Question

please answer 1st to 12 question

Answer 1

1). it doesn't cause pollution.
they should have high calorific value
they should not leave any Residue after burning
cheaply and easily available.

2). some substances burn with flame while some burn as without flame because the substances which burn without flame have high ignition temperature like white phosphorus has its ignition temperature between 25 degree Celsius to 30 degree Celsius and it can easily born at room temperature.
6). galvanization:- zinc is coated on Iron to prevent it from rusting this process is known as galvanization.
the purpose to served it is to prevent iron from rusting.

Answer 2

General Knowledge forms an important section in most entrance examinations. It’s observed that many a time the General Knowledge questions and answers are ignored by the candidates as they immerse themselves in the more scoring subjects like Mathematics, Physics, Chemistry, and Analytical Reasoning. In any competitive examination, around 25% of the paper carries the General Knowledge and Current Affairs questions. So, if you’re an aspirant who wants to get an admission into the top colleges across the country or succeed at any of the Government job examinations, then it’s very important for you to stay abreast of current affairs and General Knowledge topics. A thorough grasp of the General Knowledge topics and questions enables you to score higher and also gives you an advantage edge over others in the Group Discussions and Personal Interview rounds of the entrance test.