Hydrogen PYQs
All NEET previous year questions from Hydrogen — with explanations.
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Methane reacts with steam at 1273 K in the presence of nickel catalyst to form:
During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following is added to prevent hydrolysis of Fe²⁺ ion?
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic. Reason R : The deep blue solution is due to the formation of amide. In the light of above statements, choose the correct answer from the options given below:
Which of the following statements are NOT correct? A. Hydrogen is used to reduce heavy metal oxides to metals. B. Heavy water is used to study reaction mechanism. C. Hydrogen is used to make saturated fats from oils. D. The H-H bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element. E. Hydrogen reduces oxides of metals that are more active than iron. Choose the most appropriate answer from the options given below :
Which of the following statement is not correct about diborane?
Match List-I with List-II: Choose the correct answer from the options given below
Given below are two statements: Statement I: The boiling points of the following hydrides of group 16 elements increase in the order: H₂O < H₂S < H₂Se < H₂Te Statement II: The boiling points of these hydrides increase with increase in molar mass. Choose the most appropriate answer.
Tritium, a radioactive isotope of hydrogen, emits which of the following particles?
Match the following and identify the correct option.
Among CaH₂, BeH₂, BaH₂, the order of ionic character is
Boric acid is an acid because its molecule:
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The alkali metals form salt-like hydrides by direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
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What is the correct relationship between the pH values of isomolar solutions of sodium oxide (), sodium sulphide (), sodium selenide () and sodium telluride ()?
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The correct order of acid strength is:
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