A gas of volume 900 cm³ at 27⁰ C when warmed at constant pressure to 87^oc will occupy a new volume of

1.  900cm³   
2. 720 cm³ 
3. 1080cm3
4.  540cm³   
5. 727cm³

Which of the following scientific statements needs to be proved through scientific research?

1.  Hypothesis 
2.  Principle 
3. Proposal
4. Conclusion  
5. Measurement

(iii)    What will be the acceleration of the car while its speed was increasing as shown in Figure 1?

1. 0.8m/s²
   
2. 0.4m/s²
3. 2.5m/s²
4. 1.125m/s²
5. 3.125m/s²

(iv)      Which of the following electromagnetic waves have largest wavelength

1. Ultraviolet 
2. Infrared 
3.  Gamma rays
4.  Radio wave
5. X-rays

(v)       The device which operates under the principle oftotal internal reflection of light is called:

1.  magnifying lens
2.  plan mirror
3. telescope
4.  optical fibre
5.  pin-hole camera

(vi)      If 120 volts are used to light a 30-wattlight bulb, what will be the current flowing through that bulb?

1.   40A    
2.  30A  
3. 0.25A
4. 4A
5. 0.30A

(vii) When a lead - .acid accumulator is freshly made it has an electromotive force (e.m.f) of

1. 1.5A
2. 1.25
3. 2V
4. 3V
5. 1V

(viii)Which among the following radiations can be absorbed by a metal plate?

1.  Alpha (a) particle 
2.  Gamma (y) rays
3.  Beta (ß) particle
4.  X-rays  
5.  Cathode rays

(ix)Where are asteroids found in the solar system?

1.   Between Mercury and Venus
2.  Between Earth and Mars
3. Between Mars and Jupiter
4. Between Saturn and Uranus 
5. Between Neptune and Pluto

(x)    What fraction of the atoms would have been disintegrated in 72 hours when the half-life of an element is 24 hours?

1. 1/8
   
2. 1/2
3. 3/4
4. 7/8
5. 1/4