Question
When copper sulphate solution reacts with iron metal,
copper metal is formed. Which of the following reactions is this?Solution
A displacement reaction is a type of reaction in which part of one reactant is replaced by another reactant. • Single displacement reaction: These are the reactions in which one reactant replaces part of the other. • For example: Fe + CuSO4 → FeSO4 + Cu. • Double displacement reaction: These are the reactions in which the cations and anions in the reactants switch partners to form products. • For example: AgNO3 + NaCl → AgCl + NaNO3
570.11 ÷ 18.98 × 5.14 – 123.9 = √?Â
23.98% of 624.99 = 19.98% of ? + 14.98% of 639.99
(√8648 ×7) ÷ (3.9 ×5.99) = ?
102.89 of 3.08 = 59.98% of 499.94 + √?
92% of 1650 + 32² = ? + 1504 ÷ 16
159.98% of 4820 + 90.33% of 2840 = ? + 114.99% of 1980
486, 162, 51, 18, 6, 2
(124.99)² = ?
7/12 of 539.98 – 23.98 × 9.03 + 77.89 = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
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