Download App

Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts5 Marks
Question
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
  1. What will be the action of solution A on litmus?
  2. What will be action of solution B on litmus?
  3. Name any two substances which can give solutions like A.
  4. Name any two substances which can give solutions like B.
  5. What sort of reaction takes place when solution A reacts with solution B?
✓

Answer

  1. Solution A turns universal indicator blue to purple so it is basic in nature and will turn litmus blue.
  2. Solution B turns universal indicator orange to red so it is acidic in nature and will turn litmus red.
  3. Milk of magnesia and sodium hydroxide solution are bases like solution A.
  4. Lemon juice and hydrochloric acid are acids like solution B.
  5. Neutralisation reaction.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the questions.[Che-5M]" from Acids, Bases and Salts→Acids, Bases and Salts — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

  1. Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
  2. Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
  3. Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
→
Give the steps involved in the extraction of metals of low and medium reactivity from their respective sulphide ores.
→
An organic compound A with molecular form C4H8O2 on alkaline hydrolysis gives two compound B and C. C on acidification with dil. HCl gives D. Oxidation of B with K2Cr2O7/ H2SO4 also gives D. Identify A, B, C and D and explain all the reactions involved.
→
When a mixture of gases X and Y is compressed to 300atm pressure and then passed over a catalyst consisting of a mixture of zinc oxide and chromium oxide (heated to a temperature of 300°C), then an organic compounds Z having the molecular formula CH4O is formed. X is a highly poisonous gas which is formed in appreciable amounts when a fuel burns in a limited supply of air; Y is a gas which can be made by the action of a dilute acid on an active metal; and Z is a liquid organic compound which can react with sodium metal to produce hydrogen gas:
  1. What are X, Y and Z?
  2. Write a balanced chemical equation of the reaction which takes place when X and Y combine to form Z. Indicate the conditions under which the reaction occurs.
→
Explain the cleansing action of soap. Draw diagrams to illustrate your answer.
→
What are the merits of the modern periodic table of elements?
→
Explain the cleansing action of soap. Draw diagrams to illustrate your answer.
→
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
  1. Name the metal and write its chemical symbol.
  2. Write the name and formula of the sulphide ore.
  3. Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
  4. Name a common device in which this metal is used.
  5. Can this metal displace copper from copper sulphate solution? Why?
→
Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond.
→
An organic compound A having the molecular formula C3H8O is a liquid at room temperature. The organic liquid A reacts with sodium metal to evolve a gas which burns causing a little explosion. When the organic liquid A heated with concentrated sulphuric acid at 170°C, it forms a compound B which decolourizes bromine water. The compound B adds on one molecule of hydrogen in the presence of Ni as catalyst to forms compound C which gives substitution reactions with chlorine.
  1. What is compound A?
  2. What is compound B?
  3. What type of reaction occurs when A is converted into B?
  4. What is compound C?
  5. What type of reaction takes place when B is converted into C?
→