1 |
Which one is not a chemical change. |
Seed germination
Making paper boat
Burning of wood
Cooking food
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2 |
Which factor will not affect the dissolving of sugar is water. |
Adding salt in water
Making sugar powder by grinding
Heating water and sugar
Stirring water and sugar
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3 |
Out of these which answer is correct. |
1 and 2
3 and 1
2 and 3
1 and 4
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4 |
The change of milkd into yougurt is. |
Physical change
Climate change
Chemical change
Change of colour
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5 |
The germs is caused of typhoid |
Fertilizers
Insecticides
Sewerage water
Industrial waste
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6 |
___________ is used in refrigerator. |
CFL
CBC
Chloroflourocarbon
BFC
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7 |
The matters that could not break down into simple substances are called. |
Bio-degradable
Non biodegradable material
Non renewable material
Renewable
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8 |
Agricultural and poisosous substances of factories are also the cause of. |
Air pollution
Environmental pollution
Land pollution
Water pollution
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9 |
Polluted sewerage water is caused of |
Air pollution
Water pollution
Land pollution
Environmental pollution
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10 |
Land pollution is caused by |
Fertilizer
Chemical
Plastic bags
All of these
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