Comprehensive Science Notes

Which element is used as a timekeeper in atomic clocks?

Which element is involved in the control of the water content of the blood?

Which gas dissolves in water to create an acidic solution?

Which element is essential for chlorophyll formation in green plants?

In the balanced chemical equation aFe2O3(s) + bCO(g) → cFe(s) + dCO2, what are the values of the coefficients a, b, c, and d respectively?

Why is argon gas used alongside a tungsten wire in an electric bulb?

What is the correct relation between Kelvin temperature (T) and Celsius temperature (tC)?

Sound waves are least likely to travel effectively through which of the following?

What is the value of one nanometer?

Which of the following statements are correct regarding a body in equilibrium, momentum, and kinetic energy?

The functioning of safety fuses depends primarily upon which effect of electric current?

Statement I: By far the most common topographic form in a Karst terrain is the sinkhole. Statement II: Topographically, a sinkhole is a depression that varies in depth from less than a meter to few hundred metres. Based on the statements, which one of the following is correct?

Statement I: Incised meanders are formed in the mature stage of a river. Statement II: Incised meanders are characterized by rejuvenation and upliftment of land. Based on the statements, which one of the following is correct?

Statement I: Portions of glacial troughs may exhibit remarkably flat floors. Statement II: The flat floor in a glacial trough is produced by uniform glacial erosion. Based on the statements, which one of the following is correct?

Statement I: In Tundra climate, biodiversity is comparatively less. Statement II: Tundra climate has less reproductive warm period. Based on the statements, which one of the following is correct?

Statement I: Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun are the rotation of the Earth. Statement II: The Earth rotates from west to east. Based on the statements, which one of the following is correct?

Statement I: A person may suffer from tuberculosis if she/he frequently visits crowded place. Statement II: Bacteria of tuberculosis spread through droplets by sneezing or coughing. Based on the statements, which one of the following is correct?

Statement I: Bioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism. Statement II: Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond. Based on the statements, which one of the following is correct?

Which one of the following is a true fish according to the biological system of classification?

In which type of connective tissue in animals is fat stored?

Which of the following pairs about organ/part that helps in locomotion is not correctly matched?

From which cell organelles is the lysosome formed?

A protein synthesized in the endoplasmic reticulum targets the inner thylakoid space of a chloroplast. How many double-layered membranes must it cross to reach its destination?

Which of the following causes adiabatic temperature changes in the atmosphere?

Which of the following is applicable to the collision-coalescence process of precipitation?

Which location in India generally experiences the highest atmospheric pressure during winter?

Match the hypothesis/theory in List-I with the propounder in List-II: List-I: A. Planetesimal hypothesis B. Thermal contraction theory C. Geosynclinal Orogen theory D. Hypothesis of sliding continent

List-II:

1. Kober
2. Chamberlin
3. Daly
4. Jeffreys

Bright light found to emit from photographer’s flashgun is due to the presence of which noble gas?

Which of the following is NOT a characteristic of a compound?

Which of the following substances cause temporary hardness in water?

An element has 18 protons and 22 neutrons. If calcium has an atomic number of 20 and a mass number of 40, the element is an isobar of calcium. What makes it an isobar of calcium?

Which principle explains the relation 'heat lost = heat gained'?

Two copper wires have the same length, but the radius of wire 1 is half that of wire 2. The resistance of wire 1 is R. If both wires are joined in series, what is the total resistance?

Why does the Sun appear reddish when near the horizon during morning or evening?

Match the cloud type in List-I with its characteristic in List-II: List-I: A. Cirrus B. Stratus C. Nimbus D. Cumulus

List-II:

1. Rain-giving
2. Feathery appearance
3. Vertically growing
4. Horizontally spreading

Which of the following is NOT an exclusive right of coastal nations over their Exclusive Economic Zone (EEZ)?

In which group of Indian States is the Integrated Coastal Zone Management (ICZM) Project being implemented as a pilot investment?

Which of the following statements about the National Water Academy (NWA) is/are correct?

1. The primary objective of the NWA is to function as Centre of Excellence in training for in-service engineers from Central and State organizations on various aspects of water resource planning.
2. The NWA is located in New Delhi.

A copper wire of length $l$ and cross-section area A carries a current $I$ and dissipates power P. If an aluminum wire of the same dimensions carries the same current, the power dissipated will be:

The pressure of a fluid varies with depth h as $P = P_0 + \rho gh$, where $\rho$ is the fluid density. This expression is associated with: