Chemistry GK Questions and Answers for Competitive Exams

1. That class of compounds, which contain a functional group –OH, is called alcohol.

2. Alcohols contain a hydrogen atom and a hydroxyl group (-OH) along with a carbon atom.

3. The hydroxyl group is a polar group, which makes the alcohol soluble in water.

1. Hydrogen matches the properties of the first group and seventh group of the periodic table.

2. Following is some additional information about the properties of hydrogen.

- Hydrogen is a highly flammable gas.

-Hydrogen is a major component of water.

- Hydrogen can be used as fuel.

Hydrogen is used in the chemical industry to make many types of products.

Edwin Mattison McMillan (September 18, 1907 – September 7, 1991) was an American physicist credited with being the first to produce a transuranium element, neptunium. For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg.

1. In 1845, the German chemist who published a method for the synthesis of 'acetic acid', a natural product containing two carbon atoms, was Hermann Kolbe.

2. He created carbon disulfide with chlorine, and the end result was carbon tetrachloride.

The electronic configuration of the element with atomic number 20 is 2, 8, 8, 2. 

The element with an atomic number of 20 is Calcium, Ca. 

The electron configuration is found using the Aufbau principle: 1s², 2s², 2p⁶, 3s², 3p⁶, 4s²

It belongs to the 2nd group and 4th period.

The number of moles in 36 grams of water will be 2. The atomic number of any element is its molar mass.

The Correct Answer is J Chadwick. The atomic structure consists of protons, electrons, and neutrons. The nucleus of an atom consists of Protons and Neutrons. J Chadwick was not associated with the atomic model while the remaining three associated with the atomic model.

An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is 19.

The property of metal by which it can be drawn into wires is called ductility.

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.