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Which one of the following carbonate is water insoluble ?
A. Na2CO3 B. K2CO3 C. (NH4)2CO3 D. CaCO3 Submitted by :- Jamil Ahmed
Which one of the following substances conducts electricity by the movement of ions ?
A. Graphite B. Copper C. Molten sodium chloride D. Mercury Submitted by :- Jamil Ahmed
The ore CaSO4.H2O has the general name_______________?
A. Gypsum B. Dolomite C. Calcite D. Plaster of Paris Submitted by :- Jamil Ahmed
Which of the following sulphates is not soluble in water ?
A. Sodium sulphate B. Potassium sulphate C. Zinc sulphate D. Barium sulphate Submitted by :- Jamil Ahmed
Which element is necessary for normal leaf development ?
A. Si B. Ba C. Mg D. Ca Submitted by :- Jamil Ahmed
The word Alkali means__________________?
A. Base B. Basic salt C. Ashes D. Spirit Submitted by :- Jamil Ahmed
Which one is least ionic in nature and decompose on heating ?
A. LiOH B. NaOH C. KOH D. CsOH Submitted by :- Jamil Ahmed
How many electrons are there in benzene to form delocalized electron cloud________________?
A. 3 B. 4 C. 6 D. 8 Submitted by :- Jamil Ahmed
Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?
A. Two B. Three C. Four D. Five Submitted by :- Jamil Ahmed
Addition of 2% gypsum in cement________________?
A. Triggers hydration B. Triggers hydrolysis C. Prevents rapid hardening D. all of the above Submitted by :- Jamil Ahmed