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Andhra Pradesh SSC (Class 10) Calorimetry — practice questions

Explore 35 free Calorimetry questions in Andhra Pradesh SSC (Class 10) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Calorimetry questions and exercises with answers

Showing questions 1–30 of 35.

Onion juice loses its smell in a:Read the answer and worked solution →Plaster of Paris is chemically:Read the answer and worked solution →Acid + active metal gives:Read the answer and worked solution →Which of the following salts does not contain water of crystallisation?Read the answer and worked solution →The pH of the gastric juices released during digestion isRead the answer and worked solution →Bases turn red litmus paper:Read the answer and worked solution →NaOH + HCl → NaCl + H₂O is a:Read the answer and worked solution →Acids turn blue litmus paper:Read the answer and worked solution →Match each indicator to its colour in acidic solution.Read the answer and worked solution →Which of the following substance will not give carbon dioxide on treatment with dilute acid?Read the answer and worked solution →Phenolphthalein in a sodium hydroxide solution is:Read the answer and worked solution →A curry stain turns reddish-brown on a soap-washed cloth and yellow again on rinsing because soap is:Read the answer and worked solution →CLASS10 · Chemistry · Acid or BaseRead the answer and worked solution →The reaction between an acid and a base, producing salt and water, is called:Read the answer and worked solution →To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used isRead the answer and worked solution →Litmus, extracted from lichens, is an example of a:Read the answer and worked solution →The gas evolved when an acid reacts with a carbonate turns lime water:Read the answer and worked solution →Baking soda (NaHCO₃) is used in antacid tablets mainly because it:Read the answer and worked solution →Which one of the following can be used as an acid-base indicator by a visually impaired student?Read the answer and worked solution →CuO + 2 HCl → CuCl₂ + H₂O shows that a metallic oxide behaves like a:Read the answer and worked solution →Hydrochloric acid and acetic acid of the same concentration are compared. Which is the stronger acid?Read the answer and worked solution →Baking soda, often used to relieve acidity, is chemically:Read the answer and worked solution →Calcium phosphate is present in tooth enamel. Its nature isRead the answer and worked solution →Litmus paper turns blue when dipped in a/an:Read the answer and worked solution →Farmers add slaked lime, Ca(OH)₂, to soil that is too:Read the answer and worked solution →A solution turns red litmus blue and has pH = 11. The solution is:Read the answer and worked solution →pH less than 7 indicates a solution that is:Read the answer and worked solution →A solution with a pH less than 7 is:Read the answer and worked solution →A solution with a pH greater than 7 is:Read the answer and worked solution →Acids produce which ion when dissolved in water?Read the answer and worked solution →

Worked practice questions

Onion juice loses its smell in a:

  1. neutral solution
  2. basic solution
  3. acidic solution
  4. sugar solution
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Correct answer: B. basic solution

Onion is an olfactory indicator. Its sharp smell weakens in a basic solution (loss of smell signals base).

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Plaster of Paris is chemically:

  1. CaCO₃
  2. CaSO₄·½H₂O
  3. CaCl₂·2H₂O
  4. CaSO₄·2H₂O
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Correct answer: B. CaSO₄·½H₂O

Plaster of Paris is calcium sulfate hemihydrate, CaSO₄·½H₂O. The hemihydrate sets to gypsum (CaSO₄·2H₂O) on adding water.

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Acid + active metal gives:

  1. Salt + chlorine
  2. Salt + oxygen
  3. Salt + hydrogen gas
  4. Heat only
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Correct answer: C. Salt + hydrogen gas

When a dilute acid reacts with an active metal (a metal positioned above hydrogen in the reactivity series, such as Magnesium, Zinc, or Iron), a chemical reaction occurs where the metal displaces the hydrogen from the acid. ### General Chemical Equation $$\text{Active Metal} + \text{Dilute Acid} \rightarrow \text{Salt} + \text{Hydrogen Gas (H}_2\text{)}$$ ### Example Reaction Consider the reaction between Magnesium ($Mg$) and Hydrochloric Acid ($HCl$): $$Mg(s) + 2HCl(aq) \rightarrow MgCl_2(aq) + H_2(g) \uparrow$$ In this reaction: 1. The Magnesium ($Mg$) replaces the Hydrogen ($H$) in the acid. 2. The product $MgCl_2$ is the salt (Magnesium Chloride). 3. $H_2$ gas is released, which can be identified by a 'pop' sound when tested with a burning splinter. Therefore, the products are a salt and hydrogen gas.

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