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- 1. Multiple Choice
1. Which of the following acid is present in sour milk?
Lactic acid
tartaric acid
glycolic acid
citrus acid
- 2. Multiple Choice
When CO2 is passed through lime water, it turns milky. the milkiness in due to formation of
H2 O
CaCO3
CaO
CO2
- 3. Multiple Choice
Incorrect statement about acids is/are
they have bitter taste
they changes the colour or red litmus to blue
they changes the colour or blue litmus to red
all above
- 4. Multiple Choice
When aqueous sodium carbonate (Na2CO3) with HCl(aq), it gives
(a) NaOH, H2 (g) and CO2(g)
(b) NaCl, H2 O and CO2(g)
(c) NaHCO3, H2 (g) and CO2(g)
(d) NaHCO3, H2 O and CO2(g)
- 5. Multiple Choice
Chemical formula of baking soda is-
NaHCO3
NaCO3
MgSO4
MgCO3
- 6. Multiple Choice
Antacids contain
weak base
Strong base
Strong acid
weak acid
- 7. Multiple Choice
Bleaching powder is soluble in cold water giving a milky solution due to-
(a) available chlorine
(b) lime present in it
(c) calcium carbonate formation
(d) The absorption of carbon dioxide from atmosphere
- 8. Multiple Choice
Plaster of Paris hardens by-
(a) giving of CO2
(b) changing into CaCO3
(c) combining with water
(d) giving out water
- 9. Multiple Choice
If Copper sulphate pentahydrate is heated then,
crystal shape chnages
It becomes white
it becomes blue
none
- 10. Multiple Choice
1. Three acidic solutions A, B and C have pH = 0, 3 and 5 respectively. Which solution has the highest concentration of H+ ions?
A
B
C
don't know
- 11. Multiple Choice
Dry HCl gas dhanges the colour of dry blue litmus
dry blue litmus
dry red litmus
both
none
- 12. Multiple Choice
NH3 + H2O + CO2 + NaCl gives
NaHCO3 + NH4Cl
NaHCO3
NH4Cl
NaHCO3 + NH4Cl+ H2O
- 13. Multiple Choice
NaHCO3 on heating gives
Na2CO3 + CO2 + H2O
Na2CO3 + CO2
Na2CO3 + H2O
Na2CO3
- 14. Multiple Choice
Sodium hydrogen carbonate is used in fire extinguisher.
True
false
- 15. Multiple Choice
Plaster of Paris is obtained by heating gypsum at 3730C
True
False
- 16. Multiple Choice
When NaOH and HCl are mixed in equal molar quantities, the result is
(a) the formation of salt +H2O
(b) the formation of salt +H2(g)
(c) the formation of salt +O2(g)
(d) All above are correct
- 17. Multiple Choice
A student detected the pH of four unknown solutions A, B, C and D as follows: 11, 5, 7 and 2. Predict the nature of these solutions. Which one is neutral solution
A
B
C
D
- 18. Multiple Choice
Plaster of pairs is made from-
(a) lime stone
(b) slaked lime
(c) quick lime
(d) gypsum
- 19. Multiple Choice
Bleaching powder gives smell of chlorine because it-
(a) is unstable
(b) gives chlorine on exposure to atmosphere
(c) is a mixture of chlorine and slaked lime
(d) contains excess of chlorine
- 20. Multiple Choice
The reaction of metal with acid results in the formation of-
(a) only hydrogen gas
(b) only salt
(c) both salt and hydrogen gas
(d) none of these
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