The PH of an aqueous solution of a salt is 4.5. Which of the following about this salt is true?
After rising a short distance the smooth column of smoke from a cigarette breaks up into an irregular and random pattern. In a similar fashion, a stream...
Which gas is used in the process of photosynthesis?
A body falls freely from a height of 80 m. Time taken to reach the ground is:
The Planck constant is used to:
What are the elements which are liquids at room temperature and standard pressure?
1. Helium
2. Mercury
3. Chlorine
4. Bro...
Which organ is known as the “filter” of the blood?
A neutral atom has 9 electrons and mass number is 19. What is the number of neutrons in the atom?
Which element has the highest electron affinity?
To measure the speed of an approaching car a police officer shines –
