Test: General Awareness - 8 - NDA MCQ

This sudden opening allows the gas to expand, rapidly dropping the pressure and the temperature.

The degree Celsius (°C) can refer to absolute temperature. 

Light Emitting Diode (LED) is semiconductor device – a forward bias p-n junction diode which converts electrical energy into light energy. 

Dual Energy X-ray Absorptiometry (DEXA) is used to measure the density or strength of bones. 

The sun is the star at the center of the solar system. It generates its energy by nuclear fusion of hydrogen nuclei into helium. 

Diffusion refers to the process by which molecules intermingle as a result of their kinetic energy of random motion. 

Hydrogen ion has one proton.

Different colours in increasing order of their wavelength: violet, indigo, blue, green, yellow, orange and red. 

The light wave with shortest wavelength i.e. violet refracts the most. 

All these forces don’t need any physical contact to exist hence, non-contact forces. 

Canal system of Firoz Shah Tughlaq: To support the newly founded city of Hissar-i-Firoza, in 1355, he constructed a double system of canals from the Yamuna to Sutlej.
 

Amir Khusrau emerged as a great musician in the Sultanate period. He invented ‘Sitar’ with a combination of Irani Tambora and Indian Veena. He combined some Indian and Persian melodies elegantly and introduced some new melody styles like Iman, Zilf, and Sajgari, etc.
 

In India, tropical evergreen forests are found in the western slopes of the Western Ghats in States such as Kerala and Karnataka.

Saddle Peak is the highest point of the Andaman and Nicobar Islands.
 

In Kesavananda Bharati’s case, the Supreme Court invoked this doctrine of the basic structure. The doctrine of non-amendability of the basic features of the Constitution implies that there are certain provisions in the Constitution which cannot be amended even by the following prescribed procedure under Article 368.

NI=NDP + net foreign income, GNP = GDP + Net income inflow from abroad – Net income outflow to foreign countries & Net Domestic Product = GDP - Depreciation of the Capital goods.
 

In electromagnetism, the magnetic susceptibility is one measure of the magnetic properties of a material. The susceptibility indicates whether a material is attracted into or repelled out of a magnetic field.

The lanthanides have a bright silvery appearance. Five of the elements (lanthanum, cerium, praseodymium, neodymium, and europium) are very reactive. When exposed to air, they react with oxygen to form an oxide coating that tarnishes the surface.

The loss of the elastic tissue (elastin and collagen) in the skin with age causes the skin to hang loosely. This is caused by a flattening of the area where the epidermis and dermis (layer of skin under the epidermis) come together. Skin becomes more easily bruised. This is due to thinner blood vessel walls as we age.

The 10th edition of Systema Naturae is a book written by Swedish naturalist Carolus Linnaeus and published in two volumes in 1758 and 1759, which marks the starting point of zoological nomenclature.