Index
TestingImage

IMPORTANT QUESTIONS

  1. Q351 Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride
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  2. Q352 Complete the missing components/ variables given as x and y in following reacations. (1) Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(x) + 2KNO₃(y) (2) Cu(s) + 2AgNO₃(aq) → Cu(NO₃)₂(aq)+ x(s) (3)H₂SO₄(aq) + Zn(s) → H₂(y) + ZnSO₄(x) (4) CaCO₃(s) →x CaO(s) + CO₂(g)
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  3. Q353 Identify the reducing agent in the following reactions (a) 4NH₃+ 50₂ → 4NO + 6H₂O (b) H₂O + F₂ → HF + HOF (c) Fe₂O₃ + 3CO → 2Fe+ 3CO₂(d) 2H₂ + O₂ → 2H₂O
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  4. Q354 What is baking soda? How is it obtained from sodium chloride? Mention any two uses of it.
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  5. Q355 A solution reacts with crushed egg-shells to give a gas that turns lime water milky. Say, whether the solution contains an acid or a base.
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  6. Q356 Balance the following chemical equations including the physical states. a) C&HizOs C₂H-OH + CO₂ b) Fe+0: Fe:0₁ c) NH+ Cl → NHNHicl d) Na +H:O — NaOH +H;
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  7. Q357 What is Opioids? Write the name of any one opioids.
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  8. Q358 What are the facts that appear from the reaction of sodium hydroxide and ammonium sulphate?
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  9. Q359 Write the names of oxidised and reduced substances in the following reactions: 4Na + 0₂→ 2Na₂O
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  10. Q360 Which of the following is not a part of the female reproductive system in uman beings?
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