Fill in the blanks in the following sentences.
(a) Lemon juice and vinegar taste _____ because they contain _____.
(b) Turmeric and litmus are _____ acid-base indicators.
(c) Phenolphthalein gives _____ colour with lime water.
(d) When an acidic solution is mixed with a basic solution, they _____ each other forming _____ and water.

Tutorialspoint

Simply Easy Learning

---

Updated on 01-Feb-2023 11:07:12

0 Views

Print Article

• Related Articles
• The indicators which turns red in acid solution are:(a) Turmeric and litmus(b) Phenolphthalein and methyl orange(c) Litmus and methyl orange(d) Phenolphthalein and litmus
• Will lemon and turmeric change colours when they are mix together because lemon is acid and turmeric is an indicator?
• Fill in the blanks in the following sentences :(a) Acids have a _______ taste and they turn _______ litmus to _______. (b) Substances do not show their acidic properties without _______. (c) Acids produce _______ ions on dissolving in water. (d) Those substances whose smell (or odour) changes in acidic or basic solutions are called _______ indicators. (e) Onion and vanilla extract are _______ indicators.
• When metals react with water, they are acidic or basic?
• Answer the following questions:-1. Turmeric is(a) an acid (b) a base (c) salt (d) an indicator2. What are indicators? Name two olfactory indicators.3. Name two other natural indicators. How do they behave with acids and bases?
• The indicator which produces a pink colour in an alkaline solution:(a) Methyl orange(b) Turmeric paper(c) Phenolphthalein(d) Litmus paper
• Fill in the crossword given as figure with the help of the clues provided.(2) The solution which does not change the colour of either red or blue litmus.(4) Phenolphthalein gives pink colour in this type of solution.(7) Colour of blue litmus in lemon juice. Down(1) It is used to test whether a substance is acidic or basic.(3) It is a natural indicator and gives pink colour in basic solution.(5) Nature of ant’s sting.(6) It is responsible for increase in temperature during a neutralisation reaction"
• When a student added red litmus to an aqueous solution, the red litmus turned blue. Which one of the following should be added in excess so that the change in colour is reversed?(1) baking soda solution (2) lime water (3) vinegar solution (4) ammonia solution
• You have been provided with three test tubes. one of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
• Which one of the following would you need to identify the gas that evolve when you heat NaOH solution with zinc metal?(a) Red litmus solution(b) Blue litmus solution(c) A burning splinter/matchstick(d) Lime water
• (a) What is an indicator? Name three common indicators.(b) Name the acid-base indicator extracted from lichen. (c) What colour does the turmeric paper turn when put in an alkaline solution?
• Fill in the following blanks with suitable words:(a) Chemical equations are balanced to satisfy the law of _____. (b) A solution made in water is known as an ____ solution and indicated by the symbol ____.
• Consider the following statements:(a) Both acids and bases change colour of all indicators.(b) If an indicator gives a colour change with an acid, it does not give a change with a base.(c) If an indicator changes colour with a base, it does not change colour with an acid.(d) Change of colour in an acid and a base depends on the type of the indicator.Which of these statements are correct? (i) All four (ii) (a) and (d)(iii) (b) and (c)(iv) only (d)
• State whether the following statements are true or false. Correct the false statements.(a) All substances are either acidic or basic.(b) A compound if acidic will turn all indicators red.(c) Lime water turns red limus blue.(d) Common salt dissolved in water turns blue litmus red.(e) Phenolphthalein is a natural indicator.(f) Calamine can be used to treat ant’s sting.(g) Lemon water is basic in nature.
• 1. When metals react with bases they're acidic or basic?2. When metals react with acid they're acidic or basic?