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.
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.
| A. Electronegativity across the period | (i) Increases |
| B. Non-Metallic character down the group | (ii) Decreases |
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.
An organic weak acid is :
Formic acid
Sulphuric acid
Nitric acid
Nitric acid
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.
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.
| A. Sodium chloride | (i) Increases |
| B. Ammonium ion | (ii) Covalent bond |
| C. Electronegativity across the period | (iii) Ionic bond |
| D. Electronegativity across the period | (iv) Covalent the coordinate bond |
| E. Carbon tetrachloride | (v) Decerease |
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.
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,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
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
