Questions

In 1814, George Stephenson developed steam engine to haul coal from mines to ports by railways. In 1830, the first railway train began to carry passengers and freight from Liverpool to Manchester.

One reason the skeletal system is important is because the skeletal system creates the connective tissue and tendons that allow the body to move.

F9 keystroke is used for updating a field.

The Rolling plan refers to one-year plans in the five-year perspective. under Rolling plan, there would be an annual appraisal of the progress of the plan and on the basis of such an appraisal, the plan for the next year will be prepared. The plan would go on rolling year after year.

The country’s fast-growing e-commerce industry will finally mark its presence at the Advertising Standards Council of India (ASCI), with Paytm set to become a member of the self-regulatory voluntary organisation next month i.e April 2017.

DNA is a double-stranded molecule twisted into a helix. The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA. The rungs of the ladder are pairs of 4 types of nitrogen bases.

The given compound is NaHCO3 Sodium bicarbonate which is commonly known as Baking soda.

Oxidation numbers are the charges on ions. When a neutral atom loses electrons it becomes positively charged. When a neutral atom gains electrons it becomes negatively charged.

Here the C represents the oxidation state of carbon in this compound. Compounds are electrically neutral, which is why we set the sum of the oxidation states equal to zero.

Sodium has a +1 oxidation state. Hydrogen has a +1 oxidation state. Oxygen has a -2 oxidation state. There are three oxygen atoms, which means the total oxidation state provided by both oxygen ions is -6. Adding up these oxidation states we get:

1 + 1 + (-6) + C = 0

-4 + C = 0

=> C = 4

This means the oxidation state of carbon in this compound is +4.