Natural water include the following except ______.
Which of the following methods cannot be used to remove permanent hardness from water?
If the solubility or sodium tetraoxosulphate (IV) at 30°c is 18g per 100g How much is this gram per kilogram?
The following are example of colloid except ____.
The pH of the solution M, N, O, and P are 4, 6, 8 and 10 respectively. Therefore
1 out of 4
Sodium chloride may be obtained from brine by _____.
Oil spillage in pond and creek can be cleared by _____.
Which of the following is a chemical compound?
Crystallization is a separation method used ____.
Which hydroxide dissolves in water to form an alkaline
2 out of 4
A mixture contains 20cm3 of hydrogen, 35cm3 of oxygen, 15cm3 of carbon dioxide and 10cm3 of nitrogen at S.T.P which of the following gives the mole fraction of hydrogen in this mixture?
0.07g of a hydride of carbon occupies 56 at S.T.P when vaporized and contains 14.29% by mass of hydrogen. The formula of the hydrocarbon is
The pressure on 100cm3 of oxygen gas at 35°c is 750mm of Hg. What would be the volume of the gas if the pressure is increased to 1000mm of Hg without changing the temperature?
Which of the following bonds exist in crystalline ammonium chloride (NH4Cl)?
Which of the following is a neutralization reaction? Addition of ____.
3 out of 4
In the preparation of carbon monoxide by heating ethanoic acid with concentrated sulphuric acid, the concentrated sulphuric acid acts as ____.
How many grams of methyl acetylene (propane) CH3-C=CH will completely discharge the colour of 8g of bromine? (Br = 80, C = 12, H = 1)
Brass is an alloy containing copper and _____.
60cm³ of hydrogen are sparked with 20cm³ of oxygen at 100˚c and 1 atmosphere. The total volume of the residual gases is ____.
If the rate of diffusion of oxygen gas is taken as 1, what will be the rate of diffusion of methane whose relative molar mass is 16?
4 out of 4