Match  the column A with columnB:

Answer as follows:

i) Correct item from B matching sodium chloride.

ii) Correct item from B matching ammonium ion, and so on.

Match  the column A with columnB:

i)     Correct item from B matching sodium chloride.Answer as follows:

ii)     Correct item from B matching ammonium ion, and so on.

3.

Form the list given below, select the words(s) required to correctly complete the blanks (i) to (v) in the following passage:

Note: words chosen from the list are to be used only once. Write only the answer.Do not copy the passage.

[reddish brown,ammonium, nitrogen dioxide,hydroxyl, dirty green, ammonia,acidic, alkaline]

Nitrogen and hydrogen combine in the presence of a catalyst to give (i) ………gas  when the above-mentioned gas is passed through water it forms a solution which will be (ii) …………in nature and the solution contains (iii)………ions and (iv) ……….ions. the above solution when added to iron(II)sulphate solution, gives a (v) ……coloured precipitate of iron(II) hydroxide.

Select from the list given (A to E) one substance in each case which matches the description give in parts (i) to (v). Note : Each substance is used only in the answer.)

A)     Nitroso Iron (II) sulphate

B)      Iron(III) chloride

C)      Chromium sulphate

D)     Lead (II) chloride

E)      Sodium chloride

The compounds responsible for the brown ring during the brown ring test of nitrate ion.

Select the correct answer from  the choices A,B, C and D which are given:

Write only the letter corresponding to the correct answer.

An organic compound undergoes additional reactions and gives a red colour precipitate with ammoniacal cuprous chloride. Therefore, the organic compound could be:

• Ethane

• Ethene

• Ethyne

• Ethyne

Select the correct answer from  the choices A,B, C and D which are given:

Write only the letter corresponding to the correct answer.

The organic compound mixed with ethanol to make it spurious is:

• Methanol

• Methanoic acid

• Methanal

• Methanal

Select  the correct answer from the choices A, B,Cand D which are given.

Write only the letter corresponding to the correct answer.

The number of electrons present in the valence shell of a halogen is:

• 1

• 3

• 5

• 5

Select the correct answer from the choices A,B,C and D which are given:

Write only the letter corresponding to the correct answer.

A particular solution contains molecules and ions of the solute so it is a :

• Weak acid

• Strong acid

• Strong base

• Strong base

Select the correct answer from the choices A,B,C and D which are given:

Write only the letter corresponding to the correct answer.

An organic weak acid is :

• Formic acid

• Sulphuric acid

• Nitric acid

• Nitric acid

Select the correct answer from the choices A,B,C and D which are given:

Write only the letter corresponding to the correct answer.
An example of a complex salt is:

• Zinc sulphate

• Sodium hydrogensulphate

• Iron (II) ammonium sulphate

• Iron (II) ammonium sulphate