When sulphur is heated with NaOH (aq)? The compounds formed are
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Solution
4S+6NaOH→Na2S2O3+2Na2S+3H2O
A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dil H2SO4, but gives no precipitate with NaCl. The metal salt solution will consist of
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Solution
BaCO3 forms a yellow ppt of barium chromate. BaCO3 forms a white precipitate of BaSO4. BaCl2 is soluble in water.
Which of the following has density greater than water?
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Solution
Li, Na, K are lighter than water but Rb is heavier than water.
An inorganic compound which on heating first melts, then solidifies and liberates O3 gas, the inorganic compound is
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Solution
Which is most basic in character ?
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Solution
Since the ionization energies of alkali metals decrease down the group, the ionic character and consequently basic property of their hydroxides increases in the same order,i.e. from LiOH to CsOH.
Which property of sodium is being used in street lights ?
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Solution
The property of sodium atom to emit photons in yellow region of visible spectrum, due to electrically stimulated electron transitions is used in street lights.
Which of the following statements is incorrect?
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Solution
During the dissolution of alkali metal hydrides energy is released in large amount, i.e., it is exothermic in nature.
Which of the following does not illustrate the anomalous properties of lithium?
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Solution
Li is much softer than the other group I metals. Actually Li is harder then other alkalimetals
Which one of the alkaline earth metals shows some anomalous behaviour and has same electronegativity as aluminium?
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Solution
Be shows diagonal relationship with Al
When potassium dichromate crystals are heated with conc.HCl