1. On my way to school I met an old friend of mine, but I did not have enough time to waste and so I had to cut him dead. The underlined part means-
A. To deceive in accountsB. To deceive in appearanceC. Completely ignore someoneD. Show false formality
2. I fancy I ____ pale.
A. turnedB. turnsC. am turningD. had turned
3. If de-Broglie wavelength of an electron is then what is its momentum? 1.5 × 10−12m
A. 4.42 × 10−22 kgms−1B. 4.42 × 10−21 kgms−1C. 4.42 × 10−23 kgms−1D. 4.42 × 10−24 kgms−1 p = h λ = 6.63×10−34 1.5×10−12 = 4.42 × 10−22 kgms−1
4. What is the value of kinetic energy of one mole of helium gas at 27°C temperature?
A. 3500 JB. 3845 JC. 3650 JD. 3741 J Ek = f 2 nRT = 3 2 × 1 × 8.314 × 300 = 3741 J
5. If the distance of the point situated on the ellipse from the origin is 5 unit, then (5cosθ, 4sinθ) x2 25 + y2 16 = 1 θ =?
A. π 2B. π 4C. π 3D. π √25cos2 θ + 16sin2 θ = 5 ⇒ 25cos2 θ + 16 − 16cos2 θ = 25 ⇒ cos2 θ = 1 ⇒ θ = 0, π
6. The straight line joining the planet and the sun subtends equal areas in equal intervals of time. Which law is it?
A. Newton’s lawB. Kepler’s Second lawC. Gauss’s lawD. Maxwell’s law