Practice Test 7
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Dead burn plaster is

Colemanite is

  • Solution

    Colemanite is a mineral of boron having composition as Ca2B6O11.5H2O

The chemical which is used for plastering the broken bones is

  • Solution

    (CaSO4)2.H2O – Plaster of par is is used for plastering the broken bones.

Which of the following compounds of cement sets at the slowest rate ?

  • Solution

    Dicalcium silicate 2CaO.SiO2 contains more SiO2 as compared to tricalcium silicate 3CaO.SiO2. Therefore, it has slow setting rate.

Plaster of Paris on making paste with little water sets to hard mass due to formation of

  • Solution

Gypsum on heating at 120 – 130°C gives :

  • Solution

Plaster of Paris is :

  • Solution

    Chemically plaster of Paris is CaSO4 .1/2H2O

Which one of the following is flourspar?

In India at the occasion of marriages, the fire works used give green flame. Which one of the following radicals maybe present?

In Solvay ammonia process, sodium bicarbonate is precipitate due to

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