NEET Chemistry Questions: Redox Reactions & Electrochemisty

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Oxygen conbines with which of the elementby forming chemical bond, then it possesses posi tive oxidation no. ?




Oxygen typically has a negative oxidation state, but when it combines with Fluorine (F), it can exhibit a positive oxidation state. This is because Fluorine is more electronegative than Oxygen, causing Oxygen to take on a positive oxidation state.
Which of the following element always possesses +1 oxidation state in any of its compound ?




Cesium (Cs) is an alkali metal and always possesses a +1 oxidation state in its compounds. This is because alkali metals lose one electron to achieve a stable noble gas electron configuration.
Which of the following oxidation no. does not possess by oxygen in any of its compound ?




Oxygen typically exhibits oxidation states of -2, -1, and -1/2 in various compounds. However, it does not possess an oxidation state of +1/2 in any of its compounds.
Which of the following oxidation no. does not possess by carbon in any of its compound ?




Carbon can have various oxidation states such as -4, -2, 0, and +4. However, it does not exhibit an oxidation state of +5 in any of its compounds.
Which of the following oxidation no. does not possess by nitrogen in any of its compound ?




Nitrogen can have various oxidation states, but -4 is not one of them. The common oxidation states of nitrogen include -3 (in NH3), -2, -1, 0, +1, +2, +3, +4, and +5 (in HNO3).
Which of the following oxidation no. possesses by oxygen in its compounds ?




Oxygen typically has an oxidation state of -2 in most of its compounds. However, it can also have an oxidation state of -1 in peroxides (such as H2O2). The other options provided are not common oxidation states for oxygen.
Which type of metal compounds are nomenclate according to stock notation nomenclature method ?




Stock notation is used for naming compounds of metals that have more than one possible oxidation state. For example, FeCl2 is named iron(II) chloride, and FeCl3 is named iron(III) chloride.
Molecular formula of sodium chromate (VI) is




The molecular formula of sodium chromate (VI) is $Na_2CrO_4$. Sodium chromate is an inorganic compound with the formula $Na_2CrO_4$. It is a yellow crystalline solid that is often used in industrial applications.
What is the name of $ K_2Cr_2O_7 $ according to stock notation nomenclature method ?




The name of $K_2Cr_2O_7$ according to the stock notation nomenclature method is Potassium dichromate (VI). The (VI) indicates the oxidation state of chromium, which is +6 in this compound.
What is the name of $ TiO_2$ , according to stock notation nomenclature method ?




The name of $TiO_2$ according to the stock notation nomenclature method is Titanium (IV) oxide. The (IV) indicates the oxidation state of titanium, which is +4 in this compound.
Which of the following is the true for $ Fe_3O_4 $ ?




In $ Fe_3O_4 $, iron exhibits two different oxidation states: +2 and +3. There are two Fe atoms with +3 oxidation state and one Fe atom with +2 oxidation state. This is why the ratio of atoms with oxidation states +2 and +3 in $ Fe_3O_4 $ is 1:2.
Which of the following is the wrong for $ Fe_3O_4 $ ?




The correct proportion of FeO and $ Fe_2O_3 $ in $ Fe_3O_4 $ is 1:1, not 1:2. Hence, the statement that the proportion of FeO and $ Fe_2O_3 $ is 1:2 is incorrect.
The no. of peroxy ring in $ CrO_5$ is




No explanation available.
Which of the following compound possesses peroxide $ (O_^{2–} or [–O–O–]^{2–}) $ in?




Barium peroxide (BaO2) contains the peroxide ion (O2^2-). The structure of BaO2 consists of Ba^2+ cations and O2^2- anions. This can be remembered by noting that BaO2 is commonly used as a source of peroxide in inorganic chemistry.

Which of the following compound possesses peroxide $ (O_2 ^ {1–}) $ ion ?





Barium peroxide (BaO2) contains the peroxide ion (O2^2-), not superoxide (O2^-). The confusion may arise because O2^- (superoxide) and O2^2- (peroxide) are closely related, but BaO2 specifically has the peroxide ion (O2^2-).