In the reaction to NH₃ + H₂O \(\longrightarrow \) \({ NH }_{ 4 }^{ + }+O\overline { H } \), NH₃ is acidic in. the reason for its acidic is_____ 

One 'U' stands for the mass of ______________.

Unit of Avogadro's number is _______________.

The volume occupied by any gas at S.T.P. is_____ 

12 g of carbon-12 contains_____carbon atoms

Which form of based on physical characteristics possess neither definite volume nor definite shape?

The characteristic feature of orderly arrangement of molecules belongs to ______________.

Consider the following statements
i) Matter possesses mass.
ii) 22-carat gold is a mixture.
iii) Dry ice is a compound.
Which of the following statement(s) given above is/ are correct?

Maximum oxidation state is present in the central metal atom of which compound

Which of the following compound(s) has /have a percentage of carbon same as that in ethylene (C₂H₄)?

Two 22.4 litre containers A and B contains 8 g of O₂ and 8 g of SO₂ respectively at 273 K and 1 atm pressure, then ______.

Identify the correct statement(s) with respect to the following reaction :
Zn + 2HCl \(\longrightarrow\) ZnCl₂ + H₂
(i) Zinc is acting as an oxidant
(ii) Chlorine is acting as a reductant
(iii) Hydrogen is not acting as an oxidant
(iv) Zn is acting as a reductant

Consider the following statements :
(i) Oxidation number of He = zero
(ii) Increase in oxidation number results in reduction.
(iii) The substance undergoing the increase in oxidation number is reducing agent.
Which among the above statement(s) is/are correct?

Total number of electrons present in 1.7 g of ammonia is _____.

Which one of the following represents 180 g of water ?

Fe2 + \(\longrightarrow\) Fe³⁺ + e^- is a ________ reaction.

The number of water molecules in a drop of water weighing 0.018 g is ________.

Carbon forms two oxides, namely carbon monoxide and carbon dioxide. The equivalent mass of which element remains constant ?

An element X has the following isotopic Composition ²⁰⁰X = 90%, ¹⁹⁹X = 8% and ²⁰²X = 2%. The Weighted average atomic mass of the element X is closest to _________.

Assertion: The atomic masses of most of the elements. are fractions. 
Reason:  The atomic mass represents the ratio of the average mass of the atom to one avogram.
Codes:
(a) Both assertion and reason are correct and the reason is the correct explanation for assertion
(b) Both assertion and reason are correct but the reason is not the correct explanation for an assertion
(c) Assertion is true but reason is false
(d) Both assertion and reason is false