Objective General Knowledge

Q. Which one among the following is not a source of renewable energy?
1 Hydroelectricity
2 Solar energy
3 Fuel cell
4 Wind energy
Ans: 3
Q. A liquid rises to a certain length in a capillary tube. The tube is inclined to an angle of 45°. The length of the liquid column will:
1 increase
2 decrease
3 remain unchanged
4 first decrease and then increase
Ans: 1
Q. Mass of B is four times that of A. B moves with a velocity half that of A. Then B has:
1 kinetic energy equal to that of A.
2 half the kinetic energy of A
3 twice the kinetic energy of A.
4 kinetic energy one-fourth of A.
Ans: 1
Q. In a pressure cooker cooking is faster because the increase in vapour pressure:
1 increase the boiling point.
2 increase the specific heat.
3 decrease the specific heat.
4 decrease the boiling point.
Ans: 1
Q. Magnets attract magnetic substances such as iron, nickel, cobalt etc. They can also repel:
1 paramagnetic substances
2 ferromagnetic substances
3 diamagnetic substances
4 non-magnetic substances
Ans: 3
Q. When a ray of light is going from one medium to another, its:
1 wavelength remains same
2 frequency remains same
3 frequency increases
4 wavelength increases
Ans: 2
Q. Which one among the following is the main ingredient in cement?
1 Ash
2 Gypsum
3 Lime stone
4 Clay
Ans: 2
Q. Glass is actually:
1 a vitrifies liquid
2 a crystalline solid
3 an ionic solid
4 an elastic solid
Ans: 1
Q. Solutions in test tubes containing H2O and aqueous NaOH can be differentiated with the help of:
1 red litmus
2 blue litmus
3 Na2CO3
4 HCl (aqueous)
Ans: 1
Q. A student heated some sulphur in a spatula and collected the gas 'X'. Which one among the following is correct about 'X'?
1 X is SO2 and it turns moist litmus to blue
2 X is SO3 and it turns moist litmus to red
3 X is SO2 and it turns moist litmus to red
4 X is SO3 and it turns dry litmus to blue
Ans: 3