Question 1 :
The highest capacity of electron in an orbit follow the rule

Question 2 :
The number of electron at the outer most shell in elements of group 13 is

Question 9 :
Trend of atomic size from left to right across a period

Question 10 :
The number of electron at the outer most shell in elements of group 16 is

Question 12 :
The formation of a salt from an acid and a base involves the combination of................... from the acid and the...................from the....................to form....................... molecules.

Question 13 :
A solution turns blue litmus red. Its pH value is likely to be

Question 14 :
Select the acid which contains four hydrogen atoms in it :

Question 16 :
Which of the following metals can form bases when treated with water.

Question 22 :
Molecular reactions which are generally slow reactions are shown by :

Question 25 :
<table><tr><th>Column A</th> <th>Column B</th> </tr><tr><td>1. Metal</td> <td>a.Methane (CH{tex}_4{/tex})</td> </tr><tr><td>2. Covalent compound</td> <td>b.Sodium chloride (NaCl)</td> </tr><tr><td>3. Non-polar</td> <td>c.Selenium (Se)</td> </tr><tr><td>4. Polar</td> <td>d.Chloride ion (Cl{tex}^{–}{/tex})</td> </tr><tr><td>5. Non-metal</td> <td>e.Aluminium (Al)</td> </tr><tr><td>6. Electrovalent compound</td> <td>f.Carbon dioxide (CO{tex}_2{/tex})</td> </tr><tr><td>7. Anion</td> <td>g.Hydrogen chloride (HCl)</td> </tr><tr><td>8. Cation</td> <td>h.Potassium ion (K{tex}^{+}{/tex})</td> </tr></table>

Question 26 :
Which of the following is a common characteristic of a covalent compound ?

Question 27 :
A compound which contains all the three types of bonds i.e., ionic, covalent and coordinate is :

Question 28 :
A compound X consists of only molecules. Hence X will have :

Question 30 :
Bonding in this molecule can be understood to involve coordinate bonding :

Question 34 :
The number of atoms present in 12 g of carbon [{tex}^{12}_{6}\mathrm C {/tex} ]

Question 38 :
What volume of oxygen would be required to burn completely 350 ml of acetylene?

Question 39 :
The volume occupied by 7 g of nitrogen at STP is :

Question 41 :
During silver plating of an article using potassium argentocyanide as an electrolyte, the anode material should be :

Question 43 :
We can expect that pure water will not normally conduct electricity.

Question 44 :
When dilute sodium chloride is electrolysed using graphite electrodes, the cation is discharged at the cathode most readily.

Question 45 :
A solution of hydrogen chloride gas in water conducts electricity because it ionizes in solution to form free ions but a solution of hydrogen chloride gas in toluene does not conduct an electric current because it remains as a single molecule in solution.

Question 46 :
The whole apparatus of electrodes, electrolytes and vessel containing them is called

Question 48 :
The electrochemical series is formed in order of the metal regarding

Question 51 :
The hydroxide which is soluble in excess of NaOH is :

Question 52 :
The hydroxide which is soluble in excess of NaOH is :

Question 56 :
<table><tr><th>Column A</th> <th>Column B</th> </tr><tr><td>1. Pb(NO{tex}_3{/tex}){tex}_2{/tex} from PbO</td> <td>a.Simple displacement</td> </tr><tr><td>2. MgCl{tex}_2{/tex} from Mg</td> <td>b.Titration</td> </tr><tr><td>3. FeCl{tex}_3{/tex} from Fe</td> <td>c.Neutralization</td> </tr><tr><td>4. NaNO{tex}_3{/tex} from NaOH</td> <td>d.Precipitation</td> </tr><tr><td>5. ZnCO{tex}_3{/tex} from ZnSO{tex}_4{/tex}</td> <td>e.Combination</td> </tr></table>

Question 57 :
A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide is :

Question 58 :
The precipitate of which of the following compounds is soluble in excess of ammonia solution ?

Question 60 :
Which one of the following salt solutions on reaction with excess of ammonium hydroxide solution results finally in dissolution of the precipitate first formed ?