NTPC CBT-2 Chemistry Quiz - 29

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Question 1:

Bleeding is stopped by the application of ferric chloride .This is because

The blood start flowing in the opposite direction

The blood is coagulated and the blood vessels are sealed

Ferric chloride seals the blood vessels

The blood reacts and a solid is formed

Which of the following statement is incorrect about cement?

Raw materials used for the manufacture of clay are limestone and clay.

Excess of silica decrease the setting time of cement.

Alumina decreases the setting time of cement.

Clay provides silica oxide , alumina oxide and ferric oxide.

Which of the following is an ionic compound?

$\mathrm{NaCl}$

$\mathrm{CH}$

$\mathrm{HF}$

$\mathrm{H}_{2} \mathrm{O}$

Which of the following is the most important constituent of glass ?

Silica

Lime water

sulphur trioxide

None of these

Which of the following is popularly called Hypo?

Silver Bromide

Silver nitrate

Sodium thiosulphate

Sodium phosphate