What is the chemical name of baking soda?
Ball pen functions on the principle of :
Which substance is a multibranched polysaccharide of glucose used for energy storage in animals and fungi?
Which of the following is the hardest mineral?
A radioactive substance emits?
The washing machine works on the principle of -
What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius?
Which endocrine gland requires iodine to synthesize a particular hormone, whose deficiency may cause goitre disease?
Which of the following is the most abundant element on earth?
The fossil of Archaeopteryx represents the evidence of origin of