Some Important Compounds of Calcium
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CHXI10:THE S-BLOCK ELEMENTS

315950 Portland cement does not contain

1 \(\mathrm{CaSiO}_{4}\)
2 \(\mathrm{Ca}_{2} \mathrm{SiO}_{5}\)
3 \(\mathrm{Ca}_{2} \mathrm{Al}_{2} \mathrm{O}_{6}\)
4 \(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

315951 Mixture of \(\mathrm{MgCl}_{2}\) and \(\mathrm{MgO}\) is called

1 Portland cement
2 Sorel's cement
3 Double salt
4 None
CHXI10:THE S-BLOCK ELEMENTS

315952 The presence of sand in mortar is to

1 Prevent cracks and increase hardness
2 Decrease hardness
3 Decrease porous nature
4 All the above
CHXI10:THE S-BLOCK ELEMENTS

315953 In curing cement plasters water is sprinkled from time to time. This helps in

1 developing interlocking needle-like crystals of hydrated silicates.
2 hydrating sand and gravel mixed with cement.
3 converting sand into silicic acid.
4 keeping it cool.
CHXI10:THE S-BLOCK ELEMENTS

315954 The setting of cement under water is essentially a/an:

1 Oxidation process
2 Reduction process
3 Double decomposition process
4 Hydration process
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CHXI10:THE S-BLOCK ELEMENTS

315950 Portland cement does not contain

1 \(\mathrm{CaSiO}_{4}\)
2 \(\mathrm{Ca}_{2} \mathrm{SiO}_{5}\)
3 \(\mathrm{Ca}_{2} \mathrm{Al}_{2} \mathrm{O}_{6}\)
4 \(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

315951 Mixture of \(\mathrm{MgCl}_{2}\) and \(\mathrm{MgO}\) is called

1 Portland cement
2 Sorel's cement
3 Double salt
4 None
CHXI10:THE S-BLOCK ELEMENTS

315952 The presence of sand in mortar is to

1 Prevent cracks and increase hardness
2 Decrease hardness
3 Decrease porous nature
4 All the above
CHXI10:THE S-BLOCK ELEMENTS

315953 In curing cement plasters water is sprinkled from time to time. This helps in

1 developing interlocking needle-like crystals of hydrated silicates.
2 hydrating sand and gravel mixed with cement.
3 converting sand into silicic acid.
4 keeping it cool.
CHXI10:THE S-BLOCK ELEMENTS

315954 The setting of cement under water is essentially a/an:

1 Oxidation process
2 Reduction process
3 Double decomposition process
4 Hydration process
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CHXI10:THE S-BLOCK ELEMENTS

315950 Portland cement does not contain

1 \(\mathrm{CaSiO}_{4}\)
2 \(\mathrm{Ca}_{2} \mathrm{SiO}_{5}\)
3 \(\mathrm{Ca}_{2} \mathrm{Al}_{2} \mathrm{O}_{6}\)
4 \(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

315951 Mixture of \(\mathrm{MgCl}_{2}\) and \(\mathrm{MgO}\) is called

1 Portland cement
2 Sorel's cement
3 Double salt
4 None
CHXI10:THE S-BLOCK ELEMENTS

315952 The presence of sand in mortar is to

1 Prevent cracks and increase hardness
2 Decrease hardness
3 Decrease porous nature
4 All the above
CHXI10:THE S-BLOCK ELEMENTS

315953 In curing cement plasters water is sprinkled from time to time. This helps in

1 developing interlocking needle-like crystals of hydrated silicates.
2 hydrating sand and gravel mixed with cement.
3 converting sand into silicic acid.
4 keeping it cool.
CHXI10:THE S-BLOCK ELEMENTS

315954 The setting of cement under water is essentially a/an:

1 Oxidation process
2 Reduction process
3 Double decomposition process
4 Hydration process
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CHXI10:THE S-BLOCK ELEMENTS

315950 Portland cement does not contain

1 \(\mathrm{CaSiO}_{4}\)
2 \(\mathrm{Ca}_{2} \mathrm{SiO}_{5}\)
3 \(\mathrm{Ca}_{2} \mathrm{Al}_{2} \mathrm{O}_{6}\)
4 \(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

315951 Mixture of \(\mathrm{MgCl}_{2}\) and \(\mathrm{MgO}\) is called

1 Portland cement
2 Sorel's cement
3 Double salt
4 None
CHXI10:THE S-BLOCK ELEMENTS

315952 The presence of sand in mortar is to

1 Prevent cracks and increase hardness
2 Decrease hardness
3 Decrease porous nature
4 All the above
CHXI10:THE S-BLOCK ELEMENTS

315953 In curing cement plasters water is sprinkled from time to time. This helps in

1 developing interlocking needle-like crystals of hydrated silicates.
2 hydrating sand and gravel mixed with cement.
3 converting sand into silicic acid.
4 keeping it cool.
CHXI10:THE S-BLOCK ELEMENTS

315954 The setting of cement under water is essentially a/an:

1 Oxidation process
2 Reduction process
3 Double decomposition process
4 Hydration process
Join With Us for More Updates
CHXI10:THE S-BLOCK ELEMENTS

315950 Portland cement does not contain

1 \(\mathrm{CaSiO}_{4}\)
2 \(\mathrm{Ca}_{2} \mathrm{SiO}_{5}\)
3 \(\mathrm{Ca}_{2} \mathrm{Al}_{2} \mathrm{O}_{6}\)
4 \(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

315951 Mixture of \(\mathrm{MgCl}_{2}\) and \(\mathrm{MgO}\) is called

1 Portland cement
2 Sorel's cement
3 Double salt
4 None
CHXI10:THE S-BLOCK ELEMENTS

315952 The presence of sand in mortar is to

1 Prevent cracks and increase hardness
2 Decrease hardness
3 Decrease porous nature
4 All the above
CHXI10:THE S-BLOCK ELEMENTS

315953 In curing cement plasters water is sprinkled from time to time. This helps in

1 developing interlocking needle-like crystals of hydrated silicates.
2 hydrating sand and gravel mixed with cement.
3 converting sand into silicic acid.
4 keeping it cool.
CHXI10:THE S-BLOCK ELEMENTS

315954 The setting of cement under water is essentially a/an:

1 Oxidation process
2 Reduction process
3 Double decomposition process
4 Hydration process