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Which of the following scientists discovered the electrons?
A coordinate covalent bond could be formed between?
Electrovalent compounds normally ------------
Which of the following statements about elements in Group VII is correct?
Which of the following pairs of molecules form hydrogen bonds?
The isotopes of neon are represented by the symbols \(^{20}\)\(_{x}\) Ne, \(^{21}\) \(_{y}\) Ne, and \(^{22}\) \(_{z}\) Ne. The relationship between x, y, and z is?
How many molecules of oxygen would occupy a volume of 2.24 cm\(^{3}\) at s.t.p?
[Molar volume at s.t.p = 22,400 cm\(^{3}\), Avogadro's number = 6.02 x 10\(^{23}\)]
The energy profile diagram illustrates-------------
The enthalpy change of the reaction is------------
The activation energy of the reaction is
Protons and electrons are called fundamental particles because they----------
The region around the nucleus where electrons can be located is called?
The following ions have the same electron configuration except
\(_{8}\)O, \(_{12}\)Mg, \(_{13}\)AI, \(_{17}\)CI
An element, Q, contains 69% of\(^{63}\)Q and 31% of \(^{65}\)Q. What is the relative atomic mass of Q?
Potassium trioxonitrate (V) can be obtained from its solution by----------
Which of the following statements is correct about ionization energy? It
Which of the following species has the largest ionic radius
What is the empirical formula of a hydrocarbon containing 0.160 moles of carbon and 0.640 moles of hydrogen
What is the concentration of a solution which contains 0.28g of potassium hydroxide in 100 cm\(^{3}\) of solution [KOH = 56]
Student X titrated 25 cm\(^{3}\) of Na\(_{2}\)CO\(^{3}\) with 0.1 mol dm\(^{-3}\) HCI, using methyl orange as indicator. Student Y carried out the same exercise but used phenolphthalein as an indicator. Which of the following statements about the titration is true?