| 1 |
Which one among the following is not a source of renewable energy?
|
Fuel cell <br>
Solar energy <br>
Hydroelectricity <br>
Wind energy <br>
|
| 2 |
A liquid rises to a certain length in a capillary tube, The tube is inclined to an angle of 45°.
|
Decrease <br>
Increase <br>
First decrease and then increase <br>
Remain unchanged<br>
|
| 3 |
Magnets attract magnetic substances such as iron , nickel, cobalt etc. They can also repel:
|
Diamagnetic substances <br>
Ferromagnetic substances<br>
Paramagnetic substances <br>
None magnetic substances <br>
|
| 4 |
When a ray of light is going from one medium to another, its:
|
Frequency remains same <br>
Frequency increases <br>
Wavelength<br>
Wavelength remains same <br>
|
| 5 |
Which one among the following is he main ingredient in cement
|
Lime stone<br>
Gypsum <br>
Clay<br>
Ash
|
| 6 |
Glass is actually:
|
A crystalline solid <br>
an ionic solid <br>
a vitrified liquid <br>
an elastic solid <br>
|
| 7 |
Iron nails are dipped into blue copper sulphates solution. After some time iron nails are
|
Dissolved and blue colour is discharged <br>
not dissolved but blue colour is discharged <br>
dissolved but blue colour is not discharged <br>
not dissolved and blue colour is not discharge <br>
|
| 8 |
A student by chance mixed acetone ewi9th alcohol.This mixture of acetone and alcohol can be separated by:
|
Fractional distillation <br>
Filtration <br>
Separating funnel <br>
Fractional crystallisation <br>
|
| 9 |
Silver were turns black after a period of time due of formation of
|
Nitrate coating on silver <br>
Oxide coating on silver <br>
Chloride coating on silver <br>
Sulphide coating on silver <br>
|
| 10 |
Which one among the following methods is not affective in removing arsenic form contaminated ground water
|
Reverse osmosis <br>
Boiling <br>
In exchange <br>
Coagulation-adsorption <br>
|
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