Nitrates of which pair of elements give different products on thermal decomposition ?

A. Na k
B. Mg ca
C. Li na
D. Li ca

Which of the following sulphates is not soluble in water ?

A. Sodium sulphate
B. Potassium sulphate
C. Zinc sulphate
D. Barium sulphate

The ore CaSO4.H2O has the general name_______________?

A. Gypsum
B. Dolomite
C. Calcite
D. Plaster of paris

Carnalite has chemical formula__________________?

A. Kci
B. Kci.mgcl2.6h2o
C. Na2b4o7.10h2o
D. Caco3.mgco3

Electrolysis of dilute solution of NaCl results at the anode_______________?

A. Sodium
B. Hydrogen
C. Chlorine
D. Oxygen

Which ion will have maximum value of heat of hydration ?

A. A1+3
B. Cs+
C. Ba+
D. Mg+2

Which one is natron ?

A. Na2co3
B. Na2co3.10h2o
C. Na2co3.h2o
D. Nahco3

NaOH is named as caustic soda because________________?

A. It corrodes the organic tissues
B. It is used in soda water
C. It reacts with chlorine gas
D. It reacts with fats to form soap

Crystals of Na2CO3. 10H2O when exposed to air_________________?

A. Lose water and remain solid
B. Gain water and remain solid
C. Gain water and become liquid
D. Remains unchanged

Which one of the following gives white precipitate with aqueous solution of BaCl2?

A. Nahco3
B. Nano3
C. Na2co3
D. Na2cro4