Question
Consider the following statements about ozone layer:
1. It protects us from UV rays. 2. It is found in the troposphere. 3. CFCs are harmful to it.Solution
Ozone layer lies in the stratosphere, not troposphere.
The anode of the lead-storage battery is made up of which of the following metal?
Which of the following is the lightest metal?
Which of the following elements has the maximum number of atoms in their molecular form?         Â
...Match the following columns and choose the correct option:
Column I A. Leishmania donovani B. Trypanosoma gambiense C. Entamoeba histolytica D. W...
What is the main ore of aluminum?
The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:
Deficiency of which of the following elements is responsible for weakening of bones?
1. CalciumÂ
2. Phosphorus
3. Nitrogen
...
Which endocrine gland requires iodine to synthesize a particular hormone, whose deficiency may cause goitre disease?
Which of the following is the hardest mineral?
Metallurgy is the process of:
