Question 3 :
Consider following statements<br> I. Cationic polymerization occurs in monomers with electron donation substituents.<br> II. Anionic polymerization occurs in monomers with electron-withdrawing substituents.<br> III. Head-to-head chain-growth polymerization occurs in polystyrene<br> Select correct statements

Question 5 :
The compound that inhibits the growth of polymer chain during vinyl polymerization, is

Question 11 :
Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true:

Question 13 :
<img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5e79bbd4a2bddf222e0b070a' height='76' width='50' >and <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5e79bbd5ced10523befef544' height='67' width='62' > can be differentiated by :<br>

Question 17 :
Which element has an oxide that is used as a food preservative?

Question 19 :
Currency notes can be marked with an invisible ink. Thieves can be trapped because this ink

Question 20 :
The sweeteners value of aspartame in comparison to cane sugar is:

Question 21 :
$2ZnS(s) + 3O_{2}(g) \xrightarrow {heat} 2ZnO(s) + 2SO_{2}(g)$ is an example of which type of reaction?

Question 22 :
Concentration by froth floatation is applicable for which of the following ores?<br>

Question 23 :
When $Fe_2O_3$ is heated with aluminium powder, the products obtained are _______ .<br/>

Question 24 :
Generally sulphide ores are concentrated by which of the following process?<br/>

Question 25 :
Various processes involved on the extraction of metals from their ores and refining are known as:

Question 27 :
What is the process of leaching in case of low grade copper ores?

Question 28 :
When manganese dioxide is heated with aluminium powder, the products obtained are _________ .<br/>

Question 29 :
The process to heat the ore in the presence of excess supply of air below its melting point is called as ________.<br/>

Question 30 :
How do we separate two sulphide ores by froth floatation method?