Question

(d) Soda Ash.
13. Which salt is normally added to ice to make it *
10. Which of the following gives carbon dioxide on
There are ten multiple choice questions. Only one of
heating?
the tas in every question is correct. Choose the
(a) Slaked Time
(b) Lime stone
correct option:
(c) Quick lime
1. Which of the following metals fails to evolve hydrogen
gas on reacting with dilute HCI?
(a) Zinc
(b) Iron
(c) Aluminium
(d) Copper
1. Which substances help in reducing acidity in stomach ?
2. On adding water on quick lime:
Give examples of two such substances
(a) a hissing sound is produced
2. An aqueous solution of sodium carbonate is basic
(b) bear is produced
How will you account for it?
(c) Both (a) and (b) are correct
3. What is the effect of heat on
(d) Nope is correct
(1) sodium hydrogen carbonate
3. When iron nails are kept in sky blue solution of copper
(ii) washing soda ?
sulphate in water, the colour of the solution changes
TO
4. Give two uses of bleaching powder.
(a) Yellow
(b) Red
5. What is the effect of blue litmus on the following solutions
(c) Pale green
(d) Colourless
(1) Aqueous Na,Co, solution
4. Hydrochloric acid can react with :
(ii) Aqueous CuSO, solution
(a) AgCI
(b) Na2CO3
(c) PbSO4
(d) Na2SO4
(iu) Aqueous NaCl solution?
5. Plaster of paris is made from:
6. Complete the following:
(a) Quick lime
(b) Slaked lime
(c) Gypsum
(d) Lime stone
(a) NaHCO3
6. Bleaching powder can be prepared by reacting
(a) caustic soda with chlorine
(b) Na2CO3 + HCI ME,
(b) washing soda with chlorine
JC) baking soda with chlorine
(c) CaSO4 2H20
(d) slaked lime with chlorine
(d) Ca(OH)2 + CO2
7. A salt can be prepared in the laboratory by reacting :
(a) metal and dilute sulphuric acid
7. Why does HCl form normal salt while H2SO4 forms
(b) metal and dilute bydrochloric acid
both normal and acid salts?
(c) metal carbonate and dilute bydrochloric acid 8. How does bleaching powder sterilise drinking water !
(d) All options are correct.
9. A substance loses all its molecules of water of
8. A solution has pH value of 5. To this, 1 mL of dilute crystallisation when exposed to air. How will you
hydrochloric acid is added. The pH of the solution be:
(a) more than 5
(b) less than 5
10. Can we weigh sodium hydroxide accurately?
(c) seven only
(d) the same only
9. The difference of the molecules of water in Gypsum
11. Identify the bases and acids from which the following
and Plastier of Paris is:
salts have been prepared :
magnesium sulphate, copper sulphate, sodium carbonate.
ammonium chloride,
12. Which out of Naci, NaHCO3 and Nano, is an acid
salt?
(c)
(
heal
name it?
32
(b) 2
(d)
freezing mixture ?​

Answer 1

Answer:

nice dp here snehit Kumar