14
MCQ (Single Correct Answer)
Dead burnt plaster is
A
$\mathrm{CaSO}_4$
B
$\mathrm{CaSO}_4 \cdot \frac{1}{2} \mathrm{H}_2 \mathrm{O}$
C
$\mathrm{CaSO}_4 \cdot \mathrm{H}_2 \mathrm{O}$
D
$\mathrm{CaSO}_4 \cdot 2 \mathrm{H}_2 \mathrm{O}$
15
MCQ (Single Correct Answer)
Suspension of slaked lime in water is known as
A
lime water
B
quick lime
C
milk of lime
D
aqueous solution of slaked lime
16
MCQ (Single Correct Answer)
Which of the following elements does not form hydride by direct heating with dihydrogen?
A
Be
B
Mg
C
Sr
D
Ba
17
MCQ (Single Correct Answer)
The formula of soda ash is
A
$\mathrm{Na}_2 \mathrm{CO}_3 \cdot 10 \mathrm{H}_2 \mathrm{O}$
B
$\mathrm{Na}_2 \mathrm{CO}_3 \cdot 2 \mathrm{H}_2 \mathrm{O}$
C
$\mathrm{Na}_2 \mathrm{CO}_3 \cdot \mathrm{H}_2 \mathrm{O}$
D
$\mathrm{Na}_2 \mathrm{CO}_3$
18
MCQ (Single Correct Answer)
A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is
A
magnesium nitrate
B
calcium nitrate
C
barium nitrate
D
strontium nitrate