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Silicon dioxide is an acidic oxide. It will react with strong bases to form silicate salts, Si\(O_2\) is acidic oxide because Si is non-metal. Oxides of non-metals are acidic in nature.

Normal salts are formed when all the replaceable hydrogen ions in the acid have been completely replaced by metallic ions. Trioxonitrate(V) acid, HNO\(_3\) has only one replaceable hydrogen ion(monobasic), that can be replaced by a metallic ion or ammonium ion. Thus, it cannot form an acidic nor basis salt or any other type aside normal salt.

Graphite is an excellent dry lubricant. This is because its layered structure allows one layer to slide over another easily. It is non-volatile and not sticky.

Equilibrium is a state of a system where there is no observable change in the properties of the system with respect to time

In this case, an increase in in temperature will cause the equilibrium position to shift to the left thereby decreasing the yield of ammonia.

Since the temperature of air remain constant.So, it is a isothermal process. PV=K This eq. shows that on increasing pressure, the volume gets reduced and vice-versa. Since the syringe is slowly compressed, volume is decreasing. Therefore, the pressure inside the syringe will increases because the molecules now hit the syringe walls more frequently.

A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure

4HCl + \(O_2\) -- 2C\(l_2\) + 2\(H_2\)O 4:2 = 4/2 2:1

P = 10atm, T= 320K, V= 8.2dm\(^{3}\) PV =nRT n = P * V/R * T 10 * 8.2/0.082 * 320 = 82/26.24 n = 3.13

V= 50cm\(^{3}\) Mass= 5.05g Relative molecular mass of KN\(O_3\) = (39+14+(3*16)) = 101 Convert 50cm\(^{3}\) to dm\(^{3}\) which is 1000cm³ = 1dm\(^{3}\) 50cm³ = 50*1/1000 = 0.05dm\(^{3}\) Moles = mass/ molar mass = 5.05/101 =0.05mole Solubility= mole/volume Solubility=0.05mol/0.05dm\(^{3}\) Solubility=1.0mol/dm_\(^{3}\)

The reactivity series allows us to predict how metals react. A more reactive metal displaces a less reactive metal from a compound. Lead is more reactive metal than copper hence, copper is displaced from copper solution by lead.

. % of C in Ca(HCO3)2 Molar mass of Ca(HCO3)2 = 40+(1+12+(16*3))2 =40+(13+48)2 =40+122 =162 C/Ca(HCO3)2 x 100 =12 * 2/162 * 100 =14.8%

Hydrogen bond is an intermolecular force which arises when hydrogen is covalently linked to elements like nitrogen, oxygen and fluorine.

Nitrogen has three unpaired electrons and one lone pair of electrons; therefore, it can form three covalent bonds and one coordinate bond. E.g ammonium ion.

- Recognise the functional group in the compound. This will determine the suffix of the name - Find the longest continuous carbon chain that contains the functional group (it won't always be a straight chain) and count the number of carbon atoms in this chain. This number will determine the prefix (the beginning) of the compound's name - Number the carbons in the longest carbon chain (Important: If the molecule is not an alkane (i.e. has a functional group) you need to start numbering so that the functional group is on the carbon with the lowest possible number). Start with the carbon at the end closest to the functional group. - Look for any branched groups: Name them by counting the number of carbon atoms in the branched group and referring to Table 4.6, these groups will all end in -yl. Note the position of the group on the main carbon chain. If there is more than one of the same type of branched group then both numbers must be listed (e.g. 2,4 -) and one of the prefixes listed in Table 4.7 must be used. Important: If the molecule is an alkane the branched group must be on the carbon with the lowest possible number. The branched groups must be listed before the name of the main chain in alphabetical order (ignoring di/tri/tetra). If there are no branched groups this step can be ignored. - For the alkyl halides the halogen atom is treated in much the same way as branched groups: To name them take the name of the halogen atom (e.g. iodine) and replace the -ine with -o (e.g. iodo) Give the halogen atom a number to show its position on the carbon chain. If there is more than one halogen atom the numbers should be listed and a prefix should be used (e.g. 3,4-diiodo- or 1,2,2-trichloro-). See Table 4.7 for a list of the prefixes. The halogen atoms must be listed before the name of the main chain in alphabetical order (ignore di/tri/tetra). If there are no halogen atoms this step can be ignored. - Combine the elements of the name into a single word in the following order: branched groups/halogen atoms in alphabetical order (ignoring prefixes) prefix of main chain name ending according to the functional group and its position on the longest carbon chain.