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Q:

Earth's crust mainly contains ______.

A) bauxite B) manganese
C) silica D) iron
 
Answer & Explanation Answer: C) silica

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Q:

Which among the following is false about viscosity?

A) Viscosity of gases is less than that of liquids B) Viscosity of gases increases with rise in temperature
C) Viscosity of liquid decreases with rise in temperature D) Viscosity of liquid decreases with increase in pressure
 
Answer & Explanation Answer: D) Viscosity of liquid decreases with increase in pressure

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Q:

The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period?

A) 23 B) 21
C) 19 D) 11
 
Answer & Explanation Answer: B) 21

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Q:

....... is displaced when zinc is added to the solution of copper sulphate

A) Copper B) Hydrogen
C) Zinc D) Sulphate
 
Answer & Explanation Answer: A) Copper

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Q:

Which among the following metal is used for galvanization?

A) Zinc B) Copper
C) Iron D) Silver
 
Answer & Explanation Answer: A) Zinc

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Q:

Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in

A) Conduction B) Convection
C) Radiation D) Both conduction and convection
 
Answer & Explanation Answer: B) Convection

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Q:

Which among the following is white phosphorus?

A) P1 B) P6
C) P4 D) P5
 
Answer & Explanation Answer: C) P4

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Q:

What is nature of pH of Milk?

A) Slightly Acidic B) Slightly Basic
C) Highly Acidic D) Highly Basic
 
Answer & Explanation Answer: A) Slightly Acidic

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