Which of the following is commonly called a ‘polyamide’?
1 Rayon
2 Orlon
3 Terylene
4 Nylon
A mixture of salt and sand can be separated by 1 Sublimation 2 Dissolving in water 3 Gravity separation 4 Dry distillation
Soda water contains 1 Nitrous acid 2 Carbonic acid 3 Carbon dioxide 4 Sulphuric acid
Which of the following roofs provide better protection against heat? 1 Cement slab 2 Asbestos sheets 3 Reinforced concrete 4 None of these
An atom of an element with mass number 23 and atomic number 11 will have 1 11 neutrons, 12 protons and 11 electrons 2 11 protons, 12 neutrons and 11 electrons 3 11 neutrons, 11 protons and 12 electrons 4 23 protons and 11 electrons
Which are the important pulsating nebulae?
The year in which magnetic observations were started in mumbai and thiruvananthapuram?
the basic approach to science was established by:
Water is neither acidic nor alkaline because 1 It cannot accept or donate protons 2 It boils at a high temperature 3 It can dissociate into equal number of hydrogen ions 4 It cannot donate or accept electrons
I am a student of class 12. PCMB group. I am not getting admission in any of the medical colleges. And I am not good at math. So what are the options available for me????
An element that does not occur in nature but can be produced artificially is 1 Thorium 2 Radium 3 Plutonium 4 Uranium
which of the following fibers is generally preferred for making gauze and lint? 1 Cotton 2 Rayon 3 Nylon 4 Terylene
The element required for solar energy conversion is 1 Germanium 2 Silicon 3 Uranium 4 None of these