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NEET Questions / Chemistry / General Principles And Processes Of Isolation Of Elements
The temperature inside a blast furnace is regulated by controlling the:
Amount of iron ore
Size of the furnace
Blast of hot air
Type of coke used
Which of the following is closest to the maximum temperature achieved in a blast furnace during the smelting of iron ore?
1500°C
1700°C
1950°C
2250°C
Identify the correct statement regarding the process of meiosis:
Meiosis I is an equational division.
Meiosis II is a reductional division.
Crossing over occurs during Meiosis II.
Meiosis I is a reductional division.
Which of the following statements accurately describes the outcome of meiosis?
Two diploid cells are produced.
Four diploid cells are produced.
Two haploid cells are produced.
Four haploid cells are produced.
During which stage of meiosis does crossing over occur?
Prophase II
Metaphase I
Anaphase I
Prophase I
If a diploid cell with 46 chromosomes undergoes meiosis, how many chromosomes will each daughter cell have at the end of meiosis I?
46
92
23
11.5
Which statement is FALSE regarding meiosis II?
Sister chromatids separate during anaphase II.
The chromosome number remains the same from start to finish.
Homologous chromosomes pair up during meiosis II.
Four haploid daughter cells are produced at the end of meiosis II.
Based on the Ellingham diagram, which metal is the most suitable reducing agent for alumina () at a temperature of 1000°C?
Zn
Fe
Mg
Cu
According to the Ellingham diagram, which of the following metals cannot be used to reduce alumina ()?
Mg
Ca
Cu
Na
The Ellingham diagram suggests that the reduction of alumina () by magnesium (Mg) is feasible. Which of the following statements best explains this feasibility?
The Gibbs free energy change for the overall reaction is positive.
The enthalpy change for the reaction is positive.
The entropy change for the reaction is negative.
The Gibbs free energy change for the overall reaction is negative.
