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Q:

If Metal A displaces Metal B from its solution, then Metal A ____.

A) is more reactive than B B) is less reactive than B
C) is heavier than B D) has the same reactivity as B
 
Answer & Explanation Answer: A) is more reactive than B

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Q:

Which of the following is not correct with reference to Bio-sand Water Filter?

A) It deactivates or kills pathogens B) Sedimentation removes larger particles
C) Filtration removes smaller particles D) High quality water is always assured
 
Answer & Explanation Answer: D) High quality water is always assured

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Q:

What product is formed when electricity is passed through an aqueous solution of sodium chloride?

A) Sodium and Chlorine B) Sodium oxide
C) Sodium hydroxide D) Sodium and water
 
Answer & Explanation Answer: C) Sodium hydroxide

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Q:

The state of matter can be changed into another state by changing the

A) Volume B) Density
C) Shape D) Temperature
 
Answer & Explanation Answer: D) Temperature

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Q:

All isotopes of the same element have ____________

A) different atomic numbers and different atomic mass B) different atomic numbers and the same atomic mass
C) the same atomic number but different atomic masses D) the same atomic number and the atomic mass
 
Answer & Explanation Answer: C) the same atomic number but different atomic masses

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Q:

Ice floats on water because its density is

A) more than water B) zero
C) less than water D) same as water
 
Answer & Explanation Answer: C) less than water

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Q:

Which of the following metals reacts vigorously with cold water?

A) Potassium B) Aluminium
C) Zinc D) Iron
 
Answer & Explanation Answer: A) Potassium

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Q:

Which of the following is not a constituent of biogas?

A) Carbon dioxide B) Hydrogen Sulphide
C) Methane D) Carbon Monoxide
 
Answer & Explanation Answer: A) Carbon dioxide

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