Question

(a) The most commonly used natural indicator is____ and is extracted from______________________________
(b) Aqueous solution of baking soda is bitter in taste and feels soapy on touching because it contains______________________________
(c) __________________are used to test whether a substance is acidic or basic in nature.
(d) ____________________change their colour when added to a solution containing an acidic or basic substance.
(e) Lemon juice, orange juice taste sour because they contain_______________________
(f) The solutions which do not change the colour of either blue or red litmus are called ____________________solutions.
(h) In neutralization reaction heat is always___________________________________.
(i) Salts may be____________________________ or _____________________in nature.
(j) Chemically milk of magnesia is_____________ _ and baking soda is_______________
(k) China rose indicator turns__________________________ solution to dark pink and ______________________ solution to green

Q2-Match the following.
Column I Column II
a) An antacid i) Formic acid
b) An Ant ii) Milk of magnesia
c) China Rose iii) Turns red litmus blue
d) An acid iv) A natural indicator
e) A base v) Turns blue litmus red.
Q3- Multiple choice question-
i) Sodium bicarbonate is commonly called
(a) Lime water
(b) Slaked lime
(c) Washing soda
(d) Baking soda

(ii)Which of the following statements is correct?
(a) Indicator is a substance that shows different colors in acidic and basic solution.
(b) Turmeric stain on a white shut turns to red when it is washed with soap.
(c) Lime water is a solution of calcium hydroxide.
(d) All the above are correct.


(iii) Neutralisation reaction is a
(a) physical and reversible change.
(b) physical change that cannot be reversed.
(c) chemical and reversible change.
(d) chemical change that cannot be reversed

(iv)Which of the following is an acid-base indicator?
(a) Vinegar
(b) Lime water
(c) Turmeric
(d) Baking soda

(v)'Litmus', a natural dye is an extract of which of the following?
(a) China rose (Gudhal)
(b) Beetroot
(c) Lichen
(d) Blue berries (Jamun)

(vi)Which medicines are used for treating indigestion?
(a) Antibiotic
(b) Analgesic
(c) Antacids
(d) Antiseptic
Q4- Give a reason-
(a) Great care should be taken while handling laboratory acids and bases.
(b) Solid powder of baking soda does not turn dry litmus paper to blue in colour
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Answer 1

Answer:

thats a whole paper omg are u cheating in exam lol

Answer 2

Answer:

Yeah You are cheating on a worksheet.

Explanation: