Questions

You have to consider three things.

1. First, are the bonds polar?

Look at differences in electronegativity and if  it is >0.5, bonds are polar.

2. Second, does the molecule have unshared electron pairs?

If so, they generally lead to a polar molecule.

3. Third, is the molecule symmetric?

If so, then although the bonds may be polar, the symmetry cancels out the individual bond polarity and the molecule is non polar.

CF4 follows all the rules above and has a symmetric distribution of charge, making it nonpolar. The others all have asymmetric charge distributions.

Hence, CF4 represents a Non-polar molecule.

Acid which is present in vinegar is approximately 5 % of acetic acid. This can be confirmed by testing the vinegar with magnesium which gives out hydrogen as a gas.

Some common foodborne illness are like vomiting, diarrhea, fever, chills and abdominal pain. These all are acute i.e, they last for only some time and be cured without medication and some times by medication.

If we read the question clearly twice, we can understand that the name of the horse on which the cowboy rides into town is FRIDAY.

The International Trade Centre (ITC) has celebrated the first-ever International MSME Day on June 27, 2017 with theme ‘Small business – big impact’. The purpose of the day is to raise public awareness about the importance of MSMEs to economic growth and international development. The Micro, Small and Medium Enterprises (MSME) Day highlights the strong contribution of MSMEs worldwide to livelihoods, communities and economies and the need to support MSMEs towards their success. The ITC is the joint agency of the UN and the WTO supporting SMEs in developing countries and transition economies for sustainable and inclusive trade.

Sharjah, the city of United Arab Emirates (UAE), has been designated as the UNESCO World Book Capital 2019 by Irina Bokova, the Director-General of UNESCO, at the Headquarters of the International Federation of Library Associations (IFLA) at La Haye. The honour is in recognition of the Emirate’s pioneering role in supporting and expanding the local and regional publishing industries, promoting reading to become an intrinsic cultural practice, as well as embracing inter-cultural, knowledge-based dialogue. Sharjah was the first emirate in UAE to establish a formal school and a library. It was also the first emirate to house many cultural institutions like the Emirates Publishers Association and the Emirates’ writers Union. Sharjah is the 19th city to become World Book Capital. It is preceded by Conakry in 2017 and Athens in 2018.