1 |
The colour of litmus paper in strong acidic solution. |
Red
Blue
Yellow
Colourless
|
2 |
The meaning of latin word acidus is. |
Sweet
Tasteless
Salty
Sour
|
3 |
Acids turn |
Blue litmus red
Red litmus blue
Blue litmus green
Blue litmus blue
|
4 |
Formula of Potassium ferrocyanide. |
K<sub>4</sub>[Fe(CN)<sub>6</sub>]<sup>-4</sup>
K<sub>3</sub>[Fe(CN)<sub>4</sub>]<sup>-3</sup>
K<sub>2</sub>[Fe(CN)<sub>6</sub>]<sup>-4</sup>
K<sub>4</sub>[Fe(CN)<sub>5</sub>]<sup>-4</sup>
|
5 |
There are ____________ types of salts. |
2
3
6
8
|
6 |
Which is used for cleaning agent for domestic and commercial purpose? |
NaCl
Na<sub>2</sub>CO<sub>3</sub>
NaHCO<sub>3</sub>
Na<sub>2</sub>SiO<sub>3</sub>
|
7 |
Which salt is used for the manufacture of detergents, pulp and paper? |
NaCl
Na<sub>2</sub>CO<sub>3</sub>
Na<sub>2</sub>SiO<sub>3</sub>
NaCl
|
8 |
Which salt is used as a table salt? |
NaCl
Na<sub>2</sub>CO<sub>3</sub>
Na<sub>2</sub>SiO<sub>3</sub>
NaCl
|
9 |
Methyl orange produces which colour in basic solution |
Red
Yellow
Pink
White
|
10 |
Phenolphthalein produces red colour in |
Acid
Base
Both a and b
None of these
|
11 |
Indicators are the |
Inorganic compounds
Organic compounds
Ionic compounds
Covalent compounds
|
12 |
Basic solution have pH value. |
Less than 7
Greater than 7
equal to 7
None of these
|