Directions (Q. 1 - 7): Solve the following questions:

1. The chemical which is used in art and craft and can cause anemia and leukemia is ____

(A) Benzene 
(B) Dioxine
(C) Phthalate 
(D) Aldrin

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2. What are the signals that inform the operating system that some activity has taken place, called ____

(A) Informers 
(B) Interrupts
(C) Events 
(D) Handlers

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3. A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum :

(A) just after it is dropped
(B) when it is just on the half-way
(C) just before it touches the ground
(D) when it touches the ground

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4. Which acid is stored in batteries ?

(A) Sulphuric acid
(B) Nitric acid
(C) Hydrochloric acid
(D) Acetic acid

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5. The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is :

(A) Neon 
(B) Argon
(C) Krypton 
(D) Helium

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6. Who invented aeroplane ?

(A) Orville Wright and Wilbur Wright
(B) Sir Frank Whittle
(C) Michael Faraday
(D) Christian Huygens

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7. Hydraulic machines work on the Principle of ____

(A) Newton’s Law 
(B) Joules Law
(C) Pascal’s Law 
(D) Floatation Law

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