : Class 9
A thylakoid is a compartment present inside chloroplasts* and cyanobacteria**. They are the sites responsible for light dependent reactions during photosynthesis. They consist of a thylakoid membrane surrounding a thylakoid lumen. *a plastid in green plant cells which contains chlorophyll. **a bacteria which obtain energy from photosynthesis. A VERY EASY TOPIC IF YOU ARE ABLE TO UNDERSTAND IT.
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Subject :NSO Class : Class 7
Ans 1:
Class : Class 9
-pH stands for potenz Hydrogen, pH value indicates whether the substance is acidic, basic of neutral.
- pH less than 7 is acidic
-pH greater than 7 is basic
- pH equal to 7 is neutral ( neither acidic nor basic)
Ans 2:
Class : Class 8
pH is the negative logarithm of H+ ions.
A substance having <7 pH is a Base
A substance having >7 pH is an Acid
Exact pH 7 is a neutral substance
Ans 3:
Class : Class 7
pH scale is a numerical representation of acidity and basicity of the substances. It varies from 1 to 14. The solutions with a pH value less than 7 are referred to as bases and those with a pH value of 7 are to as neutral.
Ans 4:
Class : Class 8
pH value are the value used to determine wheather a solution is acid or basic in nature
Acids= pH<7
Bases= pH>7
Neutral= pH=7
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Subject :NSO Class : Class 8
Ans 3:
Class : Class 7
You cant simply earn batches in your house, it is just an online thing. I am not sure now but it used to be by getting 5000 points
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Subject :NSO Class : Class 8
Ans 2:
Class : Class 8
are you mad? olympiad is the best exam to test your logical,subjective and objective skills
Ans 10:
Class : Class 9
NO WAY!!! How can you say that? Participate and get first rank. Then you'll see.
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Subject :NSO Class : Class 8
Ans 1:
Class : Class 8
Thermo plastics- Plastics which are obtained by gentle heating and then moulding and they can be moulded again and again by gentle heating.
Thermosetting plastics- Plastics which are obtained by gentle heating and then moulding but they cannot be moulded again and again by heating .
Ans 2:
Class : Class 9
Thermosetting plastics are synthetic materials that strengthen during being heated, but may get damaged when being tried to molded again. Thermoplastics are different. They can be remelted back into liquids and can be remolded also.
Ex for thermosetting: epoxy resin(m-seal), melamine, urea formaldehyde etc.
Ex for thermoplastics: polythene, polypropylene, polystyrene etc.
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 6