1 |
Which one is not use of lime |
Extraction of metals
Ceramic industry
Preparation of bleaching powder
Preparation of gypsum
|
2 |
When water is added to plaster of paris, it changes to a hard mass. Its volume also expands upto |
1%
2%
3%
5%
|
3 |
Sulphur is essential constituent for plants. Which is not role of sulphur |
Chlorophyll development
Development of root system
Constituents of some proteins
Increase transpiration force
|
4 |
Which of the following compounds is used to make spray, which has fungicidal action. |
BaSO4
Na2CO3
CaO
CaSO4.2H2O
|
5 |
Which substance is used to lower the melting point of NaCl in Down's cell |
CaCO3
CaCl2
MgSO4
AlCl3
|
6 |
In Down's cell anode is made up of. |
Iron
Copper
Graphite
Platinum
|
7 |
Sodium is collected over molten sodium chloride in Down's cell, because. |
It does not react with NaCl
It is lighter in weight and floats on molten NaCl
Its reactivity is greater than NaCl
None of these
|
8 |
Which is insoluble in water. |
BeSO4
MgSO4
CaSO4
BaSO4
|
9 |
Which is called milk of magnesia. |
MgCO3
Mg(OH)2
MgSO4
MgCl2
|
10 |
Which oxide is amphoteric in nature. |
BeO
MgO
CaO
BaO
|
11 |
Which on eof the following alkaline earth metal form peroxide when heated with oxygen at 600 oC |
Magnesium
Calcium
Strontium
Barium
|
12 |
Which one of the following elements has the same oxidation number in all its known compounds. |
Beryllium
Nitrogen
Sulphur
Chorine
|
13 |
Setting of Plaster of Paris is accompanied with |
Hydrogen bonding
Hydration
Dehydration
None of these
|
14 |
Which element reacts with alkali and H2 gas is produced. |
Be
Mg
Ca
Sr
|
15 |
Oxides of alkaline earth metal are |
Acidic
Basic
Neutral
Amphoteric
|
16 |
Oxide of Alkaline earth metal are |
Acid
Basic
Neutral
Amphoteric
|
17 |
When carbon di oxide is bubbled through lime water, white precipitate is formed This precipitate is. |
COCl2
H2CO3
CaO
CaCO3
|