Exams

The four bonds of carbon tetrachloride (CCl4) are polar, but the molecule is nonpolar because the bond polarity is cancelled by the symmetric tetrahedral shape. Hence, making the net dipole as zero and molecule as non-polar.

When other atoms substitute for some of the Cl atoms, the symmetry is broken and the molecule becomes polar.

Yes, a promise can be broken without being held.

Genetic drift or allelic drift is the change in the relative frequency in which a gene variant (allele) occurs in a population due to random sampling and chance.

When is genetic drift a major factor in evolution is

* When there is low gene flow.

* When there is no selective pressure.

* When there is a bottleneck.

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.