Science (Quiz)
For CTET (Env. Studies Paper-1), Class 6, 7, 8 and NTSE
Q1: Which of the following is an energy giving food?
(a) Bread
(b) Pulses
(c) Fish
(d) Green Vegetables
Blog provides NCERT solutions, CBSE, NTSE, Olympiad study material, model test papers, important Questions and Answers asked in CBSE examinations. References to Educational Sites and resources.
Potable Water is Precious (credits: openclipart) |
S.No. | Breathing | Respiration |
---|---|---|
1 | It involves the intake of oxygen and release of Carbon dioxide. | Respiration is more complex and it includes breathing as well as oxidation of food in cells to release energy. |
2 | It is a physical process i.e. exchange of gases. | It is a biochemical process in which food is broken along with the release of energy. |
3 | It involves breathing organs e.g. lungs in mammals. | It occurs at a cellular level |
pH value is used to indicate acidic, basic or neutral nature of a substance. credits: wikicommons |
SNo. | Properties | Acids | Bases |
---|---|---|---|
1. | Taste | Sour Taste | Bitter Taste |
2. | Litmus Test | Turn blue litmus into red. | Turn red litmus into blue |
3. | Dissolved in water | Give H+ ions (responsible for its acidic nature) | Give OH- ions (responsible for its basic nature) |
4. | Action with metals | Give Hydrogen Gas | Generally do not react. |
5. | Action with Ammonium Salt | Do not react | Give ammonia gas |
6. | Action with phenolphthalein | Do not give any colour. | Give pink colour |
7. | Action with methyl orange | Give red colour. | Give yellow colour. |
8. | Absorb Carbon dioxide | Do not absorb CO2 gas. | Some bases like NaOH absorb CO2 gas. |
9. | Naturally Found | Vinegar, Curd, Citrus fruits, HCl etc. | Lime Water, Soap, Milk of Magnesia etc. |
Sources of Wool (image credits: openclipart.org) |
Melting of Ice Cream (Physical Change) (Source: openclipart.org) |
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