A body is moving with a constant speed \( v \) in a circular path of radius \( r \). The magnitude of average velocity after half a revolution is:

• (A) \(\frac{2v}{\pi}\)
• (B) \( v \)
• (C) \(\frac{v}{\pi}\)
• (D) zero

Which of the following is the most electronegative element?

• (A) Fluorine
• (B) Chlorine
• (C) Oxygen
• (D) Nitrogen

If \( \alpha \) and \( \beta \) are the roots of \( x^2 - 5x + 6 = 0 \), the value of \( \alpha^2 + \beta^2 \) is:

• (A) 13
• (B) 25
• (C) 10
• (D) 15

The focal length of a concave mirror is 20 cm. The distance at which an object should be placed to get a real image of same size is:

• (A) 10 cm
• (B) 20 cm
• (C) 40 cm
• (D) 30 cm

What is the common name of \( CH_3COOH \)?

• (A) Acetic acid
• (B) Formic acid
• (C) Oxalic acid
• (D) Citric acid

The value of \( \sin^2 30^\circ + \cos^2 30^\circ \) is:

• (A) 1
• (B) 0
• (C) 0.5
• (D) \(\sqrt{3}\)

A current of 5 A flows through a wire for 10 minutes. The total charge passed is:

• (A) 500 C
• (B) 50 C
• (C) 300 C
• (D) 3000 C

Which gas is liberated when an acid reacts with a metal?

• (A) Hydrogen
• (B) Oxygen
• (C) Carbon dioxide
• (D) Nitrogen

The sum of the first 10 terms of an AP with \( a = 2 \) and \( d = 3 \) is:

• (A) 155
• (B) 145
• (C) 165
• (D) 150

An object of 10 kg at a height of 5 m has potential energy (\( g = 9.8 \) m/s²):

• (A) 49 J
• (B) 500 J
• (C) 490 J
• (D) 980 J

Which of these is a saturated hydrocarbon?

• (A) Ethane
• (B) Ethene
• (C) Ethyne
• (D) Benzene

If the radius of a circle is doubled, its area becomes:

• (A) Four times
• (B) Double
• (C) Eight times
• (D) Remains same

The SI unit of power is:

• (A) Watt
• (B) Joule
• (C) Newton
• (D) Pascal

Which non-metal is liquid at room temperature?

• (A) Mercury
• (B) Bromine
• (C) Iodine
• (D) Carbon

Probability of getting a number \(>\) 4 on a fair die is:

• (A) \(\frac{1}{2}\)
• (B) \(\frac{1}{3}\)
• (C) \(\frac{1}{6}\)
• (D) \(\frac{2}{3}\)