● Sling psychrometer is used to measure Humidity.

● Humidity is the concentration of water vapour present in the air.

● It can be used to determine the physical and thermal properties of moist air by using standard tables and charts.

 Vacuoles are called as Store house of the cell.

• They are found in both plant and animal cells.

• They can even store waste products so the rest of the cell is protected from contamination.

• In plants, vacuole is surrounded by the tonoplast and fills itself with a solution known as cell sap.

● Turquoise is a mineral of Copper.

● It is an opaque, blue-to-green mineral with chemical formula CuAl₆(PO₄)₄(OH)₈·4H₂O.

● It has been prized as a gemstone and ornamental stone.

● The Biraja Temple, the Rajarani Temple and the Samaleswari Temple are all located in Odisha.

● The Biraja temple was built during the 13th century. The principal idol is Devi Durga, who is worshiped as Viraja.

● Rajarani Temple is an 11th-century Hindu temple located in Bhubaneswar, the capital city of Odisha, India.

● Samaleswari Temple is a Hindu temple in Sambalpur, Western Odisha, India dedicated to the goddess known as 'Maa', also known among the natives as samalei maa, meaning Mother Samaleswari.

* The ‘India Divided’ and ‘Atmakatha’ were written by Dr. Rajendra Prasad.

* His other works are- Mahatma Gandhi and Bihar, Bapu ke Kadmon Mei, Bharatiya Shiksha and Satyagrah at Champaran

* He was elected President of India in 1952 and re-elected in 1957, he was the only President to be re-elected in India.

* He was awarded Bharat Ratan in 1962.

• The Defence Research and Development Organisation (DRDO) has developed an Advanced Chaff Technology to safeguard naval ships against missile attack.

• Chaff is a passive expendable electronic countermeasure technology used worldwide to protect naval ships from enemy’s radar and Radio Frequency (RF) missile seekers.

• The Defence Research and Development Organisation (DRDO) is an agency under the Department of Defence Research and Development in Ministry of Defence.

• It was formed in 1958.

• It is headquartered in New Delhi.

* Sachidanand Sinha headed the first day of Constituent Assembly on 9^th Dec, 1946.

* On December 11, 1946, Dr. Rajendra Prasad was elected as the President of the Assembly.

* HC MUkherjee was elected Vice President of Assembly.

* The Objective Resolution was moved on December 13, 1946 by Pandit Jawaharlal Nehru.

* On 29th August 1947, the Constituent Assembly set up a Drafting Committee under the chairmanship of Dr. B.R. Ambedkar.

Birsa Munda was popularly known as ‘Dharti Abba’ which mean the Earth Father.

* He was born in 1875 in Munda Tribe.

* He led the Ulgulan revolt against British government and awakened masses and sowed the seeds of revolt.

* Alongwith Mundas, Oraons and Kharia tribes also followed the tribal leader.

* His struggle against the exploitation and discrimination against tribal led to the passing of the Chotanagpur Tenancy Act in 1908.

* Union Minister for Finance & Corporate Affairs Smt. Nirmala Sitharaman participated in the 103rd Meeting of the Development Committee Plenary via video conferencing on April 9, 2021.

The main agenda of the conference was:

i. World Bank Group (WBG) and International Monetary Fund Support for Debt Relief Under the Common Framework and Beyond.

ii. COVID-19 pandemic: World Bank Group Support for Fair and Affordable Access to Vaccines by Developing Countries.

● Dementia is a condition in which a person loses his memory.

● Alzheimer's disease is the most common type of dementia which covers 50% to 70% cases.

● Dementia is one of the major causes of disability and dependency among older people worldwide.