General Science Class 10

Ozone layer is part of :

1. Mesosphere
2. Stratosphere
3. Thermosphere
4. Troposphere

Which is not part of greenhouse gases?

1. Carbon dioxide
2. Methane
3. Nitrous oxide
4. Oxygen

Second most abundant constituent of dry air in terms of volume after nitrogen is?

1. Nitrogen
2. Oxygen
3. Argon
4. Carbon Dioxide

Which of the following is the reason of global warming?

1. Presence of sulphite
2. Rise in CO2 concentration
3. Oxides of nitrogen
4. Formtion of ozone

The altitude on stratosphere is :

1. 40 to 45 km
2. 50 to 55 km
3. 60 to 65 km
4. 70 to 75 km

Ozone is a gas found in the layer?

1. Troposphere
2. Mesosphere
3. Stratosphere
4. Exosphere

Which of the following water borne diseases is of viral origin?

1. Typhoid fever
2. Polio
3. Dysentery
4. Diarrhea

How much percentage (%) of the Earth's Surface is covered with water?

1. 70%
2. 60%
3. 90%
4. 75%

Which type of bond is formed between H₂O molecules?

1. Hydrogen bond
2. Ionic bond
3. Covalent bond
4. All of these

The permanent hardness of water is due to presence :

1. MgSO4
2. Mg(HCO3)₂
3. CA(HCO3)2
4. All of these