The order of reactivity of four elements is J>M>Q>T i.e. J is the most reactive and T the leastreactive. A series of reactions are given below: Which three reactions could…

Which one of the following movements will be severely and immediately disrupted if the oxygenconcentration in the blood becomes very low? Answer: 13) B The key to solve this question…

The symbol ⟐ defines a mathematical binary operation such that y ⟐ x =x y^xfor all positive integers.What is the value of (2 ⟐ 3) ⟐ 2? Answer: 12) C…

It is known that a radioactive source emits a single type of radiation. Detectors are placed in the two positions shown. The graph shows how the readings change over time.…

2.00g of a carbon compound is burnt in excess oxygen.4.77g of carbon dioxide is produced.What percentage (to the nearest 1%) of carbon is in the original compound? A 21%B 26%C…

The data below considers the risk of having a cancer in the neck region due to drinking alcoholand one genetic factor (presence of a mutant allele for the CYP1A1 gene).…

Which of the following is a correct unit of potential difference (voltage)?A amp per ohmB coulomb per jouleC joule per secondD newton per coulombE watt per amp Answer: 7) E…

Which one of the following covalent substances could exist as a giant structure? A SiCl4B SiO2C IClD Cl2OE H2SF CF4 Answer: 6) B Out of all the options, SiO₂ is the only…