Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : \(ZrI_4\) is useful in purification of zirconium (Zr).
Reason : \(ZrI_4\) sublimise at room temperature.
In the light of the above statements, choose the correct answer from the options given below
Answer (c) If assertion is true but reason is false
Assertion : \(ZrI_4\) is useful in purification of zirconium (Zr). (correct)
Reason : \(ZrI_4\) sublimise at room temperature. (Not True)
The reaction that does NOT take place in a blast furnace between 900 K to 1500 K temperature range during extraction of iron is?
Consider the following statements about the oxides of halogens
A. At room temperature, OF2; is thermally stable
B. Order of stability of oxides of halogens is I > Br > Cl
C. I2O5 is used in the estimation of CO
D. ClO2; is used as a bleaching agent
The correct statements are
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –