Q. 1. Woolen Clothes Q. 1. Woolen Clothes protect the body from cold protect the body from cold because-because-(a)(a) Cloth is a poor conductor of Cloth is a poor conductor of

heatheat

(b)(b) Cloth is good conductor of heatCloth is good conductor of heat

(c)(c) External heat rays enter into the External heat rays enter into the body through woolen clothesbody through woolen clothes

(d)(d) None of aboveNone of above

Ans. (a)Ans. (a)

Q.2. The owl can see Q.2. The owl can see most clearly in total most clearly in total darkness because-darkness because-

(a)(a)It has squint eyesIt has squint eyes

(b) It has large eyes with orbs (b) It has large eyes with orbs directed forward, giving it directed forward, giving it binocular sightbinocular sight

(c) It has light bulbs in its eyes (c) It has light bulbs in its eyes provided by natureprovided by nature

Ans. (b)Ans. (b)

Q.3 Stainless steel contains-Q.3 Stainless steel contains-

(a) Chromium,Nickel,Iron (a) Chromium,Nickel,Iron and Carbonand Carbon

(b) Nickel,Iron and Carbon(b) Nickel,Iron and Carbon

(c) Iron and Carbon only(c) Iron and Carbon only

(d) Chromium,Iron and (d) Chromium,Iron and CarbonCarbonAns. (d)Ans. (d)

Q.4 The maximum limit of Q.4 The maximum limit of sound beyond which a sound beyond which a person can become deaf person can become deaf is-is-

Ans. (d)Ans. (d)

(a) 55 db(a) 55 db

(b) 75 db(b) 75 db

(c) 85 db(c) 85 db

(d) 120 db(d) 120 db

Too… Too… NoisyNoisy

Q.5 Which gas often Q.5 Which gas often creates more air- creates more air- pollution?pollution?

Ans. (c)Ans. (c)

(a)(a) NitrogenNitrogen

(b)(b) Carbon dioxide Carbon dioxide

(c) Carbon monoxide(c) Carbon monoxide

(d) Oxygen(d) Oxygen

Q.6 During cardiac Q.6 During cardiac failure, which of the failure, which of the following is advised as a following is advised as a first aid?first aid?

Ans. (a)Ans. (a)

(a)(a)Mouth of Mouth resuscitationMouth of Mouth resuscitation

(b) Giving external cardiac (b) Giving external cardiac MassageMassage

(c) Giving cool water to drink(c) Giving cool water to drink

(d) Giving complete body (d) Giving complete body MassageMassage

Q.7 … waves cannot be Q.7 … waves cannot be transmitted through transmitted through vacuum-vacuum-

(a) Light(a) Light

(b) Heat(b) Heat

(c) Sound(c) Sound

(d) Electromagnetic(d) Electromagnetic

Ans. (c)Ans. (c)

Q.8 The small bats can fly in dark Q.8 The small bats can fly in dark because-because-((a) They have weak a) They have weak

legs land are likely legs land are likely to be attacked by to be attacked by predatorspredators

(b) They generate (b) They generate flashes of lightflashes of light

(c) They generate (c) They generate ultrasonic sound ultrasonic sound waveswaves

(d)They can see the (d)They can see the objects in darknessobjects in darkness

Ans. (c)Ans. (c)

(a)(a)Decreases Decreases

(b) Increases(b) Increases

(c) Remains the same(c) Remains the same

(d) Is zero(d) Is zero

Q.9 The time period of a Q.9 The time period of a pendulum on moon-pendulum on moon-

Ans. (b)Ans. (b)

(a)(a)Water expands on freezingWater expands on freezing

(b) Bottle contracts at freezing point(b) Bottle contracts at freezing point

(c) Temperature outside the bottle is ten (c) Temperature outside the bottle is ten than that inside than that inside

(d) None of above(d) None of above

Q. 10 When water is filled in a Q. 10 When water is filled in a bottle and is allowed to freeze, bottle and is allowed to freeze, the bottle because –the bottle because –

Ans. (a)Ans. (a)