Question Library

Reducing agent like SO\(_2\). Sulphur dioxide gas (SO\(_2\)) is bubbled through acidified potassium dichromate. The orange solution turns green.

When Hydrogen sulphide gas is bubbled through solutions of such metals, the colored sulphides are precipitated. Hydrogen sulphide is a also strong reducing agent.

The reactivity series of metals, also known as the activity series, refers to the arrangement of metals in the descending order of their reactivities. Na > Ca > Mg > Al > Zn > Fe > Sn > Pb > Cu > Ag. Considering metallic property which increases down the group, barium will be ranked calcium

Oxidation of Copper turnings with concentrated trioxonitrate (V) acid wil Cu + 4HNO\(_3\) → CuNO\(_3\) + 2H\(_2\)O +2NO\(_2\).

uses of wrought iron It is used to make decor items like table base, candle holder, curtain rods etc. It is used in making pipes. It is used in making fences and gates. It is used in making nuts, bolts, rivets etc. It is used in making chains.

Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. The bromine loses its original red-brown colour to give a colourless liquid. Alkynes also react with bromine, decolorising it though not as immediate as alkenes.

Positional isomers, also known as position isomers, are molecules with the same molecular formula and the same functional groups, but where the functional groups are in different positions on the carbon chain. This type of structural isomerism results in molecules with distinct properties despite having the same overall chemical composition. In Option D, the compound CH\(_2\)CHBrCH\(_2\)Br (1,2- dibromopropane) has two other isomers with itself as 1,1-dibromopropane and 2,2-dibromopropane. Hence, it is the correct answer.

In chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond. Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds.

Alkanes have the general formula of CnH2n+2 where n is the number of carbon atoms. Alkenes have the general formula CnH2n. The general formula for Alkynes is CnH2n-2.

(3\(\frac{1}{2} + 4\frac{1}{3}) \div (\frac{5}{6} - \frac{2}{3}\)) = (7\(\frac{3 + 2}{6}) \div \frac{(5 - 4)}{6}\) 7\(\frac{5}{6} \div \frac{1}{6} = \frac{47}{6} \times \frac{6}{1}\) = 47

N1122 = $8; x = $36 x x $8 = N1122 x $36 \(\frac{N1122 \times $36}{$8}\) = x x = N5049

22three, 34five, 21six = (2 x 3)(2 x 3o), (3 x 51) = (4 x 50), (2 x 61) + (1 x 60) = (6 + 2), (15 + 4), (12 + 1) = 8ten, 29ten, 13ten in descending order 29ten, 13ten, 8ten = 34five, 21six, 22three

A = P + I p + \(\frac{PRT}{100}\) A = N3000 (1 + \(\frac{6 \times 5}{100}\)) = N3000(1 + 0.3) A = N3000 (1.3) = N3,900.00

\(\sqrt{0.000144}\) = 0.012 = 1.2 x 10-2

No expanded working has been attached for this question yet. The verified answer is Option C.