ANS:C - contradicts

No answer description is available. 

ANS:B - False

FALSE Example: #define symbol replacement When the preprocessor encounters #define directive, it replaces any occurrence of symbol in the rest of the code by replacement. This replacement can be an statement or expression or a block or simple text.

ANS:B - igneous rocks

Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.

Answer: Igneous Rock. Under constant effects of temperature and excessive pressure, Igneous & Sedimentary rocks gets converted into Metamorphic Rocks, and this process is called Metamorphism.

ANS:D - neither X nor Y plates

Time base signal is not connected. The two waves are fed to X and Y plates respectively.

ANS:B - crystallisation

Crystallization is a separation and purification process used to produce solid crystals from a solution, melt, or gas. It is widely employed in various industries, including pharmaceuticals, chemicals, food processing, and materials science, to obtain pure substances or to recover valuable products from solutions. Here's how crystallization typically works:

1. Solution Preparation: Crystallization begins with the preparation of a solution containing the substance to be crystallized (the solute) dissolved in a suitable solvent. The solute may be dissolved in the solvent by heating or agitation until a clear solution is formed.
2. Saturation: The solution is then cooled or evaporated under controlled conditions to reach a state of supersaturation. Supersaturation occurs when the solution contains more dissolved solute than it would be able to dissolve under normal conditions. At this point, the solution is unstable, and the excess solute tends to precipitate out of the solution in the form of crystals.
3. Nucleation: Once the solution becomes supersaturated, nucleation occurs, where individual solute molecules or ions come together to form small clusters or nuclei. Nucleation can be spontaneous or induced by seeding the solution with tiny crystals of the solute or by agitation.
4. Crystal Growth: The nuclei act as sites for further crystal growth. As more solute molecules or ions are deposited onto the nuclei, the crystals grow in size. The growth of crystals occurs by the addition of solute molecules or ions from the surrounding solution onto the crystal surfaces.
5. Separation: Once the desired crystal size is achieved, the crystals are separated from the remaining solution. This can be done by filtration, centrifugation, or other solid-liquid separation techniques. The separated crystals are then washed with a solvent to remove impurities adhering to their surfaces.
6. Drying: Finally, the purified crystals are dried to remove any remaining solvent. This can be done by air drying, vacuum drying, or by heating in an oven.

ANS:B - High vapour pressure.

An undesirable property of a manometric liquid would be high vapor pressure.

Explanation:

1. Manometric Liquid:
   • A manometric liquid is a liquid used in manometers for measuring pressure differences. It needs to have certain desirable properties such as high density, non-reactivity with the fluids being measured, and stability over time.
2. Undesirable Property - High Vapor Pressure:
   • High vapor pressure in a manometric liquid can lead to evaporation and loss of the liquid from the manometer over time. This can affect the accuracy and reliability of pressure measurements.
   • Manometric liquids are typically chosen for their low vapor pressure to ensure that they remain stable and do not evaporate easily under the conditions of use.
3. Other Properties:
   • Non-sticky & non-corrosive nature: Desirable properties to prevent contamination and damage to the equipment.
   • Low viscosity & surface tension: These properties are often desirable as they allow for easy flow and accurate measurement in the manometer.
   • Low coefficient of thermal expansion: This property helps maintain stability and accuracy of pressure measurements with changes in temperature.

Conclusion:

ANS:C - Jaipur Wax Museum

The wax statue of Dr. B.R. Ambedkar was unveiled at the Jaipur Wax Museum, Nahargarh Fort, as a significant tribute on Mahaparinirvan Day, fulfilling the demand from tourists and visitors, according to Anoop Srivastava, the Founder Director of the museum.

ANS:D - Gujarat

The International Kite Festival 2023 will be held in Gujarat from January 8 to 14.

ANS:D - Bihar

The two-phased caste and economic census-2023 started in Bihar on January 7th.

ANS:C - Hanukkah

The festival referred to as the "festival of lights" celebrated globally from December 7 to December 15 is Hanukkah, commonly known as the Jewish Christmas.