Australian open 2018 was held in Melbourne. Swiss tennis player Roger Federer won the men’s singles title by defeating Marin Cilic of Croatia. It was Federer’s 6^th Australian open crown and overall 20^th grand slam title.

Atal pension yojana become operational from June 1, 2015. This scheme is basically for the workers of the unorganised sector and aims to provide a minimum guaranteed pension of 1000 to 5000 Rs. Per month from the age of 60 years. It is available to all the citizens in the age group of 18-40 years.

Saikhom mirabai chanu is an Indian weightlifter. She is participating in the international events since 2014 in 48 kg category. She was awarded Padma Shri by the government of India in 2018 for her contribution to the sport.

Environmental performance index is calculated on the basis of data gathered from 24 individual metrics of environmental performance. Survey was done on 180 countries in which the rank of India was 177. The list was topped by Switzerland followed by France and Denmark on second and third position.

Vikram Sarabhai space centre is a research centre of ISRO under the Department of Space. Noted scientist S.Somnath who joined ISRO in 1985 took charge as the director of VSSC. He succeeded K.Sivan who was appointed as the chairman of ISRO.

Double-Displacement reaction is a type of chemical reaction where two compounds react and the positive ions and the negative ions of the two reactants switch places to form two new compounds or products.

Phenolphthalein is a colourless indicator used in acid-base titrations. It turns colourless in acidic as well as neutral solutions and magneta in basic solutions.

Chloroform in the presence of sunlight forms a poisonous gas ‘Phosgene’. Phosgene is a major industrial chemical used to make plastics and pesticides. It is highly toxic substance that exists as a gas at room temperature.

Malware is any software intentionally designed to cause damage to computer server, client or computer network. It includes computer viruses, worms, Trojan horses and spyware.