Which is the electronic configuration of a nobel gas?

• A) 2,8,7
• B) 2,8,3
• C) 2,8
• D) 2,5

If an incident ray passes through the centre of curvature of a spherical mirror, the reflected ray will:

• A) Retrace its path
• B) Pass through the pole
• C) Pass through the focus
• D) Pass through the centre of curvature

The power of a machines do a work of 100J in 10 seconds is _____ .

• A) 10 watt
• B) 500 watt
• C) 1000 watt
• D) 100 watt

The shielding effect in Na is

• A) Equal of that k
• B) Greater than that of k
• C) Equal of that Li
• D) Greater than that of Li

When two bodies are moving relative to one another the motion between them is

• A) relative
• B) rotational
• C) circular
• D) translatory

Products excreted by the skin are excess water, urea, uric acid and

• A) oil
• B) carbon dioxide
• C) salt
• D) hairs

The blue cooler of ocean is due to ______.

• A) Absorption of light
• B) Scattering of light
• C) Refraction of light
• D) Reflection of light

Water has an expansion which is considered as an anomalous behaviour at which temperature range:

• A) 373 ºC to 383 ºC
• B) 273 ºC to 283 ºC
• C) –10 ºC to 0 ºC
• D) 0 ºC to 10 ºC

A plane flies west at a speed of 300 km per hour for one hour. It then turns South and flies at the same speed of 300 km per hour for a further 1½ hours. Its average speed is:

• A) 450 km per hour
• B) 200 km per hour
• C) 300 km per hour
• D) 100 km per hour

___________is a most reactive metal.

• A) Zn
• B) Cs
• C) Au
• D) Na

Two objects X and Y are moving. If the speed of X is double that of Y and mass of X is half of Y. The ratio of their kinetic energies would be:

• A) 0.75
• B) 0.25
• C) 2.00
• D) 1.00

HCl is dissolved in water due to _______

• A) Covalent bonding
• B) Ionic bonding
• C) H-bonding
• D) Non-polarity of HCl

The motion during the flight of a mosquito is an example of:

• A) vibratory motion
• B) translatory motion
• C) random motion
• D) circular motion

Hydrogen has___________isotopes

• A) Three
• B) Eight
• C) Four
• D) Six

If the temperature of the substance does not rise after the addition of heat in it, which one of the following statements presents the best justification for this observation?

• A) The substance must be a gas.
• B) The substance must be cooler than its environment.
• C) The substance has unusual thermal properties.
• D) The substance undergoes a change of phase.

The colors that make up white light are called-----------?

• A) Visible spectrum
• B) Rainbow
• C) Energy waves
• D) Prism

Reactivity of Halogens………….

• A) I do not know
• B) Does not change in group
• C) Increases down the group
• D) Decreases down the group

Two athletes one of mass 50 kg and the other of mass 65 kg run a race of 50m. Both athletes tie the race (completing the race at the same time). Which line is correct

• A) the heavier athlete develops more power
• B) Both athletes develop the same power
• C) The kinetic Energy of the lighter athlete is greater
• D) The lighter athlete develops more power

Which element in the blood is round and colorless?

• A) Red blood cells
• B) Plasma
• C) Platelets
• D) White blood cells

Find the power of a convex lens, if it’s focal length of is 25 cm:

• A) 2.5 D
• B) 0.4 D
• C) 4 D
• D) 0.25 D