Chemistry, asked by jacinthsamuel230860, 6 months ago

7.What are alkalies ? Give two examples.
8.Write balanced equations for the reaction of a)Aluminium when heated in air. b)Calcium with water.
9. a)Hydrogen gas is not evolved when a metal reacts with nitric acid. Why? b )Name two metals which react with very dil.HNO3 to evolve H2.

Answers

Answered by nikhilsram2004
2

Answer:

Alkali salts are soluble hydroxides of alkali metals and alkaline earth metals, of which common examples are: Sodium hydroxide (NaOH) – often called "caustic soda" Potassium hydroxide (KOH) –

a. 4Al+3o2-------->2Al2O3

b. Ca +2 H₂O → Ca(OH)₂ + H₂.

9.because it is a strong oxidizing agent it Oxidises H2 into water and itself get reduced

b. manganese and magnisium

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