Class 11th

In the medical entrance test NEET, there can be 1 to 3 questions from this chapter. Some year, the Chemistry section of NEET has only one question from this chapter and in some other years, there can be 3 questions.

The following are the key concepts of this chapter: Compound, Elements, Rules, Law of conservation of mass, Addition and Subtraction, Atomic Mass, Law of multiple proportions, and Molecular Mass.

As the name suggests, the first chapter of the NCERT Class 11 Chemistry introduces various basic concepts of chemistry, such as the definition and importance of chemistry, atomic matter and molecular masses, the mole concept, laws of chemical combination, empirical, stoichiometry, and molecular formulas. It also includes the concepts of molarity and molality.

Correct order of reducing character is

NH₃< PH₃< AsH₃< SbH₃< BiH₃

It may vary, depending on the type of substance you are talking about. Some can have their carcinogenic/toxic levels reduced and some may not. Some processes involve detoxification, overheating, altering the chemical structure etc. You can also yourself avoid exposure to these substances by adopting healthy lifestyle habits like jogging, yoga, exercising, sports, meditation etc. and staying away from cigarettes, alcohol, tobacco and others.

There exist different types of cancer, some of which have a remedy to be treated and some of which may never have in the near future. Technologies have advanced, the field of Science and biomedical sector have witnessed significant improvements in the previous decades. Many cancers which seemed impossible to be treated years ago have today a reliable cure. So it depends on which type of cancer and which stage of cancer are you specifically talking about.

Yes. Indeed there are various scientists who are trained to prepare and handle these carcinogens safely in a laboratory. These carcinogens are used to prepare various useful substances such as drugs and medicines so their usage needs to be monitored regularly and handled carefully. The production must comply with legal rules and standards.