A metal M forms a compound M2HPO4. The formula of the metal sulfate is:
1. M2SO4
2. MSO4
3. M(SO4
4. M2(SO4)3
Difficulty Level:
One mole of a mixture of CO and CO2 requires exactly 20g of NaOH in solution for complete conversion of all the CO2 into Na2CO3. How much NaOH would it require for conversion into Na2CO3, if the mixture (one mole) is completely oxidised to CO2?
1. 60g
2. 80g
3. 40g
4. 20g
Difficulty Level:
The oxide of metal contains 40% by mass of oxygen. The percentage of chlorine in the chloride of the metal is
1) 84.7
(2) 74.7
(3) 64.7
(4) 44.7
Difficulty Level:
What volume of measured at 1 atm and 273 K will be formed by the action of 100 mL of 0.5 N KMnO4 on hydrogen peroxide in an acid solution? The skeleton equation for the reaction is
1. 0.12 litre
2. 0.028 litre
3. 0.56 litre
4. 1.12 litre
Difficulty Level:
What is the [OH-] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2 ?
1. 0.10 M
2. 0.40 M
3. 0.0050 M
4. 0.12 M
Difficulty Level: